In the United States, a tax is imposed on income by the federal government, most state governments, and many local governments. The income tax is determined by applying a tax rate, which may increase as income increases, to taxable income as defined. Individuals and corporations are directly taxable, and estates and trusts may be taxable on undistributed income.
In the United States, the term 'payroll tax' usually refers to 'FICA taxes' that pay into Social Security and Medicare, while 'income tax' refers taxes that pay into state and federal general funds.
Partnerships are not taxed, but their partners are taxed on their shares of partnership income. Residents and citizens are taxed on worldwide income, while nonresidents are taxed only on income within the jurisdiction. Several types of credits reduce tax, and some types of credits may exceed tax before credits. An alternative tax applies at the federal and some state levels.
Taxable income is total income less allowable deductions. Income is broadly defined. Most business expenses are deductible. Individuals may also deduct a personal allowance (exemption) and certain personal expenses, including home mortgage interest, state taxes, contributions to charity, and some other items. Some deductions are subject to limits.
Capital gains are taxable, and capital losses reduce taxable income to the extent of gains (plus, in certain cases, $3,000 or $1,500 of ordinary income). Individuals currently pay a lower rate of tax on capital gains and certain corporate dividends.
Taxpayers generally must self assess income tax by filing tax returns. Advance payments of tax are required in the form of withholding tax or estimated tax payments. Taxes are determined separately by each jurisdiction imposing tax. Due dates and other administrative procedures vary by jurisdiction. April 15 following the tax year is the last day for individuals to file tax returns for federal and many state and local returns. Tax as determined by the taxpayer may be adjusted by the taxing jurisdiction.
2 Federal income tax rates for individuals
2.1 Marginal tax rates
2.1.1 Marginal tax rates since 2008
2.1.2 Marginal tax rates for 2017
2.2 Example of a tax computation
2.3 Effective income tax rates
3 Taxable income
3.1 Gross income
3.2 Business deductions
3.3 Personal deductions
4 Capital gains
5 Partnerships and LLCs
6 Corporate tax
6.1 Corporate tax rates
6.2 Deductions for corporations
7 Estates and trusts
8 Retirement savings and fringe benefit plans
10 Alternative minimum tax
11 Accounting periods and methods
12 Tax exempt entities
13 Special taxes
14 Special industries
15 International aspects
16 Social Insurance taxes
17 Withholding of tax
18 Tax returns
19 Tax examinations
19.1 Tax collection
20 Statute of limitations
22.2 Early federal income taxes
22.3 Ratification of the Sixteenth Amendment
22.4 Modern interpretation of the power to tax incomes
22.5 Income tax rates in history
22.5.1 History of top rates
22.5.2 Federal income tax rates
23 Sources of U.S. income tax laws
24 The complexity of the U.S. income tax laws
25 State, local and territorial income taxes
26.1 Proposals for changes of income taxation
26.3 Taxation vs. the states
26.4 Tax protestors
26.6 Effects on income inequality
27 See also
30 Additional reading
Federal government receipts by source, 2010.
A tax is imposed on net taxable income in the United States by the federal, most state, and some local governments. Income tax is imposed on individuals, corporations, estates, and trusts. The definition of net taxable income for most sub-federal jurisdictions mostly follows the federal definition.
The rate of tax at the federal level is graduated; that is, the tax rates on higher amounts of income are higher than on lower amounts. Some states and localities impose an income tax at a graduated rate, and some at a flat rate on all taxable income. Federal tax rates in 2013 varied from 10% to 39.6%.
Individuals are eligible for a reduced rate of federal income tax on capital gains and qualifying dividends. The tax rate and some deductions are different for individuals depending on filing status. Married individuals may compute tax as a couple or separately. Single individuals may be eligible for reduced tax rates if they are head of a household in which they live with a dependent.
Taxable income is defined in a comprehensive manner in the Internal Revenue Code and tax regulations issued by the Department of Treasury and the Internal Revenue Service. Taxable income is gross income as adjusted minus deductions. Most states and localities follow these definitions at least in part, though some make adjustments to determine income taxed in that jurisdiction. Taxable income for a company or business may not be the same as its book income.
Gross income includes all income earned or received from whatever source. This includes salaries and wages, tips, pensions, fees earned for services, price of goods sold, other business income, gains on sale of other property, rents received, interest and dividends received, alimony received, proceeds from selling crops, and many other types of income. Some income, however, is exempt from income tax. This includes interest on municipal bonds.
Federal receipts by source as share of total receipts (1950–2010). Individual income taxes (blue), payroll taxes/FICA (green), corporate income taxes (red), excise taxes (purple), estate and gift taxes (light blue), other receipts (orange).
Adjustments (usually reductions) to gross income of individuals are made for alimony paid, contributions to many types of retirement or health savings plans, certain student loan interest, half of self-employment tax, and a few other items. The cost of goods sold in a business is a direct reduction of gross income.
Business deductions: Taxable income of all taxpayers is reduced by deductions for expenses related to their business. These include salaries, rent, and other business expenses paid or accrued, as well as allowances for depreciation. The deduction of expenses may result in a loss. Generally, such loss can reduce other taxable income, subject to some limits.
Personal deductions: Individuals are allowed several nonbusiness deductions. A flat amount per person is allowed as a deduction for personal exemptions. For 2017 this amount is $4,050. Taxpayers are allowed one such deduction for themselves and one for each person they support.
Standard deduction: In addition, individuals get a deduction from taxable income for certain personal expenses. Alternatively, the individual may claim a standard deduction. For 2017, the standard deduction is $6,350 for single individuals, $12,700 for a married couple, and $9,350 for a head of household. The standard deduction is higher for individuals over age 65 or who are blind.
Itemized deductions: Those who choose to claim actual itemized deductions may deduct the following, subject to many conditions and limitations:
Medical expenses in excess of 10% of adjusted gross income,
State, local, and foreign taxes,
Home mortgage interest,
Contributions to charities,
Losses on nonbusiness property due to casualty, and
Deductions for expenses incurred in the production of income in excess of 2% of adjusted gross income.
Capital gains: and qualified dividends may be taxed as part of taxable income. However, the tax is limited to a lower tax rate. Capital gains include gains on selling stocks and bonds, real estate, and other capital assets. The gain is the excess of the proceeds over the adjusted basis (cost less depreciation deductions allowed) of the property. This limit on tax also applies to dividends from U.S. corporations and many foreign corporations. There are limits on how much net capital loss may reduce other taxable income.
Total U.S. Tax Revenue as a % of GDP and Income Tax Revenue as a % of GDP, 1945–2011, from Office of Management and Budget Historicals
Tax credits: All taxpayers are allowed a credit for foreign taxes and for a percentage of certain types of business expenses. Individuals are also allowed credits related to education expenses, retirement savings, child care expenses, some health care premiums, and a credit for each child. Each of the credits is subject to specific rules and limitations. Some credits are treated as refundable payments.
Alternative Minimum Tax: All taxpayers are also subject to the Alternative Minimum Tax if their income exceeds certain exclusion amounts. This tax applies only if it exceeds regular income tax, and is reduced by some credits.
Tax returns: Most individuals must file income tax returns to self assess income tax in each year their income exceeds the standard deduction plus one personal exemption. Some taxpayers must file an income tax return because they satisfy one of the following conditions:
Taxpayer owes any special taxes such as the Alternative Minimum Tax
Taxpayer received any HSA, Archer MSA, or Medicare Advantage MSA distributions
Taxpayer had net earnings from self-employment of at least $400
Taxpayer had wages of $108.28 or more from a church or qualified church-controlled organization that is exempt from employer social security and Medicare taxes
Other taxpayers must file income tax returns each year to self assess income tax. These returns may be filed electronically. Generally, an individual's tax return covers the calendar year. Corporations may elect a different tax year. Most states and localities follow the federal tax year, and require separate returns.
Tax payment: Taxpayers must pay income tax due without waiting for an assessment. Many taxpayers are subject to withholding taxes when they receive income. To the extent withholding taxes do not cover all taxes due, all taxpayers must make estimated tax payments.
Tax penalties: Failing to make payments on time, or failing to file returns, can result in substantial penalties. Certain intentional failures may result in jail time.
Tax returns may be examined and adjusted by tax authorities. Taxpayers have rights to appeal any change to tax, and these rights vary by jurisdiction. Taxpayers may also go to court to contest tax changes. Tax authorities may not make changes after a certain period of time (generally three years).
Federal income tax rates for individuals
As of 2010, 68.8% of Federal individual tax receipts including payroll taxes, were paid by the top 20% of taxpayers by income group - which earned 50% of all household income. The top 1%, which took home 19.3% paid 24.2% whereas the bottom 20% paid 0.4% due to deductions and the earned income tax credit.
Federal income brackets and tax rates for individuals are adjusted annually for inflation. The Internal Revenue Service (IRS) accounts for changes to the CPI and publishes the new rates as "Tax Rate Schedules".
Marginal tax rates
Marginal and effective federal income tax rates in the U.S. for 2013.
Marginal tax rates since 2008
[show]Marginal Tax Rates and Income Brackets for 2008
[show]Marginal Tax Rates and Income Brackets for 2009
[show]Marginal Tax Rates and Income Brackets for 2010
[show]Marginal Tax Rates and Income Brackets for 2011
[show]Marginal Tax Rates and Income Brackets for 2012
[show]Marginal Tax Rates and Income Brackets for 2013
[show]Marginal Tax Rates and Income Brackets for 2014
[show]Marginal Tax Rates and Income Brackets for 2015
[show]Marginal Tax Rates and Income Brackets for 2016
Marginal tax rates for 2017
Marginal Tax Rate Single Taxable Income Married Filing Jointly or Qualified Widow(er) Taxable Income Married Filing Separately Taxable Income Head of Household Taxable Income
10% $0 – $9,325 $0 – $18,650 $0 – $9,325 $0 – $13,350
15% $9,326 – $37,950 $18,651 – $75,900 $9,326 – $37,950 $13,351 – $50,800
25% $37,951 – $91,900 $75,901 – $153,100 $37,951 – $76,550 $50,801 – $131,200
28% $91,901 – $191,650 $153,101 – $233,350 $76,551 – $116,675 $131,201 – $212,500
33% $191,651 – $416,700 $233,351 – $416,700 $116,676 – $208,350 $212,501 – $416,700
35% $416,701 – $418,400 $416,701 – $470,700 $208,351 – $235,350 $416,701 – $444,550
39.6% $418,401+ $470,701+ $235,351+ $444,501+
Beginning in 2013, an additional tax of 3.8% applies to net investment income in excess of certain thresholds.
An individual pays tax at a given bracket only for each dollar within that tax bracket's range. The top marginal rate does not apply in certain years to certain types of income. Significantly lower rates apply after 2003 to capital gains and qualifying dividends (see below).
Example of a tax computation
Income tax for year 2017:
Single taxpayer, no children, under 65 and not blind, taking standard deduction;
$40,000 gross income – $6,350 standard deduction – $4,050 personal exemption = $29,600 taxable income
$9,325 × 10% = $932.50 (taxation of the first income bracket)
$29,600 – $9,325 = $20,275.00 (amount in the second income bracket)
$20,275.00 × 15% = $3,041.25 (taxation of the amount in the second income bracket)
Total income tax is $932.50 + $3,041.25 = $3,973.75 (~9.93% effective tax)
Note, however, that taxpayers with taxable income of less than $100,000 must use IRS provided tax tables. Under that table for 2016, the income tax in the above example would be $3,980.00.
In addition to income tax, a wage earner would also have to pay Federal Insurance Contributions Act tax (FICA) (and an equal amount of FICA tax must be paid by the employer):
$40,000 (adjusted gross income)
$40,000 × 6.2% = $2,480 (Social Security portion)
$40,000 × 1.45% = $580 (Medicare portion)
Total FICA tax paid by employee = $3,060 (7.65% of income)
Total federal tax of individual = $3,973.75 + $3,060.00 = $7,033.75 (~17.58% of income)
Total federal tax including employer's contribution:
Total FICA tax contributed by employer = $3,060 (7.65% of income)
Total federal tax of individual including employer's contribution = $3,973.75 + $3,060.00 + $3,060.00 = $10,093.75 (~25.23% of income)
Further information: Rate schedule (federal income tax)
Effective income tax rates
Effective tax rates are typically lower than marginal rates due to various deductions, with some people actually having a negative liability. The individual income tax rates in the following chart include capital gains taxes, which have different marginal rates than regular income. Only the first $118,500 of someone's income is subject to social insurance (Social Security) taxes in 2016. The table below also does not reflect changes, effectively with 2013 law, which increased the average tax paid by the top 1% to the highest levels since 1979, at an effective rate of 33% while most other taxpayers have remained at the near the lowest levels since 1979.
Effective Federal Tax Rates and Average Incomes for 2010
Quintile Average Income Before Taxes Effective Individual Income Tax Rate Effective Payroll Tax Rate Combined Effective Income and Payroll Tax Rate Total Effective Federal Tax Rate (includes corporate income and excise taxes)
Lowest $24,100 −9.2% 8.4% −0.8% 1.5%
Second $44,200 −2.3% 7.8% 5.5% 7.2%
Middle $65,400 1.6% 8.3% 9.9% 11.5%
Fourth $95,500 5.0% 9.0% 14.0% 15.6%
Highest $239,100 13.8% 6.7% 20.5% 24.0%
81st to 90th Percentiles $134,600 8.1% 9.4% 17.5% 19.3%
91st to 95th Percentiles $181,600 10.7% 8.9% 19.6% 21.6%
96th to 99th Percentiles $286,400 15.1% 7.1% 22.2% 24.9%
Top 1% $1,434,900 20.1% 2.2% 22.3% 29.4%
Income tax is imposed as a tax rate times taxable income. Taxable income is defined as gross income less allowable deductions. Taxable income as determined for federal tax purposes may be modified for state tax purposes.
Main article: Gross income
The Internal Revenue Code states that "gross income means all income from whatever source derived," and gives specific examples. Gross income is not limited to cash received. "It includes income realized in any form, whether money, property, or services." Gross income includes wages and tips, fees for performing services, gain from sale of inventory or other property, interest, dividends, rents, royalties, pensions, alimony, and many other types of income. Items must be included in income when received or accrued. The amount included is the amount the taxpayer is entitled to receive. Gains on property are the gross proceeds less amounts returned, cost of goods sold, or tax basis of property sold.
Certain types of income are exempt from income tax. Among the more common types of exempt income are interest on municipal bonds, a portion of Social Security benefits, life insurance proceeds, gifts or inheritances, and the value of many employee benefits.
Gross income is reduced by adjustments and deductions. Among the more common adjustments are reductions for alimony paid and IRA and certain other retirement plan contributions. Adjusted gross income is used in calculations relating to various deductions, credits, phase outs, and penalties.
Main article: Tax deduction
Most business deductions are allowed regardless of the form in which the business is conducted. Thus, an individual small business owner is allowed most of the same business deductions as a publicly traded corporation. A business is an activity conducted regularly with an intent to make a profit. Only a few business related deductions are unique to a particular form of doing business. The deduction of investment expenses by individuals, however, has several limitations, along with other itemized (personal) deductions.
The amount and timing of deductions for income tax purposes is determined under tax rules, not accounting rules. See Accounting periods and methods, below. Tax rules are based on principles similar in many ways to accounting rules, but there are significant differences. Deductions for most meals and entertainment costs are limited to 50% of the costs, and costs of starting up a business (sometimes called pre-operating costs) are deductible ratably over 60 months. Deductions for lobbying and political expenses are limited. Some other limitations apply.
Expenses that are likely to produce future benefits must be capitalized. The capitalized costs are then deductible as depreciation (see MACRS) or amortization over the period future benefits are expected. Examples include costs of machinery and equipment and costs of making or building property. IRS tables specify lives of assets by class of asset or industry in which used. When an asset the cost of which was capitalized is sold, exchanged, or abandoned, the proceeds (if any) are reduced by the remaining unrecovered cost to determine gain or loss. The gain or loss may be ordinary (as in the case of inventory) or capital (as in the case of stocks and bonds), or a combination (for some buildings and equipment).
Most personal, living, and family expenses are not deductible. However, see Personal deductions, below. Business deductions allowed for Federal income tax are almost always allowed in determining state income tax. Only some states, though, allow itemized deductions for individuals. Some states also limit deductions by corporations for investment related expenses. Many states allow different amounts for depreciation deductions. State limitations on deductions may differ significantly from Federal limitations.
Business deductions in excess of business income result in losses that may offset other income. However, losses from passive activities may be deferred to the extent they exceed income from other passive activities. Passive activities include most rental activities (except for real estate professionals) and business activities in which the taxpayer does not materially participate. In addition, losses may not, in most cases, be deducted in excess of the taxpayer's amount at risk (generally tax basis in the entity plus share of debt).
Individuals are allowed a special deduction called a personal exemption for dependents. This is a fixed amount allowed each taxpayer, plus an additional fixed amount for each child or other dependents the taxpayer supports. The amount of this deduction is $4,000 for 2015. The amount is indexed annually for inflation. The amount of exemption is phased out at higher incomes through 2009 and after 2012 (no phase out in 2010–2012).
Citizens and individuals who have U.S. tax residence may deduct a flat amount as a standard deduction. Alternatively, they may claim an itemized deduction for actual amounts incurred for specific categories of nonbusiness expenses. Expenses incurred to produce tax exempt income and several other items are not deductible. Home owners may deduct the amount of interest and property taxes paid on their principal and second homes. Local and state income taxes are deductible, or the individual may elect to deduct state and local sales tax. Contributions to charitable organizations are deductible by individuals and corporations, but the deduction is limited to 50% and 10% of gross income respectively. Medical expenses in excess of 10% of adjusted gross income are deductible, as are uninsured casualty losses. Other income producing expenses in excess of 2% of adjusted gross income are also deductible. For years before 2010, the allowance of itemized deductions was phased out at higher incomes. The phase out expired for 2010.
Main article: Capital gains tax in the United States
Taxable income includes capital gains. However, individuals are taxed at a lower rate on long term capital gains and qualifying dividends (see below). A capital gain is the excess of the sales price over the tax basis (usually, the cost) of capital assets, generally those assets not held for sale to customers in the ordinary course of business. Capital losses (where basis is more than sales price) are deductible, but deduction for long term capital losses is limited to the total capital gains for the year, plus for individuals up to $3,000 of ordinary income ($1,500 if married filing separately). An individual may exclude $250,000 ($500,000 for a married couple filing jointly) of capital gains on the sale of the individual's primary residence, subject to certain conditions and limitations. Gains on depreciable property used in a business are treated as ordinary income to the extent of depreciation previously claimed.
In determining gain, it is necessary to determine which property is sold and the amount of basis of that property. This may require identification conventions, such as first-in-first-out, for identical properties like shares of stock. Further, tax basis must be allocated among properties purchased together unless they are sold together. Original basis, usually cost paid for the asset, is reduced by deductions for depreciation or loss.
Certain capital gains are deferred; that is, they are taxed at a time later than the year of disposition. Gains on property sold for installment payments may be recognized as those payments are received. Gains on property exchanged for like kind property are not recognized, and the tax basis of the new property is based on the tax basis of the old property.
Before 1986 and from 2004 onward, individuals have been subject to a reduced rate of federal tax on capital gains (called long-term capital gains) on certain property held more than 12 months. This reduced rate (15% or 20%, depending on regular tax bracket) applies for regular tax and the Alternative Minimum Tax. The reduced rate also applies to dividends from corporations organized in the United States or a country with which the United States has an income tax treaty.
Ordinary Income Rate Long-term Capital Gain Rate* Short-term Capital Gain Rate Recapture of Depreciation on Long-term Gain of Real Estate Long-term Gain on Collectibles Long-term Gain on Certain Small Business Stock
10% 0% 10% 10% 10% 10%
15% 0% 15% 15% 15% 15%
25% 15% 25% 25% 25% 25%
28% 15% 28% 25% 28% 28%
33% 15% 33% 25% 28% 28%
35% 15% 35% 25% 28% 28%
* Capital gains up to $250,000 ($500,000 if filed jointly) on real estate used as primary residence are exempt.
After 2012, an additional tax bracket of 39.6% applies to ordinary income. The tax rate on long-term capital gains and dividends beginning 2013 for those in the 39.6% bracket is 20% plus a 3.8% surcharge for high-income filers.
Partnerships and LLCs
Business entities treated as partnerships are not subject to income tax at the entity level. Instead, their members include their shares of income, deductions, and credits in computing their own tax. The character of the partner's share of income (such as capital gains) is determined at the partnership level. Many types of business entities, including limited liability companies (LLCs), may elect to be treated as a corporation or as a partnership. Distributions from partnerships are not taxed as dividends.
Main article: Corporate tax in the United States
The U.S. federal effective corporate tax rate has become much lower than the nominal rate because of various special tax provisions.
Corporate tax is imposed in the United States at the federal, most state, and some local levels on the income of entities treated for tax purposes as corporations. Shareholders of a corporation wholly owned by U.S. citizens and resident individuals may elect for the corporation to be taxed similarly to partnerships (see S Corporation). Corporate income tax is based on taxable income, which is defined similarly to individual taxable income.
Shareholders (including other corporations) of corporations (other than S Corporations) are taxed on dividend distributions from the corporation. They are also subject to tax on capital gains upon sale or exchange of their shares for money or property. However, certain exchanges, such as in reorganizations, are not taxable.
Multiple corporations may file a consolidated return at the federal and some state levels with their common parent.
Corporate tax rates
Federal corporate income tax is imposed at graduated rates from 15% to 35%. The lower rate brackets are phased out at higher rates of income, with all income subject to tax at 34% to 35% where taxable income exceeds $335,000. Additional tax rates imposed at the state and local level vary widely by jurisdiction, from under 1% to over 16%. State and local income taxes are allowed as tax deductions in computing federal taxable income.
Deductions for corporations
Corporations are not allowed the personal deductions allowed to individuals, such as deductions for exemptions and the standard deduction. However, most other deductions are allowed. In addition, corporations are allowed certain deductions unique to corporate status. These include a partial deduction for dividends received from other corporations, deductions related to organization costs, and certain other items.
Some deductions of corporations are limited at federal or state levels. Limitations apply to items due to related parties, including interest and royalty expenses.
Estates and trusts
Estates and trusts may be subject to income tax at the estate or trust level, or the beneficiaries may be subject to income tax on their share of income. Where the all income must be distributed, the beneficiaries are taxed similarly to partners in a partnership. Where income may be retained, the estate or trust is taxed. It may get a deduction for later distributions of income. Estates and trusts are allowed only those deductions related to producing income, plus $1,000. They are taxed at graduated rates that increase rapidly to the maximum rate for individuals. The tax rate for trust and estate income in excess of $11,500 was 35% for 2009. Estates and trusts are eligible for the reduced rate of tax on dividends and capital gains through 2011.
Retirement savings and fringe benefit plans
Employers get a deduction for amounts contributed to a qualified employee retirement plan or benefit plan. The employee does not recognize income with respect to the plan until he or she receives a distribution from the plan. The plan itself is organized as a trust and is considered a separate entity. For the plan to qualify for tax exemption, and for the employer to get a deduction, the plan must meet minimum participation, vesting, funding, and operational standards.
Examples of qualified plans include:
Pension plans (defined benefit pension plan),
Profit sharing plans (defined contribution plan),
Employee Stock Ownership Plan (ESOPs),
Stock purchase plans,
Health insurance plans,
Employee benefit plans,
Employees or former employees are generally taxed on distributions from retirement or stock plans. Employees are not taxed on distributions from health insurance plans to pay for medical expenses. Cafeteria plans allow employees to choose among benefits (like choosing food in a cafeteria), and distributions to pay those expenses are not taxable.
In addition, individuals may make contributions to Individual Retirement Accounts (IRAs). Those not currently covered by other retirement plans may claim a deduction for contributions to certain types of IRAs. Income earned within an IRA is not taxed until the individual withdraws it.
Main article: Tax credits
The federal and state systems offer numerous tax credits for individuals and businesses. Among the key federal credits for individuals are:
Child credit: a credit up to $1,000 per qualifying child.
Child and dependent care credit: a credit up to $6,000, phased out at incomes above $15,000.
Earned Income Tax Credit: this refundable credit is granted for a percentage of income earned by a low income individual. The credit is calculated and capped based on the number of qualifying children, if any. This credit is indexed for inflation and phased out for incomes above a certain amount. For 2015, the maximum credit was $6,422.
Credit for the elderly and disabled: A nonrefundable credit up to $1,125
Two mutually exclusive credits for college expenses.
Businesses are also eligible for several credits. These credits are available to individuals and corporations, and can be taken by partners in business partnerships. Among the federal credits included in a "general business credit" are:
Credit for increasing research expenses.
Work Incentive Credit or credit for hiring people in certain enterprise zones or on welfare.
A variety of industry specific credits.
In addition, a federal foreign tax credit is allowed for foreign income taxes paid. This credit is limited to the portion of federal income tax arising due to foreign source income. The credit is available to all taxpayers.
Business credits and the foreign tax credit may be offset taxes in other years.
States and some localities offer a variety of credits that vary by jurisdiction. States typically grant a credit to resident individuals for income taxes paid to other states, generally limited in proportion to income taxed in the other state(s).
Alternative minimum tax
Main article: Alternative Minimum Tax
Taxpayers must pay the higher of the regular income tax or the alternative minimum tax (AMT). Taxpayers who have paid AMT in prior years may claim a credit against regular tax for the prior AMT. The credit is limited so that regular tax is not reduced below current year AMT.
AMT is imposed at a nearly flat rate (20% for corporations, 26% or 28% for individuals, estates, and trusts) on taxable income as modified for AMT. Key differences between regular taxable income and AMT taxable income include:
The standard deduction and personal exemptions are replaced by a single deduction, which is phased out at higher income levels,
No deduction is allowed individuals for state taxes,
Most miscellaneous itemized deductions are not allowed for individuals,
Depreciation deductions are computed differently, and
Corporations must make a complex adjustment to more closely reflect economic income.
Accounting periods and methods
The United States tax system allows individuals and entities to choose their tax year. Most individuals choose the calendar year. There are restrictions on choice of tax year for some closely held entities. Taxpayers may change their tax year in certain circumstances, and such change may require IRS approval.
Taxpayers must determine their taxable income based on their method of accounting for the particular activity. Most individuals use the cash method for all activities. Under this method, income is recognized when received and deductions taken when paid. Taxpayers may choose or be required to use the accrual method for some activities. Under this method, income is recognized when the right to receive it arises, and deductions are taken when the liability to pay arises and the amount can be reasonably determined. Taxpayers recognizing cost of goods sold on inventory must use the accrual method with respect to sales and costs of the inventory.
Methods of accounting may differ for financial reporting and tax purposes. Specific methods are specified for certain types of income or expenses. Gain on sale of property other than inventory may be recognized at the time of sale or over the period in which installment sale payments are received. Income from long term contracts must be recognized ratably over the term of the contract, not just at completion. Other special rules also apply.
Tax exempt entities
Main article: Tax exemption
U.S. tax law exempts certain types of entities from income and some other taxes. These provisions arose during the late 19th century. Charitable organizations and cooperatives may apply to the IRS for tax exemption. Exempt organizations are still taxed on any business income. An organization which participates in lobbying, political campaigning, or certain other activities may lose its exempt status. Special taxes apply to prohibited transactions and activities of tax-exempt entities.
There are many federal tax rules designed to prevent people from abusing the tax system. Provisions related to these taxes are often complex. Such rules include:
Accumulated earnings tax on corporation accumulations in excess of business needs,
Personal holding company taxes,
Passive foreign investment company rules, and
Controlled foreign corporation provisions.
Tax rules recognize that some types of businesses do not earn income in the traditional manner and thus require special provisions. For example, insurance companies must ultimately pay claims to some policy holders from the amounts received as premiums. These claims may happen years after the premium payment. Computing the future amount of claims requires actuarial estimates until claims are actually paid. Thus, recognizing premium income as received and claims expenses as paid would seriously distort an insurance company's income.
Special rules apply to some or all items in the following industries:
Insurance companies (rules related to recognition of income and expense; different rules apply to life insurance and to property and casualty insurance)
Shipping (rules related to the revenue recognition cycle)
Extractive industries (rules related to expenses for exploration and development and for recovery of capitalized costs)
In addition, mutual funds (regulated investment companies) are subject to special rules allowing them to be taxed only at the owner level. The company must report to each owner his/her share of ordinary income, capital gains, and creditable foreign taxes. The owners then include these items in their own tax calculation. The fund itself is not taxed, and distributions are treated as a return of capital to the owners. Similar rules apply to real estate investment trusts and real estate mortgage investment conduits.
Total tax revenue as share of GDP for OECD countries in 2009. The tax burden in the US (black) is relatively small in comparison to other industrialised countries.
See also: International tax, Foreign tax credit, Foreign earned income exclusion, and Foreign Account Tax Compliance Act
The United States imposes tax on all citizens of the United States, including those who are residents of other countries, and U.S. corporations.
Federal income tax is imposed on citizens, residents, and U.S. corporations based on their worldwide income. To mitigate double taxation, a credit is allowed for foreign income taxes. This foreign tax credit is limited to that part of current year tax caused by foreign source income. Determining such part involves determining the source of income and allocating and apportioning deductions to that income. States tax resident individuals and corporations on their worldwide income, but few allow a credit for foreign taxes.
In addition, Federal income tax may be imposed on non-resident non-citizens, including corporations, on U.S. source income. Federal tax applies to interest, dividends, royalties, and certain other income of nonresident aliens and foreign corporations at a flat rate of 30%. This rate is often reduced under tax treaties. Foreign persons are taxed on income from a U.S. business and gains on U.S. realty similarly to U.S. persons. Nonresident aliens who are present in the United States for a period of 183 days in a given year are subject to U.S. capital gains tax on certain net capital gains realized during that year from sources within the United States. The states tax non-resident individuals only on income earned within the state (wages, etc.), and tax individuals and corporations on business income apportioned to the state.
The United States has income tax treaties with over 65 countries. These treaties reduce the chance of double taxation by allowing each country to fully tax its citizens and residents and reducing the amount the other country can tax them. Generally the treaties provide for reduced rates of tax on investment income and limits as to which business income can be taxed. The treaties each define which taxpayers can benefit from the treaty.
Social Insurance taxes
Main article: Federal Insurance Contributions Act tax
The United States social insurance system is funded by a tax similar to an income tax. Social Security tax of 6.2% is imposed on wages paid to employees. The tax is imposed on both the employer and the employee. For 2011 and 2012, the employee tax has been reduced from 6.2% to 4.2%. The maximum amount of wages subject to the tax for 2009, 2010, and 2011 was/is $106,800. This amount is indexed for inflation. A companion Medicare Tax of 1.45% of wages is imposed on employers and employees, with no limitation. A self-employment tax in like amounts (totaling 15.3%, 13.3% for 2011 and 2012) is imposed on self-employed persons.
Withholding of tax
Main article: Tax withholding in the United States
Persons paying wages or making certain payments to foreign persons are required to withhold income tax from such payments. Income tax withholding on wages is based on declarations by employees and tables provided by the IRS. Persons paying interest, dividends, royalties, and certain other amounts to foreign persons must also withhold income tax at a flat rate of 30%. This rate may be reduced by a tax treaty. These withholding requirements also apply to non-U.S. financial institutions. Additional backup withholding provisions apply to some payments of interest or dividends to U.S. persons. The amount of income tax withheld is treated as a payment of tax by the person receiving the payment on which tax was withheld.
Employers and employees must also pay Social Security tax, the employee portion of which is also to be withheld from wages. Withholding of income and Social Security taxes are often referred to as payroll tax.
Individuals (with income above a minimum level), corporations, partnerships, estates, and trusts must file annual reports, called tax returns, with federal and appropriate state tax authorities. These returns vary greatly in complexity level depending on the type of filer and complexity of their affairs. On the return, the taxpayer reports income and deductions, calculates the amount of tax owed, reports payments and credits, and calculates the balance due.
Federal individual, estate, and trust income tax returns are due by April 15 for most taxpayers. Corporate and partnership Federal returns are due two and one half months following the corporation's year end. Tax exempt entity returns are due four and one half months following the entity's year end. All federal returns may be extended, with most extensions available upon merely filing a single page form. Due dates and extension provisions for state and local income tax returns vary.
Income tax returns generally consist of the basic form with attached forms and schedules. Several forms are available for individuals and corporations, depending on complexity and nature of the taxpayer's affairs. Many individuals are able to use the one page Form 1040-EZ, which requires no attachments except wage statements from employers (Forms W-2). Individuals claiming itemized deductions must complete Schedule A. Similar schedules apply for interest (B), dividends (B), business income (C), capital gains (D), farm income (F), and self-employment tax (SE). All taxpayers must file those forms for credits, depreciation, AMT, and other items that apply to them.
Electronic filing of tax returns may be done for taxpayers by registered tax preparers.
If a taxpayer discovers an error on a return, or determines that tax for a year should be different, the taxpayer should file an amended return. These returns constitute claims for refund if taxes are determined to have been overpaid.
People filing tax forms in 1920.
The IRS, state, and local tax authorities may examine a tax return and propose changes. Changes to tax returns may be made with minimal advance involvement by taxpayers, such as changes to wage or dividend income to correct errors. Other examination of returns may require extensive taxpayer involvement, such as an audit by the IRS. These audits often require that taxpayers provide the IRS or other tax authority access to records of income and deductions. Audits of businesses are usually conducted by IRS personnel at the business location.
Changes to returns are subject to appeal by the taxpayer, including going to court. IRS changes are often first issued as proposed adjustments. The taxpayer may agree to the proposal, or may advise the IRS why it disagrees. Proposed adjustments are often resolved by the IRS and taxpayer agreeing to what the adjustment should be. For those adjustments to which agreement is not reached, the IRS issues a 30-day letter advising of the adjustment. The taxpayer may appeal this preliminary assessment within 30 days within the IRS.
The Appeals Division reviews the IRS field team determination and taxpayer arguments, and often proposes a solution that the IRS team and the taxpayer find acceptable. Where agreement is still not reached, the IRS issues an assessment as a notice of deficiency or 90-day letter. The taxpayer then has three choices: file suit in United States Tax Court without paying the tax, pay the tax and sue for refund in regular court, or pay the tax and be done. Recourse to court can be costly and time consuming, but is often successful.
IRS computers routinely make adjustments to correct mechanical errors in returns. In addition, the IRS conducts an extensive document matching computer program that compares taxpayer amounts of wages, interest, dividends, and other items to amounts reported by taxpayers. These programs automatically issue 30-day letters advising of proposed changes. Only a very small percentage of tax returns are actually examined. These are selected by a combination of computer analysis of return information and random sampling. The IRS has long maintained a program to identify patterns on returns most likely to require adjustment.
Procedures for examination by state and local authorities vary by jurisdiction.
Taxpayers are required to pay all taxes owed based on the self-assessed tax returns, as adjusted. The IRS collection process allows taxpayers to in certain circumstances, and provides time payment plans that include interest and a "penalty" that is merely added interest. Where taxpayers do not pay tax owed, the IRS has strong means to enforce collection. These include the ability to levy bank accounts and seize property. Generally, significant advance notice is given before levy or seizure. However, in certain rarely used jeopardy assessments the IRS may immediately seize money and property. The IRS Collection Divisions are responsible for most collection activities.
Statute of limitations
The IRS is precluded from assessing additional tax after a certain period of time. In the case of federal income tax, this period is generally three years from the later of the due date of the original tax return or the date the original return was filed. The IRS has an additional three more years to make changes if the taxpayer has substantially understated gross income. The period under which the IRS may make changes is unlimited in the case of fraud, or in the case of failure to file a return.
Main article: IRS penalties
Taxpayers who fail to file returns, file late, or file returns that are wrong, may be subject to penalties. These penalties vary based on the type of failure. Some penalties are computed like interest, some are fixed amounts, and some are based on other measures. Penalties for filing or paying late are generally based on the amount of tax that should have been paid and the degree of lateness. Penalties for failures related to certain forms are fixed amounts, and vary by form from very small to huge.
Intentional failures, including tax fraud, may result in criminal penalties. These penalties may include jail time or forfeiture of property. Criminal penalties are assessed in coordination with the United States Department of Justice.
Main article: United States income tax (legal history)
See also: Taxation history of the United States
President Abraham Lincoln and the United States Congress introduced in 1861 the first personal income tax in the United States.
Article I, Section 8, Clause 1 of the United States Constitution (the "Taxing and Spending Clause"), specifies Congress's power to impose "Taxes, Duties, Imposts and Excises", but Article I, Section 8 requires that, "Duties, Imposts and Excises shall be uniform throughout the United States."
The Constitution specifically stated Congress' method of imposing direct taxes, by requiring Congress to distribute direct taxes in proportion to each state's population "determined by adding to the whole Number of free Persons, including those bound to Service for a Term of Years, and excluding Indians not taxed, three fifths of all other Persons". It has been argued that head taxes and property taxes (slaves could be taxed as either or both) were likely to be abused, and that they bore no relation to the activities in which the federal government had a legitimate interest. The fourth clause of section 9 therefore specifies that, "No Capitation, or other direct, Tax shall be laid, unless in Proportion to the Census or enumeration herein before directed to be taken."
Taxation was also the subject of Federalist No. 33 penned secretly by the Federalist Alexander Hamilton under the pseudonym Publius. In it, he asserts that the wording of the "Necessary and Proper" clause should serve as guidelines for the legislation of laws regarding taxation. The legislative branch is to be the judge, but any abuse of those powers of judging can be overturned by the people, whether as states or as a larger group.
The courts have generally held that direct taxes are limited to taxes on people (variously called "capitation", "poll tax" or "head tax") and property. All other taxes are commonly referred to as "indirect taxes," because they tax an event, rather than a person or property per se. What seemed to be a straightforward limitation on the power of the legislature based on the subject of the tax proved inexact and unclear when applied to an income tax, which can be arguably viewed either as a direct or an indirect tax.
Early federal income taxes
The first income tax suggested in the United States was during the War of 1812. The idea for the tax was based on the British Tax Act of 1798. The British tax law applied progressive rates to income. The British tax rates ranged from 0.833% on income starting at £60 to 10% on income above £200. The tax proposal was developed in 1814. Because the treaty of Ghent was signed in 1815, ending hostilities and the need for additional revenue, the tax was never imposed in the United States.
In order to help pay for its war effort in the American Civil War, Congress imposed its first personal income tax in 1861. It was part of the Revenue Act of 1861 (3% of all incomes over US $800). This tax was repealed and replaced by another income tax in 1862.
In 1894, Democrats in Congress passed the Wilson-Gorman tariff, which imposed the first peacetime income tax. The rate was 2% on income over $4000, which meant fewer than 10% of households would pay any. The purpose of the income tax was to make up for revenue that would be lost by tariff reductions.
In 1895 the United States Supreme Court, in its ruling in Pollock v. Farmers' Loan & Trust Co., held a tax based on receipts from the use of property to be unconstitutional. The Court held that taxes on rents from real estate, on interest income from personal property and other income from personal property (which includes dividend income) were treated as direct taxes on property, and therefore had to be apportioned (divided among the states based on their populations). Since apportionment of income taxes is impractical, this had the effect of prohibiting a federal tax on income from property. However, the Court affirmed that the Constitution did not deny Congress the power to impose a tax on real and personal property, and it affirmed that such would be a direct tax. Due to the political difficulties of taxing individual wages without taxing income from property, a federal income tax was impractical from the time of the Pollock decision until the time of ratification of the Sixteenth Amendment (below).
Ratification of the Sixteenth Amendment
Main article: Sixteenth Amendment to the United States Constitution
Amendment XVI in the National Archives
In response, Congress proposed the Sixteenth Amendment (ratified by the requisite number of states in 1913), which states:
The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration.
The Supreme Court in Brushaber v. Union Pacific Railroad, 240 U.S. 1 (1916), indicated that the amendment did not expand the federal government's existing power to tax income (meaning profit or gain from any source) but rather removed the possibility of classifying an income tax as a direct tax on the basis of the source of the income. The Amendment removed the need for the income tax to be apportioned among the states on the basis of population. Income taxes are required, however, to abide by the law of geographical uniformity.
Some tax protesters and others opposed to income taxes cite what they contend is evidence that the Sixteenth Amendment was never properly ratified, based in large part on materials sold by William J. Benson. In December 2007, Benson's "Defense Reliance Package" containing his non-ratification argument which he offered for sale on the Internet, was ruled by a federal court to be a "fraud perpetrated by Benson" that had "caused needless confusion and a waste of the customers' and the IRS' time and resources". The court stated: "Benson has failed to point to evidence that would create a genuinely disputed fact regarding whether the Sixteenth Amendment was properly ratified or whether United States Citizens are legally obligated to pay federal taxes." See also Tax protester Sixteenth Amendment arguments.
Modern interpretation of the power to tax incomes
The modern interpretation of the Sixteenth Amendment taxation power can be found in Commissioner v. Glenshaw Glass Co. 348 U.S. 426 (1955). In that case, a taxpayer had received an award of punitive damages from a competitor for antitrust violations and sought to avoid paying taxes on that award. The Court observed that Congress, in imposing the income tax, had defined gross income, under the Internal Revenue Code of 1939, to include:
gains, profits, and income derived from salaries, wages or compensation for personal service ... of whatever kind and in whatever form paid, or from professions, vocations, trades, businesses, commerce, or sales, or dealings in property, whether real or personal, growing out of the ownership or use of or interest in such property; also from interest, rent, dividends, securities, or the transaction of any business carried on for gain or profit, or gains or profits and income derived from any source whatever.:p. 429
(Note: The Glenshaw Glass case was an interpretation of the definition of "gross income" in section 22 of the Internal Revenue Code of 1939. The successor to section 22 of the 1939 Code is section 61 of the current Internal Revenue Code of 1986, as amended.)
The Court held that "this language was used by Congress to exert in this field the full measure of its taxing power", id., and that "the Court has given a liberal construction to this broad phraseology in recognition of the intention of Congress to tax all gains except those specifically exempted.":p. 430
The Court then enunciated what is now understood by Congress and the Courts to be the definition of taxable income, "instances of undeniable accessions to wealth, clearly realized, and over which the taxpayers have complete dominion." Id. at 431. The defendant in that case suggested that a 1954 rewording of the tax code had limited the income that could be taxed, a position which the Court rejected, stating:
The definition of gross income has been simplified, but no effect upon its present broad scope was intended. Certainly punitive damages cannot reasonably be classified as gifts, nor do they come under any other exemption provision in the Code. We would do violence to the plain meaning of the statute and restrict a clear legislative attempt to bring the taxing power to bear upon all receipts constitutionally taxable were we to say that the payments in question here are not gross income.:pp. 432–33
Tax statutes passed after the ratification of the Sixteenth Amendment in 1913 are sometimes referred to as the "modern" tax statutes. Hundreds of Congressional acts have been passed since 1913, as well as several codifications (i.e., topical reorganizations) of the statutes (see Codification).
In Central Illinois Public Service Co. v. United States, 435 U.S. 21 (1978), the U.S. Supreme Court confirmed that wages and income are not identical as far as taxes on income are concerned, because income not only includes wages, but any other gains as well. The Court in that case noted that in enacting taxation legislation, Congress "chose not to return to the inclusive language of the Tariff Act of 1913, but, specifically, 'in the interest of simplicity and ease of administration,' confined the obligation to withhold [income taxes] to 'salaries, wages, and other forms of compensation for personal services'" and that "committee reports ... stated consistently that 'wages' meant remuneration 'if paid for services performed by an employee for his employer'".:p. 27
Other courts have noted this distinction in upholding the taxation not only of wages, but also of personal gain derived from other sources, recognizing some limitation to the reach of income taxation. For example, in Conner v. United States, 303 F. Supp. 1187 (S.D. Tex. 1969), aff'd in part and rev'd in part, 439 F.2d 974 (5th C