An income tax is a
tax
A tax is a mandatory financial charge or levy imposed on an individual or legal entity by a governmental organization to support government spending and public expenditures collectively or to regulate and reduce negative externalities. Tax co ...
imposed on individuals or entities (taxpayers) in respect of the
income
Income is the consumption and saving opportunity gained by an entity within a specified timeframe, which is generally expressed in monetary terms. Income is difficult to define conceptually and the definition may be different across fields. F ...
or profits earned by them (commonly called
taxable income
Taxable income refers to the base upon which an income tax system imposes tax. In other words, the income over which the government imposed tax. Generally, it includes some or all items of income and is reduced by expenses and other deductions. T ...
). Income tax generally is computed as the product of a tax rate times the taxable income. Taxation rates may vary by type or characteristics of the taxpayer and the type of income.
The tax rate may increase as taxable income increases (referred to as graduated or
progressive tax
A progressive tax is a tax in which the tax rate increases as the taxable amount increases. The term ''progressive'' refers to the way the tax rate progresses from low to high, with the result that a taxpayer's average tax rate is less than the ...
rates). The tax imposed on companies is usually known as
corporate tax
A corporate tax, also called corporation tax or company tax or corporate income tax, is a type of direct tax levied on the income or capital of corporations and other similar legal entities. The tax is usually imposed at the national level, but ...
and is commonly levied at a flat rate. Individual income is often taxed at progressive rates where the tax rate applied to each additional unit of income increases (e.g., the first $10,000 of income taxed at 0%, the next $10,000 taxed at 1%, etc.). Most jurisdictions exempt local charitable organizations from tax. Income from investments may be taxed at different (generally lower) rates than other types of income. Credits of various sorts may be allowed that reduce tax. Some jurisdictions impose the higher of an income tax or a tax on an alternative base or measure of income.
Taxable income of taxpayers' resident in the jurisdiction is generally total income less income producing expenses and other deductions. Generally, only net gain from the sale of property, including goods held for sale, is included in income. The income of a corporation's shareholders usually includes distributions of profits from the corporation. Deductions typically include all income-producing or business expenses including an allowance for recovery of costs of business assets. Many jurisdictions allow notional deductions for individuals and may allow deduction of some personal expenses. Most jurisdictions either do not tax income earned outside the jurisdiction or allow a credit for taxes paid to other jurisdictions on such income. Nonresidents are taxed only on certain types of income from sources within the jurisdictions, with few exceptions.
Most jurisdictions require self-assessment of the tax and require payers of some types of income to withhold tax from those payments. Advance payments of tax by taxpayers may be required. Taxpayers not timely paying tax owed are generally subject to significant penalties, which may include jail-time for individuals.
Taxable income of taxpayers resident in the jurisdiction is generally total income less income producing expenses and other deductions. Generally, only net gain from the sale of property, including goods held for sale, is included in income. The income of a corporation's shareholders usually includes distributions of profits from the corporation. Deductions typically include all income-producing or business expenses including an allowance for recovery of costs of business assets. Many jurisdictions allow notional deductions for individuals and may allow deduction of some personal expenses. Most jurisdictions either do not tax income earned outside the jurisdiction or allow a credit for taxes paid to other jurisdictions on such income. Nonresidents are taxed only on certain types of income from sources within the jurisdictions, with few exceptions.
History
The concept of taxing income is a modern innovation and presupposes several things: a
money
Money is any item or verifiable record that is generally accepted as payment for goods and services and repayment of debts, such as taxes, in a particular country or socio-economic context. The primary functions which distinguish money are: m ...
economy
An economy is an area of the Production (economics), production, Distribution (economics), distribution and trade, as well as Consumption (economics), consumption of Goods (economics), goods and Service (economics), services. In general, it is ...
, reasonably accurate
accounts, a common understanding of receipts, expenses and
profits, and an orderly society with reliable records.
For most of the history of
civilization
A civilization (also spelled civilisation in British English) is any complex society characterized by the development of state (polity), the state, social stratification, urban area, urbanization, and symbolic systems of communication beyon ...
, these preconditions did not exist, and taxes were based on other factors. Taxes on
wealth
Wealth is the abundance of valuable financial assets or physical possessions which can be converted into a form that can be used for transactions. This includes the core meaning as held in the originating Old English word , which is from an ...
, social position, and ownership of the
means of production
In political philosophy, the means of production refers to the generally necessary assets and resources that enable a society to engage in production. While the exact resources encompassed in the term may vary, it is widely agreed to include the ...
(typically
land
Land, also known as dry land, ground, or earth, is the solid terrestrial surface of Earth not submerged by the ocean or another body of water. It makes up 29.2% of Earth's surface and includes all continents and islands. Earth's land sur ...
and
slaves
Slavery is the ownership of a person as property, especially in regards to their labour. Slavery typically involves compulsory work, with the slave's location of work and residence dictated by the party that holds them in bondage. Enslavemen ...
) were all common. Practices such as
tithing
A tithing or tything was a historic English legal, administrative or territorial unit, originally ten hides (and hence, one tenth of a hundred). Tithings later came to be seen as subdivisions of a manor or civil parish. The tithing's leader or ...
, or an offering of
first fruits, existed from ancient times, and can be regarded as a precursor of the income tax, but they lacked precision and certainly were not based on a concept of net increase.
Early examples
In 9 CE, Emperor
Wang Mang
Wang Mang (45 BCE6 October 23 CE), courtesy name Jujun, officially known as the Shijianguo Emperor (), was the founder and the only emperor of the short-lived Chinese Xin dynasty. He was originally an official and consort kin of the ...
of the
Xin dynasty
The Xin dynasty (; ), also known as Xin Mang () in Chinese historiography, was a short-lived Dynasties in Chinese history, Chinese imperial dynasty which lasted from 9 to 23 AD, established by the Han dynasty consort kin Wang Mang, who usurped th ...
(9 to 23 CE) established the first income
tax
A tax is a mandatory financial charge or levy imposed on an individual or legal entity by a governmental organization to support government spending and public expenditures collectively or to regulate and reduce negative externalities. Tax co ...
through a 10% tax of net earnings from wild herb and fruit collection, fishing, shepherding, and various nonagricultural activities and forms of trading.
People were obligated to report their taxes to the government and officials would audit these reports.
The penalty for evading this tax was one year of hard labor and confiscation of the entirety of a person's property.
Because it caused popular discontent, this income tax was abolished in 22 CE.
In the early days of the
Roman Republic
The Roman Republic ( ) was the era of Ancient Rome, classical Roman civilisation beginning with Overthrow of the Roman monarchy, the overthrow of the Roman Kingdom (traditionally dated to 509 BC) and ending in 27 BC with the establis ...
, public taxes consisted of modest assessments on owned wealth and property. The tax rate under normal circumstances was 1% and sometimes would climb as high as 3% in situations such as war. These modest taxes were levied against land, homes and other real estate, slaves, animals, personal items and monetary wealth. The more a person had in property, the more tax they paid. Taxes were collected from individuals.
One of the first recorded taxes on income was the
Saladin tithe
The Saladin tithe, or the Aid of 1188, was a tax (more specifically a '' tallage'') levied in England and, to some extent, France, in 1188, in response to the capture of Jerusalem by Saladin in 1187.
Background
In July 1187, the Kingdom of Jerusa ...
introduced by
Henry II
Henry II may refer to:
Kings
* Saint Henry II, Holy Roman Emperor (972–1024), crowned King of Germany in 1002, of Italy in 1004 and Emperor in 1014
*Henry II of England (1133–89), reigned from 1154
*Henry II of Jerusalem and Cyprus (1271–1 ...
in 1188 to raise money for the
Third Crusade
The Third Crusade (1189–1192) was an attempt led by King Philip II of France, King Richard I of England and Emperor Frederick Barbarossa to reconquer the Holy Land following the capture of Jerusalem by the Ayyubid sultan Saladin in 1187. F ...
. The tithe demanded that each layperson in
England and Wales
England and Wales () is one of the Law of the United Kingdom#Legal jurisdictions, three legal jurisdictions of the United Kingdom. It covers the constituent countries England and Wales and was formed by the Laws in Wales Acts 1535 and 1542. Th ...
be taxed one tenth of their personal income and moveable property.
In 1641, Portugal introduced a personal income tax called the ''décima''.
Modern era
United Kingdom
The inception date of the modern income tax is typically accepted as 1799, at the suggestion of
Henry Beeke
Henry Beeke (6 January 1751 – 9 March 1837) was an English historian, theologian, writer on taxation and finance, and botanist. He is credited with helping to introduce the world's first modern income tax.
Career
Beeke was elected a scholar o ...
, the future
Dean of Bristol
The Dean of Bristol is the head of the Chapter of the Cathedral Church of the Holy and Undivided Trinity, Bristol, England. The Dean is Mandy Ford, since her installation on 3 October 2020.
List of deans
Early modern
*1542–1551 William Sn ...
.
This income tax was introduced into
Great Britain
Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...
by
Prime Minister
A prime minister or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. A prime minister is not the head of state, but r ...
William Pitt the Younger
William Pitt (28 May 1759 – 23 January 1806) was a British statesman who served as the last prime minister of Kingdom of Great Britain, Great Britain from 1783 until the Acts of Union 1800, and then first Prime Minister of the United Kingdom, p ...
in his budget of December 1798, to pay for weapons and equipment for the
French Revolutionary War
The French Revolutionary Wars () were a series of sweeping military conflicts resulting from the French Revolution that lasted from 1792 until 1802. They pitted France against Great Britain, Austria, Prussia, Russia, and several other countries ...
.
Pitt's new graduated (progressive) income tax began at a levy of 2
old pence
The British pre-decimal penny was a denomination of sterling coinage worth of one pound or of one shilling. Its symbol was ''d'', from the Roman denarius. It was a continuation of the earlier English penny, and in Scotland it had the same ...
in the
pound () on incomes over £60 (equivalent to £ in ), and increased up to a maximum of 2
shilling
The shilling is a historical coin, and the name of a unit of modern currency, currencies formerly used in the United Kingdom, Australia, New Zealand, other British Commonwealth countries and Ireland, where they were generally equivalent to 1 ...
s in the pound (10%) on incomes of over £200. Pitt hoped that the new income tax would raise £10 million a year, but actual receipts for 1799 totalled only a little over £6 million.
Pitt's income tax was levied from 1799 to 1802, when it was abolished by
Henry Addington
Henry Addington, 1st Viscount Sidmouth (30 May 175715 February 1844) was a British Tories (British political party), Tory statesman who served as prime minister of the United Kingdom from 1801 to 1804 and as Speaker of the House of Commons (U ...
during the
Peace of Amiens
The Treaty of Amiens (, ) temporarily ended hostilities between France, the Spanish Empire, and the United Kingdom at the end of the War of the Second Coalition. It marked the end of the French Revolutionary Wars; after a short peace it set t ...
. Addington had taken over as
prime minister
A prime minister or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. A prime minister is not the head of state, but r ...
in 1801, after Pitt's resignation over
Catholic Emancipation. The income tax was reintroduced by Addington in 1803 when hostilities with France recommenced, but it was again abolished in 1816, one year after the
Battle of Waterloo
The Battle of Waterloo was fought on Sunday 18 June 1815, near Waterloo, Belgium, Waterloo (then in the United Kingdom of the Netherlands, now in Belgium), marking the end of the Napoleonic Wars. The French Imperial Army (1804–1815), Frenc ...
. Opponents of the tax, who thought it should only be used to finance wars, wanted all records of the tax destroyed along with its repeal. Records were publicly burned by the
Chancellor of the Exchequer
The chancellor of the exchequer, often abbreviated to chancellor, is a senior minister of the Crown within the Government of the United Kingdom, and the head of HM Treasury, His Majesty's Treasury. As one of the four Great Offices of State, t ...
, but copies were retained in the basement of the tax court.
In the
United Kingdom of Great Britain and Ireland
The United Kingdom of Great Britain and Ireland was the union of the Kingdom of Great Britain and the Kingdom of Ireland into one sovereign state, established by the Acts of Union 1800, Acts of Union in 1801. It continued in this form until ...
, income tax was reintroduced by
Sir Robert Peel by the
Income Tax Act 1842. Peel, as a
Conservative
Conservatism is a cultural, social, and political philosophy and ideology that seeks to promote and preserve traditional institutions, customs, and values. The central tenets of conservatism may vary in relation to the culture and civiliza ...
, had opposed income tax in the
1841 general election, but a growing budget deficit required a new source of funds. The new income tax, based on Addington's model, was imposed on incomes above £150 (equivalent to £ in ). Although this measure was initially intended to be temporary, it soon became a fixture of the British taxation system.
A committee was formed in 1851 under
Joseph Hume
Joseph Hume Fellow of the Royal Society, FRS (22 January 1777 – 20 February 1855) was a Scottish surgeon and Radicals (UK), Radical Member of Parliament (United Kingdom), MP.Ronald K. Huch, Paul R. Ziegler 1985 Joseph Hume, the People's M.P ...
to investigate the matter, but failed to reach a clear recommendation. Despite the vociferous objection,
William Gladstone
William Ewart Gladstone ( ; 29 December 1809 – 19 May 1898) was a British politican, starting as Conservative MP for Newark and later becoming the leader of the Liberal Party.
In a career lasting over 60 years, he was Prime Minister ...
,
Chancellor of the Exchequer
The chancellor of the exchequer, often abbreviated to chancellor, is a senior minister of the Crown within the Government of the United Kingdom, and the head of HM Treasury, His Majesty's Treasury. As one of the four Great Offices of State, t ...
from 1852, kept the progressive income tax, and extended it to cover the costs of the
Crimean War
The Crimean War was fought between the Russian Empire and an alliance of the Ottoman Empire, the Second French Empire, the United Kingdom of Great Britain and Ireland, and the Kingdom of Sardinia (1720–1861), Kingdom of Sardinia-Piedmont fro ...
. By the 1860s, the progressive tax had become a grudgingly accepted element of the United Kingdom fiscal system.
United States
The
US federal government
The Federal Government of the United States of America (U.S. federal government or U.S. government) is the national government of the United States.
The U.S. federal government is composed of three distinct branches: legislative, execut ...
imposed the first personal income tax on
August 5, 1861, to help pay for its war effort in the
American Civil War
The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...
(3% of all incomes over US$800) (equivalent to $ in ).
[Revenue Act of 1861, sec. 49, ch. 45, 12 Stat. 292, 309 (August 5, 1861).] This tax was repealed and replaced by another income tax in 1862. It was only in 1894 that the first peacetime income tax was passed through the
Wilson-Gorman tariff. The rate was 2% on income over $4000 (equivalent to $ in ), 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. The US Supreme Court ruled the income tax
unconstitutional
In constitutional law, constitutionality is said to be the condition of acting in accordance with an applicable constitution; "Webster On Line" the status of a law, a procedure, or an act's accordance with the laws or set forth in the applic ...
, the 10th amendment forbidding any powers not expressed in the US Constitution, and there being no power to impose any other than a direct tax by apportionment.
In 1913, the
Sixteenth Amendment to the United States Constitution
The Sixteenth Amendment (Amendment XVI) to the United States Constitution allows Congress to levy an income tax without apportioning it among the states on the basis of population. It was passed by Congress in 1909 in response to the 1895 ...
cleared the unconstitutionality obstacle which previously had not allowed for the implementation of a federal income tax before 1913 in the United States. In fiscal year 1918, annual internal revenue collections for the first time passed the billion-dollar mark, rising to $5.4 billion by 1920.
The amount of income collected via income tax has varied dramatically, from 1% for the lowest bracket in the early days of US income tax to taxation rates of over 90% for the highest bracket during
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
.
Timeline of introduction of income tax by country
* 1799–1802:
* 1803–1816:
* 1840:
* 1842:
* 1860:
* 1861–1872:
* 1864:
* 1872:
* 1887:
* 1891: , at the time a
colony
A colony is a territory subject to a form of foreign rule, which rules the territory and its indigenous peoples separated from the foreign rulers, the colonizer, and their ''metropole'' (or "mother country"). This separated rule was often orga ...
of the United Kingdom
* 1894–95:
* 1900:
* 1903: ,
* 1908:
* 1911:
* 1913:
* 1916: ,
* 1918:
* 1919:
* 1920: ,
* 1921:
* 1924: ,
* 1932: ,
* 1934:
* 1937:
* 1942:
* 1979:
* 2007:
Common principles
While tax rules vary widely, certain basic principles are common to most income tax systems. Tax systems in Canada, China,
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
,
Singapore
Singapore, officially the Republic of Singapore, is an island country and city-state in Southeast Asia. The country's territory comprises one main island, 63 satellite islands and islets, and one outlying islet. It is about one degree ...
, the United Kingdom, and the United States, among others, follow most of the principles outlined below. Some tax systems, such as
India
India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
, may have significant differences from the principles outlined below. Most references below are examples; see specific articles by jurisdiction (''e.g.'',
Income tax in Australia
Income is the consumption and saving opportunity gained by an entity within a specified timeframe, which is generally expressed in monetary terms. Income is difficult to define conceptually and the definition may be different across fields. F ...
).
Taxpayers and rates
Individuals are often taxed at different rates than corporations. Individuals include only human beings. Tax systems in countries other than
the US treat an entity as a corporation only if it is legally organized as a corporation. Estates and trusts are usually subject to special tax provisions. Other taxable entities are generally treated as partnerships. In the US, many kinds of entities may elect to be treated as a corporation or a partnership. Partners of partnerships are treated as having income, deductions, and credits equal to their shares of such partnership items.
Separate taxes are assessed against each taxpayer meeting certain minimum criteria. Many systems allow married individuals to request
joint assessment. Many systems allow
controlled groups of locally organized corporations to be jointly assessed.
Tax rates vary widely. Some systems impose
higher rates on higher amounts of income. Tax rates schedules may vary for individuals based on marital status. In India on the other hand there is a slab rate system, where for income below INR 2.5 lakhs per annum the tax is zero percent, for those with their income in the slab rate of INR 2,50,001 to INR 5,00,000 the tax rate is 5%. In this way the rate goes up with each slab, reaching to 30% tax rate for those with income above INR 15,00,000.
Residents and non-residents
Residents are generally taxed differently from non-residents. Few jurisdictions tax non-residents other than on specific types of income earned within the jurisdiction. See, ''e.g.'', the discussion of taxation by
the United States of foreign persons. Residents, however, are generally subject to income tax on all worldwide income. A handful of jurisdictions (notably
Singapore
Singapore, officially the Republic of Singapore, is an island country and city-state in Southeast Asia. The country's territory comprises one main island, 63 satellite islands and islets, and one outlying islet. It is about one degree ...
and Hong Kong) tax residents only on income earned in or remitted to the jurisdiction. There may arise a situation where the tax payer has to pay tax in one jurisdiction he or she is tax resident and also pay tax to other country where he or she is non-resident. This creates the situation of Double taxation which needs assessment of Double Taxation Avoidance Agreement entered by the jurisdictions where the tax payer is assessed as resident and non-resident for the same transaction.
Residence is often defined for individuals as presence in the jurisdiction for more than 183 days. Most jurisdictions base residence of entities on either place of organization or place of management and control.
Defining income
Most systems define income subject to tax broadly for residents, but tax nonresidents only on specific types of income. What is included in income for individuals may differ from what is included for entities. The timing of recognizing income may differ by type of taxpayer or type of income.
Income generally includes most types of receipts that enrich the taxpayer, including compensation for services, gain from sale of goods or other property, interest, dividends, rents, royalties, annuities, pensions, and all manner of other items. Many systems exclude from income part or all of
superannuation
A pension (; ) is a fund into which amounts are paid regularly during an individual's working career, and from which periodic payments are made to support the person's retirement from work. A pension may be either a "Defined benefit pension pla ...
or other national retirement plan payments. Most tax systems exclude from income health care benefits provided by employers or under national insurance systems.
Deductions allowed
Nearly all income tax systems permit residents to reduce gross income by business and some other types of deductions. By contrast, nonresidents are generally subject to income tax on the gross amount of income of most types plus the net business income earned within the jurisdiction.
Expenses incurred in a trading, business, rental, or other income producing activity are generally deductible, though there may be limitations on some types of expenses or activities. Business expenses include all manner of costs for the benefit of the activity. An allowance (as a capital allowance or depreciation deduction) is nearly always allowed for recovery of costs of assets used in the activity. Rules on capital allowances vary widely, and often permit recovery of costs more quickly than ratably over the life of the asset.
Most systems allow individuals some sort of
notional deductions or an amount subject to zero tax. In addition, many systems allow deduction of some types of personal expenses, such as home mortgage interest or medical expenses.
Business profits
Only net income from business activities, whether conducted by individuals or entities is taxable, with few exceptions. Many countries require business enterprises to prepare financial statements which must be audited. Tax systems in those countries often define taxable income as income per those financial statements with few, if any, adjustments. A few jurisdictions compute net income as a fixed percentage of gross revenues for some types of businesses, particularly branches of nonresidents.
Credits
Nearly all systems permit residents a
credit
Credit (from Latin verb ''credit'', meaning "one believes") is the trust which allows one party to provide money or resources to another party wherein the second party does not reimburse the first party immediately (thereby generating a debt) ...
for income taxes paid to other jurisdictions of the same sort. Thus, a credit is allowed at the national level for income taxes paid to other countries. Many income tax systems permit other credits of various sorts, and such credits are often unique to the jurisdiction.
Alternative taxes
Some jurisdictions, particularly the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
and many of its
states
State most commonly refers to:
* State (polity), a centralized political organization that regulates law and society within a territory
**Sovereign state, a sovereign polity in international law, commonly referred to as a country
**Nation state, a ...
and
Switzerland
Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...
, impose the higher of regular income tax or an alternative tax. Switzerland and U.S. states generally impose such tax only on corporations and base it on capital or a similar measure.
Administration
Income tax is generally collected in one of two ways: through
withholding
Tax withholding, also known as tax retention, pay-as-you-earn tax or tax deduction at source, is income tax paid to the government by the payer of the income rather than by the recipient of the income. The tax is thus withheld or deducted from the ...
of tax at source and/or through payments directly by taxpayers. Nearly all jurisdictions require those paying employees or nonresidents to withhold income tax from such payments. The amount to be withheld is a fixed percentage where the tax itself is at a fixed rate. Alternatively, the amount to be withheld may be determined by the tax administration of the country or by the payer using formulas provided by the tax administration. Payees are generally required to provide to the payer or the government the information needed to make the determinations. Withholding for employees is often referred to as "pay as you earn" (
PAYE
A pay-as-you-earn tax (PAYE), or pay-as-you-go (PAYG) is a withholding of taxes on income payments to employees. Amounts withheld are treated as advance payments of income tax due. They are refundable to the extent they exceed tax as determined ...
) or "pay as you go."
Income taxes of workers are often collected by employers under a
withholding
Tax withholding, also known as tax retention, pay-as-you-earn tax or tax deduction at source, is income tax paid to the government by the payer of the income rather than by the recipient of the income. The tax is thus withheld or deducted from the ...
or
pay-as-you-earn tax
A pay-as-you-earn tax (PAYE), or pay-as-you-go (PAYG) is a withholding of taxes on income payments to employees. Amounts withheld are treated as advance payments of income tax due. They are refundable to the extent they exceed tax as determined ...
system. Such collections are not necessarily final amounts of tax, as the worker may be required to aggregate wage income with other income and/or deductions to determine actual tax. Calculation of the tax to be withheld may be done by the government or by employers based on withholding allowances or formulas.
Nearly all systems require those whose proper tax is not fully settled through withholding to self-assess tax and make payments prior to or with final determination of the tax. Self-assessment means the taxpayer must make a computation of tax and submit it to the government. Some countries provide a pre-computed estimate to taxpayers, which the taxpayer can correct as necessary.
The proportion of people who pay their income taxes in full, on time, and voluntarily (that is, without being fined or ordered to pay more by the government) is called the
voluntary compliance rate.
The voluntary compliance rate is higher in the US than in countries like Germany or Italy.
In countries with a sizeable
black market
A black market is a Secrecy, clandestine Market (economics), market or series of transactions that has some aspect of illegality, or is not compliant with an institutional set of rules. If the rule defines the set of goods and services who ...
, the voluntary compliance rate is very low and may be impossible to properly calculate.
State, provincial, and local
Income taxes are separately imposed by sub-national jurisdictions in several countries with federal systems. These include
Canada
Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
,
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
, Switzerland, and the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
, where provinces, cantons, or states impose separate taxes. In a few countries, cities also impose income taxes. The system may be integrated (as in Germany) with taxes collected at the federal level. In
Quebec
Quebec is Canada's List of Canadian provinces and territories by area, largest province by area. Located in Central Canada, the province shares borders with the provinces of Ontario to the west, Newfoundland and Labrador to the northeast, ...
and the United States, federal and state systems are independently administered and have differences in determination of taxable income.
Wage-based taxes
Retirement oriented taxes, such as
Social Security
Welfare spending is a type of government support intended to ensure that members of a society can meet basic human needs such as food and shelter. Social security may either be synonymous with welfare, or refer specifically to social insurance ...
or
national insurance
National Insurance (NI) is a fundamental component of the welfare state in the United Kingdom. It acts as a form of social security, since payment of NI contributions establishes entitlement to certain state benefits for workers and their famil ...
, also are a type of income tax, though not generally referred to as such. In the US, these taxes generally are imposed at a fixed rate on wages or self-employment earnings up to a maximum amount per year. The tax may be imposed on the employer, the employee, or both, at the same or different rates.
Some jurisdictions also impose a tax collected from employers, to fund unemployment insurance, health care, or similar government outlays.
Economic and policy aspects

Multiple conflicting theories have been proposed regarding the economic impact of income taxes. Income taxes are widely viewed as a
progressive tax
A progressive tax is a tax in which the tax rate increases as the taxable amount increases. The term ''progressive'' refers to the way the tax rate progresses from low to high, with the result that a taxpayer's average tax rate is less than the ...
(the incidence of tax increases as income increases).
Some studies have suggested that an income tax does not have much effect on the numbers of hours worked.
Criticisms
Tax avoidance
Tax avoidance is the legal usage of the tax regime in a single territory to one's own advantage to reduce the amount of tax that is payable. A tax shelter is one type of tax avoidance, and tax havens are jurisdictions that facilitate reduced taxe ...
strategies and loopholes tend to emerge within income tax codes. They get created when taxpayers find legal methods to avoid paying taxes.
Lawmakers then attempt to close the loopholes with additional legislation. That leads to a
vicious cycle
A vicious circle (or cycle) is a complex chain of events that reinforces itself through a feedback loop, with detrimental results. It is a system with no tendency toward equilibrium (social, economic, ecological, etc.), at least in the short ...
of ever more complex avoidance strategies and legislation. The vicious cycle tends to benefit large corporations and wealthy individuals that can afford the professional fees that come with ever more sophisticated tax planning, thus challenging the notion that even a marginal income tax system can be properly called progressive.
The higher costs to labour and capital imposed by income tax causes
dead weight loss in an economy, being the loss of economic activity from people deciding not to invest capital or use time productively because of the burden that tax would impose on those activities. There is also a loss from individuals and professional advisors devoting time to tax-avoiding behaviour instead of economically productive activities.
Bracket creep
''
Bracket creep
Bracket creep is usually defined as the process by which inflation pushes wages and salaries into higher tax brackets, leading to fiscal drag. However, even if there is only one tax bracket, or one remains within the same tax bracket, there wil ...
'' is usually defined as the process by which
inflation
In economics, inflation is an increase in the average price of goods and services in terms of money. This increase is measured using a price index, typically a consumer price index (CPI). When the general price level rises, each unit of curre ...
pushes wages and salaries into higher
tax bracket
Tax brackets are the divisions at which tax rates change in a progressive tax system (or an explicitly regressive tax system, though that is rarer). Essentially, tax brackets are the cutoff values for taxable income—income past a certain poin ...
s, leading to
fiscal drag
Fiscal drag happens when the government's net fiscal position (spending minus taxation) fails to cover the net savings desires of the private economy, also called the private economy's spending gap (earnings minus spending and private investment). ...
.
However, even if there is only one tax bracket, or one remains within the same tax bracket, there will still be bracket creep resulting in a higher proportion of income being paid in tax. That is, although the marginal tax rate remains unchanged with inflation, the average tax rate will increase.
Most
progressive tax systems are not adjusted for inflation. As wages and salaries rise in nominal terms under the influence of inflation they become more highly taxed, even though in real terms the value of the wages and salaries has not increased at all. The net effect is that in real terms taxes rise unless the tax rates or brackets are adjusted to compensate.
Types of income
Many types of income are subject to income tax, which is very variable. It all depends on the country and its tax laws. In general, countries impose taxes on income from wages, salaries, interest, dividends, and rental income. The most typical ones are wage and salary, which are almost always subject to taxation withheld by employers. Some one-time payments such as bonuses paid to employees are taxable. Dividends and interest (stocks or bonds) are usually also taxed.
There is a very wide variation in the amount of taxation in different countries. For example, countries such as Singapore, Belgium and United Arab Emirates levy low income tax on interest and dividends, while countries such as Denmark, France and United States have very high income tax for this type of income. For profits that are earned by selling assets or a real estate (capital gains), the income tax varies between countries, and is different from for any other types of income. Rental income may also sometimes be subject to income tax, but many countries offer deductions or even exemptions for this type of income.
Around the world

Income taxes are used in most countries around the world. The tax systems vary greatly and can consist of
a flat fixed rate,
progressive, or
regressive, structures depending on the type of tax. Comparison of tax rates around the world is a difficult and somewhat subjective enterprise. Tax laws in most countries are extremely complex, and tax burden falls differently on different groups in each country and sub-national unit. Of course, services provided by governments in return for taxation also vary, making comparisons all the more difficult.
Countries that tax income generally use one of two systems: territorial or residential. In the territorial system, only local income – income from a source inside the country – is taxed. In the residential system,
tax resident
The criteria for residence for tax purposes vary considerably from jurisdiction to jurisdiction, and "residence" can be different for other, non-tax purposes. For individuals, physical presence in a jurisdiction is the main test. Some jurisdictio ...
s of the country are taxed on their worldwide (local and foreign) income, while non-residents are taxed only on their local income. In addition, a very small number of countries, notably the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
, also tax their non-resident citizens on worldwide income.
Countries with a residential system of taxation usually allow deductions or credits for the tax that residents already pay to other countries on their foreign income. Many countries also sign
tax treaties
A tax treaty, also called double tax agreement (DTA) or double tax avoidance agreement (DTAA), is an agreement between two countries to avoid or mitigate double taxation. Such treaties may cover a range of taxes including income taxes, inheritance ...
with each other to eliminate or reduce
double taxation
Double taxation is the levying of tax by two or more jurisdictions on the same income (in the case of income taxes), asset (in the case of capital taxes), or financial transaction (in the case of sales taxes).
Double liability may be mitigated ...
.
Countries do not necessarily use the same system of taxation for individuals and corporations. For example, France uses a residential system for individuals but a territorial system for corporations, while
Singapore
Singapore, officially the Republic of Singapore, is an island country and city-state in Southeast Asia. The country's territory comprises one main island, 63 satellite islands and islets, and one outlying islet. It is about one degree ...
does the opposite, and Brunei taxes corporate but not personal income.
Transparency and public disclosure
Public disclosure of personal income tax filings occurs in
Finland
Finland, officially the Republic of Finland, is a Nordic country in Northern Europe. It borders Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bothnia to the west and the Gulf of Finland to the south, ...
,
Norway
Norway, officially the Kingdom of Norway, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. The remote Arctic island of Jan Mayen and the archipelago of Svalbard also form part of the Kingdom of ...
and
Sweden
Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...
(as of the late-2000s and early 2010s).
In Sweden this information has been published in the annual directory ''
Taxeringskalendern'' since 1905.
See also
*
*
Wealth tax
A wealth tax (also called a capital tax or equity tax) is a tax on an entity's holdings of assets or an entity's net worth. This includes the total value of personal assets, including cash, bank deposits, real estate, assets in insurance and ...
Explanatory notes
References
External links
What Is Income Tax Return (ITR) In India*
ttp://www.ekathimerini.com/4dcgi/_w_articles_wsite2_1_05/11/2013_526451 Greece - State collected less than half of revenues due last yearTHE EFFECT OF PUBLIC DISCLOSURE ON REPORTED TAXABLE INCOME: EVIDENCE FROM INDIVIDUALS AND CORPORATIONS IN JAPAN
{{Authority control
Personal taxes