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Taxes are mandatory contributions levied on individuals or corporations by a government entity—whether local, regional or national. Payroll tax—a percentage withheld from an employee’s pay by an employer, who pays it to the government on the employee’s behalf to fund Medicare and Social Security programs Corporate tax—a percentage of corporate profits taken as tax by the government to fund federal programs Sales tax—taxes levied on certain goods and services; varies by jurisdiction Property tax—based on the value of land and property assets Tariff—taxes on imported goods; imposed in the aim of strengthening internal businesses Estate tax—rate applied to the fair market value of property in a person’s estate at the time of death; total estate must exceed thresholds set by state and federal governments Generally speaking, the federal government levies income, corporate, and payroll taxes; the state levies income and sales taxes; and municipalities or other local governments mainly levy property taxes. From an accounting perspective, there are various taxes to consider, including payroll taxes, federal and state income taxes, and sales taxes.

Taxes are mandatory contributions collected by governments.

What Are Taxes?

Taxes are mandatory contributions levied on individuals or corporations by a government entity — whether local, regional or national. Tax revenues finance government activities, including public works and services such as roads and schools, or programs such as Social Security and Medicare. In economics, taxes fall on whomever pays the burden of the tax, whether this is the entity being taxed, such as a business, or the end consumers of the business’s goods.

From an accounting perspective, there are various taxes to consider, including payroll taxes, federal and state income taxes, and sales taxes.

Understanding Taxes

To help fund public works and services — and to build and maintain the infrastructure used in a country — a government usually taxes its individual and corporate residents. The tax collected is used for the betterment of the economy and all who are living in it. In the United States and many other countries in the world, income taxes are applied to some form of money received by a taxpayer. The money could be income earned from salary, capital gains from investment appreciation, dividends or interest received as additional income, payment made for goods and services, etc.

Tax revenues are used for public services and the operation of the government, as well as for Social Security and Medicare. As baby boomer populations have aged, Social Security and Medicare have claimed increasingly high proportions of the total federal expenditure of tax revenue. Throughout U.S. history, tax policy has been a consistent source of political debate.

A tax requires a percentage of the taxpayer’s earnings or money to be taken and remitted to the government. Payment of taxes at rates levied by the government is compulsory, and tax evasion — the deliberate failure to pay one’s full tax liabilities — is punishable by law. (On the other hand, tax avoidance — actions taken to lessen your tax liability and maximize after-tax income — is perfectly legal.) Most governments use an agency or department to collect taxes. In the United States, this function is performed federally by the Internal Revenue Service (IRS).

There are several very common types of taxes:

Tax systems vary widely among nations, and it is important for individuals and corporations to carefully study a new locale’s tax laws before earning income or doing business there. 

Below, we will take a look at various tax situations in the United States. Generally speaking, the federal government levies income, corporate, and payroll taxes; the state levies income and sales taxes; and municipalities or other local governments mainly levy property taxes.

Income tax

Like many nations, the United States has a progressive income tax system, through which a higher percentage of tax revenues are collected from high-income individuals or corporations than from low-income individual earners. Taxes are applied through marginal tax rates.

A variety of factors affect the marginal tax rate that a taxpayer will pay, including their filing status — married filing jointly, married filing separately, single, or head of household. Which status a person files can make a significant difference in how much they are taxed. The source of a taxpayer’s income also makes a difference in taxation. It’s important to learn the terminology of the different income types that may affect how income is taxed.

Capital gains taxes are of particular relevance for investors. Levied and enforced at the federal level, these are taxes on income from the sale of assets in which the sale price was higher than the purchasing price. These are taxed at both short- and long-term rates. Short-term capital gains (on assets sold one year or less after they were acquired) are taxed at the owner’s ordinary income tax rate, but long-term gains on assets held for more than a year are taxed at a lower capital gains rate, on the rationale that lower taxes will encourage high levels of capital investment. Tax records should be maintained to substantiate the length of ownership when both the assets were sold and the tax return was filed.

Payroll taxes

Payroll taxes are withheld from an employee’s paycheck by an employer, who remits the amount to the federal government to fund Medicare and Social Security programs. Employees pay 6.2% into Social Security on the first $142,800 earned (the wage base limit for 2021) and 1.45% into Medicare on all wages. Because there is a cap on wages subject to the Social Security portion of the payroll tax, it is considered to be regressive, with higher-paid earners paying a smaller percentage of their total wages.

There is no salary limit for Medicare tax, but anyone who earns more than $200,000 as a single filer (or $250,000 for married couples filing jointly) pays an additional 0.9% into Medicare.

Payroll taxes have both an employee portion and an employer portion. The employer remits both the employee portion, described above, and a duplicate amount for the employer portion. The employer rates are the same 6.2% for Social Security, up to the wage base limit, and 1.45% for Medicare on all wages. Therefore, the total remitted is 15.3% (6.2% employee Social Security + 6.2% employer Social Security + 1.45% employee Medicare + 1.45% employer Medicare).

Payroll taxes and income taxes differ, although both are withheld from an employee’s paycheck and remitted to the government. Payroll taxes are specifically to fund Social Security and Medicare programs. A self-employed individual must pay the equivalent of both the employee and employer portion of payroll taxes through self-employment taxes, which also fund Social Security and Medicare.

Corporate taxes

Corporate taxes are paid on a company’s taxable income. The steps to calculate a company’s taxable income are:

The corporate tax rate in the United States is currently a flat rate of 21%. Before the Tax Cuts and Jobs Act (TCJA) of 2017, the corporate tax rate was 35%.

Sales taxes

Sales taxes are charged at the point of sale, when a customer executes the payment for a good or service. The business collects the sales tax from the customer and remits the funds to the government. Different jurisdictions charge different sales taxes, which often overlap, as when states, counties, and municipalities each levy their own sales taxes.

As of 2021, the highest average state and local sales tax rate is found in Tennessee, at 9.55%. Five states do not have a state sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. Alaska does allow municipalities to charge local sales tax.

Property taxes

A common property tax in the United States is the real estate ad valorem tax. A millage rate is used to calculate real estate taxes; it represents the amount per every $1,000 of a property’s assessed value. The property’s assessed value is determined by a property assessor appointed by the local government. Reassessments are typically performed every one to five years. Property tax rates vary considerably by jurisdiction. Property taxes can also be assessed on personal property, such as cars or boats.

As of 2018, the state with the highest property tax collections per capita was New Jersey at $3,378. (The District of Columbia would rank higher if it was counted with the 50 states, at $3,740 per capita.) The lowest state ranking was $598 per capita in Alabama.


A tariff is a tax imposed by one country on the goods and services imported from another country. The purpose is to encourage domestic purchases by increasing the price of goods and services imported from other countries.

There are two main types of tariffs: fixed fee tariffs, which are levied as a fixed cost based on the type of item, and ad valorem tariffs, which are assessed as a percentage of the item’s value (like the real estate tax in the previous section).

Tariffs are politically divisive, with debate over whether the policies work as intended.

Estate taxes

Estate taxes are levied only on estates that exceed the exclusion limit set by law. In 2021, the federal exclusion limit is $11.7 million. Surviving spouses are exempt from estate taxes. The estate tax due is the taxable estate minus the exclusion limit. For example, a $14.7 million estate would owe estate taxes on $3 million.

The estate tax rate is a progressive marginal rate that increases drastically from 18% to 40%. The maximum estate tax rate of 40% is levied on the portion of an estate that exceeds the exclusion limit by more than $1 million.

States may have lower exclusion limits than the federal government, but no state taxes estates less than $1 million. Massachusetts and Oregon have the $1 million exemption limits. State rates are also different from the federal rate. The highest top state estate tax rates are in Hawaii and Washington, each at 20%.

Estate taxes are different from inheritance taxes, in that an estate tax is applied before assets are disbursed to any beneficiaries. An inheritance tax is paid by the beneficiary. There is no federal inheritance tax, and only six states have an inheritance tax: Iowa, Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania.

The Bottom Line

There are many types of taxes that are applied in various ways. Understanding what triggers a tax situation can enable taxpayers to manage their finances to minimize the impact of taxes. Techniques that can help include annual tax-loss harvesting, to offset investing gains with investing losses, and estate planning, which works to shelter inherited income for heirs.

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Terms in Taxes

90-Day Letter

90-Day Letter is an IRS notice sent after an audit asserting a discrepancy or error in an individual's taxes and they will be assessed unless petitioned.  read more

Above-the-Line Deduction

An above-the-line deduction is an item that is subtracted from gross income in order to calculate adjusted gross income on the IRS form 1040. read more

Airport Tax

An airport tax is a tax levied on passengers for passing through an airport. Revenue from airport taxes is used for facility maintenance. read more


An assessment occurs when an asset's value must be determined for the purpose of taxation.  read more


An assessor is a local government official trained to determine the fair market value of property for local taxation purposes.  read more

After Tax Operating Income (ATOI)

After-tax operating income (ATOI) is a non-GAAP measure that evaluates a company's total operating income after taxes. read more

At-Risk Rules

At-risk rules are tax laws limiting the amount of losses a taxpayer can claim. Only the amount actually at risk can be deducted. read more

Breakeven Tax Rate

The breakeven tax rate is the tax rate at which it would neither be advantageous nor disadvantageous for a company to conduct a certain transaction. read more

Cash Basis Taxpayer

A cash basis taxpayer is a taxpayer who reports income and deductions in the year that they are actually paid or received. read more

Capital Gains Exposure (CGE)

Capital gains exposure is an assessment of the extent to which a stock fund or other similar investment fund's assets have appreciated or depreciated. read more

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