what is a payroll tax

A payroll tax is a percentage withheld from an employee’s pay by an employer who pays it to the government on the employee’s behalf. The tax is based on wages, salaries, and tips paid to employees. Federal payroll taxes are deducted directly from the employee’s earnings and paid to the Internal Revenue Service (IRS).1


  • Payroll taxes are withheld from every employee’s salary and remitted to the federal government.1
  • In the U.S., payroll taxes are used to fund Social Security and Medicare.1
  • Payroll taxes are used for specific programs. Income taxes go into the government’s general fund.

Understanding Payroll Taxes

The term federal payroll taxes refers to the taxes deducted to fund Medicare and Social Security programs in the United States. These are labeled as MedFICA and FICA on pay stubs. Federal income tax, which is also withheld from employee paychecks, goes into the general fund of the U.S. Treasury.2

Most states and some cities and counties impose income taxes as well, and these amounts are paid directly to their coffers. In addition, employers, but not employees, also pay federal unemployment taxes for each of their employees.3

Unlike the U.S. income tax, which is a progressive tax, some elements of payroll taxes are levied only up to a certain yearly limit. For example, any income that exceeds the Social Security wage base, set at $142,800 in 2021, is not subject to Social Security tax, making the U.S. payroll tax a regressive tax. This limit will increase to $147,000 in the 2022 tax year.4

In addition to income taxes, payroll taxes are collected by federal authorities and some state governments in many countries, including the U.S. These payroll tax deductions are itemized on an employee’s pay stub. The itemized list notes how much is withheld for federal, state, and municipal income taxes, as well as the amounts collected for Medicare and Social Security payments.

Governments use revenues from payroll taxes to fund specific programs, including Social Security, healthcare, and workers’ compensation. Local governments may collect a small payroll tax to maintain and improve local infrastructure and services, including first responders, road maintenance, and parks.

Unemployment Taxes

Employers bear the primary responsibility for funding unemployment insurance. If they lay off employees, those employees are entitled to unemployment benefits. The rate of unemployment insurance the employer will pay varies by industry, state, and federal fees. Some states require employees to contribute to unemployment and disability insurance.

Federal payroll taxes cover Social Security and Medicare contributions, which constitute the Federal Insurance Contributions Act (FICA) tax. An employee pays 7.65%. The premise of Social Security and Medicare is that you pay into them during your working years in order to qualify to withdraw these funds after retiring or under certain medical circumstances. As of 2021, the rate is divided between a 6.2% deduction for Social Security on a maximum salary of $142,800 ($147,000 for the 2022 tax year) and a 1.45% share for Medicare.5

There is no salary limit on Medicare, but anyone who earns more than $200,000—or $250,000 for married couples filing jointly—pays another 0.9% for Medicare as of 2021.6

As of 2021, employees pay 6.2% into Social Security for the first $142,800 and another 1.45% into Medicare on all wages.5 This figure will increase to $147,000 in 2022.7

Special Considerations

Self-employed individuals, including contractors, freelance writers, musicians, and small business owners, must remit payroll taxes, sometimes referred to as self-employment taxes.

Unlike most salaried workers, self-employed people don’t have employers to remit payroll taxes on their behalf. As a result, they must cover both the employer and employee portions of the tax on their own.8

The self-employment tax rate is 15.3%, including a 12.4% contribution to Social Security—old-age, survivors, and disability insurance. The other portion of the tax, as of 2021, is a 2.9% payment to Medicare, with another 0.9% surtax for Medicare applies to self-employment earnings that exceed $200,000.9

Social Security Payroll Tax

Funds paid to Social Security taxes go into two trust funds: the Old-Age and Survivors Insurance (OASI) Trust Fund, which pays retirement and survivor benefits, and the Disability Insurance Trust Fund, for disability benefits.10 The Secretary of the Treasury, the Secretary of Labor, the Secretary of Health and Human Services, the Commissioner of Social Security, and two public trustees manage these trust funds.11

President Franklin D. Roosevelt signed the Social Security Act into law on Aug. 14, 1935, to provide a safety net for the disabled and retirees. When the program was conceived, high-wage earners were exempt from paying into the fund and receiving Social Security benefits.12 However, the U.S. Congress replaced the exemption with a cap that usually increases at the same rate as wages.13

Medicare Payroll Tax

As noted above, payroll taxes also go toward Medicare. These payroll deductions go into two separate trust funds: the Hospital Insurance Trust Fund and the Supplementary Medical Insurance Trust Fund.14

Medicare Part A

The Hospital Insurance Trust Fund pays for Medicare Part A and the associated administration fees. Part A assists in covering hospital care, skilled nursing inpatient care, and, in some cases, home care.14

Most people don’t pay a premium for Part A (hospital insurance) since they likely paid into the program during their working years through the payroll tax. However, the Medicare Part A deductible is $1,484 for 2021 and $1,556 for 2022.15

Medicare Parts B and D

The Supplementary Medical Insurance Trust Fund assists in paying for Medicare Parts B and D and other Medicare program administration costs. Part B covers laboratory tests and screenings, outpatient care, x-rays, ambulance service, and many additional costs. Part D helps with prescription drugs.14

The standard premium for Medicare Part B is $148.50 per month for 2021 and $170.10 for 2022, except for those with higher incomes who may be charged a higher monthly premium. The Part B deductible is $203 for 2021 and $233 for 2022.1516

Medicare Part D coverage (prescription drugs) will cost an average of $33 per month in 2022 versus $31.47 per month in 2021.17 For those who enrolled in a Medicare Advantage plan, the average premium in 2022 will be $19 per month, compared to $21.22 in 2021.18

Payroll Taxes vs. Income Taxes

There is a distinction between a payroll tax and an income tax, although both are deducted from paychecks. Payroll taxes are used to fund specific programs. Income taxes go into the general funds at the U.S. Treasury.2

Everyone pays a flat payroll tax rate up to a yearly cap. Income taxes, however, are progressive. Rates vary based on an individual’s earnings.

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