Payroll tax is money taken from your paycheck to fund Social Security, Medicare, and unemployment insurance

Payroll tax is not income tax. It is a separate tax withheld from your wages specifically to fund three federal programs: Social Security retirement and disability benefits, Medicare health insurance for people 65 and older, and unemployment insurance for workers who lose their jobs. Your employer withholds these amounts before you receive your paycheck, and your employer also contributes a matching amount on your behalf.

The money does not sit in an account with your name on it. Instead, it goes into a general fund that pays current beneficiaries. When you retire or become disabled, your own benefits will be paid from taxes withheld from current workers' paychecks. This is called a pay-as-you-go system.

Payroll tax is mandatory for almost all workers. Self-employed people pay both the employee and employer portions, called self-employment tax. Federal income tax, by contrast, is separate and is based on your total income and filing status.

Key Takeaways

  • Payroll tax funds Social Security, Medicare, and unemployment insurance — three distinct programs with different tax rates and wage caps.
  • Your employer withholds payroll tax from your paycheck and also pays a matching amount, so the total cost to your employer is roughly double what you see withheld.
  • Social Security and Medicare taxes apply to all wages up to a cap (the cap changes yearly), while unemployment tax varies by state and employer history.
  • You can see the exact amounts withheld on your pay stub under labels like FICA, Social Security, Medicare, or SUTA.
  • Self-employed workers pay both the employee and employer portions of Social Security and Medicare tax, totaling about 15.3 percent of net earnings.

How much payroll tax comes out of your paycheck

Social Security tax is 6.2 percent of your gross wages. Medicare tax is 1.45 percent of your gross wages. These two combined are often labeled FICA (Federal Insurance Contributions Act) on your pay stub. Your employer pays an additional 6.2 percent for Social Security and 1.45 percent for Medicare on your behalf.

Both Social Security and Medicare have a wage cap — a maximum amount of annual income subject to the tax. Social Security tax stops once you reach the cap in a given year; Medicare tax does not have a cap. The wage cap changes yearly. For 2024, the Social Security wage cap is $168,600, meaning once you earn that much in a year, no more Social Security tax is withheld from your remaining paychecks that year.

Unemployment tax is withheld differently. It is paid entirely by your employer in most states, not deducted from your paycheck. The rate and wage cap vary by state and by your employer's history of layoffs. In states that do withhold unemployment tax from employees, the rate is typically between 0.5 and 1 percent.

What your payroll tax dollars pay for

Social Security tax funds retirement benefits, survivor benefits for family members of deceased workers, and disability benefits for workers who cannot work due to injury or illness. To receive Social Security retirement benefits, you must be at least 62 years old and have worked long enough to earn credits (typically 40 credits, earned by working about 10 years). The amount you receive depends on your earnings history and the age at which you claim.

Medicare tax funds hospital insurance (Part A), which covers inpatient hospital stays, skilled nursing facility care, and hospice. It does not fund Medicare Part B (doctor visits and outpatient care) or Part D (prescription drugs), which are funded through general tax revenue and beneficiary premiums. You become may be able to access for Medicare at age 65 if you have worked long enough to earn credits, or earlier if you receive Social Security Disability Insurance.

Unemployment insurance tax funds weekly benefits paid to workers who lose their job through no fault of their own. The amount and duration of benefits vary by state. You typically must have worked a minimum period (often 12 to 18 months) and earned a minimum amount to receive benefits. Benefits are usually available for 12 to 26 weeks, depending on the state and economic conditions.

How payroll tax appears on your pay stub

Your pay stub breaks down payroll tax into separate line items. You will see "Social Security" or "FICA-SS" showing 6.2 percent of your gross pay. You will see "Medicare" or "FICA-Med" showing 1.45 percent. Some pay stubs also show an additional Medicare tax of 0.9 percent if your annual wages exceed $200,000 (single filers) or $250,000 (married filing jointly); this extra amount is withheld by your employer and funds Medicare.

If you are self-employed, you do not receive a pay stub from an employer. Instead, you calculate self-employment tax when you file your annual tax return using Schedule SE. Self-employment tax is approximately 15.3 percent of your net business income (after business expenses). You pay this in two ways: half is deducted as a business expense when you calculate your income tax, and half is paid as tax.

You can also see your cumulative payroll tax for the year on your W-2 form, which your employer sends you by January 31 each year. The W-2 shows total Social Security tax withheld in box 6 and total Medicare tax withheld in box 7.

The difference between payroll tax and income tax

Payroll tax and federal income tax are two separate withholdings. Payroll tax is a fixed percentage of your gross wages (up to the wage cap for Social Security and Medicare) and funds specific programs. Income tax is calculated based on your total income, filing status, and the number of dependents you claim on your W-4 form, and it funds general government operations.

You can adjust how much income tax is withheld by changing your W-4, but you cannot avoid payroll tax if you are employed. Self-employed people must pay both income tax and self-employment tax, and they typically make quarterly estimated tax payments rather than having tax withheld from a paycheck.

Some people owe income tax at the end of the year even though taxes were withheld, because the withholding was too low. Others receive a refund because too much was withheld. Payroll tax works differently: the amount withheld is set by law and does not result in a refund or additional bill at tax time (unless you are self-employed and underpaid your quarterly estimates).

What happens if you work multiple jobs

If you work two or more jobs, each employer withholds Social Security and Medicare tax from your wages independently. This means you could pay more Social Security tax than required if your combined wages exceed the annual wage cap. For example, if you earn $100,000 at Job A and $80,000 at Job B, you will pay Social Security tax on all $180,000 even though the 2024 cap is $168,600.

You can recover the overpayment when you file your tax return. You claim the excess Social Security tax paid as a credit on your Form 1040. Your employer does not refund it; the IRS does when you file.

Medicare tax has no wage cap, so there is no overpayment issue with multiple jobs. However, if your combined wages exceed $200,000 (single) or $250,000 (married filing jointly), the additional 0.9 percent Medicare tax applies, and each employer withholds it independently without coordinating with your other jobs. You may owe additional tax or receive a credit depending on your total wages.

Frequently Asked Questions

Can I opt out of paying payroll tax?

No. Payroll tax is mandatory for all employees. The only exception is certain religious groups that have obtained a formal exemption from the IRS, which is rare and requires specific conditions. Self-employed people must also pay self-employment tax unless they fall into a narrow exemption category.

Where does my payroll tax money actually go?

Social Security and Medicare taxes go into federal trust funds managed by the Social Security Administration and Centers for Medicare and Medicaid Services. Unemployment tax goes to your state's unemployment insurance fund. These are not personal accounts; the money is used to pay current beneficiaries and program expenses.

Will I get back what I paid in payroll tax?

You receive Social Security and Medicare benefits based on your work history and age, not based on the exact amount you paid in. Social Security benefits are calculated using a formula tied to your 35 highest-earning years. If you die before claiming benefits, your family may receive survivor benefits. If you never work long enough to earn credits, you receive nothing.

What is the additional Medicare tax?

If your wages exceed $200,000 (single filers) or $250,000 (married filing jointly), an additional 0.9 percent Medicare tax is withheld. This tax has no wage cap and funds Medicare. Your employer withholds it automatically once your wages cross the threshold in a given year.

Do independent contractors pay payroll tax?

Independent contractors do not have payroll tax withheld by a client. Instead, they pay self-employment tax, which is roughly 15.3 percent of net business income. This covers both the employee and employer portions of Social Security and Medicare. They calculate and pay this tax when they file their annual return or make quarterly estimated payments.