Payroll taxes are money your employer withholds from your paycheck and sends to federal and state governments

When you see your paycheck, the amount you take home is less than what you earned. That difference includes payroll taxes — amounts your employer is required by law to deduct and send directly to the IRS and your state tax authority. You do not write a check yourself; the money never reaches your bank account.

Payroll taxes fund three specific programs: Social Security, Medicare, and federal income tax withholding. Your employer also pays a matching amount on your behalf, though you do not see that deduction on your stub. The total system is called FICA, which stands for Federal Insurance Contributions Act.

The amount withheld depends on how much you earn, how often you are paid, and the information you provided on your W-4 form when you started the job. If you change jobs, get married, have children, or experience a major life change, your withholding can change too.

Key Takeaways

  • Social Security tax is 6.2 percent of your gross pay, and Medicare tax is 1.45 percent; together they total 7.65 percent in FICA withholding.
  • Federal income tax withholding is separate from FICA and varies based on your W-4 form, your income level, and your filing status.
  • Your employer matches the Social Security and Medicare amounts you pay, but that money does not appear on your paycheck.
  • State and local income taxes are withheld in addition to federal taxes in most states, and the rates vary by location.
  • The W-4 form controls how much federal income tax is withheld; changing it mid-year affects your next paycheck.

Social Security and Medicare taxes (FICA)

Social Security and Medicare are payroll taxes that fund two separate government programs. Social Security provides retirement, disability, and survivor benefits. Medicare provides health insurance for people 65 and older and some younger people with disabilities.

The Social Security portion is 6.2 percent of your gross pay (the amount before any deductions). The Medicare portion is 1.45 percent. Together, FICA withholding is 7.65 percent of what you earn. If you earn $1,000 in a paycheck, $76.50 goes to FICA taxes.

There is a cap on Social Security withholding: once you earn a certain amount in a calendar year, you stop paying the 6.2 percent Social Security tax on additional income. That cap changes each year. Medicare tax has no cap — you pay 1.45 percent on all wages, no matter how much you earn.

If you are self-employed, you pay both the employee and employer portions of FICA, which totals 15.3 percent. W-2 employees pay only the employee portion because the employer covers the other half.

Federal income tax withholding

Federal income tax withholding is separate from FICA and is based on your W-4 form. When you start a job, you fill out a W-4 to tell your employer how much federal income tax to deduct from each paycheck. The form asks about your filing status (single, married, head of household), the number of dependents you claim, and whether you have other income or jobs.

The IRS uses this information to calculate a withholding amount. The goal is to withhold enough so that when you file your tax return in April, you do not owe a large amount or get a large refund. In reality, most people either overpay (and get a refund) or underpay (and owe money).

You can change your W-4 at any time during the year. If you get a second job, get married, or have a major change in income, you can submit a new W-4 to your employer and your withholding will adjust on the next paycheck. The IRS provides a withholding calculator on its website to help you figure out the right amount.

State and local income taxes

In addition to federal taxes, most states withhold state income tax from your paycheck. The rate varies by state — some states have no income tax at all, while others withhold up to 13 percent or more. A few cities and counties also withhold local income tax.

You typically fill out a state W-4 form (or equivalent) when you start a job, similar to the federal W-4. Some states use the same form; others have their own. The state tax is withheld separately from federal tax and sent to your state revenue department, not the IRS.

If you work in one state but live in another, you may owe tax to both states, or one state may give you a credit for taxes paid to the other. This situation is common for people who live near state borders or work remotely. Your employer withholds based on where you work, so you may need to file additional returns or claim credits when you file your tax return.

How withholding amounts are calculated

Your employer uses the information on your W-4 and your gross pay to calculate withholding using IRS tax tables or software. The calculation accounts for your filing status, the number of dependents you claim, and any additional income or adjustments you listed.

The more dependents you claim on your W-4, the less federal income tax is withheld. If you claim zero dependents, more tax is withheld. This is why people sometimes adjust their W-4 if they expect a large refund (meaning too much was withheld) or if they owe money at tax time (meaning too little was withheld).

Bonus pay, overtime, and irregular income are sometimes withheld at a flat rate (often 22 percent for federal income tax) rather than using the standard calculation. This is a simplified method and may not be accurate for your situation, which is why your final tax return reconciles everything.

What happens to payroll taxes after they are withheld

Your employer sends the withheld taxes to the government on a schedule set by the IRS. For most employers, this happens every two weeks or monthly. The employer also sends their matching portion of Social Security and Medicare taxes at the same time.

The federal income tax and FICA taxes go to the U.S. Treasury. Social Security and Medicare taxes are credited to your individual account and tracked by your Social Security number. When you retire, become disabled, or pass away, your benefits are calculated based on how much you paid into the system over your working years.

State income taxes go to your state revenue department and are used to fund state programs and services. Local taxes go to your city or county.

Why your paycheck stub shows both employee and employer taxes

Your paycheck stub lists the taxes withheld from your pay — the employee portion. It often also shows the employer portion as an informational line, even though that money does not come out of your paycheck. This shows you the full cost of your employment to your employer.

For example, if you earn $1,000, your stub might show $76.50 in FICA withholding (your portion) and another $76.50 listed as the employer match. You only see the first amount deducted; the second is paid by your employer separately to the government.

Understanding this distinction matters if you are self-employed or considering self-employment. Self-employed people must pay both portions, which is why self-employment tax is higher than what W-2 employees pay.

Frequently Asked Questions

Can I avoid payroll taxes by claiming exempt on my W-4?

You cannot avoid FICA taxes (Social Security and Medicare) — those are mandatory for all W-2 employees. You can reduce federal income tax withholding by adjusting your W-4, but the IRS has strict rules about who can claim exempt status. If you claim exempt and do not meet the IRS criteria, you may owe taxes and penalties when you file your return.

What if too much or too little tax is being withheld?

If you are getting a large refund every year, too much is being withheld. If you owe money at tax time, too little is being withheld. You can adjust your W-4 at any time to change the amount. Use the IRS withholding calculator to estimate the right amount for your situation.

Do I get credit for payroll taxes I paid?

Yes. The Social Security and Medicare taxes you pay are credited to your account and determine your future benefits. Federal income tax withheld is credited against your total tax liability when you file your return in April. If you overpaid, you get a refund; if you underpaid, you owe the difference.

What if I have two jobs — do I pay payroll taxes on both?

Yes. You pay FICA taxes on all wages from all jobs. However, you may overpay Social Security tax if your combined earnings exceed the annual cap. When you file your tax return, you can claim a credit for the overpayment. Federal income tax withholding is calculated separately for each job based on the W-4 you submit to each employer.

Are payroll taxes the same as income tax?

No. Payroll taxes include both FICA taxes (Social Security and Medicare) and federal income tax withholding. FICA taxes are fixed percentages and fund specific programs. Federal income tax withholding is based on your W-4 and is separate. Together, they make up most of the deductions on your paycheck.