FICA is the money taken from your paycheck for Social Security and Medicare

FICA stands for the Federal Insurance Contributions Act. It is a payroll tax that funds two programs: Social Security (retirement, disability, and survivor benefits) and Medicare (health insurance for people 65 and older, and some younger people with disabilities). When you see FICA deductions on your pay stub, you are looking at money withheld to pay into these two programs.

FICA is split into two parts. The Social Security portion is 6.2% of your wages, and the Medicare portion is 1.45% of your wages. If you are self-employed, you pay both the employee and employer share, which doubles the rate. Your employer also pays a matching amount for each of these taxes on your behalf — that money does not come from your paycheck, but it is part of your total compensation cost to them.

Unlike income tax, which varies based on your filing status and deductions, FICA is a flat percentage applied to almost all wages you earn. There is a wage cap for Social Security (the amount changes each year), but Medicare has no cap — you pay 1.45% on all earnings, no matter how much you make.

Key Takeaways

  • FICA has two parts: 6.2% for Social Security and 1.45% for Medicare, both taken directly from your paycheck.
  • Your employer also pays a matching amount that does not show on your pay stub but counts toward your Social Security and Medicare credits.
  • Social Security tax stops once you reach the annual wage cap (which changes yearly), but Medicare tax continues on all income.
  • Self-employed people pay both the employee and employer portions of FICA, totaling 15.3% for Social Security and Medicare combined.
  • FICA withholding is separate from federal income tax and is not affected by your W-4 form or tax deductions.

How FICA appears on your pay stub

Your pay stub shows FICA deductions as two separate line items: one labeled "Social Security" or "OASDI" (Old Age, Survivors, and Disability Insurance) and one labeled "Medicare." Each shows the amount withheld from that paycheck. If you look at your year-to-date totals on your final pay stub of the year, you can see how much you have paid into each program over the entire year.

The amount withheld is automatic — your employer calculates it based on your gross wages and sends it to the IRS along with their matching contribution. You do not fill out a form to authorize FICA withholding the way you do for federal income tax. FICA is mandatory for nearly all workers, with very few exceptions (some religious groups and certain government employees have exemptions, but these are rare).

The Social Security wage cap and why it matters

Social Security tax only applies to wages up to a certain amount each year. In 2024, that cap was $168,600. Once you earn that much in a calendar year, your employer stops taking Social Security tax from your remaining paychecks for that year. Medicare tax, however, has no cap — you pay 1.45% on every dollar you earn, regardless of how much that is.

This means high earners pay a smaller percentage of their total income into Social Security than lower-wage workers do. A person earning $50,000 pays Social Security tax on 100% of their wages. A person earning $500,000 pays Social Security tax on only about 34% of their wages (the $168,600 cap divided by $500,000). This is by design — Social Security benefits are also capped, so the program does not collect tax on income above the cap.

Self-employed workers and FICA

If you are self-employed, you pay FICA through the self-employment tax, which you calculate on Schedule SE and report on your tax return. Self-employed people pay both the employee and employer portions of Social Security and Medicare tax, totaling 15.3% (12.4% for Social Security and 2.9% for Medicare). This is roughly double what an employee pays, because there is no employer to contribute the matching share.

However, self-employed people get a partial offset: you can deduct half of your self-employment tax when calculating your adjusted gross income on your tax return. This reduces the tax burden slightly, but self-employed FICA is still significantly higher than what a W-2 employee pays. You pay self-employment tax on your net profit from self-employment, not on your gross revenue.

FICA versus federal income tax withholding

FICA and federal income tax are two separate withholdings on your paycheck, and they work differently. Federal income tax withholding is based on the W-4 form you fill out with your employer — it depends on your filing status, number of dependents, and other factors. FICA withholding is automatic and the same for everyone: 6.2% for Social Security and 1.45% for Medicare, with no adjustments.

You cannot reduce or eliminate FICA withholding by changing your W-4. The only way to lower FICA taxes is to earn less money or to use pre-tax deductions like a 401(k) or health savings account, which reduce your taxable wages. Federal income tax withholding, by contrast, changes based on your W-4 choices — you can have more or less withheld depending on your situation.

What happens to the FICA money you pay

The FICA taxes you pay go into two separate trust funds managed by the Social Security Administration. The Social Security tax funds the Old Age, Survivors, and Disability Insurance program, which pays monthly benefits to retirees, disabled workers, and survivors of deceased workers. The Medicare tax funds the Hospital Insurance Trust Fund, which covers hospital stays, skilled nursing, hospice, and home health care for Medicare beneficiaries.

These are not savings accounts — the money you pay in today goes out to current beneficiaries. When you retire, your benefits come from FICA taxes paid by workers at that time. This is why FICA is sometimes called a "pay-as-you-go" system. Your FICA record is tracked by your Social Security number, and you can view your estimated benefits and contribution history on your Social Security account at ssa.gov.

Frequently Asked Questions

Why do I pay FICA if I am not retired yet?

FICA is mandatory for all workers because it funds current beneficiaries and builds your own benefit record. You earn credits toward Social Security and Medicare based on your FICA contributions. When you retire, become disabled, or if your family needs survivor benefits, you draw from the program you have been funding.

Can I opt out of FICA taxes?

No, FICA is mandatory for nearly all workers. A very small number of religious groups and certain government employees have exemptions, but these require specific conditions and prior approval. Most workers have no option to opt out.

What if I work multiple jobs — do I pay FICA on all of them?

Yes, you pay FICA on wages from every job. However, if your combined wages exceed the Social Security wage cap, you may have overpaid Social Security tax. You can claim a credit for the overpayment on your tax return when you file.

Does FICA withholding count toward my federal income tax?

No. FICA and federal income tax are separate. FICA funds Social Security and Medicare. Federal income tax funds general government operations. Both are withheld from your paycheck, but they go to different places and serve different purposes.

How do I know if my FICA contributions are being recorded correctly?

You can create a free account at ssa.gov and view your Social Security Statement, which shows your earnings history and estimated benefits. Check it every few years to make sure your employer reported your wages correctly. If you spot an error, contact Social Security directly.