FICA is a payroll tax that funds Social Security and Medicare

FICA stands for the Federal Insurance Contributions Act. It is a payroll tax taken from your wages to fund two federal programs: Social Security and Medicare. Your employer withholds FICA from your paycheck, and if you are self-employed, you pay it directly to the IRS.

FICA has two parts. The Social Security portion is 6.2% of your wages (up to a yearly cap set by the IRS, which changes annually). The Medicare portion is 1.45% of all your wages with no cap. If you are an employee, your employer matches these amounts — meaning your employer also pays 6.2% for Social Security and 1.45% for Medicare on your behalf. If you are self-employed, you pay both the employee and employer share, which is called self-employment tax.

FICA withholding appears on your pay stub as separate line items. The money goes directly to the U.S. Treasury, not into a personal account in your name. When you reach retirement age or become disabled, or if you die, Social Security and Medicare use your FICA payment history to determine your benefits.

Key Takeaways

  • FICA funds Social Security retirement, disability, and survivor benefits, plus Medicare health insurance for people 65 and older.
  • Employees pay 6.2% for Social Security (capped annually) and 1.45% for Medicare, with employers matching both amounts.
  • Self-employed people pay both the employee and employer share, totaling 15.3% for Social Security (capped) and 2.9% for Medicare.
  • Your FICA payment history determines how much Social Security and Medicare you receive later, so the IRS tracks your earnings record.

How FICA is split between Social Security and Medicare

The Social Security portion of FICA (6.2%) funds retirement benefits, disability benefits for workers under 65, and survivor benefits for families of deceased workers. This is the part that has a yearly wage cap — in 2024, you only pay Social Security tax on the first $168,600 of income, though this threshold changes each year. Once you earn above that cap in a given year, no more Social Security tax is withheld from your remaining paychecks that year.

The Medicare portion (1.45%) funds hospital insurance (Part A) and is withheld on all your wages with no cap. There is also an additional Medicare tax of 0.9% that applies to wages above $200,000 per year for single filers, $250,000 for married filing jointly, and $125,000 for married filing separately. This additional tax has no employer match — only the employee pays it.

Together, these two taxes make up your total FICA obligation. On a typical pay stub, you will see them listed separately so you can see exactly how much goes to each program.

Why FICA matters for your future benefits

FICA is not a savings account. The taxes you pay today go to current retirees and Medicare beneficiaries. In return, the Social Security Administration (SSA) keeps a record of your earnings history. This record determines how much you will receive in Social Security benefits when you retire, become disabled, or (if you die) what your family receives.

The SSA calculates your benefit amount based on your 35 highest-earning years of work. If you have fewer than 35 years of earnings, zeros are counted for the missing years, which lowers your benefit. You need at least 40 work credits (roughly 10 years of work) to be covered by Social Security retirement benefits. Credits are earned by paying FICA taxes, and the amount of income needed per credit changes yearly.

You can check your earnings record and benefit estimate by creating an account on ssa.gov. The SSA recommends reviewing your record every few years to catch errors, because mistakes in your earnings history can reduce your benefits.

FICA for self-employed people

If you are self-employed, you pay FICA as self-employment tax on your net business income. The rate is 15.3% total: 12.4% for Social Security (on income up to the yearly cap) and 2.9% for Medicare (on all income). This is higher than the employee rate because you are paying both the employee and employer share.

You report self-employment tax on Schedule SE (Form 1040) when you file your income tax return. You can deduct half of your self-employment tax as a business expense on your tax return, which reduces your taxable income. Self-employed people also file quarterly estimated tax payments to the IRS if they expect to owe more than a certain amount.

Self-employment income counts toward Social Security the same way W-2 wages do. Your earnings record builds the same way, and you need the same 40 credits to be covered by Social Security benefits.

What happens if you do not pay FICA

If you work as an employee and your employer does not withhold FICA, that is illegal. Employers are required by law to withhold FICA and remit it to the IRS. If your employer fails to do this, you can report it to the IRS or the Department of Labor. However, you are still responsible for paying your share of FICA — your employer's failure to withhold does not erase your tax obligation.

If you are self-employed and do not pay self-employment tax, the IRS can assess penalties and interest. More importantly, years without FICA payments do not count toward your Social Security work credits, which means you may not have enough credits to receive benefits later. Even one year of self-employment income that goes unreported can affect your long-term benefit amount.

If you believe your employer has not paid FICA on your behalf, you can contact the IRS at 1-800-829-1040 or file Form 13909 (Whistleblower Submission) online.

FICA withholding and your tax return

FICA withholding is separate from income tax withholding, though both appear on your pay stub. Your employer withholds federal income tax based on the W-4 form you complete, and withholds FICA automatically. These are two different taxes going to two different places.

When you file your income tax return, FICA withholding does not change. The amount you paid in FICA is shown on your W-2 form (boxes 4 and 6 for Social Security and Medicare withholding). You cannot claim FICA as a credit or deduction on your 1040 — it is a separate payroll tax, not part of your income tax calculation.

If you overpaid FICA in a year — for example, because you worked for two employers and both withheld Social Security tax on income above the yearly cap — you can claim a credit on your tax return. This is one of the few situations where FICA appears on your 1040.

Frequently Asked Questions

Can I opt out of paying FICA?

No. FICA is mandatory for all employees and self-employed people. The only exceptions are certain religious groups (like some Amish and Mennonite communities) who have received an IRS exemption, and some nonresident aliens on specific visa types. For everyone else, FICA withholding is required by law.

What if I worked under a fake Social Security number or no number at all?

If FICA taxes were withheld but not matched to a valid Social Security number, the money goes into a suspense file at the SSA. You can contact the SSA to claim those earnings and add them to your record, but you will need proof of employment and income. If no number was used, those earnings typically do not count toward your work credits.

Do I get my FICA money back when I retire?

No. FICA is not a personal savings account. You receive Social Security benefits based on your earnings record and age, not based on the exact amount you paid in. Some people receive more than they paid in; others receive less. The benefit amount depends on when you claim, your age, and your earnings history.

How do I know how much FICA I have paid?

You can view your FICA payment history on your Social Security Statement, which you can access by creating a my Social Security account at ssa.gov. Your W-2 form also shows FICA withholding for each year. The SSA keeps a complete record of all your earnings and FICA contributions.

What if my employer withheld the wrong amount of FICA?

Contact your employer's payroll department first — errors happen and can usually be corrected. If your employer will not fix it, you can file Form 941-X (Amended Payroll Tax Return) if you are the employer, or contact the IRS at 1-800-829-1040 to report the error. Keep copies of your pay stubs as proof.