FICA is a federal payroll tax that funds Social Security and Medicare

FICA stands for the Federal Insurance Contributions Act. It is a federal tax taken directly from your paycheck, not a separate tax you file later. FICA has two parts: one funds Social Security, and the other funds Medicare. Your employer also pays a matching amount on your behalf, though you do not see that money.

FICA appears on your pay stub as two line items. The Social Security portion is 6.2 percent of your gross pay (the amount before deductions). The Medicare portion is 1.45 percent. Together, FICA takes 7.65 percent of your wages. If you are self-employed, you pay both the employee and employer portions yourself, which totals 15.3 percent.

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 cap on Social Security tax — in 2024, you stop paying it once you earn $168,600 — but Medicare tax has no cap and continues on all income above that threshold.

Key Takeaways

  • FICA is withheld from your paycheck at 7.65 percent (6.2 percent for Social Security and 1.45 percent for Medicare) and is a federal tax, not a state or local one.
  • Your employer pays an equal amount on your behalf, so the total FICA cost to fund these programs is 15.3 percent of your wages.
  • Social Security tax stops once you reach the annual wage cap, but Medicare tax continues on all income with no upper limit.
  • FICA funds two separate programs: Social Security retirement and disability benefits, and Medicare health insurance for people 65 and older.

How FICA differs from federal income tax

FICA and federal income tax are two separate deductions on your paycheck, and they work differently. Federal income tax is based on your tax bracket, filing status, and the number of dependents you claim on your W-4 form. FICA is a fixed percentage with no adjustments — it is the same for everyone earning wages.

Federal income tax goes to the general Treasury and funds government operations: defense, infrastructure, federal agencies, and other programs. FICA goes into two dedicated trust funds: the Social Security Trust Fund and the Medicare Trust Fund. The money you pay in FICA is earmarked for those specific programs only.

You can reduce federal income tax by claiming more dependents or adjusting your W-4, but you cannot reduce FICA. It is mandatory on nearly all wages. The only way to lower your FICA tax is to earn less income or, if you are self-employed, to reduce your net business income through legitimate business expenses.

Who pays FICA and when

If you receive a W-2 paycheck, FICA is withheld automatically. Your employer deducts it before you receive your pay and sends it to the IRS on your behalf. You will see FICA listed on your pay stub under Social Security and Medicare tax.

If you are self-employed or own a business, you pay FICA yourself when you file your tax return. Self-employed people report their income on Schedule C and calculate their FICA obligation (called self-employment tax) on Schedule SE. You pay this tax once a year with your income tax return, though you may need to make quarterly estimated tax payments if you expect to owe a large amount.

Some workers are exempt from FICA. Certain religious groups that object to insurance on principle, some government employees hired before 1984, and nonresident aliens on certain visas do not pay FICA. Students working on campus at their school and some family employees may also be exempt, depending on the situation.

What FICA funds and how the money is used

The Social Security portion of FICA (6.2 percent) funds retirement benefits, survivor benefits for families of deceased workers, and disability benefits. When you turn 62, you can begin drawing Social Security retirement benefits based on your earnings history. If you become disabled before retirement age, you may receive Social Security Disability Insurance (SSDI). If you die, your spouse and children may receive survivor benefits.

The Medicare portion of FICA (1.45 percent) funds hospital insurance (Part A) for people 65 and older and some younger people with disabilities or end-stage renal disease. Part A covers inpatient hospital stays, skilled nursing care, and hospice. It does not cover doctor visits or outpatient care, which are covered under Medicare Part B (a separate premium you pay if you enroll).

Both trust funds operate on a pay-as-you-go basis: the FICA taxes paid by current workers fund the benefits paid to current retirees and beneficiaries. The Social Security Administration and Centers for Medicare and Medicaid Services manage these programs and determine benefit amounts based on your earnings record and age.

The wage cap and how it affects higher earners

Social Security tax has an annual wage cap, which means once you earn above a certain amount in a single year, you stop paying Social Security tax on additional income. In 2024, that cap is $168,600. If you earn $200,000, you pay Social Security tax only on the first $168,600 and nothing on the remaining $31,400.

Medicare tax has no cap. You pay 1.45 percent on all wages, no matter how much you earn. Additionally, if your income exceeds certain thresholds — $200,000 for single filers, $250,000 for married filing jointly — you pay an extra 0.9 percent Medicare tax on the amount above that threshold. This additional tax was added in 2013 as part of the Affordable Care Act.

The wage cap for Social Security changes each year based on average wage growth in the economy. The IRS announces the new cap in October for the following year. If you work for multiple employers or change jobs during the year, you may overpay Social Security tax if your combined earnings exceed the cap; you can claim a credit for the overpayment when you file your tax return.

Self-employment tax and how it differs from employee FICA

If you are self-employed, you pay self-employment tax instead of having an employer withhold FICA. Self-employment tax is 15.3 percent of your net business income (the same total as employee FICA plus employer FICA combined). You calculate it on Schedule SE and report it when you file your income tax return.

Self-employed people pay both the employee and employer portions because they are both the worker and the employer. However, you can deduct half of your self-employment tax as a business expense on your tax return, which reduces your taxable income. This deduction partially offsets the higher tax burden of being self-employed.

The wage cap for self-employment tax is the same as for employees: $168,600 in 2024 for Social Security tax. Medicare self-employment tax has no cap, and the additional 0.9 percent Medicare tax applies to self-employed people above the same income thresholds as employees.

Reading your pay stub and understanding FICA deductions

On your pay stub, FICA appears as separate line items. You will see "Social Security Tax" or "OASDI" (Old Age, Survivors, and Disability Insurance) at 6.2 percent and "Medicare Tax" at 1.45 percent. Some pay stubs also show "Medicare Additional Tax" if you earn above the threshold for the extra 0.9 percent.

The amount withheld is calculated on your gross pay — the total before any deductions. If you contribute to a traditional 401(k) or health insurance premium, those amounts are deducted from your gross pay before income tax is calculated, but FICA is still withheld on the full gross amount. This is why your FICA tax may seem higher than your income tax.

Your pay stub should also show year-to-date totals for FICA taxes. At the end of the year, your employer reports your total FICA withholding on your W-2 form in boxes 4 (Social Security tax) and 6 (Medicare tax). You do not need to do anything with this information unless you overpaid Social Security tax due to multiple jobs or changing employers.

Frequently Asked Questions

Can I opt out of paying FICA?

No, FICA is mandatory for nearly all workers. Only certain religious groups with a documented objection to insurance, some government employees hired before 1984, and nonresident aliens on specific visas are exempt. If you are a U.S. citizen or permanent resident working in the private sector, you must pay FICA.

What happens if I work multiple jobs and overpay Social Security tax?

If your combined earnings from multiple jobs exceed the annual wage cap, you will overpay Social Security tax. You cannot claim a refund when you file your return, but you can claim a credit that reduces your income tax liability. Report the overpayment on Form 1040 Schedule 3.

Does FICA explore to all types of income?

FICA applies to wages and self-employment income. It does not explore to investment income, interest, dividends, capital gains, or rental income. If you have a mix of W-2 wages and self-employment income, you pay FICA on both, but the self-employment tax is calculated separately on Schedule SE.

Why do I pay FICA if I do not plan to collect Social Security?

FICA funds not only retirement benefits but also disability and survivor benefits. Even if you never collect retirement benefits, FICA protects you and your family if you become disabled or die before retirement age. Your family members may be may have access to to survivor benefits based on your earnings record.

Is FICA the same as payroll tax?

FICA is one type of payroll tax. Payroll tax is a broad term that includes FICA (Social Security and Medicare), federal income tax withholding, and state and local income taxes if applicable. FICA is federal and goes to specific trust funds, while income tax withholding goes to the general Treasury.