FICA tax is the money taken from your paycheck to fund Social Security and Medicare

FICA stands for Federal Insurance Contributions Act. It is a payroll tax — money your employer withholds from your paycheck every pay period. The money goes into two separate federal programs: Social Security and Medicare. You will see FICA listed on your pay stub as two line items: Social Security tax and Medicare tax.

FICA is mandatory. If you work as an employee, your employer must take it out. If you are self-employed, you pay both the employee and employer portions yourself, called self-employment tax. The amount withheld depends on your gross income — how much you earn before any deductions — not on how many dependents you have or your filing status.

The money does not go into a personal account with your name on it. It goes into a federal trust fund that pays current beneficiaries. When you retire, become disabled, or die, your family may receive benefits from these same programs, but the amount is based on your earnings record and age, not on how much FICA tax you paid in.

Key Takeaways

  • FICA tax funds Social Security and Medicare; your employer withholds it automatically from each paycheck.
  • Social Security tax is 6.2% of your wages up to an annual cap (the cap changes yearly), and Medicare tax is 1.45% with no cap.
  • If you earn over a certain threshold, you pay an additional 0.9% Medicare tax on the excess income.
  • FICA tax is separate from federal income tax; both appear on your pay stub but fund different programs.
  • Self-employed workers pay both the employee and employer share of FICA, totaling 15.3% for Social Security and Medicare combined.

How much FICA tax comes out of your paycheck

The Social Security portion is 6.2% of your wages, but only up to a maximum annual income. That maximum changes each year. For 2024, you pay Social Security tax on income up to $168,600. Once you reach that cap in a calendar year, no more Social Security tax is withheld for the rest of that year, even if you earn more.

The Medicare portion is 1.45% of all your wages with no income cap. This means you pay Medicare tax on every dollar you earn, no matter how much that is. If your income exceeds $200,000 (or $250,000 if married filing jointly), you pay an additional 0.9% Medicare tax on the amount over the threshold.

Your employer withholds these amounts and sends them to the IRS. You can see the exact dollar amounts on your pay stub under "FICA" or broken down as "Social Security" and "Medicare" or "OASDI" (Old Age, Survivors, and Disability Insurance).

FICA tax versus federal income tax

FICA and federal income tax are two separate withholdings. Both come out of your paycheck, but they fund different programs and are calculated differently. Federal income tax goes to the general Treasury and funds government operations. FICA tax goes specifically to Social Security and Medicare.

Federal income tax is based on your tax bracket, filing status, and the number of dependents you claim on your W-4 form. FICA tax is a flat percentage with no adjustments for personal circumstances. You cannot reduce FICA withholding by claiming more dependents or changing your W-4, the way you can with federal income tax.

When you file your tax return, you report both. The IRS uses your federal income tax withholding to calculate whether you owe more tax or get a refund. FICA tax is separate; it goes directly to Social Security and Medicare and does not factor into your tax refund.

Who pays FICA tax and who does not

Most workers pay FICA tax. If you are an employee, your employer withholds it. If you are self-employed, you calculate and pay it yourself when you file your tax return. Railroad workers pay into a similar but separate system called the Railroad Retirement Tax Act (RRTA) instead of FICA.

Some workers are exempt. Federal employees hired before 1984 do not pay Social Security tax (though they pay Medicare tax). Some state and local government employees do not pay FICA if they are covered by a pension plan instead. Certain religious groups that have filed for exemption do not pay FICA.

Nonresident aliens, students on certain visas, and workers for foreign governments may be exempt in specific situations. If you think you might be exempt, check with your employer's payroll department or a tax professional, because the rules are narrow and the consequences of paying incorrectly can affect your Social Security record.

What happens to the FICA tax you pay

Social Security tax goes into the Social Security Trust Fund. The money pays benefits to people who are retired, disabled, or the surviving family members of workers who have died. Medicare tax goes into two trust funds: one for hospital insurance (Part A) and one for supplementary medical insurance (Part B).

The system is pay-as-you-go. Current workers' FICA taxes pay current beneficiaries' benefits. You are not building up a personal account. Instead, you are earning a record of earnings that determines your benefit amount when you become may be able to access. The more you earn over your working years, the higher your eventual benefit.

Your earnings record is tracked by Social Security using your Social Security number. You can view your record online at ssa.gov by creating a my Social Security account. The record shows your reported earnings for each year and an estimate of your future benefits.

FICA tax for self-employed workers

If you are self-employed, you pay self-employment tax, which is FICA tax for people who do not have an employer. You pay both the employee share (6.2% for Social Security, 1.45% for Medicare) and the employer share (another 6.2% for Social Security, another 1.45% for Medicare). The total is 15.3% for Social Security and Medicare combined.

You calculate self-employment tax on your net profit — your business income minus business expenses — using Schedule SE when you file your tax return. You pay it along with your federal income tax, usually in quarterly estimated tax payments. The Social Security portion is still capped at the annual maximum income; the Medicare portion has no cap.

You can deduct half of your self-employment tax as a business expense on your tax return, which reduces your taxable income. This deduction does not reduce the amount of FICA tax you owe, only your federal income tax.

How FICA tax affects your Social Security and Medicare benefits

Your FICA tax record determines your Social Security benefit amount. Social Security calculates your benefit based on your 35 highest-earning years. If you have fewer than 35 years of earnings, zeros are counted for the missing years, which lowers your average. You need at least 40 credits of earnings to be may be able to access for retirement benefits; in 2024, you earn one credit for each $1,730 of wages, up to four credits per year.

For Medicare, you become may be able to access at age 65 if you have at least 40 credits of earnings (the same requirement as Social Security retirement). If you do not have 40 credits, you can still buy Medicare coverage at age 65, but you will pay higher premiums. Your FICA tax history does not affect your Medicare premium amount once you are enrolled; premiums are based on your current income.

If you stop working before reaching full retirement age, your FICA tax record stops growing, but your existing record remains. You can still claim Social Security at a reduced rate as early as age 62, or wait until full retirement age or later for a higher benefit.

Frequently Asked Questions

Why do I have to pay FICA tax if I might not get the money back?

FICA tax funds current benefits for retirees, disabled workers, and survivors — not a personal savings account. You are required to contribute because these are federal insurance programs. If you become disabled or die, your family may receive benefits even if you have not reached retirement age. Most people who reach retirement age do receive benefits, though the amount depends on your earnings record and when you claim.

Can I opt out of paying FICA tax?

No. FICA tax is mandatory for employees and self-employed workers. Your employer must withhold it, and you cannot reduce it by changing your W-4 or claiming exemptions. The only way to avoid FICA tax is to fall into a specific exempt category, such as certain government employees or religious groups with approved exemptions.

What if I worked under different Social Security numbers?

Contact Social Security directly. If you have earnings under multiple numbers, they may not all be credited to your record. Social Security can help consolidate your earnings history if you provide proof of your identity and work history. The sooner you report this, the better, because it affects your benefit calculation.

Does FICA tax apply to tips, bonuses, and overtime?

Yes. FICA tax applies to all wages, including tips, bonuses, overtime, and commissions. Your employer withholds FICA on your gross pay before any deductions. The only income that is typically exempt is certain employer-provided benefits like health insurance premiums.

Why is my FICA tax the same percentage every year if the cap changes?

The percentage rates (6.2% for Social Security, 1.45% for Medicare) stay the same, but the income cap for Social Security changes yearly based on wage growth. This means if you earn more than the previous year's cap, you may pay more Social Security tax in the new year. Once you hit the new cap, withholding stops for that year.