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 directly from your paycheck. The money 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).

FICA has two parts. The Social Security portion is 6.2% of your wages. The Medicare portion is 1.45% of your wages. If you are self-employed, you pay both the employee and employer share — 12.4% for Social Security and 2.9% for Medicare — though you can deduct half of it on your tax return.

Your employer withholds FICA from your paycheck and sends it to the U.S. Treasury. You see the deduction listed as "Social Security" and "Medicare" on your pay stub. The money does not sit in an account with your name on it. It goes into a general fund that pays current beneficiaries and covers program costs.

Key Takeaways

  • FICA is split between Social Security (6.2%) and Medicare (1.45%), taken from every paycheck for most workers.
  • Your employer withholds FICA and sends it to the federal government; the money funds current retirees and Medicare beneficiaries, not a personal account.
  • Self-employed people pay the full FICA rate (both employee and employer portions) but can deduct half on their taxes.
  • FICA applies to wages up to a cap for Social Security ($168,600 in 2024, adjusted yearly), but Medicare has no wage cap.

How much FICA you pay depends on your income and employment status

If you work for an employer, FICA is automatic. Your employer calculates it based on your gross pay and withholds it before you receive your paycheck. The rate is fixed: 6.2% for Social Security and 1.45% for Medicare.

The Social Security portion only applies to income up to a certain limit, called the wage base. This limit changes each year. In 2024, you pay Social Security tax on the first $168,600 of income. Income above that amount is not subject to Social Security tax, though it is still subject to Medicare tax. Medicare tax has no income cap — you pay 1.45% on all wages, no matter how much you earn.

If you are self-employed, you report your net business income on Schedule C of your tax return. You then calculate FICA (called self-employment tax) on that income using Schedule SE. The rate is double what employees pay because you cover both the employee and employer portions. You can deduct half of your self-employment tax when you file your return.

FICA contributions build your Social Security record

Each year you pay FICA, the Social Security Administration records your earnings. These records determine how much you can receive from Social Security later. You need 40 credits to be covered by Social Security — roughly 10 years of work at any income level. After you have 40 credits, you remain covered for life, even if you stop working.

Your Social Security benefit amount is based on your highest 35 years of earnings. The more you earn over your working life, the higher your benefit will be when you retire or become disabled. If you have fewer than 35 years of earnings, zeros are counted for the missing years, which lowers your average.

You can view your Social Security earnings record online at ssa.gov using your personal my Social Security account. The record shows what the Social Security Administration has on file for each year you worked. If you spot an error — a missing year, an employer name wrong, or earnings recorded under the wrong name — you can request a correction.

Medicare coverage also depends on FICA contributions

Your Medicare tax payments do not directly fund your own future coverage the way Social Security does. Instead, Medicare tax pays for current beneficiaries' hospital insurance (Part A). When you turn 65, you become covered by Medicare Part A automatically if you have paid Medicare tax for at least 10 years (or if your spouse has).

If you have not paid enough Medicare tax to may have access to for free Part A coverage, you can still buy it when you turn 65, though the premium will be higher. Most people do not have to pay a premium for Part A because they have worked long enough and paid enough Medicare tax.

Medicare Part B (doctor visits and outpatient care) and Part D (prescription drugs) are optional and have separate premiums. Part B premiums are based on your income from two years prior, so higher earners pay more. FICA tax does not directly determine these premiums.

What happens if you work for multiple employers or change jobs

If you work for more than one employer in the same year, each employer withholds FICA based on your pay from that job alone. This can result in overpaying Social Security tax if your combined income exceeds the wage base. For example, if you earn $100,000 from one job and $80,000 from another, you will pay Social Security tax on both amounts, even though your total is $180,000 — above the $168,600 cap.

When you file your tax return, you can claim a credit for the overpaid Social Security tax. The IRS will refund the excess. You do not get a refund for overpaid Medicare tax — there is no cap, so no overpayment occurs.

If you change jobs, your new employer will not know how much you have already paid in FICA that year. Make sure to report your prior earnings accurately on your W-4 form so your new employer can withhold the correct amount. If you do not, you may owe taxes when you file your return.

FICA is different from federal income tax

FICA and federal income tax are separate deductions on your paycheck. FICA funds Social Security and Medicare. Federal income tax funds general government operations. They are calculated differently and withheld separately.

Federal income tax withholding depends on the W-4 form you fill out with your employer. You choose how much to withhold based on your personal situation. FICA withholding is automatic and the same for everyone at the same income level — there is no choice involved.

You also pay state income tax in most states, and some cities charge local income tax. These are separate from both FICA and federal income tax. Your pay stub will show all of these deductions listed separately.

Frequently Asked Questions

Can I opt out of paying FICA?

No. FICA is mandatory for all employees and self-employed people. The only exception is certain religious groups that have been granted exemption by the IRS, and some government employees hired before specific dates who are covered by alternative retirement systems. Most workers have no option to stop paying FICA.

What if I did not pay FICA for some years?

Years with no earnings or no FICA contributions count as zeros in your Social Security calculation. You need 40 credits to be covered, but the benefit amount is based on your highest 35 years of earnings. Missing years lower your average benefit. You can still receive Social Security if you have 40 credits, even if some years are zeros.

Do I get my FICA money back?

Not directly. FICA is a tax, not a savings account. The money you pay goes to current beneficiaries. When you retire or become disabled, future workers' FICA payments fund your benefits. If you die before claiming Social Security, your family may receive survivor benefits, but you do not get a refund of your contributions.

Why is self-employment tax higher than employee FICA?

Self-employed people pay both the employee and employer portions of FICA because they are both. An employee's employer pays half the FICA cost, but a self-employed person has no employer, so they pay the full amount. You can deduct half of self-employment tax on your return to offset this.

Does FICA apply to all income?

FICA applies to wages, salaries, and net self-employment income. It does not apply to investment income, rental income, or other passive income unless you are self-employed and that income is part of your business. Certain types of compensation, like some fringe benefits, are also excluded from FICA.