FICA includes two separate taxes taken from your paycheck

FICA stands for the Federal Insurance Contributions Act, and it funds two programs: Social Security and Medicare. When you see "FICA" on your pay stub, it is actually two line items working together. Your employer withholds 6.2% of your gross pay for Social Security and 1.45% for Medicare — that is 7.65% total. Your employer also pays an equal amount on your behalf, though you do not see that deduction.

These are not optional deductions and not income tax. They are dedicated payroll taxes that go into specific trust funds. Social Security money does not go into the general Treasury. Medicare money does not pay for anything except Medicare. This separation matters because it determines who receives the benefits and when.

If you are self-employed, you pay both the employee and employer portions yourself — 15.3% total — though you can deduct half of it on your tax return. The IRS calls this the self-employment tax, and you report it on Schedule SE when you file.

Key Takeaways

  • FICA withholds 7.65% from your paycheck: 6.2% for Social Security and 1.45% for Medicare, plus your employer pays an equal amount you do not see.
  • Social Security money funds retirement, disability, and survivor benefits for workers and their families, not general government spending.
  • Medicare money funds hospital insurance (Part A), medical insurance (Part B), and prescription drug coverage (Part D) for people 65 and older and some younger people with disabilities.
  • Self-employed people pay 15.3% total FICA tax and report it on Schedule SE, though they can deduct half the amount on their return.
  • There is a wage cap on Social Security tax — in 2024 you stop paying the 6.2% rate after earning $168,600 — but Medicare tax continues on all income above that.

How Social Security tax works and who it covers

The 6.2% Social Security portion funds three types of benefits. Retirement benefits go to workers who reach their full retirement age, which ranges from 66 to 67 depending on your birth year. Disability benefits go to workers under full retirement age who become unable to work, plus their spouses and children in some cases. Survivor benefits go to the family members of a worker who dies, including a spouse caring for children under 16 and unmarried children under 19 (or 22 if in school).

You earn Social Security credits by working and paying FICA tax. You need 40 credits to receive retirement or disability benefits — most people earn four credits per year, so 10 years of work is the minimum. The amount you receive later depends on how much you earned during your working years and when you claim benefits. Claiming at 62 gives you a smaller monthly payment than waiting until 70, when your payment is larger.

Social Security is a pay-as-you-go system. The taxes you pay today fund benefits for current retirees and disabled workers. When you retire, taxes paid by workers then will fund your benefits. This is why the program is sometimes called an "insurance" program — you are insuring against the risk of old age, disability, or death.

How Medicare tax works and who it covers

The 1.45% Medicare portion funds hospital insurance for people 65 and older, regardless of income or health history. Medicare Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health services. You do not pay a premium for Part A if you or your spouse paid Medicare tax for at least 10 years.

Medicare Part B covers doctor visits, outpatient care, and medical equipment. Part B requires a monthly premium, which is income-based — higher earners pay more. Medicare Part D covers prescription drugs and also requires a separate premium. Most people become may be able to access for Medicare at 65, but some younger people with disabilities or end-stage renal disease can receive it earlier.

Unlike Social Security, Medicare is not based on how much you earned. A person who paid Medicare tax for one year and a person who paid for 40 years receive the same Part A coverage at 65. The tax you pay now goes into the Medicare Hospital Insurance Trust Fund, which pays current beneficiaries' bills. When you turn 65, that same fund will pay yours.

The wage cap on Social Security but not Medicare

Social Security tax has a wage base limit, which means you only pay the 6.2% rate up to a certain income level each year. In 2024, that limit is $168,600. If you earn $200,000, you pay 6.2% on the first $168,600 and nothing on the remaining $31,400. The limit changes each year based on national wage trends — it was $160,200 in 2023 and will be different in 2025.

Medicare tax has no wage cap. You pay 1.45% on every dollar you earn, no matter how much that is. Additionally, if you earn over $200,000 as a single filer (or $250,000 married filing jointly), you pay an extra 0.9% Medicare tax on the income above that threshold. This additional tax was added in 2013 and funds the Affordable Care Act.

The wage cap means high earners pay a smaller percentage of their total income into Social Security than lower earners do. This is intentional — Social Security is designed to replace a higher percentage of income for lower-wage workers and a lower percentage for higher-wage workers.

What happens to FICA money after it is withheld

Your employer sends the FICA taxes withheld from your paycheck, plus the employer's matching portion, to the IRS within a set schedule — usually monthly or semi-weekly depending on the size of the payroll. The IRS deposits Social Security taxes into the Social Security Trust Fund and Medicare taxes into the Medicare Trust Fund. These are separate accounts managed by the Social Security Administration and the Centers for Medicare & Medicaid Services.

The trust funds pay out benefits to current recipients. If a trust fund takes in more money than it pays out in a given year, the surplus stays in the fund. If it pays out more than it takes in, the fund draws down its reserves. The Social Security Trust Fund has reserves that are projected to last until 2034 under current law, after which incoming tax revenue would cover about 80% of scheduled benefits. The Medicare Hospital Insurance Trust Fund has a different timeline and is monitored separately.

You can see how much FICA tax you have paid over your lifetime by creating an account at ssa.gov and viewing your Social Security Statement. This statement shows your earnings history and estimates what your benefits might be at different claiming ages.

FICA taxes for specific situations

If you work for a nonprofit organization, a government agency, or a religious organization, you may not pay FICA tax on that income. Some government employees have their own retirement systems instead. Railroad workers pay a similar but separate tax called the Railroad Retirement Tax Act (RRTA) tax. If you work for a foreign government or are a nonresident alien, different rules explore.

If you have multiple jobs, you pay FICA tax on all of them. You can end up paying more than the Social Security wage cap if your combined earnings exceed the limit across all employers. You can claim a credit on your tax return if this happens, but you have to file a return to get it — the IRS does not automatically refund the overpayment.

If you are a student working on campus at your school, you may be exempt from FICA tax on that income. Household employees (like nannies or housekeepers) are subject to FICA tax if they earn over a certain threshold, which varies by year. Your employer should tell you whether FICA applies to your job.

How FICA connects to your benefits later

The FICA taxes you pay now create a record of your earnings and your may be able to access for benefits. Social Security uses your 35 highest-earning years to calculate your benefit amount. If you have fewer than 35 years of earnings, zeros are counted for the missing years, which lowers your benefit. This is why people who take time out of the workforce for caregiving or unemployment may receive lower benefits.

For Medicare, paying FICA tax for at least 10 years qualifies you for Part A at no premium. If you have not worked that long, you can still buy into Medicare at 65, but you will pay a higher premium. Your FICA payment history does not affect the amount of your Medicare benefits — everyone with Part A coverage gets the same hospital benefits.

You can estimate your future Social Security benefit by visiting ssa.gov and using their benefit calculator. You can also create a my Social Security account to see your actual earnings record and get an official estimate. These tools show you how your FICA contributions translate into the benefits you will receive.

Frequently Asked Questions

Why do I pay FICA tax if Social Security might not have enough money when I retire?

FICA tax funds current benefits, not a personal account for your future. You are paying for today's retirees and disabled workers. When you retire, workers then will pay for your benefits. Even if the trust fund runs out of reserves, incoming tax revenue will still cover a portion of benefits — currently projected at about 80% under current law.

Can I opt out of paying FICA tax?

No, FICA tax is mandatory for almost all workers. Some government employees and nonprofit workers have exemptions, but most people cannot opt out. If you are self-employed, you must pay self-employment tax on net earnings over $400.

Does FICA tax count toward my income tax?

No. FICA is a separate payroll tax from federal income tax withholding. Both are deducted from your paycheck, but they fund different programs and are reported separately. FICA funds Social Security and Medicare. Income tax funds general government operations.

What if I paid too much Social Security tax because I had multiple jobs?

You can claim a credit on your tax return. When you file, the IRS will calculate whether you overpaid based on the wage cap and issue a refund or credit the amount to taxes owed. You must file a return to receive this — the IRS does not automatically refund it.

Do I get FICA tax back if I leave the country?

No. FICA tax is not refundable based on where you live. If you are a nonresident alien or work for a foreign government, different rules may explore to whether you pay FICA at all, but if you did pay it, you cannot get it back straightforward by leaving the United States.