FICA takes 15.3% of your wages, split between you and your employer

FICA (Federal Insurance Contributions Act) taxes fund Social Security and Medicare. The total rate is 15.3%, but you only see half of it on your paycheck. Your employer pays the other half directly to the government without it touching your account.

On your end, you pay 7.65% of your gross wages. That breaks into 6.2% for Social Security and 1.45% for Medicare. Your employer matches both amounts. If you are self-employed, you pay the full 15.3% yourself, though you can deduct half of it when you file taxes.

The amount you pay changes each year because it is calculated on your actual earnings. A person earning $30,000 annually pays less in total dollars than someone earning $60,000, even though the percentage stays the same — until you hit the Social Security wage cap.

Key Takeaways

  • You pay 7.65% of your wages to FICA; your employer pays another 7.65% on your behalf.
  • Social Security tax (6.2%) only applies to earnings up to a certain limit, which changes yearly; Medicare tax (1.45%) has no wage cap.
  • Self-employed workers pay the full 15.3% themselves but can deduct half when filing taxes.
  • FICA is withheld automatically from your paycheck before you receive it, so the amount you take home is already reduced.

How the Social Security portion works differently than Medicare

Social Security tax stops once you earn past a wage cap. In 2024, that cap is $168,600 — meaning if you earn $200,000, you only pay Social Security tax on the first $168,600. The cap changes each year based on wage growth. Once you hit it, no more Social Security tax comes out of your paycheck for the rest of that year.

Medicare tax has no cap. You pay 1.45% on every dollar you earn, no matter how much you make. However, there is an additional 0.9% Medicare tax on wages above $200,000 (for single filers) or $250,000 (for married filing jointly). This extra tax was added in 2013 and applies to both employees and self-employed workers.

The difference matters most for high earners. Someone making $500,000 stops paying Social Security tax partway through the year but continues paying Medicare tax on every dollar, plus the extra 0.9% on the amount over the threshold.

What your paycheck stub actually shows

Your pay stub lists FICA taxes in two or three lines. You will see "Social Security" or "OASDI" (Old-Age, Survivors, and Disability Insurance) showing 6.2% of your gross pay. Below that is "Medicare" showing 1.45%. If you earn over the threshold for your filing status, a third line labeled "Medicare Additional Tax" or "Additional Medicare Tax" shows the extra 0.9%.

These amounts are subtracted from your gross pay before you see your net (take-home) amount. If you earned $2,000 in a pay period and have not hit the Social Security cap, you would see roughly $124 withheld for Social Security (6.2% of $2,000) and $29 for Medicare (1.45% of $2,000), totaling $153 in FICA taxes on that check alone.

The stub also shows your employer's share, though that money never appears in your account — it goes straight to the government. Seeing the employer match can help you understand the full cost of employing you, which is useful context if you are self-employed and calculating what you owe.

Self-employed workers and the 15.3% rate

If you are self-employed, you pay both the employee and employer portions of FICA, totaling 15.3%. This applies to your net self-employment income (your business income minus deductible business expenses). You calculate this on Schedule SE when you file your tax return.

The self-employment tax is due when you file your return or when you make quarterly estimated tax payments throughout the year. Many self-employed people pay quarterly to avoid a large bill in April. The IRS provides Form 1040-ES to help you calculate what to send each quarter.

The one relief: when you file your return, you can deduct half of your self-employment tax as an adjustment to income. This reduces your taxable income, which lowers your federal income tax bill. You still pay the full 15.3% in FICA, but the deduction provides some offset.

How the wage cap affects high earners

The Social Security wage cap exists because Social Security benefits are capped — the program is designed to replace a percentage of your earnings up to a certain level, not to provide unlimited benefits to high earners. The cap rises each year when average wages in the country rise.

If you change jobs mid-year, you might hit the cap with one employer, then start over with a new employer. In that case, you could overpay Social Security tax. When you file your tax return, you claim a credit for the overpayment, and the IRS refunds it. This happens automatically if you file electronically.

The additional 0.9% Medicare tax has no cap and no relief — once you cross the income threshold for your filing status, you pay it on every dollar above that point for the rest of the year and every year after.

Why FICA amounts vary from paycheck to paycheck

Your FICA withholding stays the same percentage each pay period, but the dollar amount changes if your pay changes. A bonus, overtime, or a pay cut all shift the amount withheld. If you receive a large bonus in one pay period, that check will show higher FICA taxes in dollars, even though the percentage is identical.

Bonuses can also push you closer to or past the Social Security wage cap. If you are near the cap and receive a large bonus, some of that bonus may not be subject to Social Security tax, which means your FICA withholding will be lower than usual for that check.

If you have multiple jobs, each employer withholds FICA independently. You could hit the Social Security cap with one job, then start fresh with a second job, potentially overpaying. Again, you claim the overpayment when you file your return.

Frequently Asked Questions

Can I opt out of paying FICA taxes?

No. FICA taxes are mandatory for all employees and self-employed workers. The only exceptions are certain religious groups with IRS approval and some government employees hired before specific dates. If you are a regular employee or self-employed, you cannot avoid FICA.

What happens if I overpay Social Security tax?

If you hit the wage cap with one employer and then earn more with another employer, you overpay. When you file your tax return, the IRS automatically refunds the overpayment if you file electronically, or you claim it as a credit on your return. You do not need to contact the IRS separately.

Does FICA tax count toward my federal income tax?

No. FICA and federal income tax are separate. FICA funds Social Security and Medicare. Federal income tax funds general government operations. Both are withheld from your paycheck, but they go to different places and are calculated differently.

Why do I pay FICA if I might not collect Social Security?

FICA funds not just retirement benefits but also survivor benefits (for your family if you die) and disability benefits. Even if you never collect retirement, your family could receive survivor benefits, and you could receive disability benefits if you become unable to work.

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, or capital gains. If you have a job and also earn money from investments, only the job income is subject to FICA.