FICA is the tax that funds Social Security and Medicare. It takes 7.65% of your paycheck before you ever see the money — 6.2% for Social Security and 1.45% for Medicare. Your employer quietly matches every dollar, so the government collects 15.3% in total on your wages.
FICA stands for the Federal Insurance Contributions Act, the 1935 law that created America's payroll tax. If you've ever wondered "FICA is what tax, exactly?" — it's not one tax but two, bundled together on every pay stub: the Social Security tax (officially OASDI, for Old-Age, Survivors, and Disability Insurance) and the Medicare hospital insurance tax.
Unlike federal income tax, which goes into the general federal budget, FICA taxes are earmarked. Your Social Security tax goes into the Social Security trust funds that pay benefits to retirees, disabled workers, and survivors. Your Medicare tax funds hospital coverage for Americans 65 and older. That earmarking is why FICA is sometimes called a "contribution" — you earn future benefits with every dollar paid in.
You won't find FICA on a tax return the way you find income tax — most of the paperwork is invisible to you. Your employer withholds it each pay period, sends it to the IRS along with their matching half, and reports your yearly totals on your W-2 in Boxes 3 through 6: Box 3 is Social Security wages, Box 4 is the Social Security tax withheld, Box 5 is Medicare wages, and Box 6 is the Medicare tax withheld. A quick glance at those boxes tells you exactly what FICA cost you for the year.
The 7.65% employee FICA rate is two rates stacked together. Social Security takes 6.2% of wages, but only up to the annual wage base — $184,500 in 2026. Earn $184,500 or more in a year, and the Social Security line on your pay stub drops to zero for the rest of the year (a nice late-year surprise for high earners). Medicare takes 1.45% on every dollar of wages with no cap, no matter how much you make.
Then there's the quiet second half of FICA: your employer matches your 7.65% dollar for dollar. So while you lose 7.65% of each paycheck, the federal government actually collects 15.3% of your wages — your half plus your employer's half. You're paying for both sides in a sense, since economists generally agree that employer payroll taxes come out of what workers would otherwise earn, but the match is why hiring someone costs a company more than their salary.
A small naming trap: some pay stubs label these as "OASDI" and "HI" — Old-Age, Survivors, and Disability Insurance, and Hospital Insurance. They're the same two taxes. If your stub shows a single "FICA" line of exactly 7.65% of gross wages, it's just the sum of both. And if the number looks slightly off, that's usually pre-tax deductions (like health premiums or 401(k)) shrinking the wage base FICA is calculated on.
Here's what FICA looks like in real numbers. Say you earn $65,000 a year, paid biweekly — that's $2,500 gross per check.
Social Security: $2,500 × 6.2% = $155.00. Medicare: $2,500 × 1.45% = $36.25. Total FICA: $191.25 per paycheck, or $4,972.50 a year. Your employer sends another $4,972.50 on your behalf, so the total payroll tax on your work is $9,945 a year — money that funds retirees' benefits today and credits toward your own future benefits.
Compare that to someone earning $250,000 in 2026. Their Social Security tax stops once their cumulative wages pass $184,500 (around late October), but Medicare keeps going. And wages above $200,000 get hit with an additional 0.9% Medicare tax — employee-only, no employer match. So the effective FICA rate falls for high earners on the Social Security side, then rises slightly on the Medicare side. This is the detail most pay stubs never explain.
Now zoom out to the annual picture. On $65,000, your FICA totals $4,972.50 for the year — 7.65% of your wages, because you're under the $184,500 wage base so every dollar gets hit. Someone earning $500,000 pays Social Security tax on only the first $184,500 ($11,439), then Medicare's 1.45% on the full $500,000 ($7,250) plus the 0.9% extra on the $300,000 over $200,000 ($2,700). Their effective FICA rate lands around 4.3% — well below your 7.65%. That's the regressive edge the wage base creates, and it's why payroll tax reform is a perennial debate.
People mix these up constantly. Federal income tax is progressive — it taxes higher income at higher marginal rates (10% to 37% in 2026), and you can shrink it with the $16,100 standard deduction, credits, and retirement contributions. FICA is flat — same rate from the first dollar, no deductions, no personal exemption. You can't lower FICA with a 401(k) contribution or itemized deductions (well, 401(k) contributions actually reduce FICA too — a rare exception most people miss; IRA contributions don't).
This flatness is why FICA is regressive: it eats a bigger share of a low earner's income than a high earner's, since the Social Security cap shelters wages above $184,500. That design tension — regressive tax funding progressive benefits — is the oldest argument in Social Security policy. You don't need to take a side, but knowing the difference helps you read your pay stub like someone who understands where the money goes.
The other practical difference: FICA has no withholding allowances, no W-4 games to play. With income tax, you can adjust your W-4 to withhold more or less through the year and settle up in April. FICA is automatic and exact — 7.65% of each check, no refunds for overpayment on the employee side (overpaid Social Security tax across multiple employers is the one exception, claimed as a credit on your return). What leaves your paycheck is exactly what you owe, which is why the number never moves unless your wages or the annual limits do.
If you freelance or run your own business, there's no employer to match you — so you pay the full 15.3% yourself, called the self-employment tax. That's 12.4% for Social Security (up to the $184,500 wage base) plus 2.9% for Medicare on all net earnings, plus the same 0.9% additional Medicare tax over $200,000.
The one break: you can deduct half of your self-employment tax on your income tax return (the "employer half"), which lowers your income tax even though it doesn't lower FICA itself. If you're a W-2 employee with a side business, the wage base is shared — your combined wages and net self-employment earnings stop the Social Security tax once they pass $184,500 total. Quarterly estimated payments are where most freelancers first feel the 15.3% sting, so plan for it rather than discovering it at tax time.
Here's a concrete freelance example. A designer nets $100,000 in self-employment income: Social Security tax is 12.4% of $100,000 = $12,400, Medicare is 2.9% = $2,900, for a total of $15,300 — versus $7,650 an employee would pay on the same pay. She then deducts $7,650 (half) on her income tax return, saving maybe $1,683 at a 22% marginal rate. The net FICA burden is still higher than an employee's, which is why freelancers often route income through an S-corporation or budget the 15.3% into every invoice.
FICA isn't money disappearing into a void — it's tracked. The Social Security Administration records your yearly earnings and credits (up to 4 per year; in 2026 each $1,730 of earnings buys one credit). Your eventual Social Security benefit is calculated from your highest 35 years of indexed earnings, which is why a year of zeros from gig work or time out of the workforce genuinely lowers your future check.
Medicare's payoff is eligibility: 40 credits (roughly 10 years of work) gets you premium-free Part A hospital coverage at 65. Every year of FICA payments moves that counter. This is the answer to "why should I care what FICA is": it's the only tax where the receipt is a personal ledger of benefits you'll collect later. You can view yours any time at the Social Security Administration's website — and if the earnings record is wrong, fixing it early is far easier than after you file for benefits.
Think of FICA less as a tax and more as a personal ledger: credits earned, eligibility building, earnings history recorded. It's the one pay-stub line that comes back to you later.
Pay stubs rarely print the word "FICA." Instead you'll see lines like "SS," "OASDI," or "Social Security" (your 6.2%) and "Med," "HI," or "Medicare" (your 1.45%). Some stubs combine them into one "FICA" line. If you see "Addl Med" or "Medicare Surtax," that's the 0.9% extra kicking in because your year-to-date wages passed $200,000.
One quirk: the additional Medicare tax is calculated per employer, based on your year-to-date pay there. Two jobs at $150,000 each means neither withholds the 0.9% — but you still owe it on the $100,000 over the $200,000 threshold at filing time. A small trap that surprises dual-income high earners.
If your stub shows FICA as one combined line, dividing it by 0.0765 should roughly equal your gross pay — a handy sanity check. A bigger mismatch means pre-tax items are involved or something is genuinely off, and payroll errors do happen. Compare your year-to-date FICA against 7.65% of year-to-date gross wages at least once a year; catching a withholding mistake in October beats discovering it on your W-2 in January.
FICA stands for the Federal Insurance Contributions Act, the 1935 law behind the payroll tax. It covers two taxes: Social Security (OASDI) at 6.2% and Medicare hospital insurance at 1.45%, for a combined 7.65% employee rate on every paycheck.
Employees pay 7.65%: 6.2% for Social Security on wages up to the $184,500 wage base, plus 1.45% for Medicare on all wages. Employers match it dollar for dollar. Wages over $200,000 face an extra 0.9% Medicare tax paid only by the employee.
FICA funds specific programs: your Social Security tax goes into the trust funds that pay benefits to retirees, disabled workers, and survivors, and your Medicare tax funds hospital insurance for Americans 65 and older. Every dollar paid in also earns you credit toward your own future benefits.
No. Federal income tax is progressive (10% to 37% in 2026) and can be reduced with deductions and credits; FICA is a flat 7.65% on wages from the first dollar with no personal exemption. They fund different things and appear as separate lines on your pay stub.
The Social Security half (6.2%) stops once your wages reach $184,500 in 2026 — the annual wage base. The Medicare half (1.45%) never stops, and wages above $200,000 get an additional 0.9% Medicare tax. If you're self-employed, the same caps apply to your net earnings.
Mostly no — FICA applies to wages before deductions and can't be lowered by itemizing. The main exceptions: 401(k) contributions reduce taxable wages for FICA purposes (IRA contributions don't), and HSAs funded through payroll also escape FICA. Beyond that, the flat rate is simply the cost of the system.