What Is FICA Tax? A Plain-English Explanation

Almost every paycheck in America has a line labeled "FICA," and almost nobody knows exactly what it means beyond "a tax that comes out." Here's what it actually is, how it's calculated, and where the money goes.

What FICA stands for

FICA stands for the Federal Insurance Contributions Act — the law that funds Social Security and Medicare. It's not one tax, but two, bundled together on your pay stub:

  1. Social Security tax (OASDI) — funds retirement, disability, and survivor benefits
  2. Medicare tax — funds hospital insurance for people 65+ and certain disabled individuals

How much FICA actually costs you

For 2026:

TaxRateWage cap
Social Security6.2%$184,500
Medicare1.45%No cap
Additional Medicare0.9%Applies above $200,000 (single) / $250,000 (MFJ)

Combined, most employees pay 7.65% of every paycheck to FICA — until they cross the Social Security wage cap, at which point only the 1.45% Medicare portion continues.

Worked example

On a $2,000 biweekly paycheck:

  • Social Security: 6.2% × $2,000 = $124.00
  • Medicare: 1.45% × $2,000 = $29.00
  • Total FICA: $153.00 per paycheck

Over a full year at that pay rate ($52,000 salary), that's $3,978 in FICA taxes — separate from federal and state income tax.

Why there's a Social Security wage cap but no Medicare cap

Social Security benefits are calculated based on your lifetime earnings, up to the cap — so the tax only applies up to the same limit that counts toward your future benefit. Once your wages for the year exceed $184,500 in 2026, Social Security tax stops coming out of your paycheck for the rest of the calendar year (it resets each January 1).

Medicare has no cap, and high earners actually pay more — an additional 0.9% kicks in above $200,000 (single) or $250,000 (married filing jointly), with no corresponding boost to future benefits.

Does your employer pay FICA too?

Yes — your employer matches your FICA contribution dollar-for-dollar (with the exception of the 0.9% Additional Medicare Tax, which only applies to the employee). So a combined 15.3% of your wages (up to the Social Security cap) actually goes toward Social Security and Medicare between you and your employer, even though only 7.65% comes out of your paycheck.

If you're self-employed, you pay both halves yourself — 15.3% total — which is why self-employment tax often comes as a surprise to new freelancers and contractors.

See how FICA affects your specific paycheck

FICA is calculated the same way for nearly everyone, but it interacts with your overall take-home pay differently depending on income level and filing status. Use the PayGauge paycheck calculator to see your exact FICA withholding alongside every other deduction on your paycheck.

Comments

Post a Comment

Popular posts from this blog

How to Read Your Paycheck: Every Line Item Explained

 A pay stub packs a lot of abbreviations and numbers into a small space, and most people only really look at the final total. Here's what every common line actually means, so the rest of it stops being a mystery. Earnings section Gross pay — your total earnings for the pay period before anything is taken out Regular hours/rate — your standard hourly rate and hours worked (hourly employees) or salary portion for the period (salaried employees) Overtime (OT) — hours worked beyond 40/week, typically paid at 1.5x your regular rate YTD (Year-to-Date) — the running total of that figure for the calendar year so far, useful for tracking toward annual limits like the Social Security wage cap Tax withholding section Federal income tax (Fed W/H or FIT) — federal tax withheld based on your W-4 elections and IRS withholding tables State income tax (State W/H or SIT) — state tax withheld, if your state has one Local tax — city or county-level income tax, where applicable ...
Read more

2027 Social Security Wage Base: How It Changes Your Paycheck

On October 14, 2026, the Social Security Administration announced its 2027 numbers. The one that matters for paychecks is the wage base , the maximum amount of earnings subject to Social Security tax. It rises from $184,500 in 2026 to $192,300 in 2027 . If you earn less than $184,500, nothing changes for you. If you earn more, you will pay a little more Social Security tax next year. Here is the math. The key numbers 2026 2027 Social Security wage base $184,500 $192,300 Social Security tax rate (employee) 6.2% 6.2% Maximum employee Social Security tax $11,439 $11,922.60 Medicare tax rate 1.45% 1.45% Additional Medicare tax 0.9% above $200,000 (single) 0.9% above $200,000 (single) The maximum employee tax goes up by $483.60 a year. Your employer pays a matching amount. Who is affected Only earnings between the old and new cap are newly taxed. That means: Under $184,500: no change in Social Security tax. 6.2% of your pay is still 6.2% of your pay. Between $184,500 and $...
Read more

What Is Federal Income Tax Withholding?

Federal income tax withholding is the single biggest line item on most paychecks, and also one of the least understood. Here's what it actually is, how it's calculated, and why it can change even when your salary doesn't. What federal withholding actually is Federal income tax withholding is money your employer sends directly to the IRS on your behalf, throughout the year, as an advance payment toward your annual tax bill. It's not a separate tax — it's a prepayment of the same federal income tax you'll calculate when you file your return. At tax time, whatever was withheld is compared to what you actually owe: too much withheld means a refund, too little means you owe the difference. What determines how much is withheld Your employer calculates withholding based on: Your gross pay for that pay period Your filing status (single, married filing jointly, head of household) Your W-4 elections — including dependents claimed and any additional withhol...
Read more