Guide
Look at any pay stub and you'll see a line — sometimes labeled "FICA," sometimes split into "Social Security" and "Medicare" — quietly removing about 7.65% of your pay. It's one of the most consistent deductions there is, and one of the least explained. Here's what FICA actually is and why it comes out no matter your tax bracket.
FICA is the Federal Insurance Contributions Act. It's not income tax — it's a dedicated payroll tax that funds two specific programs: Social Security (retirement, disability, and survivor benefits) and Medicare (health coverage for people 65+). When you pay FICA, you're paying into the same system that will eventually pay you.
| Component | Rate (you) | Applies to |
|---|---|---|
| Social Security | 6.2% | Earnings up to the annual wage cap |
| Medicare | 1.45% | All earnings, no cap |
| Total FICA | 7.65% | — |
Your employer pays a matching 7.65% on your behalf, so the government actually collects 15.3% total on your wages — you just only see half of it. Economists often note that the employer's share is effectively part of your compensation too: money that could have gone toward higher wages instead flows into the payroll-tax system. You never see it on your stub, but it is part of the true cost of your job.
One thing that trips people up: FICA is calculated on your gross wages, not on your taxable income after the standard deduction. That is different from federal income tax. It also means most pre-tax benefit choices that lower your income tax — like a traditional 401(k) contribution — do not reduce the Social Security and Medicare tax you owe. A few specific deductions (such as health insurance premiums and HSA contributions run through a Section 125 "cafeteria" plan) can lower FICA wages, but retirement contributions generally cannot.
Social Security tax only applies up to an annual earnings limit (the "wage base"), which the Social Security Administration adjusts most years to keep pace with average wage growth. Once your year-to-date earnings pass that cap, the 6.2% stops for the rest of the year — which is why some high earners notice their paychecks getting slightly bigger late in the year. Medicare's 1.45% has no such cap; it applies to every dollar you earn. Check the current wage base directly with the SSA, since the number changes annually.
The wage cap is also why Social Security is sometimes described as a "regressive" tax at the very top of the income scale: someone earning many times the cap pays the 6.2% on only a portion of their total pay, while someone earning below the cap pays it on every dollar. For the vast majority of workers whose income sits under the wage base, though, the full 6.2% applies all year long.
If you earn above a threshold ($200,000 for single filers), an additional 0.9% Medicare tax applies to earnings over that line. It's only the employee's responsibility — employers don't match this piece. Most workers never hit it, but it explains a slightly larger Medicare line for high earners.
If you freelance or run your own business, there's no employer to pay the matching half — so you owe the full 15.3% yourself, known as self-employment tax. It's the single biggest surprise for new freelancers, and the reason setting aside 25–30% of self-employment income for taxes is a common rule of thumb. The IRS does soften the blow slightly: you can deduct the "employer half" of your self-employment tax when calculating your income tax, and self-employment tax is figured on roughly 92.35% of your net business earnings rather than the full amount. Even so, it lands as a large, unfamiliar bill for people used to seeing FICA quietly withheld for them.
Suppose Maria earns a $60,000 salary as an employee, paid semi-monthly (24 checks a year). Assume her whole salary falls under the Social Security wage cap. Here is how FICA works out:
| Component | Rate | Annual | Per paycheck (÷24) |
|---|---|---|---|
| Social Security | 6.2% | $3,720 | $155.00 |
| Medicare | 1.45% | $870 | $36.25 |
| Total FICA | 7.65% | $4,590 | $191.25 |
So about $191 of every $2,500 gross paycheck disappears to FICA alone — before a single dollar of federal or state income tax is calculated. Maria's employer separately pays another $4,590 in matching tax that never appears on her stub. If Maria were self-employed earning the same $60,000, she would owe roughly double this amount as self-employment tax (on about 92.35% of her net earnings), which is why freelancers set so much aside.
The paycheck calculator breaks out your exact Social Security and Medicare amounts alongside federal and state tax, so you can see how much of your check FICA is really taking.
Can I lower my FICA tax? Not by much. Unlike income tax, FICA isn't affected by your W-4 or by traditional 401(k) contributions. Certain benefits run through a cafeteria plan — like pre-tax health premiums and HSA contributions — can reduce the wages FICA applies to, but for most people FICA comes off the top no matter what.
Do I get the FICA money back? It isn't refunded like over-withheld income tax. Instead, your Social Security and Medicare taxes fund benefits you become eligible for later — retirement, disability, and Medicare coverage. In that sense you are paying into a system that is designed to pay you back over time, according to the SSA.
Why did my Social Security tax stop late in the year? If your year-to-date earnings crossed the annual Social Security wage cap, the 6.2% stops for the rest of the calendar year. Medicare's 1.45% keeps applying to every dollar with no cap, so only the Social Security portion pauses.
→ See your FICA breakdown