What Is FICA Tax? (2026 Rates, Limits & How Much You Pay)

FICA Tax Explained: The Tax on Every Pay Stub

Open almost any American pay stub and you will find a line labeled "FICA," "SS," "Medicare," or "OASDI" quietly shrinking your gross pay. FICA stands for the Federal Insurance Contributions Act, the law that funds the two largest federal social insurance programs: Social Security and Medicare. Social Security pays monthly benefits to retirees, disabled workers, and surviving family members. Medicare's Hospital Insurance program helps cover healthcare costs for Americans age 65 and older and for certain younger people with disabilities.

Unlike federal income tax, which is calculated once a year on a return and adjusted by deductions, credits, and filing status, FICA is a flat payroll tax. Your employer withholds it from every single paycheck at a fixed percentage, deposits it with the IRS along with the employer's matching share, and reports the totals on your W-2 at year-end. There is no FICA "return" to file and no standard deduction that shelters your first dollars of wages. The very first dollar you earn at a job is subject to FICA in the same way as the hundred-thousandth dollar — up to one important cap on the Social Security side, explained below.

For most employees, FICA is also completely automatic and invisible until payday. You cannot opt out of it, you generally cannot reduce it with a W-4 adjustment, and it applies to wages, salaries, tips, bonuses, and most other cash compensation. Understanding how it works is the first step to understanding why your take-home pay is what it is — and our 2026 paycheck calculator shows the exact FICA amount withheld from any salary.

The Two Parts of FICA: Social Security and Medicare

FICA is really two separate taxes bundled into one line item. They have different rates, different rules, and — critically — different limits. Here is the full 2026 breakdown:

The Social Security tax is 6.2% of your wages, but only up to the annual wage base — $184,500 in 2026. Multiply the two and you get the maximum possible employee Social Security tax for the year: $11,439. Once your year-to-date wages pass the cap, the 6.2% withholding simply stops for the rest of the calendar year. The Medicare tax, by contrast, is 1.45% of every dollar of wages with no ceiling at all. A worker earning $40,000 and a worker earning $400,000 both pay Medicare tax on 100% of their pay.

Your employer pays exactly the same amounts on top of your wages: another 6.2% for Social Security (up to the same $184,500 cap per employee) and another 1.45% for Medicare. That means the true cost of FICA on a typical paycheck is 15.3% of wages — half visible on your pay stub and half paid invisibly by your employer. The one exception is the Additional Medicare Tax, which is employee-only and has no employer match.

How Much FICA Tax Comes Out of Your Paycheck?

Because the standard rate is a flat 7.65% until the Social Security cap kicks in, estimating your own FICA withholding is simple multiplication. Two examples show how the tax behaves at very different income levels:

Notice the pattern: FICA is proportional for most workers, then becomes less burdensome as a share of income once earnings pass the Social Security wage base. This is why high earners often see their paychecks get noticeably bigger late in the year — a phenomenon we break down in detail in our Social Security tax limit 2026 guide.

FICA on Your Pay Stub and W-2

On your pay stub, FICA withholding may appear as separate lines ("Social Security," "Medicare," "OASDI," "FICA-SS," "FICA-Med") or as a single combined FICA figure, depending on your payroll provider. Either way, the year-end record that matters is your Form W-2, which reports FICA in two dedicated boxes:

• Box 3 shows your total Social Security wages (capped at $184,500 for 2026), and Box 4 shows the Social Security tax actually withheld — it should never exceed $11,439.
• Box 5 shows your Medicare wages (usually equal to your full wages, with no cap), and Box 6 shows the Medicare tax withheld, including any Additional Medicare Tax.

Checking Boxes 4 and 6 each January is a smart habit. If Box 4 shows more than $11,439 and you had only one employer, your payroll department made an error and should correct it. If you had two or more employers, the excess is normal — and refundable, as explained below. For a full walkthrough of every deduction line, see our guide on how to read your pay stub deductions.

High Earners: The Wage Cap and the Additional Medicare Tax

Above the standard 7.65%, two special rules shape FICA for high earners. The first is friendly: the Social Security wage cap. Once your cumulative 2026 wages from an employer reach $184,500, that employer stops withholding the 6.2% Social Security tax entirely. Medicare's 1.45% continues on every dollar, but the disappearance of the 6.2% charge functions like an automatic late-year raise.

The second rule cuts the other way. The Additional Medicare Tax adds an extra 0.9% on wages above these thresholds, based on filing status:

• $200,000 — single filers and heads of household
• $250,000 — married filing jointly
• $125,000 — married filing separately

There is an important mechanical quirk here. Employers are required to start withholding the extra 0.9% as soon as your wages from that employer pass $200,000 in the year — regardless of your actual filing status or your spouse's income. That means a married worker earning $210,000 may have the tax withheld even though the couple's joint threshold is $250,000 and they ultimately owe nothing extra. The reverse also happens: two spouses earning $180,000 each owe the tax jointly but neither employer withholds it. Everything is squared up at tax time on Form 8959, which calculates the true Additional Medicare Tax liability and credits any withholding against it. Unlike regular FICA, the Additional Medicare Tax has no employer match.

Self-Employed? You Pay FICA's Twin: SECA Tax

Freelancers, independent contractors, and sole proprietors do not have an employer to split FICA with — so they pay both halves themselves under a parallel system called SECA (the Self-Employment Contributions Act). The combined SECA rate is 15.3% — the same 12.4% Social Security (up to the same $184,500 wage base) and 2.9% Medicare — applied to 92.35% of net self-employment earnings. The 92.35% factor mirrors the fact that employees never pay FICA on their employer's half of the tax.

Two features soften the blow. First, self-employed workers can deduct the employer-equivalent half of their SECA tax (effectively 7.65% of the tax) as an adjustment to income on their tax return. Second, because there is no employer withholding, SECA is paid through quarterly estimated tax payments alongside income tax — our quarterly estimated taxes 2026 guide walks through the deadlines, safe-harbor rules, and how to calculate each payment so you avoid underpayment penalties.

FICA Tax vs. Federal Income Tax: Key Differences

The most common FICA confusion is treating it as just another name for income tax. They are separate taxes, calculated in completely different ways, and the difference explains several surprises at tax time:

The practical consequences matter. Because FICA has no standard deduction, a part-time worker who owes zero income tax still pays the full 7.65% FICA on every paycheck. And because FICA withholding is not reconciled against deductions and credits, there is generally no refund of Medicare tax even if it was withheld from wages you might think were "too low to tax." The single major exception involves Social Security tax withheld by multiple employers.

Overpaid Social Security Tax With Two Jobs: How the Refund Works

Each employer applies the $184,500 wage cap independently, without knowing what your other employers paid you. Work two good jobs in the same year and you can easily have Social Security tax withheld on combined wages far above the cap. Example: Job A pays $130,000 and Job B pays $110,000 — combined wages of $240,000. Together the employers withhold 6.2% on the full $240,000 across both jobs, but your legal maximum Social Security tax for 2026 is only $11,439. The difference is yours to reclaim.

You do not ask either employer for this money back. Instead, when you file your federal tax return, the excess Social Security withholding is claimed as a payment — it is added to your other withholding and credited on Form 1040 (via Schedule 3), increasing your refund or reducing your balance due dollar for dollar. Note the limits of this rule: it applies only to the Social Security portion, only when two or more employers are involved, and never to Medicare tax. If a single employer over-withholds Social Security tax by mistake, that employer — not the IRS — must fix it through a payroll adjustment.

Who Is Exempt From FICA?

Almost every employee in the United States pays FICA, but a few narrow exceptions exist. Certain student employees working for the school, college, or university they attend may qualify for the student FICA exemption. Railroad workers are covered by a separate system (the Railroad Retirement Tax Act, or RRTA) instead of FICA. Some state and local government employees who belong to qualifying public retirement systems are exempt from the Social Security portion, though Medicare tax generally still applies. These exceptions are specific and fact-dependent — when in doubt, assume FICA applies.

Frequently Asked Questions (FAQ)

Explore Related Payroll Tax Guides

Go deeper on the taxes that shape your paycheck: