What Is FICA Tax? Rates, How It’s Calculated & Where the Money Goes SEO

Look at any pay stub and one line tends to generate more questions than everything else on the page combined: FICA. It’s not immediately obvious what it stands for, why it’s split into two pieces, or why the number never quite matches what a person expects. Unlike federal income tax, which at least sounds like what it is, FICA arrives as an acronym with no explanation attached, quietly taking a bite out of every paycheck since long before most of today’s workers were born.

The acronym stands for the Federal Insurance Contributions Act — a 1935 law, passed the same year as the Social Security Act, that created the funding mechanism for Social Security and, decades later, Medicare. That word “Contributions” isn’t an accident. Legally, FICA was structured as a contribution to a specific insurance-style trust fund rather than general tax revenue, which is part of why Social Security has historically been described as something workers pay into rather than a tax they simply owe. Whether that distinction still feels meaningful almost a century later is a fair question — but it explains the name, and the name is where most people’s confusion starts.

This guide covers what FICA tax actually is, exactly how the 2026 rates work for employees, employers, and the self-employed, where the wage base cap comes from and why it matters, a full worked paycheck example, and how FICA connects to bigger decisions like business structure and worker classification.

(A quick note: this article explains how FICA generally works and reflects confirmed 2026 figures at the time of writing. It isn’t formal tax advice — payroll tax rules have real compliance consequences, so confirm your specific situation with a CPA or directly at IRS.gov.)

What Is FICA Tax?

FICA tax is the combined Social Security and Medicare tax withheld from employee wages and matched by employers, funding two specific federal programs rather than the government’s general budget. It’s not a single tax — it’s two taxes bundled under one name:

• The Social Security portion (officially Old-Age, Survivors, and Disability Insurance, or OASDI) funds retirement benefits, survivor benefits for family members of deceased workers, and disability benefits.
• The Medicare portion (Hospital Insurance, or HI) funds Medicare Part A, which covers hospital care for people 65 and older and certain people with disabilities.

Every W-2 employee in the United States pays both, automatically, through payroll withholding — there’s no opting out, no threshold below which it doesn’t apply, and no separate form to fill out to trigger it. It simply starts with your first paycheck.

What Does FICA Actually Pay For? Following the Money

Most explanations of FICA stop at “it funds Social Security and Medicare” without saying what that means mechanically, which is exactly why it can feel abstract. Here’s the more concrete version: FICA withholding doesn’t go into a general pot alongside income tax. It’s earmarked and deposited into two specific trust funds managed by the U.S. Treasury:

• The Old-Age and Survivors Insurance (OASI) Trust Fund and the Disability Insurance (DI) Trust Fund — together, what people usually just call “the Social Security Trust Fund” — receive the Social Security portion.
• The Hospital Insurance (HI) Trust Fund receives the Medicare portion.

Money flowing into these funds today is what pays benefits to current retirees, disabled workers, and Medicare enrollees today — it’s a pay-as-you-go system, not a personal account with your name on it that accumulates your own contributions for your own future use. That’s a genuinely different structure than a 401(k) or IRA, and it’s worth understanding precisely because it explains why the wage base cap (covered below) and the long-running political debate about Social Security’s solvency both center on this exact mechanism: today’s workers’ FICA withholding is funding today’s beneficiaries, not a personal reserve.

FICA Tax Rates for 2026

The rates themselves have been stable for years — what changes annually is the wage base cap, covered in the next section. Here’s the full breakdown:

An employee never sees the employer’s half — it’s not deducted from their pay, it’s an additional cost the employer covers separately. That’s a detail worth sitting with for a second: for every dollar of Social Security and Medicare tax withheld from a paycheck, the employer is quietly paying a matching dollar that never appears on the employee’s pay stub at all. The full economic cost of FICA on a $1,000 paycheck isn’t $76.50 (the employee’s share) — it’s $153 once the employer’s invisible match is counted.

The Social Security Wage Base: Why FICA Isn’t Unlimited

Here’s the detail that catches people off guard the first time they notice it: at some point in the year, Social Security tax stops being withheld from a high enough earner’s paycheck entirely. That’s not a payroll error — it’s the Social Security wage base, an annual income cap above which no further Social Security tax is owed for the rest of the year.

For 2026, that cap is $184,500, up from $176,100 in 2025 — an increase confirmed by the Social Security Administration and reflected in the IRS’s own guidance on Social Security and Medicare withholding rates. Once an employee’s year-to-date wages cross $184,500, Social Security withholding stops for the remainder of the calendar year — meaning the maximum possible Social Security tax any single employee pays in 2026 is $184,500 × 6.2%, or $11,439.

Medicare has no wage base at all. The 1.45% Medicare rate applies to every dollar of wages, no matter how high total earnings climb for the year — a distinction that becomes especially relevant once the Additional Medicare Tax (below) enters the picture.

Why does this cap exist for Social Security but not Medicare? Because Social Security benefits are themselves capped — there’s a maximum monthly benefit regardless of how much a high earner contributed, so the contribution side is capped to roughly match. Medicare benefits aren’t income-scaled the same way, so there was never the same rationale for capping the Medicare tax — and Congress removed Medicare’s wage base entirely back in 1994.

One practical consequence worth knowing if you work more than one job in the same year: each employer withholds Social Security tax independently, without knowing what your other employer already withheld. If your combined wages across two jobs exceed $184,500, you may have too much Social Security tax withheld in total — but that excess is refundable as a credit when you file your federal tax return, not lost.

Worked Example: FICA on a Real Paycheck

Numbers make this concrete faster than any explanation. Take an employee earning $75,000 a year, paid biweekly (26 pay periods), with no other jobs and income well under the Additional Medicare Tax threshold.

Gross pay per paycheck: $75,000 ÷ 26 = $2,884.62

Over the full year, this employee pays $220.68 × 26 = $5,737.68 in total FICA tax, and the employer separately contributes a matching $5,737.68 — none of which shows up as a deduction from the employee’s pay. Since $75,000 stays well under the $184,500 wage base, this employee pays the full 7.65% rate on every single paycheck all year, with no point where Social Security withholding stops.

Now compare a higher earner making $200,000 a year, also paid biweekly. Social Security withholding continues at 6.2% until year-to-date wages hit $184,500 — which happens partway through the year — and then stops for the rest of the year, while the 1.45% Medicare withholding continues on every dollar with no cap. This employee’s final paycheck of the year looks noticeably different from an earlier one: smaller total withholding, because the Social Security piece has dropped out entirely, leaving only Medicare (plus, potentially, the Additional Medicare Tax below).

The Additional Medicare Tax: The 0.9% Most People Miss

Since 2013, there’s been a second, separate Medicare tax that applies only above certain income thresholds — and unlike the base 7.65%/7.65% split, this one isn’t matched by the employer at all.

The Additional Medicare Tax rate is 0.9%, owed entirely by the employee on wages above the threshold — employers are required to withhold it once an individual employee’s wages from that employer cross $200,000, regardless of the employee’s actual filing status or household income (which the employer typically has no way to know). That means a single filer earning $220,000 from one employer pays 1.45% Medicare tax on the first $200,000, and 1.45% + 0.9% = 2.35% on the remaining $20,000, with no employer match on that extra 0.9% at any point.

This also creates a genuinely common mismatch worth knowing about: a married couple filing jointly, each earning $160,000 from separate employers, has combined household income of $320,000 — well above the $250,000 joint threshold — but neither employer individually withholds the Additional Medicare Tax, since neither employee crossed $200,000 with that specific employer. The couple ends up owing the 0.9% tax on $70,000 of combined income when they file their joint return, even though no withholding captured it during the year. This is exactly the kind of gap a CPA or a quick W-4 adjustment can help avoid at tax time.

FICA for the Self-Employed: Why You Pay Both Halves

If you’re self-employed — a freelancer, an independent contractor, a sole proprietor, or a partner in a business — there’s no employer to split FICA with, so the IRS collects it differently, under a related law called the Self-Employment Contributions Act (SECA) rather than FICA directly. Functionally, though, it lands on you the same way: the self-employment tax rate is 15.3% — the full combined employee-plus-employer rate — applied to net self-employment earnings, using the same $184,500 Social Security wage base and uncapped Medicare portion described above.

There is one meaningful offset: you can deduct half of your self-employment tax as an adjustment to income on your federal return, roughly approximating the fact that an employer’s half of FICA is a pre-tax business expense for them, not taxable income to the employee. It doesn’t cut the self-employment tax bill itself, but it does reduce the income the rest of your tax return is calculated on.

NerdWallet’s breakdown of FICA withholding is a useful practical companion here if you want to run your own numbers before filing. For anyone earning income through freelance work, contract work, or gig economy platforms, this is often the single biggest tax surprise of going independent: a $75,000 salaried employee and a $75,000 self-employed freelancer both ultimately have roughly the same 15.3% in combined FICA/SECA tax generated by their income — the difference is that the freelancer pays the entire amount directly and visibly, rather than half of it being quietly absorbed by an employer. Our guide to self-employment covers the broader tax picture for independent workers, and what a sole proprietorship is covers the default business structure most self-employed people start out in before considering anything more formal.

Who’s Exempt From FICA Tax?

FICA applies broadly, but a handful of specific, narrow exceptions exist:

• Certain student employees working for the school, college, or university they’re enrolled at and regularly attending classes, under a specific IRS student exception.
• Some state and local government employees who participate in an alternative public retirement system instead of Social Security — this varies significantly by state and job.
• Certain nonresident aliens in the U.S. under specific visa categories (such as certain F-1, J-1, M-1, or Q-1 visa holders performing services allowed under their visa status), for a limited period.
• Children under 18 employed by a parent in the parent’s unincorporated business (sole proprietorship or partnership where both partners are the child’s parents) are exempt from FICA on those wages, though this exception doesn’t extend to a corporation or an LLC taxed as one.
• Certain members of qualifying religious groups with a recognized religious objection to insurance, who have filed for and received a specific IRS exemption.

These exceptions are genuinely narrow, and misapplying one is a common, expensive payroll mistake — if there’s any doubt about whether a specific worker qualifies, that’s worth confirming directly rather than assuming.

FICA Tax vs. Payroll Tax: What’s the Difference?

This is one of the most common points of confusion, largely because the two terms get used interchangeably in casual conversation even though they’re not actually the same thing:

In short: every FICA tax is a payroll tax, but not every payroll tax is FICA. FICA is one specific, well-defined component sitting inside the much broader umbrella of “payroll tax,” which also includes federal and state unemployment insurance and income tax withholding. We cover that full picture — every layer, not just this one — in our complete guide to what payroll tax is.

How FICA Connects to Your Business Structure

FICA isn’t just a paycheck line item — it’s often a central factor in one of the more consequential tax decisions a growing business makes. A few places this shows up directly:

• S corporation “reasonable salary.” An LLC or corporation that elects S corp taxation must pay any owner who actively works in the business a “reasonable salary” — run through normal payroll, with FICA withheld and matched like any other employee’s wages. Profit distributed beyond that salary can avoid the self-employment tax equivalent entirely, which is exactly why this election is such a significant tax-planning tool for profitable small businesses. Our guide to what an S corporation is walks through a full worked numeric example of the resulting savings.
• Sole proprietors and default-taxed LLCs pay the self-employment tax equivalent of FICA (the 15.3% SECA rate above) on all net business profit, with no salary/distribution split available — a structural difference our guide to what an LLC is covers in more depth.
• Worker classification — whether someone is an employee (FICA applies) or an independent contractor (it doesn’t, and a 1099 form is used instead of payroll) — is one of the IRS’s most closely scrutinized small-business compliance areas, precisely because misclassifying an employee as a contractor is an easy way to accidentally (or deliberately) avoid FICA obligations the business actually owes.

Common FICA Mistakes

• Misclassifying employees as independent contractors to avoid the employer FICA match — this is a well-known audit trigger, and back taxes, penalties, and interest on misclassified workers can add up to far more than the FICA that was avoided in the first place.
• Forgetting the Additional Medicare Tax entirely, especially for a business owner whose own income crosses $200,000 partway through a growth year.
• Not budgeting for the employer match as a real cost of hiring — a $60,000 salary actually costs an employer roughly $64,590 once the 7.65% FICA match is added, before any other benefits or payroll taxes are factored in.
• Applying a FICA exemption incorrectly — particularly the family-employment exception, which only applies to specific business structures and specific family relationships, not to every family-run business.
• Assuming a raise that crosses the Social Security wage base will always reduce take-home pay — in reality, once wages cross $184,500, take-home pay from FICA withholding typically increases for the rest of the year, since the 6.2% Social Security piece stops being withheld (only the uncapped 1.45%, plus 0.9% if applicable, continues).

Frequently Asked Questions

What does FICA stand for? FICA stands for the Federal Insurance Contributions Act, the 1935 law that created the payroll tax funding Social Security and, later, Medicare.

What is the FICA tax rate for 2026? 7.65% for employees (6.2% Social Security + 1.45% Medicare), matched by another 7.65% from the employer, for a combined 15.3%. Self-employed individuals pay the full 15.3% directly.

What is the Social Security wage base for 2026? $184,500, up from $176,100 in 2025. No further Social Security tax is withheld on wages above this amount for the rest of the year; Medicare tax has no such cap.

Is FICA the same as federal income tax? No. FICA funds Social Security and Medicare specifically. Federal income tax withholding is calculated separately, based on your W-4 elections, and funds the government’s general operations.

Do self-employed people pay FICA tax? Not technically FICA — self-employed individuals pay an equivalent tax called self-employment tax (SECA) at the same combined 15.3% rate, since there’s no employer to split it with.

What is the Additional Medicare Tax? An extra 0.9% Medicare tax on wages above $200,000 (single/head of household) or $250,000 (married filing jointly), paid entirely by the employee with no employer match.

Can I be exempt from FICA tax? Only in specific, narrow situations — certain student workers, some government employees in alternative retirement systems, some nonresident aliens, children under 18 employed by a parent’s unincorporated business, and members of certain qualifying religious groups.

Why did my paycheck’s FICA withholding drop late in the year? You likely crossed the Social Security wage base ($184,500 for 2026). Once your year-to-date wages pass that amount, the 6.2% Social Security portion stops being withheld for the rest of the year, leaving only the uncapped 1.45% Medicare portion.

Does my employer really match my FICA contribution? Yes, dollar for dollar on the base 7.65% (Social Security + regular Medicare) — though not on the Additional Medicare Tax, which has no employer match at all.

Final Thoughts

FICA feels confusing mainly because it’s presented as one thing on a pay stub when it’s actually two taxes, funding two separate trust funds, with two different rules about caps — and because half of what it actually costs an employer never appears on an employee’s pay stub at all. Once you separate those pieces out, the math is straightforward: 7.65% from your pay, 7.65% matched invisibly by your employer, until wages cross $184,500 for the Social Security half, with Medicare continuing uncapped (and, for high earners, an extra 0.9% on top).

Where this stops being trivia and starts mattering financially is exactly the areas covered above — whether you’re self-employed and paying both halves yourself, whether an S corp election could change how much of your income is exposed to it, or whether your business is budgeting realistically for what an employee actually costs once the employer match is counted. FICA is one piece of the much larger payroll tax picture — worth understanding on its own, but easiest to plan around once you can see exactly where it sits inside that bigger system.