FICA Tax Calculator

Say you're single and earn $85,000 in wages for the 2025 tax year. Your FICA tax is 6.2% Social Security ($85,000 × 6.2% = $5,270) plus 1.45% Medicare ($85,000 × 1.45% = $1,232.50), for a total employee FICA of $6,502.50 - an effective FICA rate of 7.65%. Your employer pays a matching $6,502.50, so the government collects $13,005 on your wages. This FICA tax calculator breaks all of that out, including the 0.9% Additional Medicare tax for high earners. All figures are for tax year 2025.

The 2025 FICA rates and limits

FICA has two flat-rate pieces, plus a surtax for high earners:

The employee total on most wages is 7.65%, your employer matches it, and the combined contribution is 15.3%. The maximum 2025 Social Security tax is $176,100 × 6.2% = $10,918.20 per worker.

The Social Security wage base cap

Social Security tax only applies to the first $176,100 of wages in 2025 - earnings above that are not taxed for Social Security. Medicare, by contrast, has no cap, so the 1.45% keeps applying no matter how much you earn. If you change jobs mid-year and overpay Social Security across two employers, you can claim the excess back when you file.

The 0.9% Additional Medicare tax

High earners owe an extra 0.9% Medicare tax on wages above $200,000 (single, head of household), $250,000 (married filing jointly) or $125,000 (married filing separately). Only the employee pays this - employers do not match it. Your employer withholds it once your wages with them top $200,000, but the actual liability is reconciled on your tax return based on your filing status.

FICA for the self-employed

If you're self-employed, you pay both halves as self-employment tax: 12.4% Social Security (up to $176,100) and 2.9% Medicare on net earnings, applied after multiplying net earnings by 0.9235. The same 0.9% Additional Medicare applies over the thresholds. The upside: you can deduct one-half of your self-employment tax on your income tax return. For a dedicated breakdown of the 12.4% + 2.9% structure and the 0.9235 factor, use our Self-Employment Tax Calculator.

How to use this FICA calculator

You only need two or three inputs to get an accurate result. Work through the fields in order:

1. Gross wages: enter your annual (or per-paycheck) gross pay before any deductions. FICA is figured on gross wages, not on take-home pay.
2. Filing status: choose single, head of household, married filing jointly, or married filing separately. This only changes the threshold for the 0.9% Additional Medicare tax - the base 6.2% and 1.45% are the same for everyone.
3. Read the breakdown: the calculator splits out your Social Security tax, regular Medicare tax, any Additional Medicare tax, your total employee FICA, and the matching amount your employer pays.

Because the rates are flat, the result updates the instant you change a number. If your wages are below $176,100 and under the Additional Medicare threshold, your total will simply be 7.65% of your gross pay.

A second worked example: a high earner over both thresholds

Suppose you're single and earn $250,000 in wages for 2025. Social Security is capped at the $176,100 wage base, so you pay the maximum $10,918.20 (not 6.2% of the full $250,000). Regular Medicare is 1.45% on all $250,000 = $3,625. Because your wages top the $200,000 single threshold, you also owe the 0.9% Additional Medicare tax on the $50,000 above it = $450. Your total employee FICA is $14,993.20. Your employer matches the Social Security and regular Medicare ($10,918.20 + $3,625 = $14,543.20) but does not match the $450 surtax. This is why high earners can't simply multiply their salary by 7.65%.

Who this calculator is for

FICA touches almost every paycheck in the United States, so this tool helps a wide range of people:

• Employees who want to understand the "Social Security" and "Medicare" lines on their pay stub.
• New hires translating a job offer's salary into actual take-home pay.
• High earners checking whether the 0.9% Additional Medicare tax applies to them.
• Small-business owners and payroll staff estimating the employer match they owe per worker.
• Freelancers and the self-employed sizing up their self-employment tax before quarterly estimated payments.
• Anyone budgeting who needs the full picture of payroll taxes alongside federal income tax.

Key FICA terms explained

• FICA: the Federal Insurance Contributions Act, the law that authorizes the Social Security and Medicare payroll taxes.
• Wage base: the maximum amount of annual wages subject to Social Security tax - $176,100 for 2025. Wages above it are exempt from the 6.2%.
• OASDI: "Old-Age, Survivors, and Disability Insurance," the formal name for the Social Security portion. It may appear on your pay stub as OASDI rather than "Social Security."
• HI: "Hospital Insurance," the formal name for the Medicare portion (the 1.45%).
• Additional Medicare tax: the 0.9% surtax on high wages, paid only by the employee, with thresholds that depend on filing status.
• Employer match: the equal 6.2% + 1.45% your employer contributes on your behalf; combined with your share it totals 15.3%.

What FICA actually pays for

FICA is not a general tax - it funds two specific programs. The 6.2% Social Security portion goes into the trust funds that pay retirement, survivor, and disability benefits, and your lifetime earnings record determines the benefit you'll eventually receive. The 1.45% Medicare portion (plus the 0.9% surtax) funds Medicare Part A, which covers hospital care for people 65 and older and certain younger people with disabilities. Unlike federal income tax, the money you pay into Social Security is tied directly to the benefits you can claim later, which is why your annual Social Security statement shows your recorded earnings.

Pre-tax deductions that lower FICA wages

Not every payroll deduction reduces the wages FICA is calculated on. Knowing the difference helps you understand why your FICA might be lower than 7.65% of your stated salary:

• Reduce FICA wages: contributions to a health savings account (HSA) through payroll, premiums paid through a Section 125 "cafeteria" plan (health, dental, vision), and flexible spending account (FSA) contributions generally come out before FICA is applied.
• Do not reduce FICA wages: traditional 401(k) and 403(b) contributions lower your federal income tax but are still subject to Social Security and Medicare tax. Roth contributions don't reduce either.

This calculator works from the gross wages you enter, so if you want a FICA figure that reflects pre-tax health or HSA deductions, subtract those amounts from your gross pay first.

How FICA compares to federal income tax

People often lump all paycheck withholding together, but FICA and federal income tax behave very differently:

• Rate structure: FICA is flat (6.2% + 1.45%); income tax is progressive with brackets.
• Deductions: the standard deduction and itemized deductions cut income tax but never reduce FICA.
• Caps: Social Security stops at the wage base; income tax has no income ceiling.
• Refunds: over-withheld income tax comes back as a refund; FICA generally doesn't, except excess Social Security from holding two jobs.
• Purpose: FICA is earmarked for Social Security and Medicare; income tax funds the general federal budget.

To estimate the income-tax side of your paycheck, pair this tool with our Income Tax Calculator or Paycheck Calculator. If you want a single number for your whole check, the paycheck tool layers FICA, federal income tax, and your pre-tax deductions together.

Limitations and assumptions

This calculator is a planning estimate, not tax advice. Keep these assumptions in mind:

• It uses the 2025 rates and the $176,100 Social Security wage base; these figures change most years.
• It calculates FICA on the gross wages you enter and does not automatically subtract pre-tax HSA, FSA, or cafeteria-plan deductions.
• It does not include federal income tax, state or local taxes, or other withholdings on your check.
• The Additional Medicare tax is withheld by employers strictly above $200,000; your true liability is reconciled on your return using the threshold for your filing status, so withholding and final tax can differ.
• Self-employment tax is structured differently (the 0.9235 net-earnings factor and the one-half deduction) and isn't the focus of this employee-side calculator.

FICA on a per-paycheck basis

FICA is calculated and withheld every pay period, not just once a year. To find the FICA on a single check, apply the same rates to that period's gross wages: 6.2% for Social Security and 1.45% for Medicare, or 7.65% combined. On a $3,000 biweekly paycheck, for example, that is $186 of Social Security plus $43.50 of Medicare = $229.50 of employee FICA per check. Because Social Security stops at the $176,100 wage base, high earners who hit the cap partway through the year will see their Social Security withholding drop to zero on later paychecks while Medicare keeps coming out - which is why a December check can be noticeably bigger than a January one. The 0.9% Additional Medicare tax also kicks in mid-year: your employer starts withholding it on the paycheck that pushes your year-to-date wages past $200,000, regardless of your filing status. To see the full per-check picture including federal income tax and pre-tax deductions, run the numbers through our Paycheck Calculator.

FICA and your future Social Security benefit

Unlike income tax, the Social Security half of FICA is more like a contribution toward a benefit you can claim later. The Social Security Administration tracks your taxed earnings each year and uses your highest 35 years of indexed wages to compute your retirement benefit. Years where you earned at or above the wage base count the most, and years with little or no covered earnings count as zeros that drag the average down. That is the practical reason the 6.2% feels less like a pure tax than the Medicare or income-tax pieces - it builds an earnings record. If you are curious how today's wages translate into a future monthly check, our Social Security Calculator estimates the benefit side, while this page handles the tax side. The Medicare 1.45% works differently: it funds Part A hospital coverage broadly rather than crediting an individual account, and you generally qualify for premium-free Part A at 65 after about 40 quarters (ten years) of Medicare-taxed work.

Who can be exempt from FICA

Almost all U.S. employees pay FICA, but a few narrow groups are exempt under specific IRS rules. Students who work for the same school where they are enrolled at least half-time generally do not pay FICA on that on-campus job (the student FICA exemption). Some state and local government employees hired before certain dates are covered by a separate public pension instead of Social Security. Certain nonresident aliens on F-1, J-1, M-1, and Q-1 visas are exempt on wages tied to their visa purpose, and members of recognized religious groups that object to insurance benefits can apply for an exemption. These are exceptions, not loopholes - if none applies to you, FICA comes out of every dollar of covered wages. Being exempt also usually means those wages do not build a Social Security earnings record, which can lower your future benefit.

How FICA fits with the rest of your paycheck

FICA is only one of several withholdings, and lining them up helps the whole pay stub make sense. A typical paycheck subtracts, in rough order: pre-tax deductions (HSA, FSA, cafeteria-plan health premiums), then FICA on the reduced wage base, then federal income tax based on your W-4, then any state and local income tax, and finally after-tax deductions such as Roth 401(k) or garnishments. Notice that FICA sits near the top and is largely unavoidable - the standard deduction and tax brackets that shrink your income tax do nothing to it. A few sister tools cover the other layers: the Income Tax Calculator handles the progressive federal brackets, the Effective Tax Rate Calculator blends income tax and FICA into one effective percentage, the Tax Bracket Calculator shows your marginal rate, and the Salary Calculator converts between hourly, weekly, and annual pay before any tax.

Quick FICA tips and reminders

• Under both limits? It's just 7.65%. If your wages are below $176,100 and under the Additional Medicare threshold, you can skip the breakdown - multiply gross pay by 0.0765 for your total employee FICA.
• Two jobs? Watch the Social Security cap. Each employer withholds Social Security up to $176,100 on its own. If your combined wages exceed the base, you over-pay during the year and recover the excess as a credit when you file.
• A raise past $200,000 triggers extra withholding. The 0.9% Additional Medicare tax starts the paycheck your year-to-date wages cross $200,000 with one employer, even if your filing-status threshold is higher.
• Bonuses are FICA wages too. Supplemental pay like bonuses and commissions is subject to the same 6.2% + 1.45%, which is why a bonus check shrinks more than people expect.
• Pre-tax health and HSA lower FICA; 401(k) does not. Subtract qualifying cafeteria-plan and HSA amounts from gross pay before applying 7.65% if you want a precise figure.
• FICA is annual, not lifetime, for the cap. The Social Security wage base resets every January 1, so the cap you reached last year does not carry over.