FICA Tax Explained: Where 7.65% of Your Pay Goes

Look at any US payslip and two deductions sit below federal income tax with unhelpful labels: something like FICA-SS and FICA-MED, or OASDI and Medicare. Together they usually take more from a middle-income paycheck than income tax does, and unlike income tax they start at the first dollar, take no account of your deductions, and cannot be reduced by a W-4.

They are not general revenue. Social Security tax buys you credits toward a retirement, disability and survivor benefit calculated from your own earnings record. Medicare tax funds hospital insurance from age 65. That link between what you pay and what you are owed explains the structure of the tax, including its strangest feature: a ceiling on one half and none on the other.

Understanding where the ceiling sits is worth real money in December, in a year with a bonus, and in any decision about whether to take work as an employee or a contractor.

What is FICA tax and who pays it?

FICA is the Federal Insurance Contributions Act, and it funds Social Security and Medicare. Employees pay 6.2% for Social Security and 1.45% for Medicare, a total of 7.65% of wages. The employer pays the same amount again, so 15.3% of your wages reaches the two trust funds.

There is no standard deduction and no bracket structure. FICA applies to gross wages from the first dollar. Pre-tax health insurance premiums and health savings account contributions do reduce FICA wages; 401(k) deferrals do not.

How much FICA comes out of an $80,000 salary?

An employee earning $80,000 pays $6,120 in FICA across the year: $4,960 of Social Security and $1,160 of Medicare. The employer pays another $6,120, so the total cost of the tax on that job is $12,240.

For this worker, FICA is a bigger bill than federal income tax on the same wages after the standard deduction. That is the usual position for anyone earning under roughly six figures, and it is the part of the tax system people most often leave out of their planning. The paycheck calculator shows both layers side by side.

Why does Social Security tax stop at $184,500?

Because the benefit it buys also stops. Social Security replaces a share of your career earnings up to a maximum, so contributions are collected only up to the same maximum. The $184,500 wage base for 2026 is the line where both the tax and the benefit credit end. Medicare has no benefit ceiling, so it has no wage ceiling either.

The maximum Social Security tax an employee can pay in 2026 is $184,500 multiplied by 6.2%, which is $11,439.00. Once your year-to-date wages pass the base, that 6.2% line disappears from your payslip and your take-home rises for the rest of the year. It resets in January.

What is the additional Medicare tax?

An extra 0.9% applies to wages above $200,000 for single filers and $250,000 for married couples filing jointly. The employee pays it alone; there is no employer match on this piece. Employers must start withholding it once an individual's wages with them exceed $200,000, regardless of the employee's actual filing status.

That mechanical rule causes two predictable problems. A married couple each earning $150,000 has $300,000 of joint wages and owes the tax on $50,000, but neither employer withholds any of it, so the couple owes at filing. Conversely a single filer earning $220,000 has the tax withheld correctly. A couple filing jointly where one spouse earns $240,000 has 0.9% withheld on $40,000 but owes nothing, and gets it back.

Why is FICA regressive at high incomes?

Because the larger of the two taxes has a ceiling. Every dollar under $184,500 carries 6.2%; every dollar above carries none. The effective FICA rate therefore peaks at 7.65% and falls from there, even after the additional Medicare tax is added back.

The $250,000 row is calculated as single. Social Security stops at the base, Medicare runs on the full amount at 1.45%, and the additional 0.9% applies to the $50,000 above $200,000.

Why do self-employed people multiply by 92.35%?

To put them on the same footing as employees. An employee's FICA is charged on wages that the employer has already paid out of a pool reduced by the employer's own 7.65% share. The self-employed person has no employer, so the law first strips out an equivalent 7.65% of net earnings before applying the combined 15.3% rate. The remaining 92.35% is what gets taxed.

The deductible half is an above-the-line deduction against income tax, not against the self-employment tax itself. It reduces adjusted gross income, so its value depends on your income tax band: at 22% the $7,064.78 deduction is worth $1,554.25. Run your own profit through the self-employment tax calculator to see both figures.

The same caps apply. Above the wage base the 12.4% Social Security portion stops, and above $200,000 the additional Medicare tax starts. On $250,000 of net profit, net earnings are $230,875, Social Security is capped at $184,500 times 12.4%, or $22,878.00, Medicare is $6,695.38, and the additional Medicare tax on the $30,875 above $200,000 is $277.88, for a total of $29,851.26.

Can I reduce FICA?

Very little of it, legitimately. FICA applies to gross wages regardless of your income tax deductions. Contributing $24,500 to a traditional 401(k) reduces income tax but not FICA. Only a short list of pre-tax benefits reduce FICA wages, chiefly employer-sponsored health premiums, health savings account contributions made through payroll, and dependent care accounts.

The exception people reach for is the S corporation. An owner who takes part of business profit as a reasonable salary and part as a distribution pays FICA only on the salary. The word doing the work is reasonable: the IRS challenges understated salaries, and the administrative cost of running payroll eats into the saving on modest profits.

Common mistakes

Assuming a big December paycheck means an error. If your wages passed $184,500 during the year, the 6.2% line stops and your net pay jumps. Nothing is wrong. It resets in January and the deduction reappears.

Thinking a 401(k) deferral saves payroll tax. It does not. Deferring $10,000 into a traditional 401(k) saves income tax at your marginal rate but the full $765 of FICA is still collected on that money. This surprises people who model retirement contributions as saving their full combined rate.

Two jobs and an over-collected Social Security tax. Each employer applies the wage base independently. Someone earning $120,000 at two jobs has $240,000 of wages and will have Social Security withheld on all of it, well past the $184,500 base. The excess is recovered as a credit on the federal return, but only if you claim it. Check your W-2 boxes and add them up.

Married couples ignoring the additional Medicare tax. The $250,000 joint threshold is not enforced by either employer's payroll system. Two spouses each earning $150,000 will owe 0.9% on $50,000, which is $450, with nothing withheld. Add it to your estimated payments or expect it at filing.

Freelancers budgeting only for income tax. Self-employment tax on $100,000 of profit is $14,129.55 before a cent of income tax. Quarterly estimates that cover only income tax will be short by roughly that amount.

Where FICA does not apply

Not all income is subject to it. Interest, dividends, capital gains, rental income and most retirement distributions carry no FICA. That is why a retiree living on investment income can have a substantial income and a zero payroll tax bill, and why the states with no income tax comparison looks different for retirees than for wage earners.

Certain employment is also outside the system: some state and local government workers covered by their own pension arrangements, certain student employees of the school they attend, and some religious exemptions. Being outside the system means no tax now and no benefit credit later, which is a trade rather than a saving.

Before you check your payslip

• Add box 3 and box 5 across all W-2s to confirm no employer over-collected Social Security.
• Compare year-to-date Social Security withheld against $11,439.00, the annual maximum.
• If your household wages exceed $250,000 jointly, budget 0.9% on the excess.
• For the self-employed, apply the 92.35% step before the 15.3% rate.
• Claim the deductible half of self-employment tax as an adjustment, not an itemized deduction.
• Confirm your pre-tax health premiums are reducing FICA wages, not just income tax wages.
• If you hold two jobs, check whether excess Social Security tax is recoverable this year.

What to watch next

The Social Security wage base is reset annually and moves with the national average wage index, so it rises most years. The 6.2%, 1.45% and 0.9% rates are set in statute and change only by legislation, which is rare. The $200,000 and $250,000 additional Medicare thresholds are not indexed for inflation, so each year more households cross them without any change in real income. That drift is the quiet story in payroll tax, and it is worth rechecking your position against those two numbers annually.