Look at your pay stub and you’ll see a line called FICA, or maybe two lines labeled Social Security and Medicare. Together they take roughly 7.65% of your gross wages. They’re not optional, you can’t deduct them on your tax return, and they fund two of the most important benefits most Americans rely on. Knowing what FICA is — and what you’re actually paying for — helps make sense of your paycheck.
Quick answer: what FICA is
FICA stands for the Federal Insurance Contributions Act. It’s the federal payroll tax that funds two specific programs: Social Security and Medicare. Every working American who earns wages pays FICA, and so does their employer (an equal matching share).
The combined FICA tax rate is 15.3% of wages. Half (7.65%) is taken out of your paycheck; the other half is paid by your employer on top of your salary. Self-employed workers pay both halves themselves.
How FICA breaks down
FICA has two components, each going to a specific program:
Social Security tax (6.2% from employee, 6.2% from employer)
Funds Social Security retirement, disability, and survivor benefits. Applies to wages up to a yearly cap called the Social Security wage base. In 2024, the wage base is $168,600 — earnings above that aren’t subject to Social Security tax. The wage base adjusts annually based on national wage growth.
Medicare tax (1.45% from employee, 1.45% from employer)
Funds Medicare hospital insurance (Part A). There’s no wage cap — every dollar of wages is taxed. High earners (above $200,000 individual / $250,000 married filing jointly) pay an additional 0.9% Medicare surtax on wages above those thresholds, but the employer match stays at 1.45%.
How much FICA you actually pay
Some quick examples (using 2024 figures):
- $30,000 salary: $1,860 Social Security + $435 Medicare = $2,295 in FICA. Employer matches another $2,295.
- $60,000 salary: $3,720 + $870 = $4,590. Employer matches $4,590.
- $100,000 salary: $6,200 + $1,450 = $7,650. Employer matches $7,650.
- $200,000 salary: $10,453 (capped at the wage base) + $2,900 + $0 surtax = $13,353. Employer matches the Social Security and Medicare portions but not the surtax.
Where FICA shows up on your pay stub
Different employers label it differently. You might see:
- FICA as a single line item showing the combined 7.65%
- OASDI (Old-Age, Survivors, and Disability Insurance) and Medicare as separate lines
- Soc Sec or SS Tax and Medicare Tax as separate lines
- SS and HI (Hospital Insurance) on some payroll systems
All of these labels refer to the same two underlying taxes. If you add the Social Security and Medicare lines together, you get total FICA.
What FICA pays for
Social Security
The 6.2% Social Security portion funds three benefit programs:
- Retirement benefits — monthly income for retired workers, available as early as age 62 (with a permanent reduction) or up to age 70 (with delayed retirement credits)
- Disability benefits — income for workers who become unable to work due to a medical condition expected to last at least a year
- Survivor benefits — income for spouses, children, and certain other dependents of deceased workers
Medicare Hospital Insurance (Part A)
The 1.45% Medicare portion funds the hospital insurance side of Medicare — inpatient hospital stays, skilled nursing, hospice, and some home health care. Most people qualify for premium-free Part A at age 65 because they paid into the system through FICA for at least 10 years (40 quarters of work).
FICA and self-employment
Self-employed people don’t have an employer to match their contribution — so they pay both halves themselves. The combined rate is 15.3% (12.4% Social Security + 2.9% Medicare), called the Self-Employment (SE) tax.
Some relief: half of the SE tax is deductible from your gross income for income tax purposes, which softens the impact slightly.
FICA vs. federal income tax
Easy to confuse, but they’re different taxes:
- FICA — flat percentage of wages, funds Social Security and Medicare specifically. Doesn’t depend on filing status or deductions.
- Federal income tax — progressive (different rates at different income levels), funds general government spending. Affected by deductions, credits, filing status.
Both come out of your paycheck. FICA is a smaller percentage but applies to more of your income (no deductions, no exemptions). Federal income tax can be reduced through tax credits, the standard deduction, retirement contributions, and other strategies; FICA largely cannot.
What FICA does NOT cover
FICA only funds Social Security and Medicare. Other things sometimes deducted from your paycheck are not FICA:
- Federal income tax (a separate, progressive tax)
- State income tax (varies by state)
- State disability insurance (a few states)
- 401(k) or retirement contributions (your money, not a tax)
- Health insurance premiums (your contribution to your benefits)
- Union dues, parking, transit benefits, etc.
Why FICA matters for retirement
Every dollar of FICA you pay builds your future Social Security benefit. Your eventual retirement benefit is based on your highest 35 years of earnings — and only earnings up to the wage base count. Years with lower earnings or no earnings reduce the calculation. This is why career gaps, part-time work, and self-employment underreporting can affect your retirement income decades later.
It’s also why checking your Social Security earnings record annually matters — mistakes in what was reported to FICA can quietly lower your future benefit if not caught and corrected within the deadline.
Common mistakes
- Thinking FICA is the same as federal income tax. They’re different taxes with different rules.
- Trying to deduct FICA on your tax return. Generally not allowed for employees (self-employed get a partial deduction).
- Forgetting that earnings above the wage base don’t build a bigger Social Security benefit. Only earnings up to the cap count for benefit calculation.
- Ignoring FICA in self-employment planning. The 15.3% SE tax is on top of income tax — a significant cost that 1099 workers need to plan for.
What to do next
Pull out your most recent pay stub and identify the FICA, Social Security, and Medicare lines. Confirm the math — 7.65% of your gross wages should roughly equal the sum of those lines. While you’re at it, log into your my Social Security account at ssa.gov and verify that the most recent year of earnings has been correctly recorded; that’s how the FICA you’re paying turns into the Social Security benefit you eventually receive.
Further Reading
- How to Read a Pay Stub
- Gross Pay vs. Net Pay
- How to Read Your W-2
- How to Check Your Social Security Earnings Record
- How Social Security Benefits Are Taxed
- Social Security for Self-Employed
- Money Basics
This article is for general educational purposes only and does not constitute financial advice. Rules and rates change — verify specifics with your bank, employer, or a qualified advisor before acting.