FICA Tax Explained: Social Security and Medicare in 2026
FICA takes 7.65% from every US paycheck — 6.2% Social Security up to $184,500 wage base, 1.45% Medicare on all wages, plus 0.9% Additional Medicare above $200k. Full breakdown.
The line on your paystub labeled “FICA” or “Social Security & Medicare” takes 7.65% from every dollar you earn — more than most state income taxes, and twice that amount when you count the matching contribution from your employer. Despite being the largest single deduction for most American workers, FICA is rarely explained clearly. This guide breaks down exactly how Social Security tax (OASDI) and Medicare tax work in 2026, who pays what, and how the Additional Medicare Tax kicks in for higher earners.
Key Takeaways
- FICA = Social Security (6.2%) + Medicare (1.45%) = 7.65% taken from each paycheck
- Your employer pays a matching 7.65% — self-employed workers pay both halves (15.3%)
- 2026 Social Security wage base: $184,500 (up from $176,100 in 2025)
- Medicare has no wage cap — it applies to every dollar you earn
- Additional Medicare Tax of 0.9% applies on wages above $200,000 (single) or $250,000 (MFJ)
What FICA actually funds
FICA stands for the Federal Insurance Contributions Act, passed in 1935 to fund Social Security and amended in 1965 to add Medicare. Unlike federal income tax, FICA contributions are tied directly to specific federal benefit programs:
- Social Security (OASDI) — Old Age, Survivors, and Disability Insurance. Funds retirement benefits, survivor benefits for dependents of deceased workers, and disability income.
- Medicare (HI) — Hospital Insurance. Funds Medicare Part A (hospital coverage) for beneficiaries 65+ and certain disabled individuals.
Your earnings history of FICA contributions determines your future Social Security benefit (capped at the highest 35 years of earnings) and your eligibility for premium-free Medicare Part A at age 65 (requires 40 quarters / 10 years of contributions).
The 7.65% FICA breakdown for 2026
Every paycheck has two FICA lines, regardless of your state or filing status:
| Component | Rate | 2026 wage cap |
|---|---|---|
| Social Security (OASDI) | 6.2% | $184,500 |
| Medicare (HI) | 1.45% | No cap |
| Total FICA | 7.65% | — |
Source: Social Security Administration — 2026 wage base announcement and IRS Publication 15 — Employer’s Tax Guide.
Social Security: capped at $184,500
For 2026, you pay 6.2% Social Security tax on every dollar of wages up to the $184,500 wage base limit. Any earnings above $184,500 in 2026 are exempt from Social Security tax — but not from Medicare or income tax.
A single filer earning $200,000 in 2026 pays:
- $184,500 × 6.2% = $11,439 in Social Security
- Earnings from $184,501 to $200,000 = $0 Social Security
The wage base is indexed to the national average wage and increases most years. From $176,100 in 2025 to $184,500 in 2026 = a 4.8% increase, reflecting wage inflation.
Medicare: 1.45% on every dollar, no cap
Unlike Social Security, Medicare tax has no wage ceiling. Whether you earn $40,000 or $4 million, every dollar pays 1.45% Medicare. That’s why high earners often see Medicare tax rivaling or exceeding their Social Security tax in absolute dollars.
A worker earning $500,000 in 2026 pays:
- Social Security: $184,500 × 6.2% = $11,439 (then $0 above the cap)
- Medicare: $500,000 × 1.45% = $7,250
Additional Medicare Tax: 0.9% on high earners
The Additional Medicare Tax (created by the Affordable Care Act) adds 0.9% to wages above:
- $200,000 — Single filers
- $250,000 — Married filing jointly
- $125,000 — Married filing separately
Important detail: employers withhold Additional Medicare Tax on wages over $200,000 regardless of filing status, because they don’t know your spouse’s income. If you’re MFJ and your individual wages cross $200k but household income stays under $250k, you’ll get the over-withheld portion back at filing.
A single filer earning $300,000 in 2026 pays:
- Regular Medicare: $300,000 × 1.45% = $4,350
- Additional Medicare on wages above $200k: $100,000 × 0.9% = $900
- Total Medicare: $5,250
Employer match: the hidden 7.65%
For every dollar of FICA you pay, your employer pays an identical 7.65% on top of your wages. This is why total wages “cost” your employer 107.65% of your gross salary (before benefits, payroll fees, etc.). Some economists argue this match is effectively part of your compensation — your employer would otherwise pay the matching amount as higher wages — but it doesn’t appear on your paystub.
The employer match is not subject to the Additional Medicare Tax. Only the employee pays the 0.9% surcharge.
Self-employment: paying both halves (SECA)
Self-employed individuals don’t have an employer to match their FICA. Instead, they pay both halves themselves under the Self-Employment Contributions Act (SECA):
- Social Security: 12.4% on net earnings up to $184,500
- Medicare: 2.9% on all net earnings
- Additional Medicare: 0.9% on net earnings above the same thresholds
- Total SE tax: 15.3% on net earnings
The good news: self-employed workers can deduct half of their SE tax as an above-the-line adjustment on Form 1040 — partial offset for paying both halves. See our freelancer quarterly tax guide for the full mechanics.
Does state of residence change FICA?
No. FICA is purely federal. Your Social Security and Medicare deductions are identical whether you live in California, Texas, New York, or Florida. State income tax varies wildly by state — see Paymappr’s US state coverage for state-specific take-home pay — but FICA is constant nationwide.
Common FICA misconceptions
“My FICA payments fund my own retirement account.” Not exactly. Social Security operates as a pay-as-you-go system: today’s worker contributions fund today’s retiree benefits. Your earnings record determines your eventual benefit, but your money is not held in a personal account.
“I should be able to opt out of FICA.” Almost no one can opt out. Limited exemptions exist for certain religious orders, some non-resident foreign students on F/M/J/Q visas, and members of qualifying tax-exempt religious sects. Standard W-2 employees cannot opt out.
“Pre-tax 401(k) contributions reduce my FICA.” False. 401(k) contributions reduce federal and state income tax but not FICA. Your full gross salary is subject to FICA before the 401(k) deduction. The exception is HSA contributions made via cafeteria plan (Section 125), which do reduce FICA.
“Health insurance premiums are FICA-exempt.” Only when paid through a Section 125 cafeteria plan (most employer-sponsored plans qualify). Premiums you pay post-tax through individual ACA marketplace plans are not FICA-exempt.
Quick FICA reference card (2026)
| Earnings level | Social Security | Medicare | Total FICA |
|---|---|---|---|
| $40,000 | $2,480 | $580 | $3,060 |
| $80,000 | $4,960 | $1,160 | $6,120 |
| $150,000 | $9,300 | $2,175 | $11,475 |
| $184,500 (cap) | $11,439 | $2,675 | $14,114 |
| $250,000 | $11,439 | $3,625 + $450 add’l | $15,514 |
| $500,000 | $11,439 | $7,250 + $2,700 add’l | $21,389 |
Bottom line
FICA is a mandatory federal payroll tax that funds Social Security and Medicare. The mechanics are simple: 6.2% Social Security up to $184,500, 1.45% Medicare on everything, plus 0.9% Additional Medicare above $200k single / $250k MFJ. Your employer matches the first two; self-employed workers pay all 15.3% themselves.
To see how FICA combines with federal income tax and your state’s tax to produce your actual take-home pay, plug your numbers into Paymappr’s paycheck calculator — it splits out each component cleanly so you can see exactly where every dollar of your gross salary goes.