Social Security Tax Calculator
Plug in your income to see how much you owe in Social Security, Medicare, and Additional Medicare Tax for 2026. The calculator applies the $184,500 wage base cap and shows your full FICA breakdown.
Gross Annual Income
Total wages (W-2) or net self-employment income (1099) before taxes.
Employment Type
W-2 employees pay 6.2% SS + 1.45% Medicare. Self-employed pay both halves (12.4% + 2.9%).
Filing Status
Affects the Additional Medicare Tax (0.9%) threshold only.
W-2 wages from another job. Reduces the SS wage base available for SE income.
Employer Share
Employer does not pay the Additional Medicare Tax (0.9%).
SS Wage Base Tracker
2025 vs 2026 Change
Wage base increased from $176,100 (2025) to $184,500 (2026).
Projections
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What is Social Security tax and how does it work?
Social Security tax is a payroll tax that funds the federal Old-Age, Survivors, and Disability Insurance (OASDI) program. If you're a W-2 employee, the cost is split: you pay 6.2% and your employer pays another 6.2%, totaling 12.4%. Self-employed workers pay the full 12.4% out of pocket.
The big distinction from Medicare tax is the wage base cap. Social Security tax stops at $184,500 of income in 2026. Medicare tax (1.45% for employees, 2.9% for self-employed) has no cap at all. Social Security plus Medicare equals your FICA tax: 7.65% for employees, not counting the extra 0.9% Medicare surtax that kicks in for high earners.
How Social Security tax is calculated step by step
W-2 Employee (3 steps):
- Check your gross wages against the $184,500 wage base. Anything above that limit is not subject to SS tax.
- Multiply the taxable portion by 6.2%. That's your Social Security tax.
- Add Medicare tax (1.45% on all wages) plus the Additional Medicare Tax (0.9%) if your income exceeds the threshold for your filing status.
Self-Employed (5 steps):
- Take your net SE income and multiply by 92.35%. This is the IRS adjustment factor.
- Pay 12.4% Social Security on that adjusted amount, but only up to $184,500 minus any W-2 income you earned.
- Pay 2.9% Medicare on the full adjusted amount. There is no cap here.
- If your combined income crosses the threshold, add 0.9% Additional Medicare Tax.
- You can deduct half of your base SE tax (SS + Medicare, excluding the 0.9%) from your AGI.
W-2 vs self-employed: FICA comparison at $100,000
| Component | W-2 Employee | Self-Employed |
|---|---|---|
| Taxable Base | $100,000 | $92,350 (92.35%) |
| Social Security | $6,200 (6.2%) | $11,451 (12.4%) |
| Medicare | $1,450 (1.45%) | $2,678 (2.9%) |
| Total FICA | $7,650 | $14,129 |
| Deductible Half | N/A | $7,065 |
Social Security tax by income level (W-2, 2026)
| Gross Income | SS Tax (6.2%) | Medicare (1.45%) | Addl Medicare | Total FICA | Eff. Rate |
|---|---|---|---|---|---|
| $50,000 | $3,100 | $725 | $0 | $3,825 | 7.65% |
| $75,000 | $4,650 | $1,088 | $0 | $5,738 | 7.65% |
| $100,000 | $6,200 | $1,450 | $0 | $7,650 | 7.65% |
| $150,000 | $9,300 | $2,175 | $0 | $11,475 | 7.65% |
| $184,500 | $11,439 | $2,675 | $0 | $14,114 | 7.65% |
| $200,000 | $11,439 | $2,900 | $0 | $14,339 | 7.17% |
| $250,000 | $11,439 | $3,625 | $450 | $15,514 | 6.21% |
| $500,000 | $11,439 | $7,250 | $2,700 | $21,389 | 4.28% |
Social Security wage base history (2020–2026)
| Year | Wage Base | Max Employee SS Tax | Max SE SS Tax | YoY Increase |
|---|---|---|---|---|
| 2026 | $184,500 | $11,439 | $22,878 | +$8,400 |
| 2025 | $176,100 | $10,918 | $21,836 | +$7,500 |
| 2024 | $168,600 | $10,453 | $20,906 | +$8,400 |
| 2023 | $160,200 | $9,932 | $19,865 | +$13,200 |
| 2022 | $147,000 | $9,114 | $18,228 | +$4,200 |
| 2021 | $142,800 | $8,854 | $17,707 | +$5,100 |
| 2020 | $137,700 | $8,537 | $17,075 | +$4,800 |
The SSA adjusts the wage base each year based on the national average wage index. For 2026, the $8,400 bump means anyone earning between $176,100 and $184,500 will owe up to $520.80 more in Social Security tax than they did in 2025.
Frequently asked questions
Common questions about Social Security tax and FICA
What is Social Security tax and how much is it in 2026?
It's a payroll tax that funds retirement, disability, and survivor benefits under the federal OASDI program. In 2026, employees pay 6.2% and employers match that for 12.4% total, on wages up to $184,500. If you're self-employed, you owe the full 12.4% on 92.35% of your net earnings.
What is the Social Security wage base for 2026?
It's $184,500 in 2026, up $8,400 from $176,100 in 2025. You only pay the 6.2% SS tax (12.4% if self-employed) on income up to that limit. At the cap, the maximum employee SS tax comes to $11,439.
How is Social Security tax different from Medicare tax?
Social Security tax (6.2%) cuts off at the $184,500 wage base, while Medicare tax (1.45%) has no cap and hits all earned income. Combined, they make up FICA tax at 7.65% for employees. If you earn above $200,000 (single) or $250,000 (married filing jointly), you also owe a 0.9% Medicare surtax.
What is the Additional Medicare Tax and who pays it?
It's a 0.9% surtax on earned income above certain thresholds: $200,000 for single/HoH filers, $250,000 for married filing jointly, or $125,000 for married filing separately. Your employer starts withholding it at $200,000 no matter how you file. Unlike regular Medicare tax, there is no employer match.
How does Social Security tax work for self-employed individuals?
When you're self-employed, you cover both sides: 12.4% for Social Security and 2.9% for Medicare, which adds up to 15.3%. Before calculating that, the IRS lets you reduce your net SE earnings by 7.65% (the 92.35% factor). You can also deduct half of your SE tax from AGI.
What happens when I earn more than the Social Security wage base?
You stop paying Social Security tax on anything above $184,500. Medicare tax (1.45%) keeps going with no limit. If you also pass $200,000 (single), the 0.9% Additional Medicare surtax kicks in. Because SS tax is capped, your effective FICA rate actually goes down as income climbs past the wage base.
Can I get a refund if too much Social Security tax was withheld?
Yes, but usually only if you had multiple jobs. Each employer withholds SS tax separately, so if your combined W-2 wages crossed $184,500, you likely overpaid. Claim the excess as a credit on your Form 1040. With a single employer, they stop withholding once you hit the cap.
How did the Social Security wage base change from 2025 to 2026?
It went from $176,100 in 2025 to $184,500 in 2026, an $8,400 jump. If you earn between $176,100 and $184,500, you'll owe up to $520.80 more in SS tax this year. The maximum employee SS tax went from $10,918.20 to $11,439.00.
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