What is FICA on Your Paycheck?
FICA stands for the Federal Insurance Contributions Act, a US law enacted in 1935 that mandates payroll deductions to fund two critical federal entitlement programs: Social Security (OASDI) and Medicare (Hospital Insurance).
Withheld on earnings up to the 2026 cap of $174,900. Maximum employee contribution: $10,843.80.
Withheld on 100% of all earned wages with no upper limit, plus 0.9% on wages above $200k.
The Employer Match: Why FICA is Actually 15.3%
As a W-2 employee, you only see 7.65% deducted from your gross pay. However, your employer is legally required to pay an equal 7.65% match out of company funds. Together, the combined contribution into the trust funds is 15.30% of gross wages:
| Program | Employee Share | Employer Match | Total Trust Fund Deposit |
|---|---|---|---|
| Social Security (OASDI) | 6.20% | 6.20% | 12.40% |
| Medicare (Hospital Insurance) | 1.45% | 1.45% | 2.90% |
| Combined Total Baseline | 7.65% | 7.65% | 15.30% |
*Self-employed independent contractors (1099 workers) pay both halves themselves through the Self-Employment Tax (SECA), although they can deduct the 50% employer equivalent on Form 1040 Schedule 1.
The $174,900 Social Security Cap: End-of-Year Pay Raises
The Social Security taxable wage base limit is adjusted annually for national average wage indexing. For the 2026 calendar year, the cap is $174,900.
What happens when your cumulative salary passes $174,900?
Once your cumulative year-to-date earnings hit $174,900, your employer stops withholding the 6.2% Social Security tax for the remainder of the calendar year. High earners will notice a sudden 6.2% bump in their net take-home pay during the fall or winter months until January 1st resets the counter.
Crucial Tax Nuance: What Reduces FICA and What Doesn't?
Many workers are surprised to learn that not all "pre-tax" deductions work the same way under Internal Revenue Code statutes:
Retirement contributions DO NOT reduce FICA taxes. If you earn $80,000 and contribute $10,000 to a 401(k), you still pay the full 7.65% FICA tax on the entire $80,000 gross. You only save on Federal and State income taxes.
Health insurance premiums, HSA (Health Savings Account), and FSA (Flexible Spending Account) payroll deductions DO reduce FICA taxes. Contributing $4,000 to an HSA saves you an extra 7.65% ($306) in FICA taxes on top of federal and state savings!
The 0.9% Additional Medicare Tax
Created under the Affordable Care Act, an Additional Medicare Tax of 0.9% applies to wages exceeding statutory thresholds:
- Single / Head of Household: Applies to earnings over $200,000 (total Medicare rate: 2.35%).
- Married Filing Jointly: Applies to combined earnings over $250,000.
- Married Filing Separately: Applies to earnings over $125,000.
Note: Employers are required to begin withholding the 0.9% surtax once an employee's individual wages exceed $200,000 in a calendar year, regardless of marital status.
Calculate Your Exact 2026 FICA Deductions
See how your Social Security and Medicare withholdings are calculated alongside federal and state income taxes.