FICA Payroll Taxes Explained: Social Security Limits & Medicare Rates (2026)

Every W-2 paycheck in the United States includes mandatory deductions for FICA taxes. This guide explains how the Federal Insurance Contributions Act funds Social Security and Medicare, the 2026 wage base cap, and high-income surtaxes.

1. What Is FICA?

The Federal Insurance Contributions Act (FICA), codified in Title 26, Subtitle C of the Internal Revenue Code, requires employers and employees to fund federal social insurance programs through mandatory payroll taxes.

For standard W-2 employees, the statutory FICA tax rate is 7.65% of gross wages, consisting of two distinct components:

• Social Security (OASDI): 6.20% withheld from wages up to the annual statutory wage base.
• Medicare (Hospital Insurance): 1.45% withheld from all wages with no annual cap.

Employers are required by law to match this contribution dollar-for-dollar, paying an additional 7.65% from company funds. Independent contractors and self-employed individuals pay both portions (15.3% total) under the Self-Employment Contributions Act (SECA).

2. The 2026 Social Security Wage Base Limit ($184,500)

Unlike Medicare, Social Security tax is not levied on unlimited earnings. The Social Security Administration (SSA) adjusts the taxable maximum wage base annually based on the National Average Wage Index.

For Tax Year 2026, the Social Security wage base is set at $184,500. This means:

• The maximum employee Social Security tax that can be withheld in 2026 is $11,439.00 ($184,500 × 6.20%).
• Once your cumulative gross earnings pass $184,500 within the calendar year, your employer stops withholding the 6.2% Social Security tax for the remainder of the year.
• Your paychecks for the remainder of the year experience an instant 6.2% "take-home pay raise"!

3. Medicare Tax & the 0.9% Additional Medicare Surtax

Standard Medicare tax applies to 100% of earned income at a flat 1.45% with no income ceiling. However, the Affordable Care Act (ACA) introduced the 0.9% Additional Medicare Tax on high earners.

Employers must begin withholding an additional 0.9% Medicare tax (raising the employee rate to 2.35%) when wages exceed the statutory threshold for your filing status:

• Single / Head of Household: Wages exceeding $200,000
• Married Filing Jointly: Wages exceeding $250,000
• Married Filing Separately: Wages exceeding $125,000

Unlike standard FICA, the 0.9% Additional Medicare Tax is paid entirely by the employee with zero employer match.

4. FICA Exclusions: Pre-Tax Benefit Savings

Certain employee benefits reduce FICA payroll tax liability, directly increasing your take-home pay efficiency:

• Section 125 Cafeteria Plans: Pre-tax employee contributions to employer-sponsored medical, dental, and vision insurance premiums are exempt from both federal income tax and FICA taxes.
• Health Savings Accounts (HSA): Pre-tax payroll contributions to an HSA avoid FICA taxes (saving 7.65% on up to $4,300 for single coverage or $8,550 for family coverage in 2026).
• Flexible Spending Accounts (FSA): Healthcare and Dependent Care FSAs are also exempt from FICA withholdings.
• Important Distinction: Traditional 401(k) and 403(b) retirement contributions reduce federal income tax, but are still subject to FICA taxes.

To inspect your exact paycheck FICA deductions, use our interactive Paycheck Calculator.