The rate and the cap
6.2 percent on wages up to the annual Social Security wage base. The 2026 wage base is $184,500 (up from $176,100 in 2025). SSA publishes the new base each fall, indexed to wage growth. Once your year-to-date wages cross the base, Social Security tax stops for the rest of the calendar year.
Employer match
Your employer pays an equal 6.2 percent on the employer side. So Social Security is funded by 12.4 percent total per worker, capped at the wage base.
What it funds
Old Age, Survivors and Disability Insurance (OASDI). Retirement benefits at 62+ (full at full retirement age, currently 67 for those born 1960+). Disability benefits for workers and dependents. Survivor benefits for spouses and minor children.
Multi-employer overpayment
Each employer caps Social Security tax at the wage base separately. If you have multiple employers and total wages exceed the base, you may overpay Social Security. Claim the excess as a refundable credit on your federal tax return.
Self-employment
1099 contractors pay both halves: 12.4 percent on net earnings up to the wage base. Half is deductible above the line.
Future benefit calculation
Your benefit at retirement is calculated from your highest 35 years of earnings (indexed). The Social Security Administration sends an annual statement showing your earnings record and projected benefits.
Common pay stub labels
SOC SEC, OASDI, SS, FICA-SS. The amount equals 6.2 percent of paycheck wages, capped once you hit the annual base.