The Social Security tax limit for 2026 is $184,500. Wages and self-employment income above that amount are not subject to the 6.2% Social Security payroll tax for the rest of the calendar year.1Social Security Administration. Contribution and Benefit Base That means the most an employee will pay in Social Security tax this year is $11,439.00, and the most a self-employed worker will pay is $22,878.00.
The 2026 Wage Base
The formal name for the limit is the “contribution and benefit base.” It rose to $184,500 for 2026, up from $176,100 in 2025 and $168,600 in 2024.1Social Security Administration. Contribution and Benefit Base Federal law requires the Social Security Administration to recalculate it annually based on the National Average Wage Index.2Office of the Law Revision Counsel. 42 USC 430 – Adjustment of Contribution and Benefit Base
The word “benefit” in the name matters. Earnings above the cap escape the tax, but they also don’t count toward your future Social Security benefit calculation. High earners who stop paying in past $184,500 also stop building credit past that point.
What Employees and Employers Pay
The employee Social Security tax rate is 6.2% of wages.3Office of the Law Revision Counsel. 26 USC 3101 – Rate of Tax Applied to the $184,500 cap, that produces a maximum employee contribution of $11,439.00. Your employer owes the same $11,439.00 on your behalf, for a combined maximum of $22,878.00 from a single job.1Social Security Administration. Contribution and Benefit Base
Withholding is automatic. Once your year-to-date wages cross $184,500 with a given employer, the 6.2% withholding stops for both you and that employer through December 31.
Self-Employment Tax
If you work for yourself, you pay both halves. The combined Social Security rate is 12.4% on net self-employment income, capped at the same $184,500 wage base, for a maximum of $22,878.00.4Office of the Law Revision Counsel. 26 USC 1401 – Rate of Tax
Two adjustments matter. First, the tax doesn’t apply to your full net profit: multiply net earnings by 92.35% before applying the 12.4% rate.5Internal Revenue Service. Topic No. 554, Self-Employment Tax Second, you can deduct half of your self-employment tax when calculating adjusted gross income, which reduces your income tax even though it doesn’t reduce the self-employment tax itself.6Office of the Law Revision Counsel. 26 USC 164 – Taxes
Self-employment tax is typically paid through quarterly estimated payments. If you also hold a W-2 job, your wages from that job count first toward the $184,500 cap, and only the remaining room under the limit is subject to self-employment Social Security tax.7Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
The Limit Does Not Apply to Medicare
The $184,500 cap is specific to Social Security. Every dollar of wages and self-employment income remains subject to the 1.45% Medicare tax (2.9% for the self-employed), with no ceiling.8Internal Revenue Service. Social Security and Medicare Withholding Rates Social Security withholding stops once you hit the wage base; Medicare withholding never does. High earners also face an additional 0.9% Medicare surtax above thresholds that vary by filing status, and those thresholds are not indexed for inflation.9Internal Revenue Service. Topic No. 560, Additional Medicare Tax
If You Worked Multiple Jobs
Each employer withholds independently. If you held two or more jobs and your combined wages exceeded $184,500, both employers kept withholding 6.2% past the cap because neither knew about the other. Claim the overpayment as a credit on your federal return using Schedule 3 (Form 1040), line 11.10Internal Revenue Service. Topic No. 608, Excess Social Security and RRTA Tax Withheld Box 4 on each W-2 shows the Social Security tax withheld; add them together to find your excess.
The rules change if a single employer over-withheld. You cannot claim that on your return. Ask the employer to correct the error and refund the difference. If they won’t, file Form 843 (Claim for Refund and Request for Abatement) with the IRS and attach copies of your W-2s.10Internal Revenue Service. Topic No. 608, Excess Social Security and RRTA Tax Withheld Using the multi-employer credit for a single-employer mistake will delay your refund.