The Social Security tax on your paycheck is a mandatory payroll deduction of 6.2% of your gross wages, withheld by your employer up to an annual earnings cap of $184,500 in 2026.1Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet Your employer pays a matching 6.2% on top of that, and the combined 12.4% funds retirement, disability, and survivor benefits through the federal Old-Age, Survivors, and Disability Insurance program.
Why It Shows Up as FICA
The line on your stub is usually labeled FICA, for the Federal Insurance Contributions Act. That law, codified in Title 26, Chapter 21 of the Internal Revenue Code, requires your employer to withhold Social Security and Medicare taxes from your wages and forward them to the federal government.2Office of the Law Revision Counsel. 26 U.S. Code 3101 – Rate of Tax Some employers combine both taxes into a single FICA line; others split them out. Either way, the Social Security portion is the 6.2% piece.
The other piece is Medicare, withheld at 1.45% of your wages with no cap.2Office of the Law Revision Counsel. 26 U.S. Code 3101 – Rate of Tax Once your wages pass $200,000 in a calendar year, an extra 0.9% Additional Medicare Tax kicks in on the amount above that threshold, and your employer withholds it regardless of your filing status.3Internal Revenue Service. Topic No. 560, Additional Medicare Tax Add it up and most paychecks show 7.65% going to FICA overall (6.2% Social Security plus 1.45% Medicare).
The 2026 Rate and Wage Base
The 6.2% employee rate has held steady since 1990. It’s set by statute and doesn’t change from year to year.4Social Security Administration. Social Security and Medicare Tax Rates What does change is the wage base, the cap on how much of your yearly earnings is subject to the tax. For 2026 that cap is $184,500.1Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet
Once your year-to-date wages cross $184,500, your employer stops withholding Social Security tax for the rest of the year.5Social Security Administration. What Is the Current Maximum Amount of Taxable Earnings for Social Security Every dollar you earn after that is free of the 6.2% deduction. If you hit the cap exactly, you’ll have paid $11,439 in Social Security tax for the year. Most workers never come close, so the withholding runs on every paycheck from January through December.
What Your Employer Pays
Your employer owes an identical 6.2% on the same wages, up to the same $184,500 cap.6Office of the Law Revision Counsel. 26 U.S. Code 3111 – Rate of Tax That share is a separate business expense. It doesn’t come out of your paycheck and doesn’t reduce your gross pay. The employer withholds your 6.2%, adds its own 6.2%, and sends the combined amount to the Treasury.
When Too Much Is Withheld
If you work two or more jobs in the same year, you can end up overpaying. Each employer withholds based only on what it pays you, without knowing what the other employers are doing. When your combined wages cross $184,500, each employer may still be withholding the full 6.2% on its share, pushing your total past the $11,439 annual maximum.
The excess is recoverable. You claim it as a credit on Schedule 3, Part II, Line 11 of Form 1040, using your W-2s from each employer to calculate the total withheld.7Internal Revenue Service. Topic No. 608, Excess Social Security and RRTA Tax Withheld The credit either lowers what you owe or increases your refund.
The fix is different if a single employer withheld too much on its own. Ask that employer to correct the error and refund the excess directly. Only claim the credit on your return if the employer won’t or can’t fix it.
Who Doesn’t Pay Social Security Tax
Most workers have no choice about paying, but a few narrow categories are exempt.
- Foreign nationals in the U.S. on F-1, J-1, M-1, or Q-1 visas are exempt from FICA while they remain nonresident aliens for tax purposes and the work fits the visa’s purpose. Once they become U.S. tax residents or switch visa types, the exemption ends.8Internal Revenue Service. Taxation of Alien Individuals by Immigration Status – J-1
- Members of recognized religious sects that are conscientiously opposed to insurance benefits and that have provided for their own members continuously since December 31, 1950 (such as the Amish and some Mennonite communities) can apply for an exemption by filing IRS Form 4029. Approval requires permanently waiving all rights to Social Security and Medicare benefits.9Social Security Administration. Are Members of Religious Groups Exempt from Paying Social Security Taxes
- Election workers and poll workers who earn less than $2,500 in 2026 aren’t subject to Social Security tax on those wages.10Social Security Administration. Employment Coverage Thresholds
Some state and local government employees hired before certain dates are covered under an alternative pension system rather than Social Security, though this is increasingly rare for new hires.
What the Tax Buys You
The money withheld from your paycheck flows into two federal trust funds that pay three categories of benefits: retirement, disability, and survivor benefits. The system is pay-as-you-go, meaning today’s payroll taxes fund today’s beneficiaries. The trust funds hold any surplus, but they don’t set aside money in an individual account tied to your name.
Retirement benefits are the piece most people picture. You need at least 40 credits to qualify, which takes about ten years of work. In 2026, each $1,890 in covered earnings buys one credit, up to four credits per year, so $7,560 in wages maxes out your credits for the year.11Social Security Administration. Social Security Credits and Benefit Eligibility Your eventual monthly check depends on your 35 highest-earning years, the age you start collecting, and the benefit formula in effect at that time.
Disability insurance provides monthly income to workers whose medical conditions prevent them from working, provided they’ve earned enough credits for their age. Survivor benefits go to the spouses and children of workers who die, and a special rule allows benefits for surviving children and their caregiving parent even when the deceased worker hadn’t yet earned the usual number of credits.11Social Security Administration. Social Security Credits and Benefit Eligibility The 6.2% coming off your paycheck each pay period is what keeps you inside all three of those programs.