Social Security tax on bonuses is withheld at the same 6.2% rate that comes out of your regular paycheck, because the IRS treats a bonus as wages. What changes the math is the annual wage base: in 2026, Social Security tax only applies to the first $184,500 of your combined pay. Once your year-to-date earnings cross that line, the 6.2% withholding stops, and any bonus paid after that point escapes Social Security tax entirely.1Social Security Administration. Contribution and Benefit Base
Why Your Bonus Is Taxed Like Salary
The IRS classifies bonuses as “supplemental wages,” a bucket that also holds commissions, overtime, and back pay.2eCFR. 26 CFR 31.3402(g)-1 – Supplemental Wage Payments The label is separate, but the FICA treatment isn’t. For Social Security and Medicare purposes, a dollar of bonus is a dollar of wages.3Office of the Law Revision Counsel. 26 USC 3121 – Definitions
Your share of FICA on a bonus:
- Social Security: 6.2%, applied only up to the $184,500 wage base in 2026
- Medicare: 1.45%, with no cap
Your employer pays the same 6.2% and 1.45% on top of your wages.4Office of the Law Revision Counsel. 26 USC 3101 – Rate of Tax That match doesn’t appear on your pay stub, but it doubles the FICA moving on your behalf up to the cap.
The 2026 Wage Base and Why Timing Decides the Bill
Social Security tax applies to a capped amount of earnings each year. For 2026 that cap is $184,500, which puts the maximum an employee can pay in Social Security tax at $11,439 for the year.5Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates Your employer tracks your cumulative wages and stops withholding the 6.2% the moment your year-to-date pay crosses the line.
That’s why two people with identical bonuses can walk away with very different checks.
Bonus Paid Early in the Year
Say you’ve earned $90,000 in salary through March and then receive a $40,000 bonus. Your running total is $130,000, comfortably under the cap. The full $40,000 gets the 6.2% Social Security deduction, or $2,480. Medicare adds another $580.
Bonus Paid After You’ve Nearly Hit the Cap
Now imagine you’ve earned $180,000 in salary by November and then receive a $30,000 bonus. Only the first $4,500 of that bonus takes you up to $184,500, so Social Security tax applies to just that slice, a $279 deduction. The other $25,500 has no Social Security tax on it at all. Medicare still applies to the whole $30,000.
Same $30,000 bonus, two very different Social Security bills: $1,860 if paid in February, $279 or less if paid in December.
Checking Your W-2 for Correct Withholding
Your bonus shows up on your W-2 alongside the rest of your pay: Box 1 for total wages, Box 3 for Social Security wages (capped at $184,500), and Box 5 for Medicare wages (no cap).6Internal Revenue Service. About Form W-2, Wage and Tax Statement Box 3 is the fastest place to check that your employer stopped Social Security withholding at the right point. If it reads higher than $184,500, you’ve been over-withheld and the employer should correct it.
What to Do If Two Employers Both Withheld
A single employer is required to track your cumulative wages and stop at the cap. Two employers don’t talk to each other, and each will withhold Social Security tax on your full pay independently. If you earn $120,000 at one job and $100,000 at another, both employers withhold on your full pay, producing a combined $13,640 in Social Security withholding, well over the $11,439 maximum.
You recover the excess by claiming a credit on your Form 1040 when you file. If you’re filing jointly, each spouse calculates the excess separately.7Internal Revenue Service. Topic No. 608, Excess Social Security and RRTA Tax Withheld
If a single employer over-withholds through a payroll glitch, they should correct it on their end. If they can’t or won’t, the excess can also be claimed as a credit on your return.
Gift Cards and Other Non-Cash Bonuses
A bonus doesn’t have to arrive as a check to be taxed. Gift cards, merchandise, and other non-cash awards are generally treated as wages and pulled into FICA the same way cash is. The IRS is explicit that gift cards redeemable for merchandise or convertible to cash are never excludable, no matter how small.8Internal Revenue Service. De Minimis Fringe Benefits A $50 Amazon gift card handed out at the holidays is wages, its value goes on your W-2, and Social Security and Medicare are withheld on it.
The de minimis exclusion is narrow. It covers items so small and infrequent that tracking them would be impractical, like an occasional holiday turkey or team lunch, and the IRS has said items over $100 in value generally can’t qualify.8Internal Revenue Service. De Minimis Fringe Benefits
FICA Is Not the 22% You See on Your Pay Stub
The big deduction that makes a bonus check feel small is usually federal income tax withholding, which most employers apply at a flat 22% on bonuses under $1 million.9Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide That 22% is separate from FICA and behaves differently: it’s a prepayment against your annual income tax, and any over- or under-withholding gets reconciled when you file your return.
Social Security and Medicare don’t work that way. The 6.2% and 1.45% taken from your bonus are the tax, not a prepayment, and there’s no bracket adjustment at filing time. Whether Social Security tax applies to your bonus is settled the moment the check is issued, based on where your year-to-date wages sit against the $184,500 cap.