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Social Security Tax Basics

See how you pay Social Security tax while working and when your benefits become taxable later.

TL;DR

  1. Pay 6.2% of wages in Social Security tax up to the wageBase.
  2. Figure combinedIncome to see how much of your benefit is taxable.
  3. Expect at most 85% of benefits to be taxed, never the fullBenefit.
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Paying In While You Work

    Employee Share

    Taken from each paycheck on top of income tax.

    6.2% of wages
    Employer Match

    Your employer pays the same amount again on your behalf.

    6.2% + 6.2% = 12.4% total
    Self-Employed

    You pay both halves as part of self-employment tax.

    12.4% SS + 2.9% Medicare = 15.3%
    Earned Income Only

    It applies to wages and self-employment profit, not investments.

    No SS tax on interest or gains

The Wage Base

    2026 Cap

    Wages above this amount owe no Social Security tax.

    $184,500 (up from $176,100)
    Maximum Tax

    The most an employee pays in Social Security tax for 2026.

    $184,500 x 6.2% = $11,439
    Medicare Has No Cap

    Medicare tax continues on every dollar of wages.

    1.45% + 0.9% above $200,000
    Two Jobs Over the Cap

    Extra tax withheld by multiple employers comes back at filing.

    Excess = credit on your 1040

When Benefits Are Taxed

    Combined Income

    The number that decides how much of your benefit is taxed.

    AGI + tax-free interest + 50% SS
    No Tax

    Below the first line, benefits are completely tax-free.

    Under $25,000 single / $32,000 joint
    Up to 50%

    In the middle range, up to half of benefits can be taxed.

    $25k-$34k single / $32k-$44k joint
    Up to 85%

    Above the top line, up to 85% can be taxed, never 100%.

    Over $34,000 single / $44,000 joint

Keep More of Your Benefit

    Roth Withdrawals

    Qualified Roth money does not count toward combined income.

    Roth $1 = $0 of combined income
    Charitable IRA Gifts

    From age 70 1/2, IRA gifts sent straight to charity skip your AGI.

    QCD: IRA -> charity, not income
    Senior Deduction

    People 65 and older get an extra deduction through 2028.

    Up to $6,000 per person
    Time IRA Withdrawals

    Drawing more before claiming benefits can lower later tax.

    Bigger IRA draws before claiming

Tips

  1. Draw from a RothIRA in retirement when you can, since those withdrawals do not count toward the combined income that taxes benefits.
  2. Check your pay stubs if you work two jobs; Social Security withheld above the wageBase comes back as a credit on your return.

Warnings

  1. Tax-free municipalBond interest still counts toward combined income, so it can make more of your benefit taxable.
  2. The combinedIncome thresholds have never been raised for inflation, so more retirees owe tax on benefits every year.

In Practice

FAQ