Taxable Social Security Benefits Calculator

Enter your annual Social Security benefits, your other income, and any tax-exempt interest to see how much of your benefits the IRS counts as taxable income.

The short answer: between 0% and 85% of your Social Security benefits are taxable, depending on your provisional income, which is your other income plus tax-exempt interest plus half your benefits. Single filers pay no tax on benefits below $25,000 of provisional income, up to 50% is taxable between $25,000 and $34,000, and up to 85% above $34,000. For married couples filing jointly, the thresholds are $32,000 and $44,000. These thresholds come from the Social Security Administration and haven't been adjusted for inflation since they were set.

This calculator is for informational purposes only. Results are estimates; the official calculation is the worksheet in IRS Publication 915.

What each input means

How provisional income works

Provisional income = other AGI + tax-exempt interest + 50% of Social Security benefits

Then compare it to your thresholds:

Municipal bond interest is tax-free on its own, but it still counts in provisional income, so it can make your benefits taxable.

The formula the calculator uses

For single filers (joint-filer amounts in parentheses):

• Provisional income at or below $25,000 ($32,000): taxable benefits = $0.
• Between $25,000 and $34,000 ($32,000 and $44,000): taxable benefits = the lesser of 50% of benefits or 50% of provisional income above $25,000 ($32,000).
• Above $34,000 ($44,000): taxable benefits = the lesser of 85% of benefits, or 85% of provisional income above $34,000 ($44,000) plus the lesser of $4,500 ($6,000) or 50% of benefits.

The calculator also estimates the extra federal income tax caused by the taxable benefits: it figures 2026 tax with and without them, using the standard deduction plus the extra $2,050 ($1,650 per spouse if married) for each person 65 or older and the senior deduction of up to $6,000 per person. The senior deduction shrinks by 6% of modified AGI above $75,000 ($150,000 joint), and because taxable benefits raise MAGI, they can shrink it too. It assumes your other income is all ordinary income, so qualified dividends and long-term gains taxed at 0% or 15% can make the real figure lower.

Worked examples

Example 1: a couple whose benefits aren't taxed

• Social Security: $28,000; pension: $15,000; no tax-exempt interest
• Provisional income: $15,000 + $0 + ($28,000 × 50%) = $29,000
• That's below the $32,000 joint threshold, so $0 of their benefits is taxable.

Example 2: a single retiree just over the second threshold

• Social Security: $20,000; IRA withdrawals: $22,000; muni interest: $3,000
• Provisional income: $22,000 + $3,000 + $10,000 = $35,000
• Lesser of $4,500 or 50% of benefits ($10,000) = $4,500
• Plus 85% × ($35,000 − $34,000) = $850
• Taxable benefits: $4,500 + $850 = $5,350, well under the cap of 85% × $20,000 = $17,000

Example 3: a retiree at the 85% cap

• Social Security: $30,000; pension: $35,000; dividends: $10,000; muni interest: $5,000
• Provisional income: $45,000 + $5,000 + $15,000 = $65,000
• Formula: $4,500 + 85% × ($65,000 − $34,000) = $30,850
• Cap: 85% × $30,000 = $25,500
• Taxable benefits: $25,500, which is added to the $45,000 of other income

The married-filing-separately trap

If you're married, file separately, and lived with your spouse at any time during the year, your base amount is $0. Up to 85% of your benefits becomes taxable from the first dollar of provisional income: the taxable amount is the lesser of 85% of benefits or 85% of provisional income.

Example: a married retiree filing separately receives $22,000 of benefits and has $10,000 of other income. Provisional income is $10,000 + $11,000 = $21,000. Taxable benefits: the lesser of 85% × $22,000 ($18,700) or 85% × $21,000 ($17,850) = $17,850. Filing jointly, or living apart for the entire year, would bring back the regular thresholds. If you lived apart all year, you use the single-filer $25,000 and $34,000 amounts even though you file separately, and you check the box on Form 1040 line 6d to tell the IRS.

How taxable benefits show up on your return

• Form SSA-1099 arrives each January. Box 5 shows your net benefits for the year.
• Form 1040, line 6a reports total benefits, and line 6b reports the taxable portion this calculator estimates.
• Lump-sum back payments. If you received benefits in 2026 that belonged to earlier years, you can elect to figure the taxable amount using each earlier year's income, which can lower the tax. Pub. 915 has the worksheets, and you check the box on line 6c when you use the election.
• Repaid benefits. If you paid back more than you received in a year, box 5 can be negative, and you may be able to deduct the excess or claim a credit, depending on the amount.

The "tax torpedo": why your marginal rate can jump

In the phase-in ranges, each extra dollar of other income also makes 50 or 85 cents of benefits taxable. That stacks.

Example: a single 66-year-old receives $24,000 of Social Security and has $30,000 of IRA withdrawals and other income.

• Provisional income: $30,000 + $12,000 = $42,000 → taxable benefits $11,300
• Withdrawing $1,000 more raises provisional income to $43,000 → taxable benefits $12,150
• So $1,000 of extra income adds $1,850 of taxable income
• After the $16,100 standard deduction, the $2,050 age-65 addition, and the $6,000 senior deduction, this retiree is in the 12% bracket, so the $1,000 costs $1,850 × 12% = $222, an effective 22.2% marginal rate

In the 22% bracket the same effect produces about a 40.7% marginal rate (1.85 × 22%). Once you reach the 85% cap, the torpedo stops, and each dollar is taxed at your normal rate again.

The senior deduction doesn't change the taxable share

The One Big Beautiful Bill Act added a deduction of up to $6,000 per person age 65 or older for 2025 through 2028, reduced by 6% of modified AGI above $75,000 (single) or $150,000 (joint). Married couples must file jointly to claim it. It lowers your taxable income, and for many retirees it wipes out the tax on their benefits, but it doesn't change the provisional income formula or the share of benefits that's taxable. The calculator applies it in the tax estimate, not in the taxable-benefits figure. Estimate it with the senior deduction calculator, and read the senior tax deduction guide for the details.

Strategies to reduce tax on benefits

1. Roth conversions before claiming or before RMDs. Converting in low-income years shrinks future required distributions, and qualified Roth withdrawals don't count in provisional income. The Roth conversion calculator shows the cost in each bracket.
2. Delay claiming. Waiting from 62 to 70 raises a monthly benefit by about 77% for someone with a full retirement age of 67, and leaves years with no benefits counted in provisional income. See when to claim Social Security.
3. Qualified charitable distributions. At 70½ or older, you can give up to $111,000 in 2026 directly from an IRA to charity. QCDs count toward RMDs but stay out of AGI.
4. Manage the timing of gains and withdrawals. Bunch large IRA withdrawals or capital gains into one year to reach the 85% cap once instead of sitting in the torpedo zone every year.
5. Rethink municipal bonds. Their interest still counts in provisional income.

To see how a planned withdrawal affects your total tax, combine this tool with the IRA withdrawal tax calculator.

State taxes on Social Security

Most states don't tax Social Security. For 2026, eight states still tax benefits to some degree: Colorado, Connecticut, Minnesota, Montana, New Mexico, Rhode Island, Utah, and Vermont. Most of them exempt benefits for retirees below an income or age threshold. West Virginia completed its phase-out, with a 100% exemption starting in tax year 2026, according to the West Virginia Tax Division. Kansas, Missouri, and Nebraska also stopped taxing benefits in recent years.

Paying the tax on your benefits

You have two options if your benefits are taxable:

• Voluntary withholding. Send Form W-4V to the Social Security Administration and choose 7%, 10%, 12%, or 22% of each payment.
• Quarterly estimated payments with Form 1040-ES.

If you also have IRA distributions, raising withholding on those can be easier, since the custodian lets you pick any percentage.

Survivors' and disability benefits (SSDI) follow the same rules. Supplemental Security Income (SSI) isn't taxable. For a fuller explanation, see how Social Security benefits are taxed and the Social Security calculator.