Social Security Tax Calculator: How Much Is Taxable?

How to use this calculator

Choose your filing status and who is 65 or older by the end of 2026.
Enter your Social Security benefits for the year. Use box 5 of Form SSA-1099, or your monthly benefit times 12. Married couples filing jointly add both.
Enter your other taxable income: pensions, IRA and 401(k) withdrawals, wages, taxable interest, dividends and capital gains.
Open the extra fields if you have municipal bond interest or deductible IRA or HSA contributions.

Calcvera’s Social Security tax calculator follows the worksheet in IRS Publication 915 and uses the 2026 tax brackets, standard deduction and senior deduction. Nothing you enter leaves your browser. For your whole return, use the tax refund calculator.

How much of your Social Security is taxable

Up to 85% of your benefits can be taxable, never more. The share depends on your provisional income compared with two amounts set in law that have never been adjusted for inflation:

Filing status	None taxable	Up to 50% taxable	Up to 85% taxable
Single, head of household, qualifying surviving spouse	Up to $25,000	$25,000 to $34,000	Over $34,000
Married filing jointly	Up to $32,000	$32,000 to $44,000	Over $44,000
Married filing separately, lived with spouse	—	—	From the first dollar

“Up to” matters: crossing $34,000 doesn’t make 85% of your benefits taxable at once. Only part of each dollar over the line is added, so the taxable share rises gradually as your income grows.

What is provisional income?

Provisional income, which Social Security calls combined income, is your adjusted gross income without Social Security, plus tax-exempt interest, plus half of your benefits. Qualified Roth IRA withdrawals, gifts and the money you take out of a regular savings account don’t count. A pension, IRA withdrawals and capital gains do, which is why a large withdrawal in one year can make much more of your benefits taxable.

Worked examples

Single, $24,000 in benefits and $20,000 from an IRA, age 65 or older. Provisional income is $20,000 + $12,000 = $32,000, $7,000 over the first line. Half of that, $3,500, is taxable. But AGI of $23,500 is less than the 2026 standard deduction for a single person 65 or older plus the senior deduction, so the federal tax is $0.

Married filing jointly, $40,000 in benefits and $50,000 of pensions and withdrawals, both 65 or older. Provisional income is $70,000, past the $44,000 line, so $28,100 of the benefits (70%) is taxable. Taxable income is $30,600 and the federal tax is $3,176, of which $2,926 comes from the benefits.

Taxable Social Security at different incomes

Single, $24,000 a year in benefits ($2,000 a month), age 65 or older, 2026:

Other income	Provisional income	Taxable benefits	Federal tax
$10,000	$22,000	None	$0
$20,000	$32,000	$3,500 (15%)	$0
$30,000	$42,000	$11,300 (47%)	$1,810
$40,000	$52,000	$19,800 (83%)	$4,030
$50,000	$62,000	$20,400 (85%)	$5,302
$75,000	$87,000	$20,400 (85%)	$10,656

Married filing jointly, $40,000 a year in benefits, both 65 or older, 2026:

Other income	Provisional income	Taxable benefits	Federal tax
$20,000	$40,000	$4,000 (10%)	$0
$30,000	$50,000	$11,100 (28%)	$0
$40,000	$60,000	$19,600 (49%)	$1,210
$50,000	$70,000	$28,100 (70%)	$3,176
$75,000	$95,000	$34,000 (85%)	$6,884
$100,000	$120,000	$34,000 (85%)	$9,884

Federal tax is the tax on the whole return, with the standard deduction and the senior deduction, and no other credits.

The senior deduction and Social Security

The 2025 tax law didn’t stop Social Security from being taxed. Instead, for 2025 to 2028 it added a deduction of up to $6,000 for each person 65 or older, reduced by 6% of income over $75,000 ($150,000 for joint filers). It comes on top of the standard deduction, so a married couple both 65 or older can deduct up to $12,000 more. That is why the federal tax in the tables above is often small even when much of the benefit is taxable. See your amount with the senior deduction calculator.

The tax torpedo: why your rate can jump

Between the two lines, each extra dollar of income can also make 50 or 85 cents of your benefits taxable. A single retiree with $24,000 in benefits and $30,000 of other income is in the 12% bracket. Taking $1,000 more from an IRA makes another $850 of benefits taxable, so taxable income rises by $1,850 and the tax by $222: an effective rate of about 22%. The calculator shows this as the tax on your next $1,000.

Once 85% of your benefits is taxable, the effect stops and your rate falls back to your bracket. Planners call this hump the “tax torpedo”.

Ways to lower the tax on your benefits

Use Roth money. Qualified Roth IRA and Roth 401(k) withdrawals don’t count toward provisional income. Roth conversions in the years before you claim can lower it later. Compare with the Roth conversion calculator.
Give from your IRA. From age 70½, a qualified charitable distribution of up to $111,000 in 2026 goes straight to charity and stays out of your income, and it counts toward your RMD.
Spread large withdrawals. One big withdrawal can push you past the second line. Smaller ones over several years may keep more of your benefits untaxed.
Time capital gains. Gains count in full, even when they are taxed at 0%.
Watch municipal bond interest. It isn’t taxed, but it still counts toward provisional income.

Having tax withheld from your benefits

Social Security doesn’t withhold federal tax unless you ask. To avoid a bill in April, send Form W-4V to Social Security and choose 7%, 10%, 12% or 22% of each payment, or make quarterly estimated payments. The tax on your next $1,000 in the results helps you choose a rate.

Formulas used

Provisional income = other income − adjustments + tax-exempt interest + benefits ÷ 2 Taxable = ½ × min(provisional − first line, second line − first line), up to ½ of benefits + 85% × (provisional − second line), if above it Taxable benefits can’t be more than 85% of benefits Lines: $25,000 and $34,000 (joint $32,000 and $44,000; married filing separately $0)

The calculator doesn’t model lump-sum payments for earlier years, railroad retirement benefits, the foreign earned income exclusion, itemized deductions, credits or state tax. The IRS worksheet in Publication 915 is the final word for your return.

Frequently asked questions

How much of my Social Security is taxable?

It depends on your provisional income: your other income plus half your benefits. Single filers pay tax on none of their benefits up to $25,000, on up to 50% between $25,000 and $34,000, and on up to 85% above that. For married couples filing jointly the amounts are $32,000 and $44,000. No one pays tax on more than 85% of their benefits.

At what age is Social Security no longer taxable?

There is no such age. Whether your benefits are taxable depends on your income, not your age. At 65, though, you get a bigger standard deduction and, for 2025 to 2028, the senior deduction, so many retirees with taxable benefits still owe little or no tax.

Did the 2025 tax law end federal tax on Social Security?

No. The law kept the tax on benefits and added a deduction of up to $6,000 for each person 65 or older for 2025 to 2028, reduced by 6% of income over $75,000 ($150,000 for joint filers). It lowers the tax on benefits for many retirees but doesn’t remove it.

Does tax-exempt interest count toward provisional income?

Yes. Interest from municipal bonds isn’t taxed itself, but it is added to provisional income, so it can make more of your Social Security taxable. Qualified Roth IRA withdrawals don’t count.

How do I have federal tax withheld from my Social Security?

Give Social Security Form W-4V and choose 7%, 10%, 12% or 22% of each payment. You can also make quarterly estimated tax payments instead.

Is Social Security taxable if I’m married filing separately?

If you lived with your spouse at any time during the year, the base amount is $0, so up to 85% of your benefits is taxable from the first dollar. If you lived apart all year, you use the single amounts of $25,000 and $34,000: choose single in the calculator.

Do states tax Social Security benefits?

Most states don’t. A few tax part of the benefits, usually with exemptions based on age or income, so check with your state’s revenue department. This calculator covers federal income tax only.

Sources

Publication 915, Social Security and Equivalent Railroad Retirement Benefits — Internal Revenue Service
Topic no. 423, Social Security and equivalent railroad retirement benefits — Internal Revenue Service
Income taxes and your Social Security benefit — Social Security Administration
One, Big, Beautiful Bill provisions — enhanced deduction for seniors — Internal Revenue Service
About Form W-4V, Voluntary Withholding Request — Internal Revenue Service

Key terms

Provisional income (combined income)

About this calculator. Calcvera’s Social Security Tax Calculator: How Much Is Taxable? is written and maintained by Hassan Arslan and was last reviewed on October 21, 2026. Rules and figures are checked against “Publication 915, Social Security and Equivalent Railroad Retirement Benefits”, “Topic no. 423, Social Security and equivalent railroad retirement benefits” and the other sources listed above. Results are estimates for education — not financial, tax or legal advice. Found an error? Tell us and we'll fix it. See our methodology and editorial policy.