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How Much of My Social Security Is Taxable?
A Social Security taxable calculator.

This Social Security taxable calculator shows how much of your benefits the IRS counts as income. Enter your filing status, benefits and other income, and it works through the official provisional income worksheet one line at a time, using the fixed $25,000, $32,000, $34,000 and $44,000 thresholds.

How it worksIRS worksheet

Filing status

How you file

Base amount $25,000, second threshold $34,000. These figures are set in the tax code and are the same every year.

Social Security

Yearly benefits (everyone on the return)

$/yr

Use the total in box 5 of Form SSA-1099, which is before Medicare premiums come out. Married filing jointly: add both spouses.

Everything else

Other income for the year

Taxable pensions, wages, IRA and 401(k) withdrawals, interest, dividends and capital gains. Leave out Social Security. Qualified Roth withdrawals are not income.

Tax-exempt interest

Municipal bond interest counts here even though it is not taxed.

Adjustments to income (optional)

Deductions that sit above AGI, such as HSA or self-employed deductions (Schedule 1 lines 11 to 20, 23 and 25). Not the standard deduction. Not student loan interest.

Federal bracket, for a rough tax estimate

Taxable Social Security benefits

$11,300

That is 47.1% of your $24,000 in benefits. You are in the 85% tier. The other $12,700 is not taxed federally.

Taxable $11,300Not taxable $12,700

Provisional income vs the thresholds

$42,000

Left tick: $25,000
50% tier startsRight tick: $34,000
85% tier starts

Other income at which the 85% ceiling is reached$40,706

Each extra $1,000 of income adds about$850 taxable benefits

In this zone, $1,000 of extra income also makes about $850 more of your benefits taxable, so your taxable income rises by about $1,850. People sometimes call this the Social Security tax torpedo.

Rough federal tax on the taxable part

Taxable benefits$11,300

Bracket used12%

Estimated tax on benefits$1,356

As a share of your benefits5.7%

One flat rate is a shortcut. If the taxable benefits straddle two brackets the real figure is a blend, and credits and deductions change it too. Use an income tax calculator for the full return.

The IRS worksheet, line by line

Line numbers follow Worksheet 1 in IRS Publication 915 (2025 edition).

1.Net Social Security benefits for the year (Form SSA-1099, box 5)$24,000
2.Half of your benefits$12,000
3.Other income: wages, pensions, IRA and 401(k) withdrawals, interest, dividends, capital gains$30,000
4.Tax-exempt interest$0
5.Certain exclusions (savings-bond interest, adoption benefits, foreign earned income); not modeled$0
6.Lines 2 through 5 added together$42,000
7.Adjustments to income that count (Schedule 1 lines 11 to 20, 23 and 25)$0
8.Provisional income: line 6 minus line 7$42,000
9.Base amount for your filing status$25,000
10.Provisional income above the base amount (line 8 minus line 9)$17,000
11.Size of the first tier ($9,000, or $12,000 if married filing jointly)$9,000
12.Provisional income above the second threshold (line 10 minus line 11, not below zero)$8,000
13.Smaller of line 10 or line 11$9,000
14.Half of line 13$4,500
15.Smaller of line 2 or line 14 (the 50% tier)$4,500
16.85% of line 12 (the 85% tier)$6,800
17.Line 15 plus line 16$11,300
18.85% of your benefits (the legal cap)$20,400
19.Taxable Social Security benefits: smaller of line 17 or line 18$11,300

The taxable part is added to your other income and taxed at your regular federal rates; it is not taxed at 50% or 85%. Deductions such as the standard deduction or the senior deduction lower taxable income after this step, so they do not change the share of benefits that is taxable. Some states tax benefits separately, which this tool does not cover.

Field guide

How Social Security benefits become taxable.

Social Security is not taxed like a paycheck. The IRS looks at your other income, adds half of your benefits, and compares the total with a threshold for your filing status. Stay under it and no benefits are taxed. Go over it and part of your benefits, never more than 85%, is added to your taxable income and taxed at your ordinary federal rates.

Step 1: find your provisional income

provisional income = other income − adjustments + tax-exempt interest + 50% of benefits

Other income means taxable pensions, wages, IRA and 401(k) withdrawals, interest, dividends and capital gains. Adjustments are deductions that sit above adjusted gross income, such as an HSA deduction. Tax-exempt interest, including municipal bond interest, is added back even though it is not taxed. Use the net benefits shown in box 5 of Form SSA-1099, before Medicare premiums are taken out.

Step 2: compare it with the base amounts

Single, head of household, qualifying surviving spouse: $25,000 base, $34,000 for the 85% tier.
Married filing jointly: $32,000 base, $44,000 for the 85% tier.
Married filing separately, lived apart all year: same as single.
Married filing separately, lived together at any time: $0, so benefits are taxable from the first dollar.

These amounts come from section 86 of the tax code. They are fixed dollar figures that are never adjusted for inflation, so as incomes and prices rise, more retirees cross them over time.

Step 3: apply the 50% and 85% tiers

taxable = smaller of (50% tier + 85% tier) and (85% of benefits)

The 50% tier is half of the provisional income between the base amount and the second threshold, but never more than half of your benefits. The 85% tier is 85% of provisional income above the second threshold. Add the two, then cap the total at 85% of your benefits. The calculator prints every line of the IRS worksheet so you can follow along.

Example: single filer in the 50% tier

Maria receives $20,000 in benefits and has $18,000 of other income. Her provisional income is $10,000 + $18,000 = $28,000, which is $3,000 over the $25,000 base. Half of that, $1,500, is taxable. That is 7.5% of her benefits.

Example: married couple in the 85% tier

A couple filing jointly collects $36,000 in benefits, has $50,000 of other income and $2,000 of municipal bond interest. Provisional income is $18,000 + $50,000 + $2,000 = $70,000. The 50% tier is worth $6,000 and the 85% tier adds 85% of the $26,000 above $44,000, which is $22,100. Together that is $28,100, or 78% of their benefits, under the $30,600 cap.

Why a little extra income can cost more

Between the base amount and the cap, each extra dollar of income can make another 50 or 85 cents of benefits taxable. A $1,000 IRA withdrawal in the 85% tier raises your taxable income by about $1,850. Planning withdrawals across years, or drawing from Roth accounts, can keep provisional income lower. The calculator shows how much more you can add before the next tier starts.

What this calculator does not model

It covers federal income tax only. A few states tax some benefits and most do not, so check your state revenue department. It also leaves out the lump-sum election for back benefits, the special worksheets for people who deduct a traditional IRA contribution while covered by a workplace plan, and the foreign income and savings bond exclusions. The tax estimate uses one bracket and is a rough guide.

Disclaimer

This calculator is for informational planning purposes only and does not constitute tax, legal or financial advice. It estimates the taxable part of Social Security benefits using the federal rules in Internal Revenue Code section 86 and IRS Publication 915, and it does not account for state taxes, the items listed above or the full details of your return. It is not affiliated with, endorsed by, or connected to the IRS or the Social Security Administration. Check your Form SSA-1099 and your tax return instructions, and consult a CPA or tax professional before relying on these results.

Last reviewed: 2026-10-23

The base amounts, the 50% and 85% tiers and the worksheet lines follow Internal Revenue Code section 86 and Worksheet 1 in IRS Publication 915, which uses a $25,000 or $32,000 base amount and a $34,000 or $44,000 second threshold. Rates, thresholds, and formulas are checked against IRS — Publication 915, Social Security and Equivalent Railroad Retirement Benefits and updated when the underlying rules change.

FAQ

Frequently asked

Is Social Security taxable?+

Sometimes. Federal income tax applies to part of your benefits when your provisional income, which is half your benefits plus your other income, is above $25,000 for a single filer or $32,000 for a joint return. At most 85% of your benefits is ever included in taxable income, and for many retirees the answer is none.

What is provisional income?+

It is the figure the IRS compares with its thresholds. Take your income other than Social Security, subtract adjustments to income such as an HSA deduction, add tax-exempt interest, and add half of your Social Security benefits. Some writers call it combined income. The result decides whether 0%, up to 50% or up to 85% of benefits is taxable.

What are the income thresholds for taxing Social Security in 2026?+

The base amounts are $25,000 for single, head of household and qualifying surviving spouse filers, and $32,000 for married filing jointly. The 85% tier starts at $34,000 and $44,000. Married filing separately and living together has a $0 base. These dollar figures are written into the tax code and are not adjusted for inflation, so 2026 matches earlier years.

Does 85% taxable mean I pay 85% of my benefits in tax?+

No. It means 85% of your benefits is added to your taxable income and then taxed at your normal federal rates. Someone in the 12% bracket whose benefits are 85% taxable pays about 10.2 cents of federal tax per dollar of benefits, and someone in the 22% bracket pays about 18.7 cents. The 85% is never a tax rate.

Do Roth withdrawals, the standard deduction or municipal bonds change the answer?+

Qualified Roth IRA and Roth 401(k) withdrawals are not income, so they stay out of provisional income. The standard deduction and the senior deduction lower taxable income after the benefit calculation, so they do not change the share of benefits that is taxable. Tax-exempt municipal bond interest does count, which surprises many retirees.

Can I have federal tax withheld from my Social Security check?+

Yes. You can ask the Social Security Administration to withhold federal income tax from your benefits by filing IRS Form W-4V. The other route is to make quarterly estimated tax payments or raise withholding on a pension or retirement account distribution. Either way, any shortfall is settled when you file your return.

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