Social Security Taxable Calculator: How Much of Your Benefits Are Taxed

1. Pick your filing status. If you are married filing separately, answer the lived-with-spouse question, because it changes the base amount to $0.
2. Enter your net Social Security benefits from box 5 of your SSA-1099, your other income (your AGI without Social Security) and any tax-exempt interest.
3. Read the taxable portion, the percent of benefits taxed, your provisional income and which tier applies.

Social Security retirement, survivor and disability benefits can be partly subject to federal income tax. How much depends on your other income. The rule comes from Internal Revenue Code section 86 and is laid out in the IRS Social Security Benefits Worksheet in Publication 915 and the Form 1040 instructions.

The test uses provisional income, also called combined income: your adjusted gross income without Social Security, plus any tax-exempt interest, plus half of your net benefits. Compare that figure to two thresholds for your filing status. If it is below the first, none of your benefits are taxed. Above the thresholds, 50% and then up to 85% of benefits become taxable.

Only the benefits are affected. The percentages are not a tax rate. They set how much of your benefit is added to taxable income, which is then taxed at your ordinary rate. To see how that income flows into your paycheck math, use the take-home pay guide.

The calculator reproduces the IRS Social Security Benefits Worksheet (Publication 915, Worksheet 1) line by line, including the 85% cap on line 18.

The base amount is $25,000 for single, head of household and qualifying surviving spouse filers, and $32,000 for married filing jointly. The second-tier amount on top of the base is $9,000 single and $12,000 joint, which is why the Social Security Administration quotes second thresholds of $34,000 and $44,000.

1. Half your benefits. Take 50% of the net benefits in SSA-1099 box 5.
2. Provisional income. Add your other income and tax-exempt interest to that half.
3. First threshold (base). If provisional income is at or below the base, none of your benefits are taxable. Stop here.
4. 50% tier. Between the base and the second threshold, up to half of the amount over the base is taxable, limited to half of your benefits.
5. 85% tier. Above the second threshold, 85% of the excess is added on top.
6. The cap. The total is never more than 85% of your benefits.

These base and second-tier amounts are set in statute and have not been adjusted for inflation since the 1980s and 1990s, so the same figures apply year after year unless Congress changes the law.

Every number below was computed in code from the worksheet rules above.

The first case matches the standard textbook example: half of $20,000 is $10,000, plus $30,000 of other income gives $40,000 of provisional income, and the worksheet returns $9,600 taxable.

Provisional income is the figure the thresholds test. The IRS and the Social Security Administration define it the same way: your adjusted gross income without Social Security, plus tax-exempt interest, plus half of your net benefits.

Because tax-exempt interest is added back, municipal bonds can still push more of your benefits into tax even though the interest itself is not taxed. Income from self-employment flows in through your AGI; see the self-employment tax calculator for how that figure is built.

Your Other Income

Every extra dollar of ordinary income raises provisional income dollar for dollar. In the 50% and 85% zones this can make an extra $1,000 of withdrawals add $850 to taxable income, a reason retirees watch the order of withdrawals.

Filing Status

Married filing jointly uses higher thresholds ($32,000 and $44,000) but combines both spouses income. Married filing separately while living together removes the base amount entirely, so benefits are taxed from the first dollar.

Tax-Exempt Interest

Municipal bond interest is tax-free on its own, yet it counts in provisional income, so it can raise the taxable share of your benefits.

Lump-Sum Election

If you received a back payment covering earlier years, Publication 915 has a lump-sum election that can lower the tax. This tool uses the regular method; check Pub 915 for the election worksheets.

The 85% Ceiling

No matter how high your income climbs, the worksheet never taxes more than 85% of your benefits. Once you hit the ceiling, extra income does not increase the taxed share of Social Security.

A common myth in 2025 is that federal tax on Social Security was eliminated. It was not. The One Big Beautiful Bill Act (Public Law 119-21) left the Internal Revenue Code section 86 worksheet on this page fully in force. Up to 85% of benefits can still be taxable.

The senior deduction is a genuine benefit, but it is a separate deduction against overall income. It does not change the Social Security Benefits Worksheet and it is not a repeal of the tax. Because it is temporary, it is scheduled to end after 2028 unless extended. This calculator models only the worksheet, not the senior deduction.

Planning Retirement Withdrawals

Before you take an IRA or 401(k) distribution, test how it moves your provisional income across the $25,000, $32,000, $34,000 or $44,000 lines, and how much more of your benefits becomes taxable. To see the bigger picture of your assets, try the net worth calculator.

Deciding on Roth Conversions

A Roth conversion raises income now but later Roth withdrawals do not count toward provisional income. Model both years to see the effect on your benefits.

Estimating Withholding or Quarterly Taxes

Use the taxable portion to set Form W-4V withholding or estimated payments so you are not surprised at filing. Pair it with the take-home pay guide for the full picture.

1. Thinking 85% Is a Tax Rate

85% is the most of your benefit that can be added to taxable income, not the rate. The added amount is taxed at your ordinary bracket.

2. Forgetting Half of Benefits in the Test

Provisional income includes half of your Social Security. Leaving it out understates how much is taxable.

3. Ignoring Tax-Exempt Interest

Municipal bond interest is added back for this test even though it is tax-free, so it can raise your taxable benefits.

4. Using Gross Benefits Minus Medicare

Start from box 5 of the SSA-1099, the net benefit, before subtracting Medicare premiums.

5. Assuming the 2025 Law Ended the Tax

It did not. The worksheet still applies. The new senior deduction is a separate, temporary break.

6. Married Filing Separately Surprises

If you file separately and lived with your spouse, your base amount is $0 and up to 85% is taxed from the first dollar.

The calculator reproduces the IRS Social Security Benefits Worksheet exactly for the regular method. It does not replace that worksheet or the Form 1040 instructions.

Between 0% and 85%, depending on your provisional income: your other income, plus tax-exempt interest, plus half of your benefits. Below $25,000 single or $32,000 joint, none is taxed. The most that is ever taxable is 85% of your benefits.

It is your adjusted gross income without Social Security, plus any tax-exempt interest, plus half of your net Social Security benefits. The IRS and the Social Security Administration use this figure to decide how much of your benefits is taxed.

For single, head of household and qualifying surviving spouse filers, the base is $25,000 and the second threshold is $34,000. For married filing jointly, they are $32,000 and $44,000. These statutory amounts are not adjusted for inflation.

No. 85% is the most of your benefit that can be added to your taxable income. That added amount is then taxed at your ordinary income tax rate, not at 85%.

No. The One Big Beautiful Bill Act did not repeal the tax on Social Security. The benefits worksheet still applies. The law added a separate, temporary senior deduction of $6,000 per person age 65+ for 2025 through 2028, which lowers overall taxable income.

If you lived with your spouse at any time during the year, your base amount is $0, so up to 85% of your benefits is taxable from the first dollar. If you lived apart for the entire year, you use the $25,000 base, the same as a single filer.

No. SSI is a separate needs-based program and is not taxable, and it does not count in provisional income. This calculator is for Social Security retirement, survivor and disability benefits reported on an SSA-1099.

Yes. Even though municipal bond interest is not taxed by itself, the worksheet adds it back into provisional income, so it can increase how much of your Social Security becomes taxable.

Your total benefits go on Form 1040 line 6a, and the taxable portion from the worksheet goes on line 6b. The taxable portion is what is added to your other income.

Most states do not tax Social Security, but a few do, often with their own thresholds. This calculator covers federal tax only. Check your state rules separately.

No. The calculation runs in your browser and nothing is sent to our servers. Anything you choose to Save stays in this browser only.

• Publication 915 (2025), Social Security and Equivalent Railroad Retirement Benefits (IRS, for 2025 returns; IRC section 86 base amounts are statutory and not indexed; read 2026-10-04).
• Publication 915 PDF, Worksheet 1: Figuring Your Taxable Benefits (IRS, 2025, read 2026-10-04).
• Form 1040 instructions, Social Security Benefits Worksheet (IRS, 2025 instructions, read 2026-10-04).
• SSA Benefits Planner: Income Taxes on Your Social Security Benefits (Social Security Administration, thresholds $25,000 / $34,000 / $32,000 / $44,000, read 2026-10-04).
• One Big Beautiful Bill Act: tax deductions for working Americans and seniors (IRS, separate senior deduction, effective 2025 through 2028, read 2026-10-04).