How the IRS counts your SSDI in your tax return

Whether you owe federal income tax on your Social Security Disability Insurance (SSDI) payments depends on your combined income—not just what you receive from Social Security. The IRS uses a specific formula to decide how much of your SSDI, if any, becomes taxable.

The formula starts by adding together your adjusted gross income, nontaxable interest, and half of your SSDI payments. If that total exceeds a threshold amount (which depends on your filing status), then a portion of your SSDI becomes subject to federal income tax. The threshold is $25,000 for single filers and $32,000 for married couples filing jointly. These thresholds have not changed since 1984.

The key word is combined income. If you have no other income—no wages, no interest, no pension—your SSDI alone will not be taxed, no matter how much you receive. But if you work part-time, receive a pension, or have investment income, that income can push your combined total over the threshold and trigger taxation on part of your SSDI.

Key Takeaways

  • SSDI becomes taxable only if your combined income (wages, pensions, interest, plus half your SSDI) exceeds $25,000 for single filers or $32,000 for married couples filing jointly.
  • If you have no other income besides SSDI, you will not owe federal income tax on your disability payments.
  • Up to 85 percent of your SSDI can become taxable if your combined income is very high, but most people with SSDI pay tax on a much smaller portion.
  • You must file a tax return and report your SSDI even if none of it is taxable, if your combined income exceeds the threshold for your filing status.
  • State income tax rules vary—some states tax SSDI and some do not, regardless of federal rules.

When SSDI stays completely tax-free

If your only income is SSDI, you will not owe federal income tax. The Social Security Administration sends you a form called the SSA-1099-SM each January, which reports your annual SSDI payments. You can use this form to show the IRS that your income falls below the taxable threshold.

This remains true even if you receive a large SSDI payment. A single person with $30,000 in SSDI and no other income owes no federal tax, because their combined income is $30,000—below the $25,000 threshold (the threshold uses half your SSDI in the calculation, so $30,000 SSDI counts as $15,000 in the formula, plus $0 other income = $15,000 combined, which is under $25,000).

However, you may still need to file a tax return for other reasons—for example, to claim the Earned Income Tax Credit or to report income from work. Check the IRS filing requirements for your age and income level each year.

How other income triggers taxation on your SSDI

The moment you have income from another source, the calculation changes. Suppose you are single and receive $20,000 in SSDI and $10,000 in wages from part-time work. Your combined income is $10,000 (wages) plus $10,000 (half of $20,000 SSDI) = $20,000. This is still below the $25,000 threshold, so none of your SSDI is taxed.

Now suppose you receive $20,000 in SSDI and $15,000 in wages. Your combined income is $15,000 (wages) plus $10,000 (half of SSDI) = $25,000. You have now hit the threshold exactly. The IRS will tax up to 50 percent of the amount by which you exceed the threshold. In this case, you exceed it by $0, so no tax is owed.

But if you receive $20,000 in SSDI and $16,000 in wages, your combined income is $26,000—$1,000 over the threshold. The IRS taxes the lesser of (a) 50 percent of the excess ($500) or (b) 50 percent of your SSDI ($10,000). You would owe tax on $500 of your SSDI.

Other income that counts toward the threshold includes pensions, interest, dividends, rental income, and self-employment income. It does not include Supplemental Security Income (SSI), which is a separate program, or certain nontaxable benefits like workers' compensation.

The two-tier tax formula for higher incomes

If your combined income is very high, a second tier of taxation kicks in. Once your combined income exceeds $34,000 for single filers or $44,000 for married couples filing jointly, up to 85 percent of your SSDI can become taxable instead of just 50 percent.

This second tier is rarely reached by people receiving only SSDI. It applies mainly to people who have substantial other income—for example, a pension of $50,000 per year plus SSDI. The IRS calculates the tax in two steps: first, it taxes up to 50 percent of SSDI using the first threshold; then, it taxes up to an additional 35 percent of SSDI using the second threshold.

The result is that no more than 85 percent of your total SSDI can ever be subject to federal income tax. Even if your combined income is extremely high, 15 percent of your SSDI remains tax-free.

State income tax on SSDI

Federal income tax is only part of the picture. Thirteen states tax Social Security benefits, including SSDI, under their own rules. These states are Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia. (Illinois and Maryland exempt SSDI but tax regular Social Security retirement benefits.)

Each state uses its own income thresholds and formulas, which may differ from the federal rules. Some states follow the federal combined-income approach; others use different calculations. If you live in one of these states, you may owe state income tax on SSDI even if the federal government does not tax it, or vice versa.

Check your state's tax authority website or contact them directly to learn the rules for your state. Your state tax return instructions usually explain how to report SSDI.

What to report on your tax return

The Social Security Administration sends you a Form SSA-1099-SM by January 31 each year. This form shows your total SSDI payments for the previous year. You use this form to report your SSDI on your federal tax return.

If you file Form 1040 or 1040-SR (the standard federal income tax forms), you report your SSDI on line 5b. You also report any other income you received—wages on line 1a, interest on line 2b, and so on. The IRS uses this information to calculate whether any of your SSDI is taxable.

If you use tax software or work with a tax preparer, you will enter your SSA-1099-SM information when prompted. The software or preparer will calculate the taxable portion automatically using the combined-income formula.

Even if none of your SSDI is taxable, you must still file a return if your combined income exceeds the filing threshold for your age and filing status. The IRS requires this so they can verify that you do not owe tax.

Planning ahead if you work or have other income

If you receive SSDI and are considering work or expect to receive a pension or inheritance, it helps to understand how that income will affect your tax situation. A rough estimate: each dollar of other income you receive will eventually cause about 50 cents of SSDI to become taxable (until you hit the second threshold).

This does not mean you should avoid work or other income. SSDI itself is not reduced if you earn money (though there are work incentive rules that explore to younger beneficiaries). But it does mean your total tax bill may increase when you add other income, because both the new income and part of your SSDI become subject to tax.

If you are close to the threshold and expect a large one-time payment—such as a bonus, inheritance, or sale of property—consider whether you can spread that income across two tax years if possible. Timing can reduce the amount of SSDI that becomes taxable.

Frequently Asked Questions

Do I have to file a tax return if I only receive SSDI?

Only if your combined income exceeds the threshold for your filing status ($25,000 for single filers). If you receive only SSDI and no other income, you do not have to file. However, if you have any other income—even a small amount—check the IRS filing requirements for your age and filing status.

What if I disagree with the amount of SSDI shown on my SSA-1099-SM?

Contact the Social Security Administration directly. You can call 1-800-772-1213 or visit your local Social Security office. Do not file your tax return until the form is corrected, because the IRS will use the SSA-1099-SM to verify your reported income.

Can I reduce the amount of SSDI that gets taxed?

You cannot reduce your SSDI payments themselves, but you can manage other income. If you are close to the threshold, timing large one-time payments across two years, or reducing investment income, may lower the taxable portion of your SSDI. A tax professional can help you plan.

Does working part-time while on SSDI affect my benefits?

SSDI itself is not reduced based on work income (unlike SSI). However, if you earn enough to be considered "substantial gainful activity," Social Security may determine you are no longer disabled and stop your benefits. The earnings threshold changes yearly; for 2024 it is $1,550 per month. Work incentive programs may allow you to earn more without losing benefits.

What if I live in a state that taxes SSDI?

You will owe state income tax on the portion of SSDI that your state considers taxable, even if the federal government does not tax it. Your state's tax return will have its own instructions for reporting SSDI. Some states offer deductions or exemptions for SSDI that reduce the taxable amount.