The short answer: most people on SSDI don't pay federal income tax on their benefits, but some do

Whether you owe federal income tax on your SSDI benefits depends on how much other income you have. If SSDI is your only income, you almost certainly won't owe tax. If you have other income—from work, pensions, interest, or investments—you may have to include part of your SSDI in your taxable income. The IRS uses a formula based on your "combined income," which includes half of your SSDI plus all your other income.

The threshold where SSDI becomes taxable is low. For 2024, if you're single and your combined income exceeds $25,000, you may owe tax on up to 50 percent of your benefits. If you're married filing jointly, the threshold is $32,000. These numbers have not changed since 1984, which is why many people who thought they wouldn't owe tax suddenly find they do.

State income tax is separate. Some states tax SSDI; most don't. You'll need to check your state's rules, because federal and state rules don't always match.

Key Takeaways

  • If SSDI is your only income, you will not owe federal income tax on it, no matter how much you receive.
  • If you have other income, the IRS counts half your SSDI plus all other income to decide whether you cross the taxable threshold ($25,000 for single filers, $32,000 for married filing jointly in 2024).
  • Up to 85 percent of your SSDI can become taxable if your combined income is high enough, though 50 percent is the more common ceiling.
  • State income tax rules for SSDI vary by state; some states don't tax SSDI at all, while others follow federal rules or have their own thresholds.
  • You report SSDI on your tax return using Form SSA-1099, which Social Security sends you each January.

How the IRS calculates whether your SSDI is taxable

The IRS uses a two-tier system. The first tier covers the first $9,000 of combined income (for single filers; $12,000 for married filing jointly). If your combined income stays below that, none of your SSDI is taxable. Once you cross it, you enter the second tier.

In the second tier, you pay tax on the lesser of two amounts: either 50 percent of your SSDI, or 50 percent of the amount by which your combined income exceeds the first-tier threshold. For most people, this means up to 50 percent of their benefits become taxable.

There's a third tier that kicks in at higher combined income levels ($34,000 for single filers, $44,000 for married filing jointly in 2024). At that point, up to 85 percent of your SSDI can become taxable. This tier is less common but matters if you have substantial other income.

Combined income in this formula means adjusted gross income plus tax-exempt interest plus half your SSDI. It's not the same as your total income, and it's not the same as what you report on your tax return. This is where people often get confused.

What counts as "other income" for this calculation

Wages from work count. So do net earnings from self-employment, pensions, annuities, capital gains, dividends, interest (including tax-exempt interest), and rental income. Supplemental Security Income (SSI) does not count—only SSDI does.

Some income sources don't count toward the combined income threshold. Gifts, inheritances, and loans don't count. Nontaxable combat pay doesn't count. Certain veterans' benefits don't count. But if you're unsure whether a specific income source counts, the safest approach is to include it and let a tax preparer or the IRS sort it out.

If you work while on SSDI, your wages are fully counted. This is one reason people on SSDI who return to work often find they suddenly owe tax on their benefits. The work income pushes their combined income over the threshold.

How to report SSDI on your tax return

Social Security sends you a Form SSA-1099 each January showing how much SSDI you received the previous year. You use this form to report your benefits on your federal tax return. The amount on the SSA-1099 is the gross amount you received, before any withholding.

You report SSDI on Form 1040 (the main federal income tax form) or Form 1040-SR if you're 65 or older. The instructions that come with the form walk you through the calculation to determine how much of your SSDI is taxable. If you use tax software, it will do this calculation for you once you enter the SSA-1099 amount.

If you don't file a return because your income is below the filing threshold, you don't need to report your SSDI. But if you have other income that requires you to file, you must include the SSDI information even if none of it ends up being taxable.

State income tax and SSDI

Thirteen states currently do not tax income at all: Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, and Wyoming have no state income tax. New Hampshire and Tennessee tax only dividends and interest, not wages or SSDI. Illinois exempts all retirement income, including SSDI.

The remaining states vary. Some follow the federal rule exactly. Others have their own thresholds or exclude SSDI entirely. A few states tax SSDI more heavily than the federal government does. You need to check your specific state's rules, because they don't always match federal rules.

If you move to a different state, your state tax situation may change. Some people on SSDI factor this into retirement planning. If you're unsure about your state's rules, your state's department of revenue website usually has a guide, or you can ask a tax preparer familiar with your state.

What happens if you owe tax on your SSDI

If you owe tax, you pay it the same way you'd pay tax on any other income: with your tax return in April, through quarterly estimated tax payments, or by having tax withheld from your SSDI check. Social Security allows you to request voluntary withholding on your benefits if you know you'll owe tax.

To set up withholding, you complete Form W-4V and send it to your local Social Security office. You can choose to have 7, 10, 12, or 22 percent of your monthly benefit withheld. This doesn't change your benefit amount—it just sets aside part of each check for taxes. Many people find this easier than paying a lump sum when they file.

If you don't withhold and don't pay estimated tax, you may owe a penalty when you file. The penalty is usually small, but it adds to what you already owe. If you think you'll owe tax, setting up withholding now is simpler than dealing with a bill and penalty later.

Frequently Asked Questions

If I work part-time while on SSDI, will my wages push me into owing tax on my benefits?

Yes, likely. Your work wages count fully toward combined income, and even modest earnings can push you over the threshold. If you earn $15,000 and receive $20,000 in SSDI, your combined income is roughly $35,000 (half your SSDI plus your wages), which exceeds the $25,000 threshold for single filers. You'd owe tax on part of your SSDI. A tax preparer can show you the exact amount before you file.

Do I have to file a tax return if SSDI is my only income?

No. If SSDI is your only income and it's below the filing threshold for your age and filing status, you don't have to file. For 2024, the threshold for a single person under 65 is $14,600. If you're 65 or older, it's $18,150. But if you have other income, you must file even if your SSDI alone wouldn't require it.

Can I claim the Earned Income Tax Credit if I'm on SSDI?

Only if you have earned income from work. SSDI itself doesn't count as earned income for the EITC. But if you work and earn wages while on SSDI, you may be able to claim the credit. The credit phases out at higher income levels, so check whether you may have access to based on your total income.

What if I disagree with the amount on my SSA-1099?

Contact Social Security directly. You can call 1-800-772-1213 or visit your local Social Security office. Bring your SSA-1099 and any records of payments you received. Social Security will review the record and issue a corrected form if there's an error. Don't file your tax return until you've resolved the discrepancy.

Does my spouse's SSDI count toward my combined income if we file jointly?

No. Each person's SSDI is calculated separately for tax purposes. Your spouse's benefits don't count toward your combined income threshold, and yours don't count toward theirs. You each report your own SSA-1099 on the joint return, and the tax is calculated separately for each of you.