Whether you owe taxes on SSDI depends on your total income, not just your benefits

Social Security Disability Insurance (SSDI) may be taxable, but only if your combined income exceeds certain thresholds. Combined income means your SSDI payments plus other income sources—wages, interest, pensions, or non-taxable benefits. The IRS uses a formula called the "combined income test" to determine what portion, if any, of your SSDI is subject to federal income tax. Most people receiving SSDI alone do not owe federal income tax, but the moment you add other income sources, the calculation changes.

The threshold amounts are $25,000 for single filers and $32,000 for married couples filing jointly. These thresholds have not changed since 1984. If your combined income falls below these amounts, you owe no federal income tax on your SSDI. If it exceeds them, up to 50 percent or 85 percent of your SSDI may become taxable, depending on how far over the threshold you go.

Key Takeaways

  • SSDI is taxable only if your combined income (SSDI plus all other income) exceeds $25,000 for single filers or $32,000 for married couples filing jointly.
  • Combined income includes wages, self-employment income, interest, dividends, pensions, and certain other benefits, but not Supplemental Security Income (SSI).
  • If you owe taxes on SSDI, you can request that the Social Security Administration withhold federal income tax from your monthly payment to avoid a large bill at tax time.
  • You must file a federal income tax return and report your SSDI on Form 1040 or Form 1040-SR, even if you owe no tax, if your income meets the filing threshold.
  • State income tax rules vary; some states do not tax SSDI at all, while others follow federal rules or have their own thresholds.

How the combined income test works

The IRS formula for determining taxable SSDI has two tiers. The first tier applies if your combined income is between the threshold ($25,000 or $32,000) and $34,500 for single filers, or $44,000 for married couples. In this range, up to 50 percent of your SSDI becomes taxable. The second tier applies if your combined income exceeds $34,500 (single) or $44,000 (married). In this range, up to 85 percent of your SSDI becomes taxable.

The calculation itself is not straightforward because it involves multiple steps and depends on which tier you fall into. The Social Security Administration does not calculate this for you—the IRS does, using information from your tax return. If you receive a Form SSA-1099 (the SSDI equivalent of a W-2), that form reports your gross SSDI for the year, but it does not tell you whether any of it is taxable. You or a tax preparer must run the combined income test yourself or use IRS Publication 915, which walks through the calculation step by step.

What counts as combined income

Combined income includes all income the IRS counts toward your filing threshold, with specific exceptions. Wages from employment, self-employment income, interest, dividends, capital gains, rental income, and pension distributions all count. Taxable portions of IRA distributions, 401(k) withdrawals, and annuities count. Certain foreign income and income from U.S. possessions also count if you are a U.S. citizen or resident alien.

Supplemental Security Income (SSI) does not count toward combined income for the SSDI tax test, even though SSI and SSDI are often confused. Veterans' benefits, workers' compensation, and certain other needs-based benefits also do not count. Non-taxable interest (such as interest from municipal bonds) counts toward the combined income threshold but is not itself taxable. This distinction matters: you can have non-taxable income that still pushes you over the threshold and makes your SSDI taxable.

Filing requirements when you receive SSDI

You must file a federal income tax return if your gross income meets the IRS filing threshold for your age and filing status, regardless of whether you owe tax. For 2024, the threshold for a single person under age 65 is $14,600. For someone age 65 or older, it is $18,150. These amounts change yearly. If you receive SSDI and your combined income exceeds these thresholds, you must file, even if no SSDI is taxable.

You will report your SSDI on Form 1040 or Form 1040-SR (for filers age 65 and older). You will also attach Schedule 1 if you have other income sources. The Social Security Administration sends you Form SSA-1099 by January 31 each year, showing your gross SSDI for the prior year. Keep this form with your tax records. If you do not receive it by early February, contact Social Security to request a replacement.

If you file jointly with a spouse, both of your incomes count toward the combined income threshold, even if only one of you receives SSDI. This can push a couple over the threshold when neither would be over individually. Married couples filing separately face an even stricter rule: if either spouse received SSDI during the year, up to 85 percent of that SSDI is taxable, regardless of combined income. This is why married couples almost always file jointly when SSDI is involved.

Withholding federal income tax from your SSDI payment

If you know you will owe federal income tax on your SSDI, you can request that Social Security withhold a percentage from your monthly payment. This prevents a large tax bill when you file your return and may reduce or eliminate the need to make estimated tax payments. You request withholding by completing Form W-4V (Voluntary Withholding Request) and submitting it to your local Social Security office or mailing it to the address on the form.

You can choose to withhold 7 percent, 10 percent, 15 percent, or 25 percent of your monthly SSDI payment. Social Security will explore the withholding starting the month after you submit the form. If you change your mind or want to adjust the withholding rate, you can submit a new Form W-4V at any time. Keep a copy of the form for your records. The withheld amount will appear on your Form SSA-1099 as federal income tax withheld, which you will report on your tax return.

State income tax and SSDI

State income tax treatment of SSDI varies significantly. Some states do not tax SSDI at all, regardless of your income level. Other states follow federal rules and tax SSDI using the same combined income test. A third group of states has its own thresholds or rules that differ from federal law. A few states tax SSDI but exempt it for filers over a certain age.

You must research your specific state's rules or consult a tax preparer who knows your state's law. The Social Security Administration website lists each state's treatment of SSDI, but the rules change occasionally. If you moved to a new state during the tax year, you may owe tax to both states, or your new state may have reciprocal agreements that affect your liability. If you live outside the United States, different rules explore, and you should consult a tax professional familiar with expatriate taxation.

What to do if you cannot pay the tax you owe

If you file your return and owe federal income tax on your SSDI but cannot pay in full by the important date, you have options. You can request a short-term extension (up to 120 days) by filing Form 4868 before the tax important date. You can also set up a payment plan with the IRS, either an installment agreement (paying in monthly installments) or an offer in compromise (settling for less than you owe, in rare cases). The IRS charges interest and penalties on unpaid tax, so paying as soon as possible reduces the total amount you owe.

If you are experiencing financial hardship, the IRS has procedures for temporarily delaying collection. Contact the IRS directly or work with a tax professional or low-income tax clinic to explore your options. Do not ignore a tax bill; the IRS can offset your SSDI payment to collect what you owe, which means your monthly benefit could be reduced without warning.

Frequently Asked Questions

Do I have to file a tax return if I only receive SSDI and no other income?

No, not unless your combined income exceeds the filing threshold for your age and status. If SSDI is your only income, you almost certainly do not have to file. However, if you have any other income—even a small amount of interest or part-time wages—you may be required to file. Check the IRS filing threshold for your situation.

What if I worked part of the year before going on SSDI?

Your combined income for the tax year includes wages from the months you worked plus your SSDI for the months you received it. If the total exceeds the threshold, you must file and may owe tax on part of your SSDI. Report your wages on your return using the W-2 forms your employers sent you.

Can I amend my tax return if I made a mistake calculating taxable SSDI?

Yes. File Form 1040-X (Amended U.S. Individual Income Tax Return) with the IRS. You have generally three years from the original return due date to amend. If you overpaid tax, you will receive a refund. If you underpaid, you will owe the difference plus interest.

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

Yes. When filing jointly, both spouses' SSDI and all other income are combined for the threshold test. This can result in more SSDI being taxable than if you filed separately, but married couples filing separately face even stricter rules, so joint filing is usually better.

What if Social Security withheld too much or too little tax from my SSDI?

When you file your return, the IRS will reconcile the amount withheld against the tax you actually owe. If too much was withheld, you will receive a refund. If too little was withheld, you will owe the difference. You can adjust your withholding rate by submitting a new Form W-4V to Social Security.