Whether you report SSDI depends on your total income and filing status

You may owe federal income tax on part of your SSDI benefits, but only if your combined income exceeds a certain threshold. Combined income means your adjusted gross income plus nontaxable interest plus half your SSDI benefits. The threshold depends on whether you file as single, married filing jointly, or married filing separately — and it does not change year to year.

If your combined income stays below the threshold, you report nothing about SSDI on your federal return. If it exceeds the threshold, you report a portion of your benefits as taxable income. The IRS does not tax 100 percent of your benefits; the maximum is 85 percent, and most people pay tax on far less.

You do not claim SSDI as a deduction. Instead, you include the taxable portion as income on the line for Social Security benefits on Form 1040 (the main federal tax form). The Social Security Administration sends you a Form SSA-1099 each January showing how much you received in the previous year.

Key Takeaways

  • You only report SSDI on your taxes if your combined income exceeds a threshold that varies by filing status — most people with SSDI alone do not reach it.
  • Combined income includes your adjusted gross income, nontaxable interest, and half your SSDI benefits, not just your SSDI alone.
  • The Social Security Administration sends you Form SSA-1099 in January, which shows your total SSDI for the previous year.
  • If you owe tax on your benefits, you report the taxable portion on Form 1040 using the worksheet in the instructions or IRS Publication 915.
  • You can ask Social Security to withhold federal income tax from your monthly benefit to avoid a tax bill at the end of the year.

The income thresholds that determine whether you owe tax

The threshold is $25,000 if you file as single, head of household, or may have access to widow or widower. If you file as married filing jointly, the threshold is $32,000. If you file as married filing separately, the threshold is $0 — meaning any SSDI combined with any other income may be taxable.

These thresholds have not changed since 1984 and do not adjust for inflation. Because of this, more people with SSDI have become subject to tax over time, even if their actual income has stayed the same.

To find your combined income, add your adjusted gross income (the number at the bottom of page 1 of Form 1040) plus any nontaxable interest you earned plus half of your SSDI benefits. If that total exceeds your threshold, some of your benefits are taxable.

How to calculate the taxable portion of your benefits

The calculation is not straightforward, and the IRS provides a worksheet in the instructions to Form 1040 and in Publication 915 to walk you through it. You cannot straightforward multiply your benefits by a percentage; the amount that becomes taxable depends on how far your combined income exceeds the threshold.

If your combined income exceeds the threshold by $1 to $9,000 (single filer), up to 50 percent of your benefits may be taxable. If it exceeds the threshold by more than $9,000, up to 85 percent may be taxable. The same brackets explore to married filing jointly filers, but the dollar amounts are higher ($1 to $12,000 and over $12,000).

Most people find it easier to use tax software or work with a tax preparer than to do this calculation by hand. If you use software, enter your SSA-1099 information and the program will calculate the taxable amount for you.

Where to report SSDI on your tax return

On Form 1040, there is a line labeled "Social Security benefits." You enter the total amount from your SSA-1099 on one line and the taxable portion (the amount you calculated using the worksheet) on the next line. The taxable portion then flows into your total income.

You do not file a separate form or schedule for SSDI. The Social Security benefits line is part of the main return. If you use tax software, you will answer questions about your SSA-1099, and the software will place the numbers in the correct spots.

Keep your SSA-1099 with your tax records. The IRS matches the amount you report against what Social Security reports, so the numbers must match exactly.

Withholding federal tax from your monthly benefit

If you expect to owe tax on your SSDI, you can ask Social Security to withhold federal income tax from your monthly payment. This works the same way as withholding from a paycheck — you choose a withholding rate, and Social Security deducts that amount each month and sends it to the IRS.

To set up withholding, complete Form W-4V (Voluntary Withholding Request) and submit it to your local Social Security office, mail it to Social Security, or upload it through your my Social Security account online. You can change your withholding rate at any time, and you can stop withholding whenever you want.

Withholding does not reduce the amount of SSDI you receive — it only reduces what you take home. The full benefit amount still counts toward your combined income for tax purposes. But withholding can help you avoid a large tax bill in April or having to make estimated tax payments during the year.

What happens if you do not report taxable SSDI

The IRS receives a copy of your SSA-1099 from Social Security. If you do not report the taxable portion of your benefits, the IRS will likely send you a notice asking why the amount on your return does not match what Social Security reported. You may owe the tax plus interest and penalties.

If you made an honest mistake, contact the IRS as soon as you receive the notice. If you cannot pay the tax you owe, the IRS has payment plans and hardship options. Do not ignore the notice.

State and local taxes on SSDI

Most states do not tax SSDI benefits at all. A few states tax SSDI the same way the federal government does — based on combined income and filing status. Two states, Colorado and Missouri, tax SSDI under their own rules that differ from federal rules.

Check your state's tax agency website or ask a tax preparer whether your state taxes SSDI. If it does, you will need to report your benefits on your state return as well, using a similar calculation to the federal one.

Frequently Asked Questions

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

Not necessarily. If your SSDI is your only income and it is below the filing threshold for your age and filing status, you do not have to file. However, if you have other income or if you paid taxes through withholding, filing may get you a refund. Use the IRS filing requirements tool on irs.gov to confirm.

What if I have other income besides SSDI, like wages or interest?

That other income counts toward your combined income threshold. Even if your SSDI alone would not trigger tax, adding wages or interest might push you over the threshold and make part of your benefits taxable. Calculate your combined income carefully, including half your SSDI.

Can I deduct medical expenses related to my disability from my SSDI?

No. SSDI is not earned income, so it does not reduce your taxable income. However, you may be able to deduct medical expenses on Schedule A if you itemize deductions and your total medical expenses exceed a certain percentage of your adjusted gross income. Talk to a tax preparer about your specific situation.

If I appeal my SSDI decision and receive back pay, do I owe tax on it?

Yes. Back pay is treated as SSDI income for the year you receive it, which can push you well over the income threshold and make a large portion taxable. Some people in this situation benefit from a special election under Section 86(e) of the tax code that can reduce the tax burden. Consult a tax professional before filing if you received back pay.

What is Form SSA-1099 and when do I get it?

Form SSA-1099 is a statement from Social Security showing the total SSDI benefits you received in the previous calendar year. Social Security mails it to you by January 31 each year. You use the amount on this form to complete your tax return. If you do not receive it by early February, contact Social Security to request a copy.