Report SSDI only if you have other income that pushes you over the combined income threshold

Most people who receive Social Security Disability Insurance (SSDI) do not report it on their federal tax return because their SSDI alone does not trigger a tax filing requirement. However, if you have other income—wages, self-employment earnings, interest, dividends, or distributions from retirement accounts—you may owe tax on a portion of your SSDI. The IRS uses a formula based on your "combined income," which includes half of your SSDI plus all other income. If that combined income exceeds a threshold ($25,000 for single filers, $32,000 for married filing jointly), you must report the taxable portion of your SSDI on Form 1040.

The taxable portion is never more than 85 percent of your SSDI, even if your combined income is very high. This means SSDI is taxed more leniently than Social Security retirement benefits, which can have up to 85 percent of the benefit included in taxable income. The exact amount you owe depends on your total income for the year, not on the amount of SSDI you received.

Key Takeaways

  • You must report SSDI on your tax return only if your combined income (half your SSDI plus all other income) exceeds $25,000 (single) or $32,000 (married filing jointly).
  • The IRS worksheet on Form 1040 instructions or Publication 915 calculates exactly how much of your SSDI is taxable; you cannot estimate this yourself.
  • If you owe tax on SSDI, you report it on line 5b of Form 1040 under "Social Security benefits," even though SSDI is technically a different program.
  • You can request that the Social Security Administration withhold federal income tax from your SSDI payments each month to avoid owing a large amount at tax time.
  • If you file a return and do not report SSDI you should have reported, the IRS will contact you; correcting it early costs less than waiting for an audit notice.

How the IRS calculates taxable SSDI using combined income

The IRS does not tax SSDI the same way it taxes wages. Instead, it uses a two-tier system based on your combined income. Combined income is defined as your adjusted gross income (AGI) plus nontaxable interest plus half of your SSDI for the year.

If your combined income is below $25,000 (single) or $32,000 (married filing jointly), none of your SSDI is taxable. If your combined income is between $25,000 and $34,000 (single) or $32,000 and $44,000 (married filing jointly), up to 50 percent of your SSDI may be taxable. If your combined income exceeds $34,000 (single) or $44,000 (married filing jointly), up to 85 percent of your SSDI may be taxable. The exact percentage depends on how far above the threshold you are, and the IRS provides a worksheet in Publication 915 to calculate it.

Example: You receive $1,200 per month in SSDI ($14,400 per year) and earn $15,000 in wages. Your combined income is $15,000 + $7,200 (half of SSDI) = $22,200. Since $22,200 is below $25,000, you owe no federal tax on your SSDI, even though you must file a return because of your wages. If instead you earned $20,000 in wages, your combined income would be $20,000 + $7,200 = $27,200. Now you are $2,200 above the first threshold, and the IRS worksheet would calculate that roughly $1,100 of your SSDI is taxable.

Where to report SSDI on Form 1040

SSDI appears on your federal tax return in the same place as Social Security retirement benefits, even though SSDI and Social Security are different programs. On Form 1040, you report the total amount of SSDI you received during the year on line 5a, and the taxable portion (calculated using the IRS worksheet) on line 5b, labeled "Social Security benefits."

You will receive a Form SSA-1099 from the Social Security Administration in January showing the total SSDI you received in the previous year. Use this form to fill in line 5a. Do not estimate the amount. If you did not receive a Form SSA-1099 and you believe you should have, contact the Social Security Administration at 1-800-772-1213 or visit your local Social Security office.

If you use tax preparation software, the software will walk you through the combined income calculation and fill in line 5b automatically once you enter your income and SSDI amount. If you prepare your return by hand, you must use the worksheet in the Form 1040 instructions or IRS Publication 915 to calculate the taxable portion yourself. Do not leave line 5b blank if you have combined income above the threshold; the IRS will treat it as an error and may assess penalties.

Requesting federal income tax withholding from your SSDI payments

If you know you will owe tax on your SSDI because you have other income, you can ask the Social Security Administration to withhold federal income tax from your SSDI payment each month. This reduces the amount you receive but prevents you from owing a large lump sum when you file your return in April.

To request withholding, complete Form W-4V (Voluntary Withholding Request) and submit it to your local Social Security office or mail it to the address on the form. You can choose to have 7, 10, 15, or 25 percent of your SSDI withheld. The Social Security Administration will begin withholding the following month. You can change or stop withholding at any time by submitting a new Form W-4V.

Withholding is voluntary and does not change whether you owe tax; it straightforward spreads the tax payment across the year instead of requiring you to pay it all at once in April. If you withhold too much, you will receive a refund when you file. If you withhold too little, you will still owe the difference.

What happens if you do not report SSDI you should have reported

If your combined income exceeded the threshold but you did not report the taxable portion of your SSDI on your return, the IRS will eventually identify the discrepancy. The Social Security Administration reports all SSDI payments to the IRS, so the IRS knows how much you received. If you filed a return without reporting taxable SSDI, the IRS will send you a notice asking you to file an amended return or explaining the tax you owe.

The sooner you correct the error, the better. If you file an amended return (Form 1040-X) on your own before the IRS contacts you, you may avoid penalties. If the IRS contacts you first, you will owe the unpaid tax plus interest calculated from the original due date, and potentially a penalty for underpayment. The penalty is usually 20 percent of the unpaid tax, though it can be lower if you have reasonable cause for the error.

If you realize you made an error on a return you filed in a previous year, file Form 1040-X for that year as soon as possible. You have three years from the original due date to claim a refund if you overpaid, but the IRS can assess additional tax for up to ten years in some cases.

SSDI and state income tax

Most states do not tax SSDI, but a few do. Colorado, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont tax SSDI the same way the federal government does—using a combined income threshold and a formula to determine the taxable portion. If you live in one of these states and your combined income exceeds the state threshold, you must report taxable SSDI on your state return as well.

State thresholds and formulas vary. Some states use the same combined income thresholds as the federal government ($25,000 single, $32,000 married); others use different amounts. Check your state's tax agency website or contact them directly to learn whether you owe state tax on your SSDI. If you do, your state tax return instructions will include a worksheet similar to the federal one.

If you live in a state that does not tax SSDI, you do not report it on your state return, even if you reported it on your federal return. The two are separate calculations.

Frequently Asked Questions

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

No. If SSDI is your only income and your combined income is below the threshold, you have no federal tax filing requirement. However, if you have other income (wages, self-employment, interest, or retirement distributions), you must file a return even if you owe no tax on your SSDI, because that other income may require you to file.

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

Yes. If you file a joint return, the combined income threshold is $32,000, and it includes your spouse's income, your SSDI, and any other household income. Even if your spouse has no SSDI, their income counts toward determining whether your SSDI is taxable.

What if I received SSDI for only part of the year?

Report only the SSDI you actually received. Your Form SSA-1099 will show the exact amount. If you started or stopped receiving SSDI mid-year, the form will reflect that. Use the actual amount on your return, not an annualized estimate.

Can I deduct medical expenses or work-related costs from my SSDI?

No. SSDI is not earned income, so you cannot deduct work expenses or claim the earned income tax credit based on SSDI. You can deduct medical expenses only if you itemize deductions and your total medical expenses exceed 7.5 percent of your adjusted gross income, but this deduction applies to all medical expenses, not just those related to your disability.

If I owe tax on SSDI, can I set up a payment plan with the IRS?

Yes. If you cannot pay the full amount when you file, you can request a payment plan (called an installment agreement) from the IRS. You can explore online at IRS.gov, by phone at 1-800-829-1040, or by mail. The IRS charges a setup fee and interest on the unpaid balance, but a payment plan prevents the IRS from taking enforcement action while you pay.