The form you file depends on whether your SSDI is taxable

Not all SSDI is taxable, and the form you use depends on your total income for the year. If SSDI is your only income and it stays below a certain threshold, you may not file a federal return at all. If you have other income—wages, interest, self-employment earnings—or if your SSDI pushes you over the threshold, you file the same forms as anyone else: Form 1040 (the standard individual income tax return) and any schedules that match your income sources.

The IRS does not have a special SSDI-only form. What changes is whether you include SSDI in your taxable income calculation, and that depends on a formula called combined income. Combined income is half your SSDI plus all your other income (wages, interest, pensions, and so on). If combined income exceeds certain thresholds—$25,000 for single filers, $32,000 for married filing jointly—some or all of your SSDI becomes taxable.

The Social Security Administration sends you a Form SSA-1099 each January showing how much SSDI you received in the previous year. You use that number to calculate combined income and determine whether you owe tax. You do not file the SSA-1099 with the IRS; it is for your records and your own calculation.

Key Takeaways

  • You file Form 1040 (the standard tax return) if you have SSDI income that is taxable or if you have other income sources, regardless of SSDI.
  • The Social Security Administration sends Form SSA-1099 in January, which shows your total SSDI for the year but is not filed with the IRS.
  • Whether SSDI is taxable depends on combined income (half your SSDI plus all other income), not on SSDI alone.
  • If SSDI is your only income and combined income is below the threshold for your filing status, you typically do not file a federal return.
  • State tax rules vary; some states do not tax SSDI at all, while others follow federal rules or have different thresholds.

How to calculate combined income and determine if you file

Combined income is the starting point for the IRS taxability test. Take half of your SSDI for the year (from Form SSA-1099), add all your other income (W-2 wages, 1099 interest, 1099 dividends, self-employment income, pensions, and so on), and that total is your combined income.

Next, compare combined income to the threshold for your filing status. For single filers, the threshold is $25,000. For married filing jointly, it is $32,000. For married filing separately, it is $0 (meaning any combined income makes SSDI taxable). If your combined income is below the threshold, none of your SSDI is taxable. If it exceeds the threshold, up to 85 percent of the excess can be taxable, though the actual percentage depends on how far above the threshold you are.

Example: You are single and received $15,000 in SSDI and $12,000 in wages. Combined income is ($15,000 ÷ 2) + $12,000 = $19,500. Since $19,500 is below $25,000, none of your SSDI is taxable. You report only the $12,000 in wages on Form 1040.

Another example: You are single and received $15,000 in SSDI and $15,000 in wages. Combined income is ($15,000 ÷ 2) + $15,000 = $22,500. Still below $25,000, so none of your SSDI is taxable.

A third example: You are single and received $15,000 in SSDI and $20,000 in wages. Combined income is ($15,000 ÷ 2) + $20,000 = $27,500. This exceeds $25,000 by $2,500. Up to 50 percent of the excess ($1,250) is taxable, plus up to 85 percent of any amount above $34,000 (which does not explore here). So $1,250 of your SSDI is taxable.

Form 1040 and which schedules to attach

Form 1040 is the main federal income tax return. You report your total income, subtract deductions, and calculate tax owed or refund due. If any of your SSDI is taxable, you report it on line 5b of Form 1040 (labeled "Social Security benefits").

Which schedules you attach depends on your other income sources. If you have W-2 wages from an employer, you report them on line 1a (wages are already on your W-2, which your employer sends to the IRS). If you have interest or dividends, you may need Schedule B. If you are self-employed, you file Schedule C (or Schedule C-EZ if your business is straightforward) and then Schedule SE to calculate self-employment tax. If you have rental income, you file Schedule E. If you have capital gains or losses, you file Schedule D.

The IRS provides a worksheet with Form 1040 instructions to calculate taxable SSDI. You do not file this worksheet with your return; it is a tool to arrive at the number you enter on line 5b. Many people use tax software (TurboTax, H&R Block, FreeTaxUSA) or a tax preparer to do this calculation, since the formula is complex and straightforward to get wrong by hand.

Form SSA-1099 and what it shows

In January, the Social Security Administration mails Form SSA-1099 to every person who received SSDI in the previous calendar year. The form shows your total SSDI benefit for that year in box 5. If you received benefits for only part of the year (for example, you started SSDI in June), the form shows only the months you received.

Form SSA-1099 is not filed with the IRS. It is for your records. You use the number in box 5 to calculate combined income and determine whether any SSDI is taxable. If you file a return, you keep the SSA-1099 with your tax records in case the IRS asks questions later.

If you did not receive an SSA-1099 by early February, contact the Social Security Administration at 1-800-772-1213 or visit your local Social Security office. You will need the form to file an accurate return, or at minimum to know your SSDI total for the year.

State income tax and SSDI

Federal tax rules do not automatically explore to state income tax. Some states do not tax SSDI at all, regardless of combined income. Others follow federal rules exactly. Still others have different thresholds or exclude SSDI entirely for residents over a certain age.

If you live in a state with income tax, check your state's tax agency website or call their helpline to learn the rule for SSDI. States that do not tax SSDI include Illinois, Mississippi, and Pennsylvania. States that follow federal rules include California, New York, and Virginia. Some states, like Colorado, exclude SSDI for filers over 55. The rule can change, so verify before you file.

If you file a federal return and SSDI is taxable under federal rules, you may still not owe state tax if your state excludes SSDI. Conversely, if your state taxes SSDI but federal rules do not, you may owe state tax but not federal tax. File both returns if you are required to file in your state, even if only one results in tax owed.

When you do not have to file a federal return

If SSDI is your only income and combined income is below the threshold for your filing status, you are not required to file a federal return. For a single person with only SSDI, that means combined income below $25,000 (which, since combined income is half SSDI plus other income, means SSDI below $50,000 with no other income). For married filing jointly, it is combined income below $32,000.

However, you may want to file anyway if you had taxes withheld from other income (such as wages) or if you are due a refund. SSDI itself does not have withholding unless you request it, but if you had a job part of the year, your employer may have withheld more tax than you owe. Filing a return gets you that refund.

If you are not required to file but choose to, use Form 1040 the same way as anyone else. There is no penalty for filing when you are not required to, and you may come out ahead.

Frequently Asked Questions

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

Only if your combined income (half SSDI plus all other income) exceeds the threshold for your filing status ($25,000 for single, $32,000 for married filing jointly) or if you have other income that requires a return. If SSDI is your only income and combined income is below the threshold, you do not have to file, though you may want to if you had taxes withheld elsewhere.

What if I receive both SSDI and SSI?

SSI (Supplemental Security Income) is never taxable. Only SSDI counts toward the combined income test. If you receive both, use only the SSDI amount from Form SSA-1099 in your calculation. SSI does not appear on a 1099 form.

Can I request that the Social Security Administration withhold taxes from my SSDI?

Yes. 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 request 7, 10, 15, or 25 percent withholding. This reduces the amount you owe at tax time but also reduces your monthly benefit.

What if I made a mistake on last year's return and did not report taxable SSDI?

File an amended return using Form 1040-X (Amended U.S. Individual Income Tax Return) for the year in question. You have three years from the original due date to amend. Include a brief explanation of the error and attach a corrected Form 1040 showing the taxable SSDI amount.

Do I need to report SSDI on my return if none of it is taxable?

No. If combined income is below the threshold, you do not report any SSDI on Form 1040. You only report other income (wages, interest, and so on). Keep Form SSA-1099 with your records to show the IRS how you calculated combined income if they ask.