The threshold depends on your filing status and other income

You must file a tax return if your combined income reaches a certain amount. For SSDI, "combined income" means your benefits plus any other money you received that year — wages, interest, pensions, or other sources. The threshold changes each year and depends on whether you file as single, married filing jointly, or another status.

For 2023, a single person with no other income needed to file only if their combined income exceeded $13,850. For married couples filing jointly, the threshold was $27,700. These numbers increase slightly each year. However, if you have any earned income (wages from work), the threshold is much lower — often around $1,150 regardless of your SSDI amount.

The IRS publishes updated thresholds each January for the previous tax year. You can find them on IRS.gov, or call the IRS at 1-800-829-1040 to confirm the current year's threshold for your situation.

Key Takeaways

  • You must file taxes if your combined income (SSDI plus all other income) exceeds the threshold for your filing status, which changes yearly.
  • If you earn any wages from work, the filing threshold is much lower than if you live on SSDI alone.
  • Combined income includes SSDI benefits, wages, interest, pensions, rental income, and other money received during the year.
  • The IRS updates thresholds each January; check IRS.gov or call 1-800-829-1040 to confirm the current year's requirement for your situation.
  • Filing even when not required can sometimes result in a refund if taxes were withheld from other income sources.

How SSDI counts toward your combined income

Up to 85 percent of your SSDI benefits may be taxable, depending on your combined income level. This does not mean the IRS takes 85 percent of your check — it means that amount counts toward the threshold that determines whether you file at all.

The calculation works in tiers. If your combined income is below a certain "base amount" (usually $25,000 for single filers), none of your SSDI is taxable. Once you cross that line, up to 50 percent of your benefits become taxable. If your combined income goes higher still, up to 85 percent becomes taxable. The exact amount depends on how much other income you have.

This is why someone with only SSDI and no other income almost never files taxes — their combined income stays below the base amount, so nothing is taxable. But someone with SSDI plus a part-time job may owe taxes even if their total income seems modest.

What counts as income for this calculation

Combined income includes more than just wages. The IRS counts:

  • Wages from any job or self-employment
  • Interest from bank accounts or investments
  • Dividends from stocks or mutual funds
  • Rental income from property you own
  • Pensions or retirement distributions
  • Income from a spouse if you file jointly
  • Certain other sources like alimony or gambling winnings

Nontaxable income — such as Supplemental Security Income (SSI), food stamps, or housing vouchers — does not count toward the combined income threshold. Neither do gifts or money you borrowed.

When you should file even if not required

Filing a return is optional if your income is below the threshold, but it may be worth doing anyway. If your employer withheld federal income tax from your wages, you will not get that money back unless you file. The same applies if you made estimated tax payments during the year.

You may also be may have access to to refundable tax credits — money the IRS sends you — even if you owe no tax. The Earned Income Tax Credit (EITC) is the most common. If you worked and earned less than a certain amount, you might receive hundreds of dollars back, but only if you file.

If you are unsure whether filing would help you, a free tax preparation service can review your situation. The IRS Volunteer Income Tax information (VITA) program offers free help to people with low to moderate income. You can find a VITA site near you at IRS.gov or by calling 211.

How to find your specific filing requirement

The IRS provides a worksheet on Form 1040 instructions that walks you through the calculation for your exact situation. You can also use the IRS Interactive Tax Assistant tool on IRS.gov — you answer a series of questions about your income and filing status, and it tells you whether you must file.

If you have a representative payee (someone managing your benefits), they are responsible for knowing whether you must file. You can ask them to help you determine this, or you can contact the Social Security Administration at 1-800-772-1213 to confirm your benefit amount for the year.

What happens if you do not file when required

If the IRS determines you should have filed and did not, you may face penalties and interest on any taxes owed. The penalty starts small but grows the longer you wait. However, if you file late and are owed a refund, there is no penalty — the IRS straightforward sends you the money, though you may lose it if you wait more than three years.

If you realize you missed a year, you can still file. The IRS generally accepts returns up to three years late for refunds. If you owe taxes, filing as soon as possible limits the penalties and interest that accumulate.

Frequently Asked Questions

Do I have to file taxes if I only receive SSDI and no other income?

Almost never. If SSDI is your only income, your combined income will be below the filing threshold, and none of your benefits will be taxable. The only exception is if you also received other income — even a small amount of interest or wages — that pushed your combined income over the threshold.

What if I work part-time and receive SSDI?

You almost certainly must file. Wages count toward combined income, and the threshold for people with earned income is much lower — usually around $1,150. Your SSDI plus your wages will likely exceed this, making you required to file even if your total income seems modest.

Can I file my taxes myself, or do I need a tax professional?

You can file yourself using free software or paper forms from IRS.gov. If your situation is straightforward — SSDI plus a W-2 from one job — the process is straightforward. For more complex situations, VITA sites offer free help, or you can hire a tax professional. The cost of professional help is sometimes tax-deductible.

What if I disagree with how much of my SSDI is taxable?

The calculation is set by law and does not change based on disagreement. However, if you believe the IRS made an error in calculating your taxable amount, you can file Form 1040-X (amended return) with a detailed explanation. The IRS will review it and respond in writing.

Do I need to report my SSDI to the IRS if I do not file a return?

No. If you are not required to file, you do not need to report your SSDI separately. However, if you do file for any reason — to claim a refund or a tax credit — your SSDI must be included on your return.