What the IRS counts as taxable SSDI income

The IRS counts part or all of your SSDI benefits as taxable income depending on how much other income you have. You do not pay tax on SSDI itself — instead, the IRS uses a formula that combines your SSDI with other income sources to decide whether you owe tax.

The formula works like this: the IRS adds half of your SSDI benefits to your other income (wages, interest, pensions, and so on). If that total exceeds a certain threshold, you must count some of your SSDI as taxable. The threshold depends on your filing status and whether you are married.

For a single filer in 2024, the first threshold is $25,000. For married filing jointly, it is $32,000. If your combined income falls below these numbers, you owe no tax on your SSDI. If it exceeds them, you may owe tax on up to 50 percent of your benefits, and in some cases up to 85 percent.

Key Takeaways

  • The IRS uses a two-tier formula: if your combined income (half your SSDI plus all other income) exceeds $25,000 (single) or $32,000 (married filing jointly), some of your SSDI becomes taxable.
  • You may owe tax on 50 percent of your benefits at the first threshold, and up to 85 percent at the second threshold, which is $34,000 for single filers and $44,000 for married filing jointly.
  • Other income includes wages, self-employment income, pensions, interest, dividends, and rental income — but not SSI (Supplemental Security Income) or certain other benefits.
  • The Social Security Administration sends Form SSA-1099 each January showing the total SSDI you received; you use this figure to calculate your taxable amount.
  • Many people with SSDI owe no federal tax because their combined income stays below the threshold, but some states tax SSDI differently.

How to calculate your taxable SSDI amount

To find out whether you owe tax on SSDI, start with Form SSA-1099, which Social Security mails to you in January. This form shows the total SSDI you received in the previous year. You will need this number to work through the IRS formula.

Add up all your other income for the year: wages from a W-2, self-employment income from a Schedule C, interest and dividends, pensions, and any other taxable income. Do not include SSI, veterans benefits, or certain other nontaxable payments. This total is your "combined income" starting point.

Now add half of your SSDI to this combined income. For example, if you received $15,000 in SSDI and had $12,000 in wages, you would add $7,500 (half of $15,000) to $12,000, giving you $19,500. If this number is below $25,000 (single) or $32,000 (married filing jointly), you owe no tax on your SSDI and you are done.

If your combined income exceeds the first threshold, the IRS worksheet on Form 1040 instructions walks you through the next step: calculating how much of your SSDI is taxable. The worksheet is built into tax software, so if you use TurboTax, H&R Block, or similar programs, the software does this calculation for you.

The two income thresholds and what they mean

The IRS uses two thresholds to determine how much of your SSDI is taxable. The first threshold is $25,000 for single filers and $32,000 for married filing jointly. The second threshold is $34,000 for single filers and $44,000 for married filing jointly. These amounts have not changed since 1984.

If your combined income (half your SSDI plus other income) falls between the first and second threshold, you may owe tax on up to 50 percent of your SSDI benefits. If it exceeds the second threshold, you may owe tax on up to 85 percent of your benefits.

Because these thresholds have not increased in 40 years, more people with SSDI are now affected by the tax rules than when they were written. Someone with modest income that seemed high in 1984 may now fall into the taxable range, even though their actual purchasing power has not changed much.

What counts as income for this calculation

The IRS counts most sources of money as income for the SSDI tax formula. Wages from a job, self-employment income, interest from a savings account, dividends from stocks, rental income, and pension payments all count. If you have a 1099 form for it, it almost certainly counts.

Some income does not count. SSI (Supplemental Security Income) does not count. Veterans benefits do not count. Workers' compensation does not count. Certain railroad retirement benefits do not count. If you receive any of these, do not add them to your combined income.

Tax-exempt interest (such as interest from municipal bonds) counts toward the threshold even though you do not owe tax on it. This is a common surprise: you can have income that is not taxable but still pushes your SSDI into the taxable range.

State taxes on SSDI

Thirteen states tax SSDI benefits: Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia. The rules vary by state. Some states follow the federal formula; others tax SSDI differently or only for higher-income residents.

If you live in one of these states, you may owe state tax on SSDI even if you owe no federal tax. You may also owe federal tax but no state tax. Check your state's tax agency website or ask a tax preparer familiar with your state's rules.

If you move to a different state during the year, you may owe tax to both states, or the rules may change depending on when you moved. This is another reason to work with a tax preparer if your situation is not straightforward.

Reporting SSDI on your tax return

You report SSDI on Form 1040, the main federal tax return form. The amount goes on the line labeled "Social Security benefits" in the income section. You do not file a separate form just for SSDI; it is part of your regular tax return.

If you use tax software, you enter the total from Form SSA-1099 and the software calculates how much is taxable using the IRS worksheet. If you work with a tax preparer or CPA, bring Form SSA-1099 along with your other income documents.

You do not need to do anything special to report SSDI. The Social Security Administration also sends a copy of Form SSA-1099 to the IRS, so the IRS knows what you received. If you do not report it correctly, the IRS will catch the mismatch.

What happens if you owe tax on SSDI

If you owe tax on SSDI, you pay it the same way you pay any other federal income tax: with your tax return in April, through quarterly estimated tax payments if you have a lot of income, or through withholding if you have wages.

You can ask Social Security to withhold federal income tax directly from your SSDI check. You do this by filling out Form W-4V and sending it to your local Social Security office. This is useful if you want to avoid a large tax bill in April, or if you do not have other income to withhold from.

If you do not withhold and do not pay estimated tax, you may owe penalties and interest when you file. The penalty is usually small if you owe a modest amount, but it adds up if you wait until April to pay a large bill.

Frequently Asked Questions

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

Not necessarily. If your SSDI is your only income and it is below the threshold ($25,000 for single filers), you do not owe federal tax and do not have to file. However, if you have other income or live in a state that taxes SSDI, you may need to file even if you owe no tax.

Does working part-time while on SSDI affect my taxes?

Yes. Wages from work count as income in the SSDI tax formula. Even a small part-time job can push your combined income over the threshold and make your SSDI taxable. You also need to watch SSDI's earnings limit if you are under full retirement age, which is separate from the tax rule.

What if I did not get a Form SSA-1099?

Call Social Security at 1-800-772-1213 and ask them to mail you a copy. You can also create a my Social Security account online and view your Form SSA-1099 there. You need this form to file your tax return accurately.

Can I deduct anything to lower my SSDI tax?

The standard deduction lowers your overall taxable income, which can help. If your combined income is close to the threshold, a larger standard deduction might keep you below it. However, you cannot deduct SSDI-specific expenses the way you can deduct medical expenses or charitable donations.

What if I think I paid too much tax on SSDI?

You can file an amended return using Form 1040-X if you made a mistake or if your income was lower than you thought. You have three years to file an amended return and get a refund. A tax preparer or the IRS can help you figure out if you overpaid.