The basic rule: whether you pay tax depends on your other income

Social Security Disability Insurance (SSDI) is only taxed if you have other income above a certain threshold. The IRS calls this threshold your "combined income," and it's the number that determines whether any of your benefits become taxable. If your combined income stays below the threshold, you owe no federal tax on your SSDI, even though you receive it.

Combined income means your adjusted gross income plus nontaxable interest plus half of your SSDI benefits. This is the figure the IRS uses, not your total SSDI amount. The threshold itself depends on your filing status—whether you file as single, married filing jointly, or married filing separately.

Many people with SSDI have no other income and therefore pay no tax on their benefits at all. If that describes your situation, you may not need to file a federal tax return. However, if you have wages, self-employment income, pensions, or investment income, you need to calculate your combined income to know whether SSDI becomes taxable.

Key Takeaways

  • SSDI is taxed only if your combined income (adjusted gross income plus nontaxable interest plus half your SSDI) exceeds $25,000 for single filers or $32,000 for married couples filing jointly.
  • Combined income includes wages, self-employment income, pensions, interest, dividends, and other sources—but not all income counts the same way.
  • If you exceed the threshold, you may owe tax on up to 85 percent of your SSDI benefits, depending on how far over the threshold you go.
  • You report SSDI on your federal tax return using Form 1040 and Schedule 1, and the IRS sends you a Form SSA-1099 each January showing what you received.
  • State tax rules vary widely; some states tax SSDI and some do not, regardless of what the federal government does.

The two income thresholds that determine how much SSDI gets taxed

The IRS uses two thresholds, and which one applies to you depends on how much your combined income exceeds the first one. The first threshold is $25,000 for single filers, $32,000 for married couples filing jointly, and $0 for married people filing separately. If your combined income is below these numbers, you owe no federal tax on SSDI.

If your combined income exceeds the first threshold, you move into a taxable range. The amount of SSDI that becomes taxable depends on how far over you go. The second threshold is $34,000 for single filers and $44,000 for married couples filing jointly. Between the first and second threshold, up to 50 percent of your SSDI can become taxable. Above the second threshold, up to 85 percent of your SSDI can become taxable.

This means a single person with $26,000 in combined income pays tax on a smaller portion of their SSDI than a single person with $40,000 in combined income. The exact calculation is complex, but the IRS worksheet on Form 1040 instructions walks you through it step by step. Many tax software programs also calculate this automatically if you enter your SSDI amount.

What counts as income for the combined income calculation

Combined income includes most sources of money you receive, but the way it counts varies. Wages from a job count dollar for dollar. Self-employment income counts dollar for dollar. Pensions, annuities, and distributions from retirement accounts (like 401(k)s and IRAs) count dollar for dollar. Interest and dividends count dollar for dollar. Capital gains count dollar for dollar.

Nontaxable interest—such as interest from municipal bonds—also counts toward combined income, even though you do not owe federal tax on it directly. This is one reason combined income can be higher than your taxable income. Half of your SSDI benefits also count toward combined income, which is why the threshold is relatively low compared to other income limits in the tax code.

Some income does not count. Supplemental Security Income (SSI) does not count. Veterans benefits do not count. Workers' compensation does not count. Gifts do not count. The key is whether the IRS considers it income on your tax return. If you are unsure whether a particular payment counts, the IRS Publication 915 (Social Security and Equivalent Railroad Retirement Benefits) lists the rules in detail.

How to calculate the taxable portion of your SSDI

The IRS provides a worksheet in the Form 1040 instructions that walks you through the calculation. You start by adding your adjusted gross income, nontaxable interest, and half your SSDI benefits to get combined income. Then you compare that number to the thresholds.

If combined income is $25,000 or less (single) or $32,000 or less (married filing jointly), you stop—none of your SSDI is taxable. If combined income exceeds the first threshold but not the second, you calculate 50 percent of the excess over the first threshold, then compare that to 50 percent of your SSDI benefits. Whichever is smaller is the taxable amount.

If combined income exceeds the second threshold, the calculation is more involved. You calculate 85 percent of the excess over the second threshold, add that to the amount from the first calculation, then compare the total to 85 percent of your SSDI benefits. Again, whichever is smaller is the taxable amount. A tax professional or tax software can handle this calculation, or you can work through the IRS worksheet yourself.

Reporting SSDI on your federal tax return

You report SSDI on Form 1040, the main federal income tax form. The amount goes on line 5b under "Social Security benefits." You also report it on Schedule 1 (Form 1040), which is where you list other income sources. The IRS sends you a Form SSA-1099 each January showing the total SSDI you received in the previous year—use this amount when you file.

If you are required to file a federal tax return because of other income, you must include your SSDI on the return even if none of it is taxable. If you have no other income and your SSDI is not taxable, you may not be required to file, but filing anyway can sometimes result in a refund if taxes were withheld from other sources.

The Form 1040 instructions include the worksheet for calculating taxable SSDI. If you use tax software, you enter your SSDI amount and the software calculates the taxable portion. If you work with a tax preparer, bring your Form SSA-1099 and information about any other income you received.

State income tax on SSDI varies widely

Federal tax rules explore nationwide, but state tax rules do not. Some states do not tax SSDI at all, regardless of your income level. Other states follow the federal rule and tax SSDI the same way the IRS does. A few states have their own thresholds that differ from the federal ones.

If you live in a state with an income tax, you need to know that state's rule. The best way to find out is to check your state's tax agency website or call their helpline. Many state tax forms have a line for SSDI, and the instructions explain whether it is taxable in your state. If you move to a different state, the rule may change, so it is worth checking whenever your situation changes.

Some states that do not tax SSDI include Illinois, Mississippi, and Pennsylvania. Others, like Colorado and Missouri, tax it the same way the federal government does. Still others have different rules. Because state rules change, it is best to verify the current rule for your state rather than relying on what you may have heard.

What happens if you do not report SSDI on your tax return

The IRS receives a copy of your Form SSA-1099, so they know how much SSDI you received. If you are required to file a tax return and you do not report your SSDI, the IRS will likely notice the discrepancy. This can result in the IRS sending you a notice, recalculating your taxes, and billing you for any tax owed plus penalties and interest.

Whether you are required to file depends on your total income from all sources. If your only income is SSDI and it is not taxable, you may not be required to file. But if you have wages, self-employment income, or other sources, you probably are required to file even if your SSDI is not taxable. The safest approach is to file if you have any doubt, or to contact the IRS or a tax professional to confirm whether you must file.

Frequently Asked Questions

Can I reduce my SSDI taxes by earning less income?

Yes. Because SSDI is only taxed if your combined income exceeds the threshold, earning less from wages or other sources can lower or eliminate your SSDI tax. If you are close to the threshold, even a small reduction in other income can make a difference. However, this strategy only works if you have control over your income—for example, if you are self-employed or can choose how much to work.

Does working part-time affect how much SSDI gets taxed?

Yes. Wages from part-time work count toward your combined income. If your part-time wages push your combined income over the threshold, some of your SSDI becomes taxable. The more you earn, the more SSDI becomes taxable, up to the 85 percent maximum. This is separate from the earnings limit that can reduce your SSDI payment itself if you are under full retirement age.

What if I receive both SSDI and SSI?

SSI (Supplemental Security Income) does not count toward combined income and is not taxable. Only your SSDI counts. However, most people cannot receive both programs at the same time because SSI is for people with very low income and resources, and SSDI recipients usually exceed those limits. If you do receive both, report only the SSDI on your tax return.

Do I have to file a tax return if my SSDI is not taxable?

Not necessarily. If SSDI is your only income, you are not required to file. However, if you have wages, self-employment income, or other sources, you probably are required to file even if your SSDI is not taxable. Check the IRS filing requirements based on your total income, or contact a tax professional to be sure.

Can I have taxes withheld from my SSDI to avoid a big bill at tax time?

Yes. You can request that the Social Security Administration withhold federal income tax from your SSDI payment. You do this by completing Form W-4V and submitting it to Social Security. You can choose to have 7, 10, 15, or 25 percent withheld. This can help you avoid owing a large amount when you file your tax return.