The IRS taxes some SSDI income but not all of it, and the amount depends on your other income that year

Social Security Disability Insurance (SSDI) is not automatically taxable. Whether you owe federal income tax on your SSDI payments depends on your combined income—a calculation that includes your SSDI, wages, interest, dividends, and other money you receive. If your combined income stays below a certain threshold, you pay no tax on your SSDI. If it rises above that threshold, the IRS taxes a portion of your SSDI benefits, not necessarily all of it.

The threshold amounts are set by federal law and do not change year to year based on inflation. For 2024, if you file as single and your combined income is under $25,000, you owe no tax on your SSDI. If you file as married filing jointly, the threshold is $32,000. These numbers have been the same since 1984.

The tax applies only to the amount of SSDI that exceeds the threshold. If your combined income is $27,000 and you file single, you do not pay tax on the entire $27,000—only on the $2,000 above $25,000. Even then, the IRS taxes a maximum of 85 percent of your SSDI benefits in any single year, regardless of how high your other income climbs.

Key Takeaways

  • SSDI becomes taxable only if your combined income (SSDI plus wages, interest, and other sources) exceeds $25,000 for single filers or $32,000 for married filers in 2024.
  • The IRS taxes only the portion of SSDI above the threshold, not your entire benefit amount.
  • No more than 85 percent of your SSDI can be taxed in any year, even if your other income is very high.
  • You must file a tax return and report your SSDI to determine whether any of it is taxable, even if you normally would not file.

How the IRS calculates combined income

Combined income is not the same as your total income. The IRS starts with your adjusted gross income (AGI)—wages, self-employment income, interest, dividends, capital gains, and certain other sources. Then it adds back certain deductions and adds your nontaxable interest (such as interest from municipal bonds). Finally, it adds one-half of your SSDI benefits. That total is your combined income for the purpose of determining whether your SSDI is taxable.

This calculation matters because a small amount of other income can push you over the threshold. If you are single and receive $20,000 in SSDI but also earn $6,000 in wages, your combined income is $26,000 (the $20,000 SSDI plus the $6,000 wages plus half of the $20,000 SSDI, which is $10,000—but the IRS counts only half). You would be $1,000 over the $25,000 threshold, and some of your SSDI would be taxable.

The half-SSDI rule exists because the IRS wants to measure how much income you have beyond your basic SSDI. It is a technical calculation, but the result is that even modest wages or investment income can trigger SSDI taxation.

What portion of SSDI actually gets taxed

Once you know your combined income exceeds the threshold, the IRS does not straightforward tax all the excess. Instead, it uses a two-tier system. The first tier taxes up to 50 percent of your SSDI benefits. The second tier taxes up to an additional 35 percent. Together, these mean no more than 85 percent of your SSDI is ever taxable.

For most people, the amount taxed falls between 0 and 50 percent of their SSDI. You hit the 50 percent mark only if your combined income is significantly above the threshold. The 85 percent cap applies only to people with very high other income—typically those with substantial wages, pensions, or investment income in addition to SSDI.

The exact calculation is complex and involves multiple steps. The Social Security Administration sends you a form called the SSA-1099-SM each January, which reports your SSDI for the prior year. Your tax preparer or tax software uses this form along with your other income to calculate how much SSDI is taxable.

When you must file a tax return even if you do not owe tax

You must file a federal income tax return if your combined income exceeds the threshold for your filing status, even if no tax is actually owed. This is different from the usual rule for SSDI recipients without other income, who typically do not file.

If you have wages, self-employment income, or substantial interest and dividends, you likely must file a return. The filing requirement exists so the IRS can verify that your SSDI is correctly reported and that you have paid any tax owed. Filing also protects you: if you do not file and the IRS later determines you owed tax, you may face penalties and interest.

Some people receive SSDI and also work part-time or have retirement income. These situations almost always require filing a return. If you are unsure whether you must file, the IRS provides a worksheet on Form 1040 instructions, or you can ask a tax preparer.

State income tax on SSDI

Most states do not tax SSDI benefits at all. However, a small number of states—including Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont—tax SSDI under certain conditions. The rules vary by state.

Some states tax SSDI only if your income exceeds a higher threshold than the federal one. Others tax it at a lower rate or only for people above a certain age. A few states have eliminated their SSDI tax in recent years, so the list changes. If you live in one of these states, contact your state tax authority or a tax preparer to learn the specific rules for your situation.

Even if your state taxes SSDI, you may still owe nothing if your income is below the state threshold. State and federal tax rules do not always align, so it is possible to owe federal tax on SSDI but not state tax, or vice versa.

How to report SSDI on your tax return

You report SSDI on Form 1040, the main federal income tax return. You enter your SSDI amount on line 5b, labeled "Social Security benefits." You also complete Worksheet 1 or Worksheet 2 (depending on your filing status and whether you have other income) to calculate how much of your SSDI is taxable. The taxable portion goes on line 5b as well.

If you use tax software, the program walks you through these steps and calculates the taxable amount automatically. If you file by hand or work with a tax preparer, they will use your SSA-1099-SM and your other income documents to complete the calculation.

The key is to report your SSDI honestly and completely. The Social Security Administration reports all SSDI payments to the IRS, so the IRS knows how much you received. Failing to report it invites an audit and potential penalties.

Planning ahead if you have other income

If you receive SSDI and also have wages, self-employment income, or investment income, you may be able to reduce the amount of SSDI that becomes taxable by timing when you receive certain income. For example, if you are self-employed, you might defer invoicing or delay receiving a bonus until the following year. If you have investment income, you might time the sale of assets to spread gains across two years.

These strategies work only if you have control over when you receive the income. Wages from an employer are usually fixed, and Social Security benefits are paid on a set schedule. But if you have flexibility—such as being self-employed or managing investments—a tax preparer can help you model different scenarios to see which timing minimizes your tax burden.

Another consideration is whether you should claim certain deductions or credits. Some tax credits, such as the Earned Income Tax Credit, can reduce your tax liability if you have wages. A tax preparer can review your full situation and recommend strategies specific to your circumstances.

Frequently Asked Questions

If I receive SSDI and nothing else, do I have to file a tax return?

No. If SSDI is your only income and it is below the threshold for your filing status, you do not have to file a federal return. However, you may want to file anyway if you had taxes withheld from other income or if you are may have access to to a refundable tax credit.

Can I reduce my SSDI tax by giving money to charity?

Charitable donations reduce your adjusted gross income, which can lower your combined income and reduce SSDI taxation. However, you must itemize deductions on your tax return rather than taking the standard deduction for this to help. A tax preparer can calculate whether itemizing saves you money.

What if I disagree with the amount of SSDI reported on my SSA-1099-SM?

Contact the Social Security Administration directly. You can call 1-800-772-1213 or visit your local Social Security office. If Social Security issued the wrong amount, they will send you a corrected form. Do not file your tax return until you have the correct form.

Does the SSDI tax threshold change every year?

No. The thresholds of $25,000 for single filers and $32,000 for married filers have been in place since 1984 and have not increased. This means that over time, more SSDI recipients have crossed the threshold due to inflation and wage growth, even though the law has not changed.

If I owe tax on my SSDI, can I have it withheld from my benefits?

Yes. You can request that the Social Security Administration withhold federal income tax from your SSDI payments. Complete Form W-4V and submit it to your local Social Security office or mail it to Social Security. Withholding can help you avoid a large tax bill when you file your return.