You must file taxes on SSDI if your income exceeds the threshold for your filing status, even though some SSDI is tax-free

Social Security Disability Insurance (SSDI) payments themselves are not automatically taxable. But whether you owe federal income tax depends on your combined income—a calculation that includes SSDI plus other earnings, interest, dividends, and certain other sources. The IRS calls this "combined income," and it determines both whether you file and how much of your SSDI is taxable.

The threshold varies by filing status. For a single filer in 2024, you must file if your combined income exceeds $15,000. For married filing jointly, the threshold is $30,000. For married filing separately, it is $0—meaning you must file if you have any combined income at all. These thresholds change yearly, so check the current year's rules on the IRS website or Form SSA-1040 instructions before you file.

If you fall below the threshold, you are not required to file—but you may want to anyway. If taxes were withheld from other income sources, filing lets you claim a refund. If you have dependents or may have access to for the Earned Income Tax Credit (EITC), filing can result in money back.

Key Takeaways

  • Combined income—SSDI plus wages, interest, and other sources—determines whether you must file and how much SSDI is taxable.
  • The IRS provides a worksheet on Form SSA-1040 instructions to calculate combined income and the taxable portion of your SSDI.
  • Up to 85 percent of your SSDI can be taxable if combined income is high enough, but most SSDI recipients pay no tax on their benefits.
  • You report SSDI on Form 1040 or 1040-SR (for age 65 and older), and the SSA sends you a Form SSA-1099 each January showing your annual SSDI.
  • If you work and earn wages while on SSDI, those wages count toward combined income and may trigger tax filing and SSDI taxation.

How the IRS calculates combined income and taxable SSDI

The IRS uses a specific formula to determine how much of your SSDI is taxable. Combined income is calculated as: your Adjusted Gross Income (AGI) plus nontaxable interest plus half of your SSDI benefits. This number is then compared to two "base amounts" set by the IRS.

For single filers, the first base amount is $25,000. For married filing jointly, it is $32,000. For married filing separately, it is $0. If your combined income falls below the first base amount, none of your SSDI is taxable. If it exceeds the first base amount, up to 50 percent of the excess is taxable—up to a maximum of 50 percent of your total SSDI for the year.

If your combined income exceeds the second base amount ($34,000 for single filers, $44,000 for married filing jointly), the calculation becomes more complex. Up to 85 percent of your SSDI can be taxable. The IRS provides a detailed worksheet in the instructions to Form 1040 and Form SSA-1040 to walk through this calculation step by step. Most SSDI recipients fall below the thresholds and owe no tax on their benefits.

What forms you need and where to report SSDI

The Social Security Administration sends you a Form SSA-1099 each January showing the total SSDI you received in the prior year. This form goes to you and to the IRS. You use the amount shown on Box 5 of the SSA-1099 when you file your federal tax return.

You report SSDI on Form 1040 (the standard federal income tax form) or Form 1040-SR if you are age 65 or older. The SSDI amount goes on line 5b of Form 1040 or line 5b of Form 1040-SR, labeled "Social security benefits." You also enter the taxable portion of your SSDI on line 5b if any is taxable. The IRS worksheet tells you what that taxable amount is.

If you file using tax software, the software will prompt you to enter your SSDI and walk you through the combined income calculation. If you file by hand, use the worksheet in the Form 1040 instructions or the Form SSA-1040 instructions (a simplified version for Social Security recipients). If you use a tax preparer or accountant, bring your SSA-1099 and any other income documents with you.

SSDI and earned income: how wages affect your tax filing

If you work and earn wages while receiving SSDI, those wages are added to your combined income calculation. This can push you over the threshold for filing and can increase the taxable portion of your SSDI. Wages are also subject to federal income tax withholding, which means taxes may already be coming out of your paycheck.

SSDI has its own work incentive rules that allow you to earn money without losing your SSDI check—at least for a time. The Trial Work Period lets you earn any amount for nine months without affecting your SSDI. After that, the Extended may be able to access Period allows you to earn up to a monthly threshold (called Substantial Gainful Activity, or SGA) without losing benefits. In 2024, SGA is $1,550 per month for non-blind individuals and $2,590 for blind individuals. These thresholds change yearly.

Even if your earnings do not affect your SSDI check, they still count toward combined income for tax purposes. If you earn $10,000 in wages and receive $15,000 in SSDI, your combined income includes both amounts. This may trigger a tax filing requirement and may make some of your SSDI taxable.

State income tax and SSDI

Most states do not tax SSDI benefits. However, a handful of states—including Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont—tax some or all of Social Security benefits under certain conditions. The rules vary by state and by income level.

If you live in one of these states, check your state's tax agency website or ask a tax preparer whether your SSDI is subject to state tax. You may need to file a state return even if you do not owe federal tax. Some states conform to the federal combined income calculation; others use their own rules.

Federal SSDI is never subject to state tax withholding at the source. If you owe state tax on your SSDI, you pay it when you file your state return or through estimated tax payments.

When to file early and when you might get a refund

You are not required to file if your income is below the threshold. But filing can be worth it if you have a refund coming. Common reasons SSDI recipients get refunds include: taxes withheld from wages, taxes withheld from a pension or other income source, or a tax credit you are may have access to to claim.

The Earned Income Tax Credit (EITC) is a major refundable credit for people with low to moderate income who work. If you earned wages in 2024 and your income is below the EITC limit, you may be may have access to to a credit of several hundred to several thousand dollars. You must file to claim it. The EITC phases out as income rises, so even if you do not owe tax, filing can result in a substantial refund.

The Child Tax Credit is another refundable credit. If you have dependent children and your income is below the phase-out threshold, you may be may have access to to $2,000 per child. Again, you must file to claim it. File as early as possible after you receive your SSA-1099 (usually mid-February) to get your refund faster.

What happens if you do not file when you should

If your combined income exceeds the filing threshold and you do not file, the IRS may contact you. The IRS matches information from your SSA-1099 against your tax records. If you should have filed and did not, the IRS can assess a penalty and interest on any tax owed.

The penalty for failing to file is usually 5 percent of the unpaid tax for each month the return is late, up to 25 percent total. Interest accrues daily on any unpaid tax. If you owe a small amount, the penalty and interest can quickly exceed the tax itself.

If you realize you should have filed in a prior year, file that return as soon as you can. The IRS often waives penalties if you file late but have a reasonable cause—such as not knowing you had to file. Include a brief explanation with your return. If you owe tax, paying it stops interest from accruing on future months.

Free and low-cost tax filing resources for SSDI recipients

The IRS offers free tax filing through the Free File program if your income is below a certain threshold (usually around $79,000 for 2024, though this changes yearly). You can use IRS-approved tax software at no cost or file directly through the IRS website. Visit IRS.gov and search "Free File" to see if you may have access to and to find participating software providers.

If your income exceeds the Free File threshold, you can still file for free through VITA (Volunteer Income Tax information) sites. VITA is run by the IRS and staffed by trained volunteers who prepare returns at no charge. Find a VITA site near you by calling 211 or visiting the IRS website. VITA sites are especially helpful if you have questions about SSDI taxation or combined income.

Many community centers, libraries, and senior centers also offer free tax preparation during tax season. Some disability organizations provide tax help specifically for people receiving SSDI. Ask your local Social Security office or disability advocacy group whether free preparation is available in your area.

Frequently Asked Questions

Is all of my SSDI taxable?

No. Most SSDI recipients pay no tax on their benefits because their combined income falls below the IRS threshold. If your combined income is high enough, up to 85 percent of your SSDI can be taxable, but the majority of recipients owe nothing. Use the IRS worksheet to calculate your specific situation.

Do I have to file if I am below the income threshold?

No, you are not required to file. But you should file if taxes were withheld from wages or other income, or if you have dependents or earned income that qualifies you for the EITC or Child Tax Credit. Filing can result in a refund even if you owe no tax.

What if I earned money while on SSDI—does that change my taxes?

Yes. Wages count toward your combined income, which may trigger a filing requirement and may make some of your SSDI taxable. However, SSDI work incentives allow you to earn money for a time without losing your check. The earnings still count for tax purposes, but they do not reduce your SSDI payment during the Trial Work Period.

When do I get my SSA-1099?

The Social Security Administration mails Form SSA-1099 in January of the year following the tax year. For example, your 2024 SSDI is reported on an SSA-1099 sent in January 2025. If you do not receive it by early February, contact Social Security to request a copy or view it online through your my Social Security account.

Can I file my taxes online if I receive SSDI?

Yes. You can use IRS-approved tax software through the Free File program if your income qualifies, or you can use commercial tax software. The software will guide you through entering your SSDI and calculating the taxable portion. If you prefer in-person help, VITA sites offer free preparation year-round.