You may not owe federal income tax on your SSDI benefits, and the IRS has a specific rule that lets you know whether filing is required

Social Security Disability Insurance (SSDI) benefits are not automatically taxable income. Whether you must file a federal tax return depends on your combined income—a calculation that includes your SSDI, any other income you earned, and half of your SSDI benefits. If your combined income falls below the threshold set by the IRS for your filing status, you have no federal filing requirement, even if taxes were withheld from your benefits.

The IRS publishes these thresholds each year. For 2024, a single person with only SSDI income does not have to file unless their combined income exceeds $15,000. A married couple filing jointly with only SSDI does not have to file unless their combined income exceeds $30,000. These numbers change annually, so you must check the current year's threshold before deciding whether to file.

Not filing when you are not required to does not hurt you. You will not face penalties, and the IRS will not contact you. However, if taxes were withheld from your benefits, you may want to file anyway—because filing allows you to claim a refund of those withheld taxes.

Key Takeaways

  • You do not have to file a federal tax return if your combined income (SSDI plus half your SSDI plus any other income) is below the IRS threshold for your filing status.
  • The IRS threshold for a single person with only SSDI income is $15,000 for 2024, and for a married couple filing jointly it is $30,000.
  • If you did not file and no taxes were withheld from your benefits, you have no obligation to the IRS and will not face penalties.
  • If taxes were withheld from your benefits but you did not file, you may be leaving money on the table—filing allows you to reclaim those withheld taxes as a refund.

How the IRS calculates whether you must file

The IRS does not count your SSDI as income dollar-for-dollar. Instead, it uses a formula called combined income. This formula is: your adjusted gross income (AGI) plus nontaxable interest plus half of your SSDI benefits. The result is what the IRS compares to the filing threshold.

For example, suppose you receive $1,500 per month in SSDI ($18,000 per year) and you have no other income. Your combined income would be $0 (AGI) plus $0 (nontaxable interest) plus $9,000 (half of $18,000) = $9,000. Since $9,000 is below the $15,000 threshold for a single person, you do not have to file.

Now suppose you also earned $8,000 from part-time work. Your combined income would be $8,000 (AGI from wages) plus $0 (nontaxable interest) plus $9,000 (half of SSDI) = $17,000. Since $17,000 exceeds the $15,000 threshold, you would have to file a federal return, even though your total income is only $26,000.

When you should file even though you are not required to

Filing is optional when your income is below the threshold, but it becomes worthwhile if you had federal income tax withheld from your SSDI benefits. The Social Security Administration withholds taxes only if you requested it on Form W-4V when you started receiving benefits. If you did request withholding, the IRS will not automatically return that money—you must file a return to claim the refund.

You should also file if you earned income from work during the year and your employer withheld taxes. Even if your total income is below the filing threshold, filing allows you to reclaim any overpayment. Additionally, if you have dependents or other family members on your household, you may be able to claim the Earned Income Tax Credit (EITC), which requires filing.

Filing is also advisable if you received other income—such as interest, dividends, or self-employment income—even in small amounts. These income sources can push you above the filing threshold or create a tax liability that you would not discover unless you filed.

What happens if you do not file when you are not required to

If your combined income is below the threshold and you do not file, nothing happens. The IRS will not send you a notice, will not assess a penalty, and will not contact you. You have no legal obligation to file, and the government will not pursue you for a return you were not required to submit.

However, if you had taxes withheld from your benefits and you do not file, you will not receive a refund of those withheld taxes. The IRS keeps the money unless you file a return to claim it. You have three years from the original due date of the return to file and claim a refund, so you are not locked out forever—but the longer you wait, the more likely you are to forget or lose the documentation you need.

If you are unsure whether you filed in a previous year, you can contact the IRS at 1-800-829-1040 and ask them to check their records. You can also request a transcript of your account, which shows whether a return was filed under your name and Social Security number.

State income tax requirements are separate from federal requirements

Federal filing rules do not explore to state income tax. Some states do not tax SSDI at all, regardless of your income level. Other states tax SSDI the same way the federal government does—using the combined income formula. A few states have their own thresholds that differ from the federal threshold.

You must check the rules for your specific state. The state tax agency website will list the filing threshold and whether SSDI is taxable. If you live in a state that taxes SSDI and your combined income exceeds that state's threshold, you must file a state return even if you do not have to file a federal return.

Some states allow you to file a federal return without filing a state return, and vice versa. Do not assume that filing one means you must file the other. Contact your state's department of revenue or taxation if you are unsure whether you have a state filing requirement.

How to confirm your filing status before the important date

The safest approach is to calculate your combined income yourself and compare it to the current year's IRS threshold. The IRS publishes these thresholds in Publication 915, "Social Security and Equivalent Railroad Retirement Benefits." You can find this publication free on the IRS website (irs.gov) or request a printed copy by calling 1-800-829-3676.

If you are unsure about your calculation, you can contact the IRS directly. The IRS telephone line for tax questions is 1-800-829-1040. You can also visit a local IRS office or use the IRS Free File program if your income is below a certain threshold—though note that Free File is for preparing a return, not for determining whether you must file.

If you received a Social Security statement showing your benefit amount, use that figure to calculate half your annual SSDI. Add any other income (wages, interest, dividends, self-employment income) to that half-benefit amount. If the total is below the threshold for your filing status, you do not have to file.

Frequently Asked Questions

Can I get in trouble with the IRS if I do not file when I am not required to?

No. If your combined income is below the filing threshold, you have no legal obligation to file a federal return. The IRS will not penalize you, contact you, or take any action against you for not filing. You are only required to file if your income exceeds the threshold.

If I do not file, will Social Security stop my benefits?

No. Social Security does not stop benefits because you did not file a tax return. The two programs are separate. However, if you have work income, Social Security may reduce your benefits if you earn above the annual earnings limit—but that is a Social Security rule, not a tax rule, and it applies whether or not you file a return.

What if I filed in previous years but did not have to?

Filing when you were not required to does not create a problem. You straightforward filed a return showing income below the threshold, and the IRS processed it. If you had taxes withheld, filing allowed you to claim a refund. There is no penalty for filing when you were not required to.

Do I have to file if I received a 1099-SSA form from Social Security?

No. The 1099-SSA is an informational form that Social Security sends to all SSDI recipients. It does not mean you have to file a tax return. You still use the combined income formula to determine whether filing is required. Many people receive a 1099-SSA and have no filing obligation because their combined income is below the threshold.

If I do not file, can I still claim a refund later?

Yes, but only within three years of the original due date of the return. If you had taxes withheld and did not file, you can file a return up to three years later and claim a refund of those withheld taxes. After three years, the IRS keeps the money. Keep any documents showing withholding (such as your Social Security statement or a letter from Social Security) so you can prove the amount withheld.