Whether You Must File Taxes on SSDI Depends on Your Total Income

You may have to file a federal tax return even though you receive Social Security Disability Insurance (SSDI), depending on how much money you earned that year and whether you have other income. The Social Security Administration does not automatically withhold taxes from SSDI payments, so you are responsible for determining whether filing is required. The threshold changes each year and depends on your filing status, age, and whether you have wages or other income sources.

The basic rule: if your combined income (SSDI plus wages, interest, dividends, or other earnings) exceeds a certain amount, you must file. For 2024, a single person under 65 must file if their combined income is more than $14,600. A married person filing jointly must file if combined income exceeds $29,200. These thresholds increase slightly each year and are higher if you are 65 or older. The IRS publishes updated thresholds each January.

SSDI itself is not automatically taxable, but it becomes taxable when your total income crosses a threshold. This is different from regular Social Security retirement benefits, which follow the same rule but with different income limits. The key is calculating your "combined income," which includes half of your SSDI payments plus all other income you received.

Key Takeaways

  • You must file a federal tax return if your combined income (SSDI plus other earnings) exceeds the annual threshold for your filing status, which is $14,600 for single filers under 65 in 2024.
  • Combined income includes half of your SSDI payments plus all wages, self-employment income, interest, dividends, and other earnings for the year.
  • The IRS publishes updated income thresholds each January, so you should check the current year's limits before deciding whether to file.
  • Even if you are not required to file, you may want to file anyway if you had taxes withheld from wages or are owed a refund.
  • You will receive a Social Security Benefit Statement (Form SSA-1099) by January 31 showing your SSDI payments for the previous year.

How to Calculate Your Combined Income

The IRS uses a specific formula to determine whether SSDI becomes taxable. Start with the total SSDI you received in the year. Take half of that amount. Then add all other income: W-2 wages, self-employment income, interest, dividends, capital gains, rental income, and any other earnings. The sum is your "combined income."

If your combined income is below the threshold for your filing status, you do not have to file and none of your SSDI is taxable. If your combined income exceeds the threshold, a portion of your SSDI becomes taxable — but not all of it. The IRS uses a two-tier system: up to 85 percent of your SSDI can become taxable, depending on how far above the threshold you are. This means even if you are over the threshold, you may owe tax on only a small portion of your benefits.

Example: You are single, under 65, and received $12,000 in SSDI during 2024. You also earned $4,000 in wages. Your combined income is ($12,000 ÷ 2) + $4,000 = $10,000. Since $10,000 is below the $14,600 threshold, you do not have to file and none of your SSDI is taxable.

Another example: You are single, under 65, and received $12,000 in SSDI. You earned $5,000 in wages. Your combined income is ($12,000 ÷ 2) + $5,000 = $11,000. Still below $14,600, so no filing required and no tax on SSDI.

When SSDI Becomes Taxable

SSDI becomes taxable only when your combined income exceeds the threshold. For a single person under 65, that threshold is $14,600 in 2024. For a married couple filing jointly, it is $29,200. If you are 65 or older, the thresholds are higher: $18,450 for single filers and $34,500 for married filing jointly.

Once you cross the threshold, the amount of SSDI that becomes taxable is calculated using a formula. Up to 50 percent of the excess over the threshold becomes taxable. If your combined income is very high, up to 85 percent of your SSDI can become taxable. This is a complex calculation, and the IRS provides a worksheet in Publication 915 to help you work through it.

You do not owe tax on the full amount of SSDI you received — only on the portion the IRS determines is taxable based on your combined income. This is why it is important to calculate combined income correctly. Many people with SSDI and little other income will never have taxable SSDI because their combined income stays below the threshold.

What Documents You Need to File

You will receive a Social Security Benefit Statement (Form SSA-1099) from the Social Security Administration by January 31 each year. This form shows the total SSDI you received in the previous year. You need this form to calculate your combined income and to file your tax return.

You will also need documentation of any other income: W-2 forms from employers, 1099 forms for self-employment or other earnings, bank statements showing interest, and records of any other income sources. Gather these documents before you start your tax return.

If you file your own return using tax software, the software will walk you through the calculation of combined income and determine how much of your SSDI is taxable. If you use a tax preparer or accountant, bring the SSA-1099 and all other income documents with you.

Filing Your Return When You Have SSDI

If you determine that you must file, use Form 1040 (the standard individual income tax return). You will report your SSDI on line 5b of Schedule 1, which is attached to Form 1040. The amount you report is the taxable portion of your SSDI, not the full amount you received.

The calculation of taxable SSDI is done on a worksheet in IRS Publication 915, or your tax software will calculate it for you. You do not have to do the math by hand — tax software handles this automatically once you enter your SSA-1099 information.

File your return by the important date, which is usually April 15. If you cannot file by then, you can request an extension, but an extension to file is not an extension to pay. If you owe tax, you should pay it by April 15 to avoid penalties and interest.

What Happens If You Do Not File When Required

If you are required to file but do not, the IRS may assess penalties and interest on any tax you owe. The failure-to-file penalty is 5 percent of unpaid tax for each month the return is late, up to 25 percent. Interest accrues daily on unpaid tax.

If you realize you missed a filing important date in a previous year, you can still file that return. The IRS generally allows you to file back returns going back several years. Filing late is better than not filing at all, because it stops the accumulation of penalties and interest. If you owe tax, you can set up a payment plan with the IRS.

When to File Even If You Are Not Required To

You may want to file a return even if you are not required to, for several reasons. If your employer withheld federal income tax from your wages, you may be owed a refund. If you are owed a refund, filing allows you to claim it. You cannot get a refund unless you file.

You may also want to file if you are owed the Earned Income Tax Credit (EITC) or the Additional Child Tax Credit. These are refundable credits, meaning you can receive money from the IRS even if you owe no tax. To claim them, you must file a return.

If you are not sure whether you should file, the safest approach is to file anyway. Filing when you are not required to does no harm, and it may result in a refund or a credit you would otherwise miss.

Frequently Asked Questions

Do I have to pay estimated taxes on SSDI?

No. SSDI itself does not require estimated tax payments. However, if you have other income (wages or self-employment income) that is not subject to withholding, you may need to make estimated tax payments on that income. Contact a tax preparer or the IRS if you are unsure.

Will receiving SSDI affect my tax refund?

SSDI does not directly affect your refund, but the amount of SSDI that is taxable counts as income on your return. If your SSDI pushes you into a higher tax bracket or reduces your may be able to access for certain credits, it could affect your refund. This is rare for people with SSDI and little other income.

What if I received SSDI for only part of the year?

Your SSA-1099 will show only the SSDI you received during the months you were may be able to access. Use that amount to calculate your combined income. The same thresholds explore whether you received SSDI for the full year or part of the year.

Can I file electronically if I have SSDI?

Yes. You can file electronically using tax software, a tax preparer, or the IRS Free File program if your income is below the threshold. Electronic filing is faster and more accurate than paper filing.

Where do I report SSDI income on my tax return?

Report the taxable portion of your SSDI on line 5b of Schedule 1, which attaches to Form 1040. Your tax software will direct you to the correct line. Do not report SSDI on any other line of the return.