You may owe federal income tax on SSDI, even though the benefit itself is not taxable

Social Security Disability Insurance (SSDI) payments are not taxable income on their own. However, if you have other income—wages, self-employment earnings, interest, dividends, pensions, or certain other sources—a portion of your SSDI may become taxable. The IRS uses a formula that counts up to 85 percent of your benefits as income in specific situations. This means you could owe tax on SSDI even if you earn very little from other sources.

The threshold that triggers this tax depends on your filing status and your "combined income," which is defined as your adjusted gross income plus nontaxable interest plus half your SSDI benefits. If your combined income exceeds $25,000 (single filer) or $32,000 (married filing jointly), you may owe tax on part of your benefits. These thresholds have not changed since 1984.

You do not have to file a tax return if your income is below the standard threshold for your filing status—but you may want to file anyway to claim refundable tax credits like the Earned Income Tax Credit (EITC) or the Additional Child Tax Credit, which can result in a refund even if you owe no tax.

Key Takeaways

  • SSDI itself is not taxable, but it can make other income taxable and trigger tax on part of your benefits if your combined income exceeds $25,000 (single) or $32,000 (married filing jointly).
  • Combined income includes your adjusted gross income, nontaxable interest, and half your SSDI benefits—not just wages.
  • The IRS uses Form 1040 or Form 1040-SR to report SSDI, and you report the amount shown on your SSA-1099 form.
  • You may owe tax on up to 85 percent of your SSDI if your combined income is high enough, but the exact amount depends on how much other income you have.
  • Filing a tax return even when you do not owe tax can result in a refund if you work part-time or have dependents.

How the IRS calculates taxable SSDI

The IRS uses a two-tier system. In the first tier, if your combined income exceeds $25,000 (single) or $32,000 (married filing jointly), you may owe tax on up to 50 percent of your SSDI. In the second tier, if your combined income exceeds $34,000 (single) or $44,000 (married filing jointly), you may owe tax on up to 85 percent of your SSDI.

The actual amount taxed depends on how far your combined income exceeds the threshold. The IRS worksheet in the instructions to Form 1040 walks you through this calculation step by step. Many people find it easier to use tax software or work with a tax preparer, because the formula involves multiple steps and is straightforward to get wrong by hand.

Example: You are single and receive $1,200 per month in SSDI ($14,400 per year). You also earn $15,000 from part-time work. Your combined income is $15,000 + $0 (nontaxable interest) + $7,200 (half your SSDI) = $22,200. This is below $25,000, so none of your SSDI is taxable. You owe no tax on your benefits, though you may still owe tax on your wages.

If instead you earned $20,000 from part-time work, your combined income would be $20,000 + $0 + $7,200 = $27,200. This exceeds $25,000 by $2,200. You would owe tax on the lesser of (a) 50 percent of the excess ($1,100) or (b) 50 percent of your SSDI ($7,200). In this case, $1,100 of your SSDI becomes taxable income.

What documents you need and where to report SSDI on your return

The Social Security Administration sends you a Form SSA-1099 by January 31 each year. This form shows the total SSDI you received in the prior year. You will receive one SSA-1099 for each Social Security account, so if you receive both SSDI and retirement benefits, you may receive two forms.

You report your SSDI on Form 1040 (the main federal income tax return) or Form 1040-SR (for taxpayers age 65 and older). On Form 1040, SSDI goes on line 5b under "Social security benefits." You enter the total from your SSA-1099, then on the next line you enter the taxable portion (the amount calculated using the IRS worksheet). The difference between these two numbers is the nontaxable portion.

You do not report SSDI on a separate form or schedule. It all goes on the main return. If you use tax software, the program will ask you for the total SSDI and will calculate the taxable amount for you using the IRS formula.

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

You are not required to file a federal income tax return if your total income is below the standard threshold for your filing status and age. For 2024, the threshold is $14,600 for a single person under 65, $18,450 for a single person 65 or older, and $29,200 for a married couple filing jointly (under 65). These thresholds increase slightly each year.

However, you should file a return if you have earned income and meet the income limits for the Earned Income Tax Credit (EITC) or the Additional Child Tax Credit, because these are refundable credits. A refundable credit means the IRS will send you money back even if you owe no tax. For example, if you work part-time and have a child, you may receive a refund of $1,000 or more even though you owe no tax on your SSDI or wages.

To claim the EITC, you must have earned income (wages or self-employment income) and meet income and other requirements. The credit phases out at higher income levels, so it is worth checking whether you may have access to. The IRS has a tool on its website to help you determine if you are may be able to access.

Self-employment income and SSDI

If you are self-employed while receiving SSDI, your net self-employment income counts toward your combined income for tax purposes. This can push you over the threshold and make part of your SSDI taxable. Additionally, you may owe self-employment tax (Social Security and Medicare tax on your net earnings) if your net self-employment income is $400 or more.

Self-employment income is reported on Schedule C (Profit or Loss from Business), which you attach to your Form 1040. You calculate your net profit (income minus business expenses), and that net amount is added to your adjusted gross income. This affects both your income tax and your self-employment tax.

Be aware that self-employment income also affects your SSDI work incentives. If you are working and your earnings exceed the Substantial Gainful Activity (SGA) level, Social Security may determine that you are no longer disabled and may stop your benefits. For 2024, SGA is $1,550 per month for non-blind individuals and $2,590 for blind individuals. Work incentives like the Plan to Achieve Self-Support (PASS) and Impairment Related Work Expenses (IRWE) can help you keep more of your earnings without triggering a work activity review, but you must report them to Social Security separately from your tax return.

Medicare premiums and SSDI taxation

If you receive SSDI, you are automatically enrolled in Medicare Part A (hospital insurance) at age 65. You may also be enrolled in Medicare Part B (medical insurance) and Part D (prescription drug coverage). The premiums for Part B and Part D are deducted directly from your SSDI payment each month.

These premium deductions do not reduce your taxable SSDI. The IRS counts your SSDI before the Medicare premium is taken out. However, if you have high income and are subject to Income-Related Monthly Adjustment Amounts (IRMAA), your Medicare premiums will be higher. IRMAA is based on your modified adjusted gross income from two years prior, which includes half your SSDI benefits. This creates a situation where higher income can increase both your income tax and your Medicare premiums.

Keep records of your Medicare premiums if you itemize deductions, though in most cases you cannot deduct them. However, if you pay Medicare premiums out of pocket (not deducted from your SSDI), you may be able to claim them as a medical expense if you itemize.

Filing status and SSDI taxation

Your filing status affects both the income thresholds that trigger SSDI taxation and your standard deduction. If you are married and file jointly, your combined income threshold is $32,000 (first tier) or $44,000 (second tier). If you are married and file separately, the thresholds are much lower—$0 for the first tier and $9,000 for the second tier. This means married couples filing separately almost always owe tax on some SSDI.

If you are married and your spouse does not receive Social Security benefits, you may still benefit from filing jointly because your spouse's income is included in your combined income calculation. However, if both spouses receive SSDI or Social Security, filing jointly may result in more of both benefits being taxable than if you filed separately—though this is not always the case. It is worth calculating both scenarios or asking a tax preparer to run the numbers.

If you are single and have dependents, you may be able to file as head of household, which gives you a higher standard deduction and different tax brackets. This can reduce your tax liability and may affect whether part of your SSDI is taxable.

Frequently Asked Questions

Do I have to report SSDI on my tax return if none of it is taxable?

No, you do not have to file a federal income tax return if your total income is below the standard threshold for your filing status. However, you should file if you have earned income and may be may have access to to the EITC or other refundable credits, because you could receive a refund.

What if I disagree with the amount on my SSA-1099?

Contact the Social Security Administration directly. You can call 1-800-772-1213 or visit your local Social Security office. Do not file your tax return until you have resolved the discrepancy, because the IRS will match your return against Social Security's records.

Can I deduct my Medicare premiums from my SSDI?

Medicare premiums deducted from your SSDI do not reduce your taxable SSDI amount. The IRS counts your full SSDI before deductions. If you pay premiums out of pocket, you may deduct them as a medical expense only if you itemize deductions, which most people do not.

Will filing a tax return affect my SSDI benefits?

Filing a tax return does not affect your SSDI may be able to access or payment amount. However, if you have work income, Social Security tracks your earnings to may support you do not exceed the Substantial Gainful Activity threshold, which could trigger a work activity review.

What if I owe tax on SSDI but cannot pay?

You can set up a payment plan with the IRS, request an installment agreement, or explore for an offer in compromise if you cannot pay in full. Contact the IRS at 1-800-829-1040 or visit irs.gov to explore your options. Do not ignore the bill, as penalties and interest will accumulate.