You may owe federal income tax on part of your SSDI benefits, depending on your total income

Whether you file taxes on SSDI depends on how much money you received that year and whether you had other income. Social Security uses a formula called "combined income" to decide if any of your benefits are taxable. Combined income includes your adjusted gross income, non-taxable interest, and half of your Social Security benefits. If your combined income exceeds a certain threshold, you'll report a portion of your benefits as taxable income on your federal tax return.

The thresholds are $25,000 for single filers and $32,000 for married couples filing jointly. These numbers have not changed since 1984. If your combined income falls below these thresholds, your SSDI is not taxable and you may not need to file at all—though other circumstances might require you to file anyway.

State taxes work differently. Most states do not tax Social Security benefits at all. A few states tax SSDI the same way the federal government does. Check your state's tax authority website or ask a tax preparer whether your state taxes Social Security income.

Key Takeaways

  • You calculate whether SSDI is taxable using "combined income," which includes half your benefits plus all other income sources.
  • Federal tax applies to part of your benefits only if combined income exceeds $25,000 (single) or $32,000 (married filing jointly).
  • Social Security sends Form SSA-1099 in January showing your total benefits for the previous year; use this to complete your tax return.
  • Most states do not tax SSDI, but a handful do—check your state's rules before filing.
  • If you owe taxes on benefits, you can request that Social Security withhold federal income tax directly from your monthly payment.

Understanding combined income and the tax threshold

Combined income is the number that determines whether any of your SSDI is taxable. It is calculated as: your adjusted gross income (wages, self-employment income, taxable pensions, and taxable interest) plus non-taxable interest (such as interest from municipal bonds) plus half of your Social Security benefits for the year.

Once you know your combined income, compare it to your filing status threshold. If you are single and your combined income is $25,000 or less, none of your benefits are taxable. If it exceeds $25,000, you may have to include some benefits as income. If you are married filing jointly, the threshold is $32,000. If you are married filing separately, the threshold is $0—meaning any combined income at all may trigger taxation of your benefits.

The amount of benefits that becomes taxable is never more than 85 percent of what you received. The actual calculation is complex and involves two separate formulas, but the IRS worksheet in the instructions for Form 1040 walks you through it step by step. Many tax software programs calculate this automatically if you enter your Social Security income correctly.

Getting your Social Security income information from Form SSA-1099

In January of each year, Social Security mails Form SSA-1099 to every person who received benefits during the previous year. This form shows the total amount of SSDI you received in that calendar year, broken down by month. You need this form to file your taxes accurately.

If you did not receive Form SSA-1099 by early February, contact Social Security at 1-800-772-1213 or visit your local Social Security office to request a replacement. You can also create a my Social Security account online at ssa.gov to view and print your SSA-1099 electronically. Do not estimate your benefits—use the exact figure from the form.

Keep your SSA-1099 with your tax records. If you file electronically, you do not need to mail the form, but you must have it available if the IRS asks questions about your return later.

Reporting SSDI on your federal tax return

If you determined that part of your benefits are taxable, you report them on Form 1040 (the main federal income tax form). The taxable portion goes on line 5b, labeled "Social Security benefits." You also enter the total benefits you received on line 5a. The IRS uses both numbers to verify your calculation.

If your only income is SSDI and it is not taxable, you may not need to file a federal return at all. However, you should file if you had other income (wages, self-employment income, pensions, or interest) that pushes you over the filing threshold for your age and filing status. The IRS publishes filing requirement tables each year based on age and income type.

If you use tax software, it will prompt you to enter your Social Security information and calculate the taxable portion for you. If you work with a tax preparer or CPA, bring your SSA-1099 and information about any other income you received that year.

Requesting tax withholding on your SSDI payments

If you know you will owe taxes on your benefits, you can ask Social Security to withhold federal income tax directly from your monthly SSDI payment. This way you do not have to pay a large amount when you file your return. You request withholding by completing Form W-4V (Voluntary Withholding Request) and submitting it to Social Security.

You can choose to have 7, 10, 12, or 22 percent of your monthly benefit withheld. Social Security will send you a notice confirming the withholding rate and the amount that will be taken from each payment. You can change or stop withholding at any time by submitting a new Form W-4V.

read Form W-4V from ssa.gov, or call 1-800-772-1213 to request a copy by mail. Mail the completed form to your local Social Security office, or bring it in person. Processing typically takes two to four weeks.

What to do if you cannot pay taxes owed on your benefits

If you file your tax return and owe money but cannot pay it all at once, you have options. You can request a payment plan from the IRS, which allows you to pay in installments over time. The IRS charges interest and a setup fee, but the monthly payment is usually manageable.

You can also request an extension to file your return (Form 4868), which gives you until October 15 to file, though you still owe any taxes due by April 15. If you expect a refund, there is no penalty for filing late, so you can take time to gather documents and file when ready.

Contact the IRS at 1-800-829-1040 to discuss payment options, or work with a tax preparer who can help you set up a plan. Some community organizations offer free tax help to people with low income—search for "VITA" (Volunteer Income Tax information) sites in your area.

State tax considerations for SSDI

Thirty-eight states and the District of Columbia do not tax Social Security benefits at all. If you live in one of these states, you do not report SSDI on your state return even if it is taxable federally.

Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont tax Social Security benefits using rules similar to federal law. They use the same combined income thresholds or their own versions. Illinois and Mississippi tax benefits but offer exemptions for people over a certain age or with income below a threshold. Check your state's department of revenue website or ask a local tax preparer about your state's specific rules.

If you moved to a new state during the year, you may need to file part-year returns in both states. This is especially important if one state taxes benefits and the other does not.

Frequently Asked Questions

Do I have to file taxes if my only income is SSDI?

Not necessarily. If your SSDI is not taxable (combined income below the threshold) and you have no other income, you do not have to file. However, if you had wages, self-employment income, or other earnings, you may need to file even if your SSDI is not taxable. Check the IRS filing requirement tables for your age and filing status.

What if I made a mistake on a previous year's tax return involving SSDI?

You can file an amended return using Form 1040-X for any of the past three years. If you owe additional tax, you will owe interest and possibly penalties. If you are owed a refund, file as soon as possible. A tax professional can help you determine what needs to be corrected.

Can I deduct medical expenses related to my disability?

Yes, if your medical expenses exceed 7.5 percent of your adjusted gross income, you can deduct the amount over that threshold on Schedule A (itemized deductions). This includes doctor visits, medications, equipment, and some home modifications. You must itemize deductions rather than take the standard deduction to claim medical expenses.

Will receiving SSDI affect my tax refund or credits?

SSDI itself does not reduce tax credits like the Earned Income Tax Credit (EITC) or the Child Tax Credit. However, if you have other income that pushes you over the income limits for these credits, you may lose them. The combined income calculation for SSDI taxation is different from the income calculation for tax credits, so check the rules for each credit separately.

What happens if Social Security withholds too much or too little tax from my benefits?

If too much is withheld, you will receive a refund when you file your return. If too little is withheld and you owe money, you can adjust the withholding rate on a new Form W-4V or set up a payment plan with the IRS. You can change your withholding at any time.