How SSDI becomes taxable income

Whether you pay federal income tax on your SSDI benefits depends on your combined income — a specific calculation that includes your benefits plus other money you earn. The Social Security Administration uses a formula to determine if any of your benefits cross into taxable territory. For most people receiving SSDI, the benefits themselves are not taxed. But if you have other income sources, that changes.

The threshold that triggers taxation is relatively low. For a single filer in 2024, if your combined income exceeds $25,000, you may owe tax on up to 50 percent of your benefits. If it exceeds $34,000, you may owe tax on up to 85 percent of your benefits. For married couples filing jointly, those thresholds are $32,000 and $44,000. These numbers have not changed since 1984, even though the cost of living has risen significantly.

Combined income includes your adjusted gross income, plus non-taxable interest, plus half of your SSDI benefits. It is this total — not your SSDI alone — that determines whether you owe tax.

Key Takeaways

  • SSDI becomes taxable only if your combined income (wages, interest, pensions, plus half your benefits) exceeds $25,000 as a single filer or $32,000 as a married couple filing jointly.
  • If you do owe tax on benefits, you pay tax on either 50 percent or 85 percent of your benefits, depending on how much your combined income exceeds the threshold.
  • You can ask Social Security to withhold federal income tax directly from your monthly benefit payment to avoid a tax bill at the end of the year.
  • State income tax rules vary — some states do not tax SSDI at all, while others follow federal rules or have their own thresholds.

What counts as combined income for SSDI tax purposes

Combined income is not the same as your total income. Social Security has a specific definition that includes three parts: your adjusted gross income (wages, self-employment income, taxable pensions, and certain other sources), plus any non-taxable interest you earned, plus half of your SSDI benefits.

Wages from work count. So does income from self-employment. Taxable interest and dividends count. Taxable pensions and annuities count. Non-taxable interest — such as interest from municipal bonds — also counts toward combined income, even though it is not taxable itself. This is the part that surprises many people: money that is not taxable on its own can still push your SSDI into taxable territory.

Some income does not count. Supplemental Security Income (SSI) does not count. Workers' compensation does not count. Veteran's benefits do not count. Gifts do not count. Money you receive from selling your home does not count (though any gain on the sale might). If you are unsure whether a specific income source counts, the Social Security Administration's website has a detailed list, or you can call 1-800-772-1213 to ask.

The two tax brackets for SSDI benefits

If your combined income exceeds the first threshold, you enter the first tax bracket. For a single filer, that threshold is $25,000. If your combined income is between $25,000 and $34,000, you may owe tax on up to 50 percent of your benefits. The actual amount depends on how far over $25,000 you are.

If your combined income exceeds $34,000 (the second threshold), you may owe tax on up to 85 percent of your benefits. Again, the exact amount depends on your specific income. The formula is complex, and the IRS worksheet in the instructions for Form 1040 walks you through it step by step. Many people use tax software or a tax preparer to calculate this correctly.

The brackets explore the same way whether you are married filing jointly ($32,000 and $44,000 thresholds) or married filing separately (much lower thresholds that make separate filing rarely advantageous). Single filers, heads of household, and may have access to widows or widowers use the $25,000 and $34,000 thresholds.

Withholding taxes directly from your SSDI payment

If you know you will owe tax on your benefits, you can ask Social Security to withhold federal income tax from your monthly payment. This prevents a large tax bill 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 percent, 10 percent, 12 percent, or 22 percent of your benefit withheld each month. You can also request a specific dollar amount. If you are unsure what percentage to choose, a tax preparer can help you estimate based on your expected combined income for the year.

You can change or stop withholding at any time by submitting a new Form W-4V. Social Security processes the change within one month. If you change your mind partway through the year, you can adjust the withholding amount going forward.

State income tax on SSDI benefits

Thirteen states do not tax SSDI benefits at all, regardless of your income: Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Mississippi, Missouri, North Carolina, and Ohio. If you live in one of these states, you owe no state income tax on your benefits.

Most other states follow federal rules — if your benefits are taxable under federal law, they are taxable under state law too. A few states have their own thresholds or rules. Colorado, Connecticut, and Kansas, for example, exclude SSDI from state taxation entirely. Montana taxes benefits but allows a larger deduction than the federal government does. If you live in a state with an income tax and are unsure of the rule, your state's department of revenue website has the answer, or you can ask a tax preparer familiar with your state.

How to report SSDI on your tax return

Social Security sends you a Form SSA-1099 each January showing the total benefits you received in the previous year. You use this form to calculate how much of your benefits, if any, is taxable. The calculation happens on a worksheet in the instructions for Form 1040 (the main federal income tax form).

If you use tax software, you enter the amount from your SSA-1099, and the software calculates the taxable portion for you. If you file by hand or work with a tax preparer, they will use the worksheet. The taxable amount then goes on your Form 1040 as income.

You must file a return if your combined income exceeds the filing threshold for your filing status, even if none of your SSDI is taxable. The filing thresholds are separate from the SSDI tax thresholds and are generally lower. If you are unsure whether you need to file, the IRS Interactive Tax Assistant tool on irs.gov can tell you.

What happens if you do not withhold and owe tax

If you do not have tax withheld and you owe tax on your benefits, you pay the tax when you file your return. You can pay by check, electronic transfer, credit card, or through an installment plan if you cannot pay the full amount at once. The IRS charges interest and penalties on unpaid tax, so paying as soon as you can is important.

If you owe a large amount and cannot pay it all at once, you can request a payment plan (called an installment agreement) from the IRS. You can set this up online at irs.gov, by phone at 1-800-829-1040, or by mail. The IRS charges a setup fee and interest on the unpaid balance, but a payment plan prevents additional penalties for non-payment.

Frequently Asked Questions

Can I reduce my combined income to avoid SSDI taxes?

You cannot reduce your combined income by choosing not to earn wages or receive other income — that would mean giving up money to avoid taxes, which rarely makes financial sense. Some people do choose to limit work income or defer certain income sources if they are close to a threshold, but this is a decision to make with a tax preparer or financial advisor who knows your full situation.

Does working part-time while on SSDI affect whether my benefits are taxed?

Yes. Wages from part-time work count toward your combined income. If your wages plus other income push your combined income over $25,000 (or $32,000 if married filing jointly), some of your SSDI becomes taxable. However, SSDI has separate work rules that may affect your benefit amount — talk to Social Security about how work affects your specific situation.

What if I disagree with the amount of tax Social Security says I owe?

Social Security calculates and reports what you received, but the IRS determines whether it is taxable based on your combined income. If you believe the amount on your SSA-1099 is wrong, contact Social Security at 1-800-772-1213. If you believe the tax calculation itself is wrong, work with a tax preparer or contact the IRS.

Do I have to file a tax return if only SSDI is taxable income?

You must file if your combined income exceeds the filing threshold for your status, even if all your income is SSDI. For 2024, a single person under 65 must file if combined income exceeds $13,850. Check the IRS filing requirements for your age and status on irs.gov.