Whether your SSDI is taxable depends on your total income, not on the SSDI itself

Social Security Disability Insurance (SSDI) can be taxable, but only if your combined income exceeds a certain threshold. The IRS calls this "combined income," and it includes your SSDI payments plus other money you receive — wages, interest, pensions, and certain other sources. If your combined income stays below the threshold, you owe no federal tax on your SSDI. If it goes above, a portion of your SSDI becomes subject to tax.

The threshold is $25,000 for single filers and $32,000 for married couples filing jointly. These thresholds have not changed since 1984. If you are married and file separately, the threshold is $0 — meaning any SSDI combined with any other income makes some of it taxable.

Key Takeaways

  • SSDI becomes taxable only if your combined income (SSDI plus other income) exceeds $25,000 for single filers or $32,000 for married couples filing jointly.
  • Combined income includes wages, self-employment income, interest, dividends, pensions, and certain other sources, but not Supplemental Security Income (SSI).
  • If you cross the threshold, only a portion of your SSDI is taxable — not all of it — and the calculation depends on how far over you go.
  • You can request that the Social Security Administration withhold federal income tax from your SSDI payments to avoid a tax bill at filing time.

How combined income is calculated

Combined income is not the same as your SSDI payment. The IRS adds your SSDI to other income sources, then includes half of your SSDI amount in the total. So if you receive $1,200 per month in SSDI ($14,400 per year) and earn $15,000 in wages, your combined income is $15,000 + (half of $14,400) = $22,200. You would stay under the $25,000 threshold and owe no tax on your SSDI.

The sources that count toward combined income are: wages from work, net self-employment income, taxable interest, dividends, capital gains, taxable pensions, taxable annuities, rental income, and royalties. Supplemental Security Income (SSI) does not count. Neither do gifts, inheritances, or money you borrow.

Some types of interest and dividends may not count if they are tax-exempt — for example, interest from municipal bonds. Your tax return or a tax professional can help you determine which of your income sources count.

How much of your SSDI becomes taxable

If your combined income exceeds the threshold, the IRS uses a two-tier formula to determine how much of your SSDI is taxable. The calculation is not straightforward, and the amount taxed depends on how far over the threshold you are.

In general, up to 50% of your SSDI can be taxable if you are in the first tier, and up to 85% can be taxable if you are in the second tier. You will never pay tax on more than 85% of your SSDI, even if your income is very high. The exact amount depends on the specific numbers in your situation, which is why many people use tax software or a tax professional to calculate it.

The IRS publishes a worksheet in Publication 915 that walks through the calculation step by step. If you do your own taxes, this worksheet is the tool to use.

State taxes on SSDI

Federal tax rules do not apply to state income tax. Some states do not tax SSDI at all, regardless of your income. Other states follow the federal rule and tax SSDI if your combined income exceeds their threshold. A few states have their own thresholds that differ from the federal $25,000 or $32,000.

Check your state's tax agency website or ask a tax professional about your state's rules. If you live in a state that taxes SSDI and your income is high enough to trigger federal tax, you may owe state tax as well.

Withholding taxes from your SSDI payments

You can ask the Social Security Administration to withhold federal income tax directly from your SSDI payments each month. This way, you do not have to pay a large bill when you file your tax return. You fill out Form W-4V (Voluntary Withholding Request) and send it to your local Social Security office or submit it online through your my Social Security account.

You can choose to withhold 7%, 10%, 12%, or 22% of your payment. If you are unsure which rate to choose, the IRS Withholding Calculator can help you estimate. You can change your withholding rate at any time, or stop withholding altogether, by submitting a new Form W-4V.

Withholding is voluntary and does not change whether your SSDI is taxable — it only changes when you pay the tax. Some people prefer to withhold so they do not owe money in April. Others prefer to keep the full payment and pay the tax bill when they file.

What happens if you do not pay tax on taxable SSDI

If your SSDI is taxable and you do not pay the tax, the IRS will send you a notice. You may owe penalties and interest on top of the unpaid tax. The penalty is usually 20% of the unpaid tax, plus interest that compounds daily.

If you cannot pay the full amount, you can set up a payment plan with the IRS. You can also request an installment agreement, which lets you pay over time. Contact the IRS directly or work with a tax professional to explore your options.

Reporting SSDI on your tax return

You report SSDI on Form 1040 (the main federal tax return form). The Social Security Administration sends you a Form SSA-1099 each January showing how much SSDI you received in the previous year. Use this form to fill in the SSDI line on your return.

If you use tax software, it will guide you through entering your SSDI amount. If you file by hand or work with a tax professional, they will use the SSA-1099 to complete the return. You do not need to do any special calculation yourself — the tax software or professional handles the combined income formula.

Frequently Asked Questions

Does Supplemental Security Income (SSI) count toward the combined income threshold?

No. SSI is not included in combined income for tax purposes. If you receive both SSDI and SSI, only your SSDI and other income sources count. This is one of the few tax breaks built into the SSI program.

If I work part-time and earn wages, will my SSDI become taxable?

It depends on how much you earn. If your wages plus half your SSDI stay under $25,000 (or $32,000 if married filing jointly), your SSDI is not taxable. If you cross that threshold, some of your SSDI becomes taxable. Many people with part-time work stay under the threshold.

Can I deduct medical expenses or disability-related costs to lower my taxable income?

Medical expenses are deductible only if you itemize deductions and they exceed 7.5% of your adjusted gross income — a high bar for most people. Disability-related work expenses may be deductible under certain conditions. A tax professional can review your situation to see if any deductions apply to you.

What if I disagree with the Social Security Administration about how much SSDI I received?

Check your Form SSA-1099 against your payment records. If the amount is wrong, contact your local Social Security office or call 1-800-772-1213. Social Security can issue a corrected form if there was an error. Keep your records in case you need to show proof to the IRS.

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

If SSDI is your only income and it is below the filing threshold for your age and filing status, you do not have to file. However, filing may be worth it if you are due a refund — for example, if you had taxes withheld from your SSDI payments. The IRS website has a tool to help you determine whether you must file.