When You Have to Pay Income Tax on SSDI Benefits

Whether SSDI counts as taxable income depends on your total income, not just your benefits

Social Security Disability Insurance (SSDI) is subject to federal income tax, but only if your combined income exceeds a threshold set by the IRS. Combined income includes your SSDI benefits plus other earnings, interest, dividends, and certain other sources. Most people receiving SSDI alone do not owe tax on it. But if you work part-time, have a spouse with income, or receive other benefits, you may owe tax on a portion of your SSDI.

The IRS uses a formula called the "combined income test" to determine how much of your benefit is taxable. The formula is the same whether you file as single or married filing jointly, but the income thresholds differ. For 2024, if your combined income is below $25,000 (single) or $32,000 (married filing jointly), none of your SSDI is taxable. If your combined income exceeds those thresholds, up to 85% of your benefits may be subject to tax.

Key Takeaways

SSDI becomes taxable only when your combined income (benefits plus other earnings) exceeds $25,000 for single filers or $32,000 for married filers.
Combined income includes wages, self-employment income, interest, dividends, and certain other benefits—not just SSDI itself.
If you owe tax on SSDI, you can have taxes withheld from your monthly benefit or pay estimated tax quarterly to the IRS.
The IRS Pub. 915 worksheet walks you through the calculation; most tax software includes the formula automatically.
State income tax treatment of SSDI varies: some states tax it, others do not, and a few tax it only under certain conditions.

How the IRS calculates combined income

Combined income is not the same as your SSDI benefit amount. The IRS starts with your adjusted gross income (AGI)—your wages, self-employment income, taxable interest, and taxable dividends—then adds back certain deductions and adds your SSDI benefit in full. The result is your combined income for the tax test.

For example: you receive $1,200 per month in SSDI ($14,400 per year) and earn $15,000 from part-time work. Your combined income is $29,400. Since this exceeds $25,000, some of your SSDI is taxable. The IRS then applies a two-tier formula to determine how much. The first tier taxes up to 50% of benefits if combined income exceeds the base threshold by $1 to $9,000. The second tier taxes up to an additional 35% if combined income exceeds the base threshold by more than $9,000. In this example, your combined income exceeds the threshold by $4,400, so up to 50% of your benefits—roughly $7,200—may be taxable.

The calculation is complex, and the IRS provides a worksheet in Publication 915 to walk through it. Most tax preparation software includes the formula and will calculate it for you if you enter your SSDI amount and other income sources correctly.

Work incentives that reduce taxable income

If you work while receiving SSDI, certain work incentives can reduce the income counted toward the tax threshold. The Plan to Achieve Self-Support (PASS) allows you to set aside income and resources for a work goal without affecting your SSDI payment. Money set aside under a PASS plan is not counted as income for SSDI purposes, which can also lower your combined income for tax calculations.

The Student Earned Income Exclusion excludes up to $2,110 per month (in 2024) of wages earned by a student under age 22 from SSDI income calculations. This exclusion does not directly reduce your combined income for tax purposes, but it can help you keep your SSDI benefit higher, which indirectly affects your tax situation.

If you are self-employed, you can deduct business expenses from your net self-employment income before it counts toward combined income. Work with a tax professional or your local Social Security work incentives planning and information (WIPA) project to understand how these rules interact with your specific situation.

Withholding and estimated tax payments

If you owe tax on your SSDI, you have two options: request that the Social Security Administration withhold federal income tax from your monthly benefit, or pay estimated tax to the IRS quarterly.

To request withholding, complete Form W-4V (Voluntary Withholding Request) and submit it to your local Social Security office or online through your my Social Security account. You can choose to have 7%, 10%, 12%, or 22% of your monthly benefit withheld. The amount withheld is sent to the IRS on your behalf and credited toward your annual tax liability.

If you prefer not to have taxes withheld, you can pay estimated tax directly to the IRS using Form 1040-ES. Estimated tax is due quarterly: April 15, June 15, September 15, and January 15. Underpayment penalties explore if you do not pay enough throughout the year, so calculate your estimated liability carefully or work with a tax professional.

State income tax treatment of SSDI

Federal income tax rules do not explore to state income tax. Most states do not tax SSDI benefits at all, but a handful do. Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont tax SSDI under their state income tax systems, though some explore exemptions or reduced rates for lower-income recipients.

A few states—including Illinois and Mississippi—have passed laws excluding SSDI from state taxation, but the laws may not take effect when ready or may explore only to certain tax years. Check your state's department of revenue website or ask a tax professional in your state to confirm the current rule.

If you live in a state that taxes SSDI, you will owe state income tax on the same portion of your benefit that is taxable under federal rules, unless your state has a specific exemption. Some states allow you to claim a credit or deduction for federal taxes paid on SSDI, which can reduce your state liability.

Reporting SSDI on your tax return

Social Security sends you a Form SSA-1099 each January showing the total SSDI you received in the prior year. You must report this amount on your federal tax return, even if none of it is taxable. The form goes to Box 5 of your Form 1040 (U.S. Individual Income Tax Return).

If you are filing electronically, your tax software will prompt you to enter the SSA-1099 amount and will calculate how much is taxable using the combined income formula. If you are filing by hand, use the worksheet in IRS Publication 915 to determine the taxable portion, then report that amount on line 5b of your Form 1040.

Keep a copy of your SSA-1099 for your records. If the amount shown does not match what you received, contact Social Security to request a corrected form before you file.

What happens if you do not pay tax owed on SSDI

If you owe tax on SSDI and do not pay it, the IRS will assess penalties and interest on the unpaid amount. The failure-to-pay penalty is typically 0.5% of the unpaid tax per month, up to 25%. Interest accrues daily at a rate set quarterly by the IRS (currently around 8% annually, but this changes). These charges compound, so a small unpaid tax bill can grow quickly.

If you owe back taxes, you can set up a payment plan with the IRS using Form 9465 (Installment Agreement Request) or through the IRS website. The IRS may also offset your SSDI benefit to collect the debt, though this is rare and requires a formal notice. If you cannot pay in full, contact the IRS or a tax professional to discuss your options before the important date.

Frequently Asked Questions

Do I have to file a tax return if I only receive SSDI?

Not necessarily. If SSDI is your only income and your combined income is below the tax threshold ($25,000 for single filers in 2024), you have no federal income tax filing requirement. However, you may want to file anyway if you are may have access to to a refundable tax credit like the Earned Income Tax Credit (EITC), which requires a return to claim.

If I work part-time, will my wages push my SSDI into taxable territory?

Possibly. Your combined income includes both your wages and your SSDI benefit. If the total exceeds $25,000 (single) or $32,000 (married), some SSDI becomes taxable. Work with a WIPA project or tax professional to estimate your combined income before the year ends so you can plan for withholding or estimated payments.

Can I reduce my taxable SSDI by making charitable donations?

No. Charitable donations reduce your overall taxable income, but they do not reduce your combined income for the SSDI tax test. The SSDI tax calculation uses a separate formula that does not account for deductions like charitable contributions.

What if I receive both SSDI and Supplemental Security Income (SSI)?

SSI is never taxable, but SSDI is. If you receive both, only the SSDI portion counts toward the combined income test. Social Security will show both amounts on your SSA-1099, so make sure your tax preparer understands which is which.

Do I owe tax on SSDI if I live outside the United States?

Yes, U.S. citizens and resident aliens owe federal income tax on worldwide income, including SSDI, regardless of where they live. If you live in another country that also taxes SSDI, you may owe tax in both places, though you can claim a foreign tax credit on your U.S. return to avoid double taxation.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.