Whether you pay tax on SSDI depends on your total income, not just your benefits

The Social Security Administration does not automatically withhold federal income tax from your SSDI check. Whether you owe tax at the end of the year depends on a calculation called combined income—which includes your SSDI, other earnings, and certain non-taxable income added back in. If your combined income exceeds a threshold (between $25,000 and $34,000 for single filers in 2024, depending on filing status), up to 85 percent of your benefits become taxable.

This is different from how most people think about income tax. You are not taxed on the full amount of your SSDI. Instead, the IRS uses a formula that only counts a portion of your benefits as income if you have other money coming in. The exact amount depends on your filing status and how much non-SSDI income you receive.

You can ask the Social Security Administration to withhold federal tax from your benefit payment each month, which makes it easier to avoid owing a large amount when you file your return. This is optional, but many people choose it to stay current with their tax obligation.

Key Takeaways

  • SSDI is only taxable if your combined income (benefits plus other earnings) exceeds $25,000 to $34,000 depending on your filing status, and even then only a portion is taxed.
  • Combined income includes your SSDI, wages, self-employment income, interest, dividends, and certain other sources, plus half of your SSDI added back in for the calculation.
  • You can request federal tax withholding from your SSDI payment by completing Form W-4V and submitting it to the Social Security Administration.
  • If you do not withhold tax during the year, you may owe when you file your return, and you should file even if you normally would not have to because of the tax-filing threshold.

How the IRS calculates taxable SSDI

The IRS uses a two-tier system to determine how much of your SSDI is taxable. The first tier applies if your combined income is between $25,000 and $34,000 (single filers) or $32,000 and $44,000 (married filing jointly). In this range, up to 50 percent of your benefits become taxable. The second tier applies if your combined income exceeds the upper threshold, and up to 85 percent of your benefits become taxable.

Combined income is calculated as your adjusted gross income plus non-taxable interest plus half of your SSDI benefits. This means that even if you have no other income, half of your SSDI is included in the formula used to determine whether you cross the threshold. For example, if you receive $20,000 in SSDI and have $5,000 in wages, your combined income is $5,000 plus $10,000 (half of $20,000), which equals $15,000. You would not owe tax because $15,000 is below the $25,000 threshold.

The actual tax you owe is calculated using a worksheet in the IRS instructions for Form 1040. The calculation is complex because it involves multiple steps and depends on which tier applies to you. Many people use tax software or a tax professional to work through it, especially if they have investment income or other sources beyond wages and SSDI.

Requesting tax withholding from your SSDI payment

You can ask the Social Security Administration to withhold federal income tax from your monthly SSDI benefit by completing Form W-4V (Voluntary Withholding Request). You choose a withholding rate—10, 15, 25, or 35 percent—and the SSA deducts that amount from your check each month. The withheld money is sent to the IRS on your behalf.

To submit Form W-4V, you can mail it to your local Social Security office, bring it in person, or upload it through your my Social Security account online. The change typically takes effect within one or two months. If you want to change your withholding rate or stop withholding altogether, you can submit a new form at any time.

Choosing a withholding rate is a personal decision. Some people withhold 10 percent to cover a small tax liability and avoid a large bill in April. Others withhold 25 or 35 percent if they have other income and expect to owe more. If you withhold too much, you will receive a refund when you file your return. If you withhold too little, you will owe when you file.

Filing your tax return when you receive SSDI

You must file a federal income tax return if your combined income exceeds the threshold for your filing status, even if no tax is withheld from your check. The threshold for filing is lower than the threshold for owing tax, so you may need to file even if you do not owe anything. For 2024, a single person with SSDI must file if their combined income exceeds $14,600.

When you file, you report your SSDI on line 5b of Form 1040 (or the equivalent line on your state return if your state taxes SSDI). The IRS worksheet then calculates how much of your benefits are taxable based on your combined income. If you withheld tax during the year, the amount you withheld is credited against your total tax liability.

If you do not file a return when you are required to, you may face penalties and interest, and you will not receive any refund you are owed. Filing is also important if you have other income sources—wages, self-employment income, or investment income—because those must be reported separately and may affect your SSDI tax calculation.

State income tax on SSDI

Most states do not tax SSDI benefits, but a few do. Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont tax SSDI under their state income tax laws. The rules vary by state—some tax SSDI the same way the federal government does (using combined income thresholds), while others have different thresholds or tax all SSDI as income.

If you live in a state that taxes SSDI, you will need to file a state return and report your benefits. Some states allow you to request withholding from your SSDI payment for state tax purposes, similar to federal withholding. Contact your state tax authority or the Social Security Administration to learn the rules in your state.

If you move to a different state, your tax situation may change. For example, if you move from a state that does not tax SSDI to one that does, you will owe state tax on your benefits starting in your first year of residency in the new state. Conversely, if you move to a state that does not tax SSDI, you will no longer owe state tax on your benefits.

SSDI and Medicare premiums

Your SSDI income affects your Medicare premiums if you are enrolled in Medicare Part B (medical insurance) or Part D (prescription drug coverage). The Social Security Administration uses your modified adjusted gross income from two years prior to determine your premium. If your income is higher, your premium is higher—a structure called Income-Related Monthly Adjustment Amounts (IRMAA).

For 2024, if your modified adjusted gross income is above $97,000 (single filers) or $194,000 (married filing jointly), you pay a higher Part B premium. The premium increases in brackets, so the higher your income, the more you pay. Part D premiums work the same way. These premiums are deducted from your Social Security check each month.

SSDI counts toward your modified adjusted gross income for IRMAA purposes, so higher benefits can push you into a higher premium bracket. This is separate from federal income tax, but it is another way your SSDI affects your overall tax and benefit situation. You can appeal an IRMAA information if your income has changed since the year used to calculate it.

Work incentives and tax withholding

If you are working while receiving SSDI, your earnings affect both your tax situation and your SSDI benefit amount. The Social Security Administration has work incentives that allow you to earn money without losing your entire benefit, including the Plan to Achieve Self-Support (PASS) and Impairment Related Work Expenses (IRWE). These reduce the amount of earnings counted against your benefit.

However, work incentives do not reduce your taxable income for federal tax purposes. If you earn wages and receive SSDI, your combined income includes both your wages and your benefits, and you may owe federal income tax even if your SSDI benefit is not reduced because of the work incentive. You should request tax withholding from both your paycheck (through your employer's Form W-4) and your SSDI payment to avoid owing a large amount at tax time.

The interaction between work incentives, SSDI benefits, and taxes is complex. A benefits planner at your local Work Incentives Planning and information (WIPA) project can help you understand how working affects your specific situation and whether you should adjust your tax withholding.

Frequently Asked Questions

Do I have to file a tax return if I only receive SSDI and no other income?

No, if your only income is SSDI and your combined income is below the filing threshold for your filing status, you do not have to file. However, if you had federal tax withheld from your SSDI payment, you should file to claim a refund of the withheld amount.

What happens if I do not withhold tax and owe money when I file?

You will owe the tax amount when you file your return. If you owe a large amount, you can request a payment plan from the IRS. To avoid this in future years, you can submit Form W-4V to request withholding from your SSDI payment.

Can I change my tax withholding rate during the year?

Yes, you can submit a new Form W-4V to the Social Security Administration at any time to change your withholding rate or stop withholding. The change typically takes effect within one or two months.

Does SSDI count as income for other benefit programs?

Yes, SSDI counts as income for means-tested programs like Medicaid and Supplemental Security Income (SSI). However, the rules vary by program and state. Contact your state Medicaid office or local SSI office to learn how SSDI affects your other benefits.

What if I disagree with the amount of tax I owe on my SSDI?

You can work with a tax professional or use IRS Form 1040 instructions to recalculate your tax liability. If you believe the Social Security Administration reported your SSDI incorrectly on Form SSA-1099, you can contact them to request a corrected form. If you disagree with the IRS calculation, you can file an amended return or contact the IRS directly.