SSDI is not counted in MAGI for most tax purposes, but the rules depend on which program is checking your income

Modified Adjusted Gross Income (MAGI) is the income figure used to determine whether you may have access to for certain federal programs and tax benefits. Social Security Disability Insurance (SSDI) payments are not included in MAGI for most purposes — but there is an important exception that affects Medicare and Medicaid recipients.

The confusion arises because different federal programs use different definitions of income. The IRS, the Centers for Medicare & Medicaid Services (CMS), and state Medicaid agencies do not all count the same things. SSDI is excluded from MAGI when you are explore for tax credits, subsidies, or means-tested programs like the Affordable Care Act (ACA) marketplace insurance. However, when you receive both SSDI and Medicare, a separate income test called Modified Adjusted Gross Income for Medicare purposes may include SSDI in certain circumstances — and that affects your Medicare premiums.

Key Takeaways

  • SSDI is not counted in MAGI for ACA marketplace insurance, tax credits, or most federal benefit programs.
  • When calculating Medicare premiums, CMS uses a different MAGI definition that may include SSDI in specific situations involving unearned income.
  • Medicaid rules vary by state; some states count SSDI as income for Medicaid purposes, while others do not.
  • The year that matters for MAGI calculations is usually two years before the current year, so 2024 income affects 2026 determinations.
  • If you have other income sources — wages, pensions, investment income — those are always counted in MAGI, regardless of SSDI.

Why SSDI is excluded from MAGI for most programs

Congress designed SSDI as a replacement income for workers who cannot work due to disability. Because it replaces wages rather than adding to them, federal law treats SSDI differently from other income sources when calculating MAGI. The Internal Revenue Code specifically excludes SSDI from gross income for tax purposes, which flows through to MAGI calculations used by the IRS and other agencies that rely on IRS definitions.

This exclusion matters most when you are explore for ACA marketplace health insurance, premium tax credits, or cost-sharing reductions. If your only income is SSDI, your MAGI is zero for these purposes, which may make you ineligible for subsidies (because you fall below the income floor) or may be able to access for Medicaid instead, depending on your state. If you have wages or other income in addition to SSDI, only the non-SSDI income counts toward MAGI.

The same exclusion applies to Supplemental Security Income (SSI), which is a separate needs-based program. Neither SSDI nor SSI is counted in MAGI for federal tax purposes or for most federal benefit programs.

The Medicare premium exception: when MAGI includes SSDI

Medicare has its own income test for determining whether you pay standard premiums or higher Income-Related Monthly Adjustment Amounts (IRMAA). CMS uses a version of MAGI that can include SSDI under specific conditions. The rule applies when you have unearned income — income that is not from wages — and SSDI is counted as unearned income in this context.

Here is the practical effect: if you receive SSDI and also have investment income, pension income, or other unearned income, CMS adds your SSDI to that other unearned income to calculate your Medicare MAGI. If that total exceeds the income thresholds (which vary by filing status and change yearly), you pay higher Medicare Part B and Part D premiums. For 2024, the thresholds start at $97,000 for single filers and $194,000 for married couples filing jointly, but these amounts increase each year.

This is a different rule from the ACA marketplace or tax credit calculations. It exists because Medicare is a program you have already paid into through payroll taxes, and CMS uses income to determine how much of the program's cost you should bear based on your current financial situation.

State Medicaid rules: SSDI treatment varies

Medicaid is jointly funded by the federal government and the states, and each state sets its own income limits and rules for what counts as income. Some states treat SSDI as countable income for Medicaid purposes; others do not. This variation is one reason why a person on SSDI might may have access to for Medicaid in one state but not another.

SSI recipients in most states are automatically may be able to access for Medicaid (called "SSI-linked" Medicaid), and in those cases SSDI is not counted because SSI itself is the pathway to Medicaid. However, SSDI recipients who do not receive SSI must meet their state's Medicaid income limit, and whether SSDI counts toward that limit depends on state law.

To find out how your state treats SSDI for Medicaid purposes, contact your state Medicaid agency or your local Social Security office. The answer affects whether you can stay on Medicaid if your SSDI payment increases or if you return to work and earn wages.

How the lookback period affects MAGI calculations

MAGI is usually calculated using income from two years before the current year. For 2024 determinations, programs look at your 2022 income. For 2025 determinations, they look at 2023 income. This lookback period means that a change in your SSDI payment or other income does not when ready affect your MAGI-based benefits.

This delay can work in your favor or against you. If your SSDI payment increased in 2024, that increase does not affect your 2024 ACA marketplace premiums or tax credits — it affects 2026. Conversely, if you earned wages in 2023 and then stopped working in 2024, your 2024 MAGI is still based on 2022 income, not your current situation. Some programs allow you to report a change in circumstances and recalculate mid-year, but you must request it.

Other income sources that always count in MAGI

While SSDI is excluded, other income sources are always included in MAGI calculations:

  • Wages and self-employment income — all earnings from work count fully.
  • Pension and annuity income — retirement income from pensions, IRAs, and 401(k) withdrawals count.
  • Investment income — interest, dividends, capital gains, and rental income count.
  • Alimony received — counts in MAGI for most purposes.
  • Taxable Social Security benefits — if you receive retirement or survivor benefits and they are taxable, they count in MAGI.
  • Unemployment benefits — count in MAGI.

If you receive both SSDI and taxable Social Security retirement benefits (for example, as a widow or widower), only the retirement portion counts in MAGI, not the SSDI portion. The Social Security Administration issues a Form SSA-1099 that separates these amounts.

What to do if you are unsure whether SSDI counts for a specific program

Because different programs use different income definitions, the safest approach is to ask the program directly. When you explore for ACA marketplace insurance, Medicaid, a tax credit, or any other benefit, the process will ask for your income. At that point, you can ask whether SSDI is counted. Most applications have a help line or online chat option.

If you are already receiving a benefit and your SSDI payment changes, contact the program to ask whether you need to report the change. Some programs do not require notification of SSDI changes because they do not count SSDI; others do because they use a different income definition.

Keep copies of your Social Security statements and any Form SSA-1099 you receive. These documents show exactly what you received and help you answer income questions accurately.

Frequently Asked Questions

If I only receive SSDI and no other income, what is my MAGI for ACA marketplace insurance?

Your MAGI is zero for ACA purposes because SSDI is not counted. This may make you ineligible for premium tax credits (which require some income) but may make you may be able to access for Medicaid instead, depending on your state's rules and the current year's federal poverty level.

Does SSDI count toward the income limit for Medicaid in all states?

No. Some states count SSDI as income for Medicaid purposes; others do not. Contact your state Medicaid agency to find out your state's rule. If you receive SSI, you are usually automatically may be able to access for Medicaid regardless of SSDI.

If my SSDI payment increases, will my ACA marketplace premiums go up when ready?

No. ACA premiums are based on income from two years prior. An SSDI increase in 2024 affects your 2026 premiums, not your 2024 or 2025 premiums. You can report a change in circumstances to recalculate mid-year if you request it.

Does SSDI count in MAGI for Medicare premium calculations?

SSDI can count in MAGI for Medicare purposes if you have other unearned income (pensions, investments, etc.). If SSDI plus other unearned income exceeds the annual threshold, you pay higher Medicare Part B and Part D premiums. Wages do not trigger this surcharge.

If I receive both SSDI and Social Security retirement benefits, how much counts in MAGI?

Only the taxable portion of your Social Security retirement benefits counts in MAGI. SSDI never counts. Your Form SSA-1099 shows which portion is taxable. Ask the Social Security Administration if you are unsure which benefit is which.