Medicare and Social Security income counts toward your federal taxes, but the rules differ between the two programs

Social Security benefits are sometimes taxable as federal income, depending on your total income for the year. Medicare premiums are not taxable income themselves, but they reduce the amount of Social Security you receive — which can affect your tax calculation. The key difference: Social Security is income that the IRS counts; Medicare is a deduction from that income before you see the money.

Whether you owe federal tax on Social Security depends on your "combined income," a figure the IRS calculates by adding your adjusted gross income, tax-exempt interest, and half of your Social Security benefits. If that combined income exceeds certain thresholds, up to 50 percent or 85 percent of your benefits become taxable. Medicare Part B and Part D premiums come out of your Social Security check automatically, so they reduce the gross amount you receive — but they do not reduce your taxable income for federal purposes.

Key Takeaways

  • Social Security benefits may be taxable if your combined income (adjusted gross income plus half your Social Security) exceeds $25,000 for single filers or $32,000 for married couples filing jointly.
  • Medicare Part B and Part D premiums are deducted from your Social Security payment before you receive it, but the IRS still counts the full gross benefit as income.
  • Up to 50 percent of your Social Security can be taxed if you are above the first threshold, or up to 85 percent if you are above the second threshold.
  • You may owe federal tax even if you do not receive a W-2 or 1099 form, because Social Security sends a 1099-SSA-B statement instead.

How Social Security is taxed at the federal level

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

The second tier applies if your combined income exceeds $34,000 (single) or $44,000 (married filing jointly). At this level, up to 85 percent of your benefits become taxable. The exact percentage depends on how far above the threshold you are. These thresholds have not changed since 1984, so more beneficiaries fall into the taxable range each year as incomes rise.

If your combined income is below $25,000 (single) or $32,000 (married filing jointly), none of your Social Security is taxable. This is the only situation where you owe no federal tax on Social Security, regardless of how much you receive in benefits.

What counts as income for the Social Security tax calculation

Combined income includes wages, self-employment income, interest, dividends, capital gains, and distributions from retirement accounts like IRAs and 401(k)s. It also includes half of your Social Security benefits themselves. This creates a circular calculation: the amount of Social Security that is taxable depends partly on how much Social Security you receive.

Tax-exempt interest — such as interest from municipal bonds — counts toward combined income for this calculation, even though it is not taxable as regular income. Distributions from Roth IRAs do not count, but distributions from traditional IRAs do. If you are still working and receiving Social Security, your wages count in full.

Medicare premiums do not reduce your combined income. Even though Part B and Part D premiums are deducted from your Social Security check, the IRS counts the full gross amount of your benefit before those deductions.

Medicare premiums and how they affect your tax situation

Medicare Part B and Part D premiums are withheld directly from your Social Security payment. For 2024, the standard Part B premium is $164.90 per month, though higher-income beneficiaries pay more through Income-Related Monthly Adjustment Amounts (IRMAA). Part D premiums vary by plan but average around $30 to $40 per month.

These premiums reduce the net amount of Social Security you receive, but they do not reduce your taxable income. If you receive $1,500 in gross Social Security and $165 in Part B premiums are deducted, you take home $1,335 — but the IRS counts $1,500 when calculating whether your benefits are taxable. This means Medicare premiums can indirectly increase your tax burden by keeping your combined income higher.

If you are on Medicare but not yet receiving Social Security, or if you pay Part B premiums outside of Social Security (through a bill from Medicare), those out-of-pocket payments do not reduce your taxable income either. Medicare premiums are not tax-deductible.

How to report Social Security on your federal tax return

Social Security sends you a Form 1099-SSA-B by January 31 each year, showing the gross amount of benefits you received in the prior year. You report this on Schedule 1 (Form 1040) and then use a worksheet in the instructions to calculate how much is taxable. The IRS provides a detailed worksheet in Publication 915, which walks you through the combined income calculation step by step.

If you use tax software, it will usually ask you to enter your Social Security amount and other income, then calculate the taxable portion automatically. If you file by hand or with a tax preparer, bring your 1099-SSA-B and any statements showing Medicare premiums paid, retirement account distributions, and other income sources.

You do not have to file a federal tax return if your income is below the filing threshold for your age and filing status — but if any of your Social Security is taxable, you should file anyway to report it accurately. Filing also allows you to claim any refundable credits you may be due.

Withholding and estimated tax payments

You can ask Social Security to withhold federal income tax from your benefits. To do this, complete Form W-4V 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 percent of your gross benefit withheld each month.

Many beneficiaries use withholding to avoid a large tax bill at the end of the year. If you have other income sources — such as a pension, part-time work, or retirement account distributions — you may need to withhold more than 22 percent or make quarterly estimated tax payments using Form 1040-ES.

If you do not withhold enough during the year, you may owe tax when you file. The IRS does not charge a penalty for underpayment if you withhold at least 90 percent of your current year tax or 100 percent of your prior year tax (110 percent if your prior year adjusted gross income was over $150,000).

State income tax on Social Security and Medicare

Most states do not tax Social Security benefits, but a handful do. Currently, Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont tax some or all Social Security benefits. The rules vary by state — some tax only benefits above a certain income level, while others exempt benefits for residents over a certain age.

Medicare premiums are not deductible on state returns either, with rare exceptions. If you live in a state that taxes Social Security, contact your state tax authority or check your state's tax forms to see whether you owe state tax on your benefits. Some states offer credits or exemptions for older adults that may reduce or eliminate the tax.

Frequently Asked Questions

Will I owe federal tax if I only receive Social Security and no other income?

Only if your combined income exceeds $25,000 (single) or $32,000 (married filing jointly). Combined income includes half your Social Security, so you would need gross benefits above $50,000 (single) or $64,000 (married) to be taxable. Most beneficiaries with only Social Security do not owe federal tax.

Does Medicare Part A have a premium that affects my taxes?

Most people do not pay a Part A premium because they or their spouse paid Medicare taxes while working. If you do pay a Part A premium, it is deducted from your Social Security the same way Part B is — it reduces your net payment but not your taxable income for federal purposes.

Can I deduct Medicare premiums on my tax return?

No. Medicare premiums are not tax-deductible, even if you pay them out of pocket. The only exception is if you are self-employed and pay for your own health insurance — you may be able to deduct that, but not Medicare premiums specifically.

What if I worked part-time last year and also received Social Security?

Your wages count as income in the combined income calculation. If your wages plus half your Social Security exceed the threshold, some of your benefits become taxable. You will receive a W-2 for your wages and a 1099-SSA-B for your benefits — report both on your tax return.

Do I need to file a tax return if I only owe tax on Social Security?

You should file if any of your Social Security is taxable, even if your total tax owed is small. Filing ensures the IRS has an accurate record and allows you to claim credits or request a refund if you overpaid through withholding.