Social Security and Medicare do not directly change your tax bracket, but they can push you into a higher one

Your tax bracket is determined by your total income for the year. Social Security benefits and Medicare premiums are treated differently by the IRS, and understanding the difference matters because it affects how much federal income tax you owe.

Social Security benefits themselves are not automatically taxed. However, the IRS counts a portion of your benefits as income when calculating whether you have crossed into a higher tax bracket. This is called "combined income," and it includes your wages, pensions, investment income, and up to 85 percent of your Social Security benefits. If your combined income is high enough, you will owe federal income tax on some of your Social Security.

Medicare premiums work differently. The standard Part B and Part D premiums are deducted directly from your Social Security check before you receive it, so they do not count as income and do not affect your tax bracket at all. If you pay premiums separately, they still do not count as taxable income.

Key Takeaways

  • Social Security benefits count toward your combined income for tax purposes, which can push you into a higher tax bracket even though the benefits themselves are not automatically taxed.
  • Medicare premiums deducted from your Social Security check do not count as income and do not affect your tax bracket.
  • The IRS counts up to 85 percent of your Social Security benefits as income when determining whether you owe tax on those benefits.
  • You may owe federal income tax on your Social Security benefits if your combined income exceeds certain thresholds that vary based on your filing status.
  • State income tax rules for Social Security vary — some states do not tax Social Security at all, while others follow federal rules.

How the IRS counts Social Security in your income

The IRS uses a formula called "combined income" to decide whether your Social Security is taxable. Combined income is the sum of your adjusted gross income (AGI), any tax-exempt interest you earned, and 50 percent of your Social Security benefits.

If your combined income falls below a certain threshold, none of your Social Security is taxed. These thresholds depend on your filing status. For a single filer in 2024, the first threshold is $25,000. For married filing jointly, it is $32,000. If you are married filing separately, the threshold is $0 — meaning you will almost certainly owe tax on some of your benefits.

If your combined income exceeds the first threshold but stays below a second threshold ($34,000 for single filers, $44,000 for married filing jointly), you may owe tax on up to 50 percent of your benefits. If your combined income exceeds the second threshold, you may owe tax on up to 85 percent of your benefits.

This means a person with $30,000 in pension income and $20,000 in Social Security could owe tax on part of the Social Security, even though the Social Security itself is not automatically taxed. The combination of the two pushed the total income high enough to trigger taxation.

Medicare premiums and your tax bracket

Standard Medicare Part B premiums and Part D (prescription drug) premiums are usually deducted directly from your Social Security payment. When this happens, the premiums do not count as income and do not affect your tax bracket or your combined income calculation.

If you do not receive Social Security or if your Social Security is not enough to cover the premium, you pay Medicare directly. In that case, the premium is still not deductible and does not reduce your taxable income. It comes out of your bank account after taxes have already been calculated.

Income-related monthly adjustment amounts (IRMAA) are different. These are higher premiums that some higher-income beneficiaries pay for Part B and Part D. IRMAA is based on your modified adjusted gross income from two years prior, and it can be substantial. However, IRMAA itself is not a tax deduction — it is a premium you pay to Medicare. It does not lower your taxable income or change your tax bracket.

When you might owe tax on Social Security

You might owe federal income tax on your Social Security if your combined income exceeds $25,000 (single) or $32,000 (married filing jointly). Common situations that trigger this include having a pension from a job where you did not pay Social Security taxes, earning investment income, or working part-time in retirement.

The amount of tax you owe is not the same as your tax bracket. The IRS uses a separate calculation to determine how much of your Social Security is taxable, and then applies your regular tax bracket to that amount. A person in the 12 percent tax bracket might owe tax on 50 percent of their Social Security benefits, meaning 6 percent of the benefits become taxable income.

You do not automatically owe tax just because you receive Social Security. You only owe tax if your combined income is high enough. Many people who receive Social Security have no federal income tax liability at all.

State income tax and Social Security

Federal tax rules and state tax rules are separate. Some states do not tax Social Security income at all, regardless of how much combined income you have. Other states follow the federal rules closely. A few states have their own thresholds that differ from federal thresholds.

If you live in a state with income tax, contact your state tax authority or a tax preparer who knows your state's rules. The state where you live when you file your return is the state that applies, even if you moved during the year or receive income from another state.

How to report Social Security on your tax return

Social Security benefits appear on a form called the SSA-1099, which you receive by January 31 each year. This form shows the total benefits you received in the previous year. You do not report this amount directly as income on your Form 1040. Instead, you use a worksheet to calculate how much of your benefits are taxable, then report only the taxable portion.

If you use tax software or work with a tax preparer, they will ask you for the amounts from your SSA-1099 and any other income sources. The software or preparer will calculate the taxable portion of your benefits automatically. You do not have to do the calculation yourself.

If you think you will owe tax on your Social Security, you can ask the Social Security Administration to withhold federal income tax from your benefits. This works the same way as withholding from a paycheck — money is set aside each month and sent to the IRS. You request withholding by completing Form W-4V and submitting it to your local Social Security office.

What to ask your doctor or tax professional

If you are newly retired or about to start Social Security, ask your tax preparer or accountant how your specific income sources will affect your combined income and whether you will owe tax on your benefits. Bring documentation of all income: pensions, investments, rental income, and the estimate of your Social Security benefit.

If you are concerned about IRMAA and higher Medicare premiums, ask your Medicare counselor or Social Security representative how your income is calculated for IRMAA purposes. The calculation uses modified adjusted gross income from two years prior, so changes in your income now will not affect your premiums until two years later.

If you receive Social Security and have questions about whether you should request tax withholding, ask your tax preparer whether withholding makes sense for your situation. Some people prefer to pay estimated taxes quarterly instead, while others prefer to owe a small amount at tax time.

Frequently Asked Questions

Will getting Social Security push me into a higher tax bracket?

Social Security can increase your combined income enough to trigger taxation on your benefits, but it does not automatically push you into a higher tax bracket for other income. However, if your combined income is high enough, you may owe tax on up to 85 percent of your benefits, which effectively increases your total taxable income and could move you into a higher bracket.

Do I have to pay income tax on all of my Social Security?

No. You may owe tax on up to 85 percent of your benefits, but only if your combined income exceeds certain thresholds. Many people who receive Social Security owe no federal income tax on it at all. The amount that is taxable depends on your other income sources.

Can I deduct my Medicare premiums from my taxes?

No. Medicare premiums are not tax-deductible. If they are deducted from your Social Security check, they reduce the amount you receive but do not reduce your taxable income. If you pay them separately, they come from after-tax money.

What is the difference between combined income and my tax bracket?

Your tax bracket is the percentage rate applied to your taxable income. Combined income is a separate calculation the IRS uses only to determine whether your Social Security is taxable. You can be in the 12 percent tax bracket and still have combined income high enough to owe tax on 85 percent of your Social Security.

If I move to a different state, do I have to follow new tax rules?

Yes. The state where you live on December 31 of the tax year is the state whose rules explore to your return. If you moved during the year, you may need to file returns in both states, but only your new state's rules explore to your Social Security income for that year.