Medicare is a payroll tax that funds the federal health insurance program for people 65 and older

The money taken from your paycheck for Medicare goes directly to the federal government to fund the Medicare program. You pay this tax while you work so that when you turn 65, you become covered under Medicare without having to pay the full cost upfront. It works the same way Social Security does — current workers fund current retirees.

Your employer also contributes an equal amount on your behalf. Together, these payments make up the Medicare trust funds that pay for hospital care, doctor visits, and other services for people on Medicare. The tax is mandatory for all W-2 employees and self-employed workers, regardless of whether you plan to use Medicare later.

Key Takeaways

  • Medicare tax is 2.9% of your gross wages — 1.45% from your paycheck and 1.45% from your employer.
  • If you earn over $200,000 as a single filer (or $250,000 married filing jointly), you pay an additional 0.9% Medicare tax on income above that threshold.
  • The money you pay in Medicare tax funds Part A (hospital insurance) and Part B (medical insurance) for current Medicare beneficiaries, not a personal account in your name.
  • You cannot opt out of Medicare tax, even if you have private health insurance now or plan to decline Medicare later.

How much Medicare tax comes out of your paycheck

The standard Medicare tax rate is 2.9% of your gross wages. Your employer withholds 1.45% from your paycheck, and your employer pays the other 1.45% directly to the government. If you are self-employed, you pay both portions yourself — 2.9% total — though you can deduct half of it on your tax return.

If your income exceeds certain thresholds, you pay an additional 0.9% Medicare tax on the amount over the limit. For 2024, the thresholds are $200,000 for single filers, $250,000 for married couples filing jointly, and $125,000 for married couples filing separately. Your employer withholds this extra tax automatically once you cross the threshold in a given year.

Where your Medicare tax money goes

Medicare tax funds two parts of the Medicare program: Part A (hospital insurance) and Part B (medical insurance). Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health services. Part B covers doctor visits, outpatient care, medical equipment, and preventive services.

The money does not sit in an account with your name on it. Instead, it goes into a shared trust fund that pays benefits to all people currently enrolled in Medicare. When you turn 65 and become may be able to access for Medicare, the taxes paid by current workers fund your coverage. This is a pay-as-you-go system, not a savings account.

Why you cannot opt out of Medicare tax

Medicare tax is mandatory for all W-2 employees and self-employed workers. You cannot choose to skip it, even if you have employer health insurance, a private plan, or plan to decline Medicare when you turn 65. The law requires the withholding as long as you are working and earning wages.

Some people mistakenly believe they can refuse Medicare at 65 if they paid into it while working. That is not how it works. You have the right to decline Medicare coverage when you turn 65, but the tax you paid while working still goes to the program and cannot be refunded or redirected.

What happens to your Medicare tax if you move out of the country

If you move abroad, you stop paying Medicare tax on any wages you earn outside the United States. However, if you continue to work for a U.S. employer or are self-employed with U.S. income, you still owe Medicare tax on that income.

When you turn 65, you may still be covered under Medicare even if you live outside the U.S., though your coverage options and how you receive benefits may differ. You should contact Social Security before moving to understand how your benefits and coverage will work from abroad.

The difference between Medicare tax and Medicare premiums

Medicare tax and Medicare premiums are two separate costs. The tax you pay now while working funds the program. Premiums are what you pay after you turn 65 and enroll in Medicare — they are the monthly charges for Part B (medical insurance) and Part D (prescription drug coverage) if you choose those parts.

Most people do not pay a premium for Part A because they have already paid for it through Medicare tax while working. Part B premiums vary based on income and change each year. Understanding the difference helps you plan for both the taxes you pay now and the costs you will face in retirement.

How to read your pay stub and find Medicare tax

On your pay stub, look for a line labeled "Medicare" or "FICA Medicare." It will show the amount withheld from your gross pay — usually 1.45% of your wages. If your income is high enough to trigger the additional 0.9% tax, that may appear on a separate line labeled "Additional Medicare Tax" or "Medicare Surtax."

Your pay stub also shows what your employer contributes, though that amount does not come out of your paycheck. If you are self-employed, your tax return (Form 1040 and Schedule SE) shows the full 2.9% Medicare tax you owe, plus the deduction for half of it.

Frequently Asked Questions

Can I get my Medicare tax refunded if I don't use Medicare?

No. Medicare tax is not refundable, even if you decline Medicare coverage at 65 or never use it. The money you paid in goes to the trust fund that covers current beneficiaries. If you choose not to enroll in Medicare, you straightforward do not receive benefits — the tax you paid is not returned.

What if I worked in multiple states — do I pay Medicare tax in each one?

Yes. Medicare tax is federal and applies to all wages you earn, regardless of which state you work in. You pay 1.45% (or 2.45% if you are over the income threshold) on every dollar of wages earned in any state.

Do I pay Medicare tax on tips, bonuses, or other income?

Yes. Medicare tax applies to all wages, including tips, bonuses, commissions, and other compensation. The only common exception is certain employer-provided benefits like health insurance premiums, which are pre-tax deductions.

Why does my Medicare tax seem higher some years than others?

If your income increased or you crossed the $200,000/$250,000 threshold, you owe the additional 0.9% Medicare tax on the amount over the limit. This extra tax only applies once per year, so it may appear in one paycheck or be spread across several, depending on how your employer calculates it.

If I'm self-employed, how do I pay Medicare tax?

Self-employed workers pay the full 2.9% Medicare tax (or 3.8% if income exceeds the threshold) through self-employment tax on Schedule SE of their tax return. You can deduct half of the self-employment tax on your Form 1040, which reduces your taxable income slightly.