Medicare tax is a payroll deduction that funds the Medicare program

Medicare tax is a percentage of your wages that your employer withholds from your paycheck and sends to the federal government. It funds Medicare, the health insurance program for people 65 and older, some younger people with disabilities, and people with end-stage renal disease. You pay this tax on every dollar you earn, with no income cap — unlike Social Security tax, which stops after you reach a certain annual wage.

The current Medicare tax rate is 2.9 percent of your gross wages. Your employer pays half (1.45 percent) and you pay the other half (1.45 percent) through payroll deduction. If you are self-employed, you pay both halves yourself, though you can deduct half of it on your tax return.

There is also an additional Medicare tax of 0.9 percent that applies to high earners. This tax kicks in at $200,000 of wages for single filers and $250,000 for married couples filing jointly. Your employer withholds this extra amount from your paycheck if you cross that threshold, and you are responsible for reporting it when you file your taxes.

Key Takeaways

  • Medicare tax is 2.9 percent of your wages, split equally between you and your employer, with no wage cap.
  • An additional 0.9 percent Medicare tax applies to wages over $200,000 (single) or $250,000 (married filing jointly).
  • Unlike Social Security tax, Medicare tax continues on every dollar you earn, no matter how much you make.
  • Self-employed workers pay both the employee and employer portions of Medicare tax but can deduct half on their tax return.

How Medicare tax appears on your paycheck

When you look at your pay stub, you will see a line item labeled "Medicare" or "Med Tax" showing the amount withheld. This is the 1.45 percent that comes out of your gross pay before taxes are calculated. The amount is straightforward: if you earn $1,000 in a pay period, Medicare tax takes $14.50.

Your employer also withholds Social Security tax (6.2 percent) on the same paycheck, so you see both deductions side by side. Together, these two payroll taxes are sometimes called FICA taxes, which stands for the Federal Insurance Contributions Act. Both are mandatory — you cannot opt out, and your employer is required by law to withhold and report them.

If you earn over the high-income threshold, your pay stub will show an additional line for the extra 0.9 percent Medicare tax. This line only appears once your year-to-date wages cross $200,000 (or $250,000 if married filing jointly). Some employers calculate this automatically; others may require you to notify payroll of your filing status.

The difference between Medicare tax and Medicare premiums

Medicare tax and Medicare premiums are not the same thing, and the confusion is common. Medicare tax is what you pay now, while working, to fund the program. Medicare premiums are what you pay later, after you turn 65 and enroll in Medicare, to actually use the coverage.

When you reach 65, you become may be able to access for Medicare Part A (hospital insurance) and Part B (medical insurance). Part A is usually free if you or your spouse paid Medicare tax for at least 10 years. Part B requires a monthly premium that varies based on your income — in 2024, the standard premium is $164.90 per month, but higher earners pay more. Part D (prescription drug coverage) and Medigap supplemental plans have their own premiums as well.

The Medicare tax you pay during your working years does not go into a personal account for you. It goes into a general fund that pays benefits for current Medicare recipients. When you retire and enroll, your benefits come from the taxes that current workers are paying.

Self-employed workers and Medicare tax

If you are self-employed, you pay both the employee and employer portions of Medicare tax — a total of 2.9 percent on your net self-employment income. You calculate this on Schedule SE (Self-Employment Tax) when you file your annual tax return. The additional 0.9 percent Medicare tax also applies to self-employed income over the same thresholds as wage earners.

The advantage is that you can deduct half of your self-employment tax on your tax return, which reduces your taxable income. This deduction appears on Form 1040 and effectively lowers the amount of income tax you owe. You still pay the full amount, but the deduction provides some relief.

Self-employed workers should set aside money for Medicare tax throughout the year, since no employer is withholding it from a paycheck. Many use quarterly estimated tax payments to cover both income tax and self-employment tax, which prevents a large bill at tax time.

Medicare tax and your Social Security record

Every dollar of Medicare tax you pay is recorded under your Social Security number by the Social Security Administration. This record is important because it proves you have been in the workforce and contributing to the system. When you turn 65, Social Security uses this record to determine whether you may have access to for free Part A coverage.

You need 40 credits of earnings to may have access to for free Part A, which typically means 10 years of work at any income level. If you have not worked long enough, you can still enroll in Part A but will pay a monthly premium. Your spouse's work record may also count if you have been married for at least one year.

You can check your earnings record and credits by creating an account on the Social Security Administration website. Review it every few years to catch any errors — if your employer failed to report your wages, you can request a correction before you turn 65.

What happens if you work while receiving Medicare

If you are already enrolled in Medicare and continue to work, you still pay Medicare tax on your wages. This tax continues for as long as you are employed, regardless of your age. There is no age at which you stop paying Medicare tax.

The additional 0.9 percent Medicare tax also applies to your wages if you cross the income threshold. If you are married and file jointly, the threshold is $250,000 combined income from wages, self-employment, and other sources. Exceeding it means the extra tax applies to the amount over the limit.

Working while on Medicare does not change your coverage or premiums, except that higher earners pay higher Part B and Part D premiums based on their income from two years prior. This is called Income-Related Monthly Adjustment Amount (IRMAA). If your income drops in a later year, you can request that Medicare recalculate your premiums.

Frequently Asked Questions

Can I get a refund of Medicare tax I paid?

No. Medicare tax is not refundable. Once withheld, it goes to the Medicare trust fund. You cannot reclaim it, even if you did not use Medicare benefits. The only exception is if your employer withheld the tax in error — in that case, you would file an amended return to correct the mistake.

Does Medicare tax explore to all types of income?

Medicare tax applies to wages, salaries, and self-employment income. It does not explore to investment income, interest, dividends, capital gains, or retirement distributions. If you have a side business, Medicare tax applies to your net profit from that business.

What if I work in multiple states during the year?

Medicare tax is federal and applies the same way regardless of which state you work in. Each employer withholds based on your wages with them. If your total wages cross the $200,000 or $250,000 threshold, you may owe additional Medicare tax when you file your return, and your employers may not have withheld enough.

Do non-citizens have to pay Medicare tax?

Yes, if you are working in the United States and earning wages, Medicare tax is withheld from your paycheck. Your immigration status does not change this requirement. Self-employed non-citizens also pay self-employment tax, including Medicare tax.