What Medicare tax is and who pays it

Medicare tax is a payroll tax that funds the Medicare program. If you work, you and your employer each pay a percentage of your wages into Medicare. If you are self-employed, you pay both the employee and employer portions yourself. The money goes into a federal trust fund that pays for hospital insurance, medical insurance, and prescription drug coverage for people 65 and older, as well as some younger people with disabilities.

You start paying Medicare tax as soon as you begin working — there is no age requirement. The tax continues throughout your working years and does not stop at any income level. Unlike Social Security tax, which has a wage cap, Medicare tax applies to all your earnings.

Key Takeaways

  • Employees pay 1.45% of wages in Medicare tax, and employers pay another 1.45%, for a total of 2.9%.
  • Self-employed people pay the full 2.9% themselves, though they can deduct half of it on their taxes.
  • High earners pay an additional 0.9% Medicare tax on income above $200,000 (single) or $250,000 (married filing jointly).
  • Medicare tax has no wage cap, so you pay it on every dollar you earn, no matter how much you make.
  • The tax you pay during your working years helps fund Medicare benefits you may receive later.

Standard Medicare tax rates for employees and employers

If you are an employee, your employer withholds 1.45% of your gross wages for Medicare tax. Your employer also pays 1.45% on your behalf — this is a separate cost to them and does not come from your paycheck. Together, these two amounts (2.9%) fund the Medicare program.

You can see the Medicare tax deduction on your pay stub listed as "Medicare" or "HI" (Hospital Insurance). It appears on every paycheck, regardless of how much you earn. There is no threshold where the tax stops — if you earn $30,000 or $300,000 in a year, you pay 1.45% on all of it.

Self-employment Medicare tax

If you are self-employed, you pay both the employee and employer portions of Medicare tax yourself. This means you pay 2.9% of your net self-employment income. You calculate this on Schedule SE (Self-Employment Tax) when you file your federal income tax return.

The IRS allows you to deduct half of your self-employment Medicare tax when you calculate your adjusted gross income. This deduction reduces your taxable income but does not reduce the amount of Medicare tax you owe. For example, if you owe $2,900 in Medicare tax, you can deduct $1,450 on your tax return.

Additional Medicare tax for high earners

If your income exceeds certain thresholds, you pay an additional 0.9% Medicare tax on the amount over the limit. For single filers, the threshold is $200,000 per year. For married couples filing jointly, it is $250,000. For married people filing separately, it is $125,000.

This additional tax applies to wages, self-employment income, and certain investment income. Your employer should withhold it automatically if your wages exceed the threshold. If you have multiple jobs or are self-employed, you may need to adjust your withholding or make estimated tax payments to cover the additional tax owed.

How Medicare tax connects to your benefits later

The Medicare tax you pay during your working years is credited toward your Medicare may be able to access. You do not need to pay a certain amount to become may be able to access — may be able to access is based on age (65 and older) or disability status. However, the amount you paid in Medicare tax can affect whether you owe a premium for Part B (medical insurance) and Part D (prescription drug coverage).

If your income during retirement is higher than a certain level, you may pay higher premiums for Part B and Part D. The IRS uses your income from two years prior to calculate this, so your earnings history matters. This is one reason why understanding your lifetime earnings record is useful — you can request a statement from Social Security to verify the income they have on file.

Where Medicare tax money goes

Medicare tax funds the Hospital Insurance Trust Fund, which pays for Part A benefits. Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health services. The trust fund is separate from the general federal budget and operates on a pay-as-you-go basis — current workers' taxes pay for current beneficiaries' care.

Part B (medical insurance) and Part D (prescription drug coverage) are funded differently. Part B is funded by a combination of beneficiary premiums and general federal revenue. Part D is funded by beneficiary premiums, federal payments, and manufacturer rebates. Understanding this distinction helps explain why your Medicare tax alone does not cover all your benefits once you turn 65.

What to ask your employer or tax preparer

If you are unsure whether the right amount of Medicare tax is being withheld from your paycheck, ask your payroll or human resources department to review your pay stub with you. They can confirm the percentage and show you where it appears each pay period.

If you are self-employed or have multiple jobs, a tax preparer or accountant can help you understand your total Medicare tax obligation and whether you need to make estimated payments. They can also explain how the additional 0.9% tax applies to your specific situation and help you plan ahead.

Frequently Asked Questions

Does Medicare tax stop when I turn 65?

No. If you continue working after 65, you still pay Medicare tax on your wages. The tax does not stop at any age as long as you are earning income from employment or self-employment.

Can I opt out of paying Medicare tax?

No. Medicare tax is mandatory for all employees and self-employed people. There are no exemptions based on age, health status, or religious belief, though some narrow exceptions exist for certain religious groups — ask your employer or a tax professional if you think you may may have access to.

What if I paid Medicare tax but never use Medicare?

Your Medicare tax contributions are part of the federal trust fund that supports the entire Medicare system. Even if you do not use Medicare benefits, your contributions help fund care for others. If you move out of the country or have other circumstances, talk to Social Security about how your record is handled.

How do I know how much Medicare tax I have paid over my lifetime?

You can create a my Social Security account at ssa.gov to view your earnings record and see how much you have paid in Medicare tax each year. This record is used to determine your may be able to access and may affect your premiums in retirement.

Is Medicare tax the same as Medicare premiums?

No. Medicare tax is the payroll tax you pay while working. Medicare premiums are what you pay for coverage once you are enrolled in Medicare at 65 or older. The two are separate costs.