Medicare tax funds the program you'll use in retirement
You pay Medicare tax while you work because the money goes into a trust fund that pays for hospital care, doctor visits, and other medical services for people over 65 and some younger people with disabilities. The tax you pay now helps cover the costs of current retirees' care — and later, when you turn 65, the Medicare tax paid by workers at that time will help cover yours.
This is how Social Security and Medicare were designed to work: each generation of workers funds the generation ahead of them. The system depends on this steady flow of money from paychecks into the trust funds.
Key Takeaways
- Medicare tax is a payroll tax that funds hospital insurance (Part A) and is split between you and your employer, with each paying 1.45 percent of your wages.
- You pay Medicare tax on all your wages with no income cap, unlike Social Security tax, which stops after you earn a certain amount each year.
- Self-employed people pay both the employee and employer share of Medicare tax, totaling 2.9 percent of their net earnings.
- Higher earners pay an additional 0.9 percent Medicare tax on wages above $200,000 (single) or $250,000 (married filing jointly).
- The money you pay in Medicare tax goes into the Hospital Insurance Trust Fund, which pays for inpatient hospital stays, skilled nursing care, hospice, and home health services.
How much Medicare tax you pay
If you are an employee, your employer withholds 1.45 percent of your gross pay for Medicare tax. Your employer also pays 1.45 percent on your behalf — you do not see this amount deducted, but it is part of your total compensation cost to them. Together, these two amounts equal 2.9 percent of your wages going into Medicare.
There is no wage cap on Medicare tax, which means you pay it on every dollar you earn, no matter how much you make in a year. This is different from Social Security tax, which stops once you reach a certain earnings threshold (that threshold changes each year).
If you are self-employed, you pay both the employee and employer portions yourself: 2.9 percent of your net self-employment income. You can deduct half of this amount when you file your taxes, but you still owe the full 2.9 percent.
The additional Medicare tax for higher earners
If your wages exceed $200,000 in a year (or $250,000 if you are married filing jointly, or $125,000 if married filing separately), you pay an additional 0.9 percent Medicare tax on the amount over that threshold. Your employer is required to withhold this extra tax once you cross the income limit.
This additional tax was added in 2013 as part of the Affordable Care Act and applies to both employees and self-employed people. Self-employed individuals calculate and pay this tax when they file their annual tax return.
Where your Medicare tax money goes
Your Medicare tax payments go into the Hospital Insurance Trust Fund, which is separate from the fund that pays for doctor visits and outpatient care (Part B). The Hospital Insurance Trust Fund pays for inpatient hospital stays, skilled nursing facility care after a hospital stay, hospice services, and home health services.
The trust fund operates on a pay-as-you-go basis: the money coming in from current workers' taxes pays the bills for current beneficiaries. The Social Security Administration and Centers for Medicare & Medicaid Services (CMS) manage these funds and publish annual reports on their status.
Why Medicare tax exists as a separate payroll tax
Medicare was created in 1965 as a separate program from Social Security, so it has its own dedicated tax. Congress designed it this way to keep Medicare funding distinct and to make the cost of the program visible on your paycheck. You can see exactly how much you and your employer are paying for this benefit.
This structure also means Medicare can be adjusted independently of Social Security if Congress changes the tax rate or the income threshold. Over the decades, the tax rate has been adjusted several times to keep the Hospital Insurance Trust Fund solvent as medical costs have risen.
What happens to the trust fund if too many people retire
The Hospital Insurance Trust Fund faces a long-term challenge: as more people turn 65 and fewer workers are paying in relative to the number of beneficiaries, the fund's reserves can shrink. The Social Security Administration publishes annual trustee reports that project when the fund's reserves may be depleted if no changes are made.
If reserves are depleted, the fund can still collect incoming Medicare tax, but it may not be enough to pay all bills in full. Congress would need to act — either by raising the tax rate, raising the income threshold, adjusting benefits, or some combination — to keep the program fully funded. These are policy decisions, not automatic changes.
How to see your Medicare tax on your pay stub
Your pay stub shows Medicare tax as a line item, usually labeled "Medicare" or "Med Tax." It should show 1.45 percent of your gross pay (or more if you earn over the additional tax threshold). If you are self-employed, you report Medicare tax on Schedule SE when you file your federal income tax return.
You can also see your lifetime Medicare tax contributions on your Social Security Statement, which you can view online at ssa.gov. This statement shows your estimated benefits and the total amount you have paid into Social Security and Medicare over your working years.
Frequently Asked Questions
Can I opt out of paying Medicare tax?
No. Medicare tax is a mandatory payroll tax for all employees and self-employed people. There is no option to decline it or redirect the money elsewhere. It is withheld automatically from paychecks and is required by federal law.
Do I pay Medicare tax after I turn 65 and start receiving Medicare?
Yes. If you continue working after 65, you still pay Medicare tax on your wages. The only exception is if you have no earned income — if you are retired and living on savings or investments, you do not pay Medicare tax because there are no wages to tax.
What if I worked in another country — does that time count toward Medicare?
Generally, only earnings in the United States count toward Medicare. However, some countries have agreements with the U.S. that allow work credits to transfer. You can contact Social Security to ask whether your foreign work history affects your Medicare coverage.
Is Medicare tax the same as Medicare premiums?
No. Medicare tax is the payroll tax you pay while working. Medicare premiums are the monthly costs you pay after you turn 65 and enroll in Medicare. The tax funds the program; the premiums are what you pay to use it as a beneficiary.
Why do I pay Medicare tax if I might not live to use it?
Medicare tax is a social insurance program, meaning it spreads risk across the entire working population. Not everyone who pays in will use every benefit, but the system ensures that those who do need hospital care have it covered. Your payments also help current retirees and people with disabilities who are on Medicare now.