Medicare tax pays for a program you may use later, and the law requires employers and workers to fund it now

Medicare tax is a payroll deduction that funds the Medicare program — the federal health insurance system for people 65 and older, some younger people with disabilities, and people with end-stage renal disease. You pay it because Congress set up Medicare as a pay-as-you-go system: current workers fund current retirees, and when you retire, future workers will fund your coverage. The tax is mandatory for almost all workers in the United States, whether you plan to use Medicare or not.

The money you pay does not go into a personal account with your name on it. Instead, it flows into the Medicare trust funds, which pay doctors, hospitals, and other providers for care given to Medicare beneficiaries right now. This is different from a savings account — it is a shared pool that supports the entire program.

Key Takeaways

  • You pay Medicare tax because the law requires it; the rate is 1.45 percent of your wages, and your employer pays an equal 1.45 percent.
  • The money you pay does not sit in an account for your future use — it funds Medicare benefits for current retirees and disabled beneficiaries.
  • Self-employed people pay both the worker and employer portions, totaling 2.9 percent of net earnings.
  • High earners pay an additional 0.9 percent Medicare tax on income above a threshold, which funds a separate pool.
  • You cannot opt out of Medicare tax, even if you do not plan to use Medicare or if you have private insurance.

How much Medicare tax you pay and who collects it

If you are a wage earner, your employer withholds 1.45 percent of your gross pay for Medicare tax. Your employer also pays 1.45 percent on your behalf — a total of 2.9 percent of your wages goes to Medicare. This withholding happens automatically; you do not have to do anything to make it occur.

If you are self-employed, you pay both portions yourself: 2.9 percent of your net self-employment income goes to Medicare tax. You pay this when you file your annual tax return, usually in April. Self-employed people can deduct half of their Medicare tax as a business expense, which slightly reduces the net cost.

If you earn more than a certain amount — $200,000 for single filers, $250,000 for married couples filing jointly — you pay an additional 0.9 percent Medicare tax on the income above that threshold. This extra tax was added in 2013 and funds a separate part of Medicare. Unlike the base 1.45 percent, this additional tax does not have a matching employer contribution.

Where the money goes: the two Medicare trust funds

Medicare tax revenue flows into two trust funds: the Hospital Insurance Trust Fund (Part A) and the Supplementary Medical Insurance Trust Fund (Part B). Part A covers inpatient hospital care, skilled nursing facilities, hospice, and some home health services. Part B covers doctor visits, outpatient care, medical equipment, and preventive services.

The Hospital Insurance Trust Fund is funded almost entirely by Medicare tax. When you pay 1.45 percent, that money goes directly to Part A. Part B is funded partly by Medicare tax and partly by general federal income tax revenue and beneficiary premiums. The additional 0.9 percent tax on high earners goes to Part B.

The money collected in any given year does not stay in reserve. It is spent almost when ready to pay for care provided to the roughly 67 million Medicare beneficiaries currently enrolled. If you are working now, your Medicare tax is paying for your parents' or grandparents' doctor visits, hospital stays, and prescriptions.

Why you cannot opt out, even if you have other insurance

Medicare tax is not optional. The law requires nearly all employers to withhold it, and nearly all workers to pay it. You cannot choose to skip Medicare tax because you have private insurance through your job, because you are young and do not think you will need it, or because you plan to retire abroad.

The only workers who do not pay Medicare tax are certain government employees hired before 1983 who are covered by their own pension systems, and some religious groups that have obtained exemptions. Almost everyone else — including independent contractors, gig workers, and part-time employees — must pay.

If you work and do not pay Medicare tax, your employer faces penalties and you face back taxes and interest if the gap is discovered. The IRS treats unpaid Medicare tax the same as unpaid income tax.

The difference between what you pay and what you receive

Most people who reach 65 and enroll in Medicare receive far more in benefits than they paid in Medicare tax over their working years. A person who worked for 40 years and paid Medicare tax the whole time typically receives their lifetime contributions back within the first few years of Medicare coverage, especially if they use hospital services.

This is by design. Medicare is a social insurance program, not an investment account. Some beneficiaries use more than they paid in; others use less. The program spreads the cost across the entire working population to may support that older and disabled people have access to health coverage regardless of their medical history or ability to pay premiums.

Because Medicare is funded on a pay-as-you-go basis, the program depends on a steady stream of workers paying in. As the population ages and fewer workers support each retiree, the trust funds face long-term pressure. Congress periodically adjusts the tax rate, the wage base, or benefits to keep the program solvent, but these changes require legislation.

What happens to your Medicare tax if you move or stop working

Your Medicare tax record follows you throughout your working life. The Social Security Administration tracks how much you paid and for how long. When you turn 65, this record determines whether you have paid enough to may have access to for Part A (hospital insurance) without paying a monthly premium.

If you stop working before 65, you stop paying Medicare tax, but the credits you earned remain on your record. You need 40 credits (roughly 10 years of work) to may have access to for Part A at 65. If you have fewer than 40 credits, you can still enroll in Part B and Part D (prescription drug coverage), but you will pay a higher premium for Part A.

If you move to another country, you still pay Medicare tax while you are working in the United States. Once you are retired and living abroad, you can still use Medicare benefits, though coverage is limited outside the U.S. — Medicare generally does not pay for care received in other countries.

How Medicare tax changed over time

When Medicare began in 1965, the tax rate was 0.35 percent on both the worker and employer. The rate has increased several times as the program expanded and costs rose. In 1985, it reached 1.35 percent. In 1992, it became 1.45 percent, where it has remained for the base tax.

The additional 0.9 percent tax on high earners was added in 2013 as part of the Affordable Care Act. Before that, there was no cap on Medicare tax — it applied to all wages no matter how high. Now the base 1.45 percent applies to all wages, but the additional 0.9 percent only applies to income above the threshold.

Congress has the power to change the Medicare tax rate at any time. Proposals to adjust the rate or the wage base are part of ongoing debates about how to fund Medicare long-term, but no changes have been enacted since 2013.

Frequently Asked Questions

Can I get my Medicare tax back if I never use Medicare?

No. Medicare tax is not refundable, and you cannot reclaim it even if you never enroll in Medicare or move out of the country before you turn 65. The tax is mandatory and funds the current program, not a personal account. If you are concerned about the value of Medicare, you can explore supplemental or alternative coverage options once you are may be able to access.

Do I pay Medicare tax on Social Security benefits?

No. Social Security benefits are not subject to Medicare tax. However, if you continue to work while receiving Social Security, you pay Medicare tax on your wages. Medicare tax and Social Security tax are separate payroll deductions.

What if my employer did not withhold Medicare tax?

Contact your employer's payroll department when ready. Employers are required by law to withhold Medicare tax, and if yours did not, you may owe it when you file your tax return. The IRS can also pursue the employer for unpaid taxes. Keep records of your pay stubs to document what was or was not withheld.

Does Medicare tax go up when I turn 65?

No. Your Medicare tax rate stays the same whether you are 25 or 65. If you continue to work after 65, you pay the same 1.45 percent (or 2.45 percent if you earn above the threshold) as you did before. The tax does not increase based on age.

Why do I pay Medicare tax if I have VA benefits or military health coverage?

Medicare tax is mandatory for all workers regardless of what other health coverage you have. VA benefits and military health coverage do not exempt you from Medicare tax. When you turn 65, you can enroll in Medicare in addition to your other coverage, or you can coordinate your benefits.