Medicare tax is a mandatory payroll deduction that funds the Medicare program

Medicare comes out of your paycheck because it is a tax, not a voluntary insurance purchase. The federal government requires employers to withhold a percentage of your wages and send it to the Medicare trust fund. You pay this tax while you work, and those payments build your may be able to access to receive Medicare benefits when you turn 65.

The amount withheld is 1.45% of your gross wages, split evenly between you and your employer — your employer also contributes 1.45%. If you are self-employed, you pay both portions yourself, for a total of 2.9%. This money does not go into a personal account with your name on it. It goes into a shared federal fund that pays for current Medicare beneficiaries' hospital care, doctor visits, and prescription drugs.

You cannot opt out of Medicare tax while you are working, even if you do not plan to use Medicare later. It is a condition of employment in the United States, the same way Social Security tax is withheld. The only exception is members of certain religious groups who have been granted a formal exemption, which requires a specific process process with the IRS.

Key Takeaways

  • Medicare tax is 1.45% of your wages, withheld by your employer and matched by them, to fund the Medicare program for people 65 and older.
  • The money you pay in Medicare tax does not sit in an account for you — it funds current beneficiaries, and your future benefits will be funded by workers paying in after you turn 65.
  • You cannot stop Medicare tax from being withheld from your paycheck unless you belong to a recognized religious group that has filed for an exemption with the IRS.
  • If you earn over $200,000 as a single filer or $250,000 as a married couple, an additional 0.9% Medicare tax applies to income above those thresholds.

How much Medicare tax comes out and where it goes

Your employer withholds 1.45% of every dollar you earn, regardless of how much you make. There is no cap on Medicare wages the way there is for Social Security tax. This means if you earn $30,000 a year, $300,000 a year, or $3 million a year, the 1.45% rate applies to all of it.

If your income exceeds $200,000 (single filer) or $250,000 (married filing jointly), an additional 0.9% Medicare tax is withheld on the amount above that threshold. This extra tax was added in 2013 to help fund the Affordable Care Act. Your employer is responsible for withholding it, and you will see it listed separately on your pay stub as "Additional Medicare Tax" or similar language.

The money withheld goes to the Centers for Medicare & Medicaid Services (CMS), a federal agency. It funds three parts of Medicare: Part A (hospital insurance), Part B (medical insurance for doctor visits and outpatient care), and Part D (prescription drug coverage). The fund operates on a pay-as-you-go basis — current workers' taxes pay for current retirees' care.

Why you pay Medicare tax before you are may be able to access to use Medicare

Medicare may be able to access begins at age 65 for most people. You may have paid Medicare tax for 40 or 50 years before you can use the program. This seems backwards, but it is how all social insurance programs work: younger workers fund benefits for older retirees, and when you reach 65, younger workers will fund your benefits.

You do not build a personal Medicare account the way you might build a 401(k). The government does not set aside your specific tax payments for your future use. Instead, you earn Medicare credits based on how much you have paid in. You need 40 credits to be covered by Medicare Part A at 65 — most people earn four credits per year, so 10 years of work is the minimum. If you have worked and paid Medicare tax for at least 10 years, you will have earned enough credits to receive Medicare Part A without paying a monthly premium.

If you have not worked long enough to earn 40 credits, you can still purchase Medicare coverage at 65, but you will pay a higher monthly premium for Part A. Spouses and dependents may also be covered based on a worker's earnings record, even if they did not pay Medicare tax themselves.

What happens to Medicare tax if you change jobs or become self-employed

If you change jobs, your new employer will continue to withhold 1.45% Medicare tax from your paycheck. There is no break or reset — the withholding continues as long as you are employed. Your Medicare credits accumulate across all jobs you have held, so switching employers does not affect your may be able to access.

If you become self-employed, you are responsible for paying both the employee and employer portions of Medicare tax. This is called self-employment tax. You pay 2.9% total on your net self-employment income (after business expenses). You report this on Schedule SE when you file your taxes, and you may owe quarterly estimated tax payments to avoid penalties.

Self-employed people can deduct half of their self-employment tax as a business expense on their tax return, which reduces their taxable income. This is a partial offset, but you still pay more total tax than a W-2 employee because you cover both portions.

Medicare tax and your Social Security benefits

Medicare tax and Social Security tax are separate systems, though they are both withheld from your paycheck. Social Security tax is 6.2% (employee portion) and funds retirement, disability, and survivor benefits. Medicare tax is 1.45% and funds health insurance for people 65 and older.

Social Security has a wage cap — in 2024, you only pay Social Security tax on income up to $168,600. Medicare has no cap, so high earners pay more Medicare tax. The two programs have different may be able to access rules, different benefit amounts, and different trust funds, but they are often confused because they appear together on your pay stub.

Your Medicare credits are based only on Medicare tax paid, not on Social Security tax. Similarly, your Social Security benefit amount is based on Social Security tax paid, not Medicare tax. You can have enough credits for one program but not the other, though most full-time workers earn credits for both.

What to do if you think Medicare tax is being withheld incorrectly

Check your pay stub each pay period to confirm the correct amount is being withheld. The line item should show 1.45% of your gross wages, plus any additional 0.9% Medicare tax if your income is above the threshold. If the percentage is higher or the calculation looks wrong, contact your payroll department or HR office first — it is usually a data entry error.

If your employer is not withholding Medicare tax at all, or is withholding an incorrect amount, you can report it to the IRS. Use Form 8919 (Unclaimed Employment Taxes) when you file your taxes to report and pay any Medicare tax your employer failed to withhold. You can also contact the IRS at 1-800-829-1040 to report the issue directly.

Keep copies of your pay stubs for at least three years. They are your record of how much Medicare tax you have paid and are useful if you need to dispute a withholding or verify your earnings record with Social Security.

Frequently Asked Questions

Can I get Medicare tax refunded if I do not use Medicare?

No. Medicare tax is not refundable, and you cannot reclaim it even if you do not use Medicare benefits. Once you turn 65, you are covered by Medicare Part A if you have earned 40 credits, and the tax you paid is considered payment for that coverage. If you choose not to enroll in Medicare, the tax you paid does not come back to you.

What if I worked outside the United States and paid taxes there instead?

If you worked in another country and paid social insurance taxes there, those payments may not count toward your Medicare credits. The United States has totalization agreements with some countries that allow certain foreign work to count, but you must request this. Contact the Social Security Administration to learn whether your country has an agreement and how to report foreign earnings.

Does Medicare tax explore to all types of income?

Medicare tax applies to wages and self-employment income. It does not explore to investment income, rental income, or other passive income. If you have a job and also earn money from investments, only your wages and self-employment income are subject to Medicare tax.

Why does Medicare tax have no wage cap when Social Security tax does?

Congress set different rules for the two programs. Social Security has a wage cap because benefits are tied to earnings — higher earners receive higher benefits up to a maximum. Medicare benefits are the same for everyone regardless of how much they earned, so Congress decided to tax all wages equally to fund it fairly.

If I retire early, do I still have to pay Medicare tax?

You only pay Medicare tax on income you earn from work. If you retire and have no wages or self-employment income, no Medicare tax is withheld. If you work part-time in retirement before age 65, Medicare tax continues to be withheld from those wages at the standard 1.45% rate.