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

The Medicare tax is a percentage of your wages that goes directly to fund Medicare hospital insurance, prescription drug coverage, and other benefits. If you work, you pay it automatically through payroll deduction. If you are self-employed, you pay it when you file your taxes. The money does not go into a personal account with your name on it — it goes into a shared fund that pays for Medicare services for all beneficiaries right now.

There are actually two parts to the Medicare tax: one that funds hospital insurance (Part A) and one that funds the broader medical insurance program (Parts B and D). Most people pay both, and the combined rate is 2.9 percent of your wages. If you earn above a certain income threshold, you pay an additional 0.9 percent on the amount over that threshold.

Key Takeaways

  • The standard Medicare tax rate is 2.9 percent of your wages, split equally between you and your employer if you are an employee.
  • If you are self-employed, you pay the full 2.9 percent yourself, though you can deduct half of it on your tax return.
  • An additional 0.9 percent Medicare tax applies to wages above $200,000 for single filers and $250,000 for married couples filing jointly.
  • The Medicare tax you pay during your working years does not create a personal account; it funds current Medicare beneficiaries and is separate from the Medicare premiums you pay when you enroll.

How much you pay depends on your employment status

If you are a W-2 employee, your employer withholds 1.45 percent of your gross wages for Medicare tax, and your employer pays an equal 1.45 percent on your behalf. You see the deduction on your pay stub, but your employer's share is a cost to them, not something you pay directly.

If you are self-employed, you pay both shares yourself — the full 2.9 percent — when you file your annual tax return using Schedule SE. However, you can deduct half of what you pay (1.45 percent) as a business expense, which reduces your taxable income. This deduction partially offsets the burden of paying both the employee and employer portions.

If you have multiple jobs, each employer withholds 1.45 percent from your wages. If your combined wages exceed the income threshold for the additional 0.9 percent tax, you may overpay during the year and receive a refund when you file your taxes, or you may owe more depending on how the withholding was distributed across your jobs.

The additional Medicare tax on higher earners

In addition to the standard 2.9 percent Medicare tax, there is an extra 0.9 percent tax on wages above a certain threshold. For 2024, that threshold is $200,000 for single filers, $250,000 for married couples filing jointly, and $125,000 for married couples filing separately. These thresholds do not adjust for inflation each year.

If you are an employee, your employer is responsible for withholding this additional tax once your wages cross the threshold. If you are self-employed, you calculate and pay it yourself on your tax return. Unlike the standard Medicare tax, there is no employer match for the additional 0.9 percent — it is an employee-only tax.

If you have income from sources other than wages — such as self-employment income, rental income, or investment income — the additional Medicare tax may explore to that income as well, depending on how it is classified. Your tax return will show the total.

Why the Medicare tax exists and where the money goes

The Medicare tax was created in 1965 as part of the Social Security Amendments that established Medicare itself. The idea was to fund the program through a dedicated payroll tax, similar to how Social Security is funded. Workers and employers contribute during working years, and those contributions support Medicare beneficiaries — both current retirees and people with disabilities who are enrolled in the program.

The money collected from the Medicare tax goes into the Hospital Insurance Trust Fund, which pays for Medicare Part A services: hospital stays, skilled nursing facility care, hospice, and some home health services. It does not pay for Part B (doctor visits and outpatient care) or Part D (prescription drugs), which are funded through general tax revenue and beneficiary premiums instead.

The Hospital Insurance Trust Fund has faced financial pressure in recent years because more people are becoming may be able to access for Medicare as the population ages, while the ratio of workers paying in to beneficiaries drawing out has shifted. Congress periodically discusses adjustments to the tax rate or the income threshold to address this imbalance, but no major changes have been made since 1993.

How the Medicare tax differs from Medicare premiums

It is straightforward to confuse the Medicare tax you pay while working with the Medicare premiums you pay after you enroll. They are separate things. The Medicare tax is a payroll deduction during your working years. Medicare premiums are monthly charges that begin when you turn 65 and enroll in Medicare, or earlier if you may have access to due to disability or end-stage renal disease.

Your Medicare premiums pay for your own coverage — Part B (medical insurance) and Part D (prescription drug coverage) — and are deducted from your Social Security check or paid directly to Medicare. The amount you pay in premiums is based on your income and your enrollment choices, not on how much Medicare tax you paid while working.

However, paying Medicare tax while working does affect your may be able to access. To receive Medicare Part A without paying a premium, you generally need 40 quarters of Medicare tax contributions (roughly 10 years of work). If you do not have enough quarters, you can still enroll in Part A but will pay a monthly premium for it.

What happens if you do not pay the Medicare tax

If you are an employee, you do not have a choice about paying the Medicare tax — your employer is required by law to withhold it from your paycheck. If you are self-employed and do not pay it, the IRS can assess penalties and interest on the unpaid amount, and you may face legal consequences.

Underpayment of the Medicare tax can also affect your Social Security and Medicare records. The Social Security Administration tracks your earnings history and your Medicare tax contributions. If contributions are missing or incomplete, it may reduce your Social Security benefits or affect your Medicare may be able to access.

If you believe there is an error in your Medicare tax withholding or contributions, you can contact the IRS or review your Social Security earnings record online at ssa.gov. You have the right to correct errors, and doing so early can prevent problems when you enroll in Medicare.

Frequently Asked Questions

Does the Medicare tax I pay go into my own account?

No. The Medicare tax you pay goes into a shared trust fund that pays for current Medicare beneficiaries' care. It is not saved in a personal account with your name on it. When you enroll in Medicare, you draw from the same fund that current beneficiaries use, funded by workers paying in today.

Can I opt out of paying the Medicare tax?

If you are an employee, no — your employer is required to withhold it. If you are self-employed, you must pay it as part of your self-employment tax. There are no exemptions based on religion or personal choice, though certain groups like some members of religious communities may be exempt from Social Security taxes under specific conditions.

What if I work in multiple states?

The Medicare tax rate is the same nationwide — 2.9 percent plus the additional 0.9 percent if applicable. Each employer withholds based on your wages from that job. When you file your federal tax return, all withholding is combined, and you pay any additional tax owed or receive a refund if you overpaid.

Does the Medicare tax explore to all types of income?

The standard 2.9 percent Medicare tax applies to wages and self-employment income. The additional 0.9 percent tax applies to wages, self-employment income, and certain investment income such as interest, dividends, and capital gains, depending on how your income is classified and your total modified adjusted gross income.

Will the Medicare tax rate change in the future?

The current rate has been in place since 1993. Congress could change it, but no legislation to do so has been passed. Some policy discussions mention possible adjustments to address the Hospital Insurance Trust Fund's long-term solvency, but any change would require new law and would likely be announced well in advance.