Medicare premiums depend on your income, the coverage you choose, and how long you've paid into the system

Medicare has four separate premiums — one for hospital insurance, one for medical insurance, one for prescription drug coverage, and one for supplemental plans if you buy them. The amount you pay for each depends on different rules. Your income from two years ago is the biggest factor for Parts B and D. How many years you or your spouse worked and paid Medicare taxes affects Part A. The specific plan you pick affects all of them. Understanding which premium applies to you, and why, helps you predict your costs and spot errors on your bill.

Key Takeaways

  • Part A (hospital insurance) is usually free if you or your spouse paid Medicare taxes for at least 10 years, but costs up to $505 per month if you did not.
  • Part B (medical insurance) costs more if your income from two years ago was above a certain threshold, with higher earners paying two to three times the standard amount.
  • Part D (prescription drugs) premiums vary by plan and also increase for higher incomes, using the same income thresholds as Part B.
  • Your income is measured by your Modified Adjusted Gross Income (MAGI) from your tax return, and you can appeal if your income dropped due to retirement or job loss.
  • Supplemental insurance (Medigap) premiums are set by the insurance company you choose and do not depend on income.

Part A: Hospital Insurance and the Work History Rule

Part A covers hospital stays, skilled nursing care, and hospice. Most people pay nothing for Part A because they or their spouse paid Medicare taxes while working for at least 10 years (40 quarters). If you do not meet that threshold, you pay a monthly premium.

The premium for Part A without sufficient work history is $505 per month in 2024 if you have 30 to 39 quarters of coverage, or $278 per month if you have fewer than 30 quarters. These amounts change each year. If you are still working and paying taxes, additional quarters can lower your premium or eventually make it free. You can check your work history by creating an account on ssa.gov and viewing your Social Security statement.

Part B: Medical Insurance and Income-Based Pricing

Part B covers doctor visits, outpatient care, and some preventive services. The standard premium in 2024 is $174.70 per month, but you pay more if your income exceeds certain thresholds. Medicare uses your Modified Adjusted Gross Income (MAGI) from your tax return from two years before the year you are paying for — so in 2024, Medicare looks at your 2022 income.

The income brackets for 2024 are: single filers earning over $97,000 and married couples filing jointly earning over $194,000 pay higher premiums. The more you earn above the threshold, the more you pay. A single person earning $250,000 might pay $559.50 per month instead of $174.70. These brackets adjust each year. If your income dropped significantly due to retirement, job loss, or a major life event, you can file a form with Social Security to request a lower premium based on your current income instead of your prior-year income.

Part D: Prescription Drug Coverage and Income Adjustments

Part D premiums vary widely depending on which plan you choose — they range from roughly $7 to $100 per month depending on the insurer and the drugs covered. Like Part B, Part D also uses income-based adjustments. If your income exceeds the same thresholds as Part B, you pay an additional surcharge on top of your plan's base premium.

The surcharge can add $12 to $77 per month depending on your income level and filing status. You choose your Part D plan during the annual enrollment period (October 15 to December 7), and the premium you see during that window is the premium you will pay the following year. Plans change their formularies and premiums annually, so comparing plans each year can save you money.

How Income Is Measured and When You Can Appeal

Medicare calculates your income using your Modified Adjusted Gross Income (MAGI) from your federal tax return. This includes wages, self-employment income, interest, dividends, and certain other sources. It does not include Social Security benefits unless you are filing a joint return and your spouse has substantial income.

If your income dropped in the current year — because you retired, lost a job, or had a major life event — you do not have to wait two years for the lower income to take effect. You can file a form called the "Medicare Income-Related Monthly Adjustment Amount — Life-Changing Event" with Social Security. You will need to document the change with tax returns, a termination letter, or other proof. Social Security will review your request and adjust your premiums if approved. This can take several weeks, so file as soon as your income changes.

Supplemental Insurance (Medigap) Premiums

Supplemental insurance, called Medigap, covers costs that Original Medicare does not — like copayments, coinsurance, and deductibles. Medigap premiums are set by the insurance company you choose, not by Medicare, and they do not depend on your income. Instead, they depend on your age, your health (in some states), the specific plan letter you choose (Plan A, Plan G, Plan N, and so on), and the insurance company.

Medigap premiums typically range from $100 to $300 per month, but vary widely by location and insurer. You have the best rates if you buy Medigap within six months of turning 65 and enrolling in Part B — this is called the open enrollment period. After that window closes, insurers can charge more based on your health history. Comparing quotes from multiple insurers in your area is essential, because the same plan can cost very different amounts from different companies.

Medicare Advantage (Part C) and Plan-Specific Costs

Medicare Advantage is an alternative to Original Medicare. It is run by private insurers and usually includes Part A, Part B, and Part D all in one plan. The premium for Medicare Advantage varies by plan and insurer, and some plans have zero premium. However, you typically pay copayments when you use services, and you may have a network of doctors you must use.

Like Part B and Part D, Medicare Advantage premiums also increase for higher incomes. If you choose a Medicare Advantage plan, you do not buy Medigap — the two cannot be used together. Your total out-of-pocket costs depend on both the premium and the copayments you will actually use, so comparing plans requires looking at both numbers together.

Frequently Asked Questions

Why does Medicare use my income from two years ago instead of this year?

Medicare uses prior-year income because it takes time to process tax returns and calculate premiums for millions of people. Using a consistent, documented income source (your tax return) prevents fraud and keeps the system running smoothly. If your income dropped recently, you can request an adjustment by filing a life-changing event form with Social Security.

Can I reduce my Part B or Part D premium by reducing my income?

You cannot deliberately reduce your income to lower your Medicare premium. However, if your income genuinely dropped due to retirement, job loss, or a major life event, you can report that change and your premium will adjust. Social Security will ask for documentation of the change.

What happens if I disagree with the income Medicare used to calculate my premium?

You can request a reconsideration by contacting Social Security. Bring documentation of your actual income — recent tax returns, pay stubs, or other proof. If you believe Medicare made an error, Social Security will review your case and adjust your premium if warranted.

Do I have to pay higher premiums forever if my income is high one year?

No. Your premium is based on your income from two years prior. When that year passes and your income from a more recent year becomes the basis for your premium, your payment will adjust. If your income dropped in the current year, you can file a life-changing event form to adjust your premium sooner.

Are there any Medicare premiums that do not depend on income?

Part A premiums (if you owe them) do not depend on income — they depend only on your work history. Medigap premiums do not depend on income either, though they depend on your age, location, and the plan you choose. Part B, Part D, and Medicare Advantage premiums all have income-based adjustments.