Medicare costs you money in four separate ways, and the amount depends on which parts you choose and your income

Most people on Medicare pay a monthly premium for Part B (doctor visits and outpatient care), a deductible when you use it, and copayments or coinsurance at the time of service. Part A (hospital care) is usually free if you or your spouse paid Medicare taxes for at least 10 years while working. Part D (prescription drugs) adds another monthly premium. Part C (Medicare Advantage) replaces Parts A and B with a single plan that often costs less or nothing per month, but usually has higher copayments when you use care.

The exact amount you pay changes every year. The Centers for Medicare & Medicaid Services (CMS) sets new rates each October for the following year. Your income also matters: if you earn above a certain threshold, you pay a higher premium for Parts B and D. This is called an Income-Related Monthly Adjustment Amount (IRMAA).

Key Takeaways

  • Part B premiums in 2024 start at $164.90 per month for most people, but rise to $560.50 if your income exceeds $194,000 as a single filer.
  • Part A is free for most people, but you pay a deductible ($1,632 in 2024) only when you are admitted to a hospital.
  • Part D (drug coverage) premiums vary by plan and range from roughly $7 to $100 per month, depending on which drugs you take and which insurer you choose.
  • Part C (Medicare Advantage) plans often charge $0 monthly premium but typically have higher copayments ($20–$50 per doctor visit) than Original Medicare.
  • Your costs are recalculated each year based on your prior income, so a large one-time payment (like a home sale) can raise your premiums for up to two years.

Part A: Hospital Insurance and What It Costs

Part A covers inpatient hospital stays, skilled nursing facility care after a hospital stay, hospice, and some home health services. Most people pay nothing for the Part A premium because they or their spouse paid Medicare taxes for at least 10 years. If you do not meet that requirement, you can buy Part A for $278 per month (2024 rate), though some people pay more.

You do not pay anything until you actually use hospital care. When you are admitted to a hospital, you pay a deductible of $1,632 per benefit period (2024). A benefit period starts when you enter the hospital and ends 60 days after you leave without returning. If you stay longer than 60 days in the same benefit period, you pay coinsurance of $408 per day for days 61–90, and $816 per day for days 91 and beyond (up to 150 days total).

For skilled nursing facility care after a hospital stay, you pay nothing for the first 20 days, then $204 per day for days 21–100 (2024 rates). After 100 days in a benefit period, you pay all costs yourself.

Part B: Doctor Visits and Outpatient Care

Part B covers doctor visits, lab tests, imaging, outpatient surgery, and durable medical equipment like wheelchairs and oxygen. The standard Part B premium for 2024 is $164.90 per month, but this rises if your income is above certain thresholds. If you are single and earned more than $97,000 in the prior two years, or married filing jointly and earned more than $194,000, you pay an additional amount on top of the base premium.

The income brackets are steep. A single person earning $194,000 pays $560.50 per month for Part B — more than three times the standard rate. These higher amounts are called IRMAA tiers, and they are based on your Modified Adjusted Gross Income (MAGI) from your tax return two years prior. This means if you sell a house or take a large withdrawal from a retirement account, your premiums may jump the following year.

Beyond the premium, you also pay an annual deductible of $240 (2024) before Part B coverage begins. After you meet the deductible, you typically pay 20% coinsurance for most services. For some preventive services like annual wellness visits and cancer screenings, you pay nothing.

Part D: Prescription Drug Coverage

Part D is optional, but if you do not sign up when you first become may be able to access and later want coverage, you pay a permanent penalty for each month you were without it. The penalty is roughly 1% of the national average Part D premium per month of delay.

Part D premiums vary widely depending on which plan you choose and which drugs are on the plan's formulary. In 2024, premiums range from roughly $7 to $100 per month across different insurers and regions. The plan you choose affects not just the premium but also your out-of-pocket costs when you fill prescriptions. A plan with a lower premium might have higher copayments, or it might not cover a drug you need.

Once you enroll in Part D, you move through several cost stages during the year. You pay the full copayment or coinsurance until your total drug costs reach $585 (2024 threshold). Then you enter the "donut hole" — a gap where you pay 25% of the cost of brand-name drugs and generics until your out-of-pocket spending reaches $5,850. After that, you pay a small copayment for the rest of the year. These thresholds change annually.

Part C: Medicare Advantage as an Alternative

Part C, also called Medicare Advantage, is an alternative to Original Medicare (Parts A and B). Instead of paying separate premiums for Parts A and B, you enroll in a private insurance plan that covers both. Many Part C plans charge $0 monthly premium, though some charge $50 to $200 per month. You still pay the Part B premium to Medicare, but the Part C plan handles the rest.

The trade-off is that Part C plans usually have higher copayments and coinsurance than Original Medicare. A doctor visit might cost $20 to $50 per visit instead of 20% coinsurance. Part C plans also typically require you to use doctors and hospitals within their network, whereas Original Medicare lets you see any provider who accepts Medicare.

Part C plans often include Part D (drug coverage) built in, so you do not pay a separate drug premium. Some plans also cover dental, vision, or hearing aids — benefits Original Medicare does not cover. If you choose Part C, you must still pay the Part A deductible if you are hospitalized, and you are subject to the same out-of-pocket limits as the plan design.

Income-Related Premiums and How They Work

If your income exceeds certain thresholds, Medicare charges you more for Part B and Part D. These higher amounts are called Income-Related Monthly Adjustment Amounts (IRMAA). The income threshold for 2024 is $97,000 for single filers and $194,000 for married couples filing jointly. These thresholds do not change year to year, but the additional premium amounts do.

IRMAA is calculated using your Modified Adjusted Gross Income (MAGI) from your tax return from two years before. If you turn 65 in 2024, Medicare uses your 2022 tax return to set your premiums. This two-year lag means a major life event — a home sale, inheritance, or large retirement account withdrawal — can raise your premiums unexpectedly.

You can request a recalculation if your income dropped significantly due to retirement, death of a spouse, or loss of income-producing property. You must file a form called the Medicare Income-Related Monthly Adjustment Amount — Life-Changing Event (form SSA-44). Social Security will review your current-year income and may lower your premiums retroactively.

When and How to Pay Your Premiums

Part B and Part D premiums are usually deducted automatically from your Social Security check each month. If you do not receive Social Security, Medicare bills you directly by mail. Part A has no premium for most people, so there is nothing to pay unless you are one of the small number who must buy it.

If you enroll in Part C, you pay the Part B premium to Medicare as usual, and the Part C plan premium (if any) is deducted separately. If you choose Original Medicare plus a Medigap supplemental plan, you pay the Medigap premium directly to the insurance company — Medicare does not collect it.

Premiums are due by the first of the month. If you miss a payment, Medicare may disenroll you from Part B or Part D. You can re-enroll during the General Enrollment Period (January 1 to March 31 each year), but you may face a permanent penalty for late enrollment.

Costs Beyond Monthly Premiums

Your total Medicare costs include more than just premiums. You also pay deductibles, copayments, and coinsurance when you use care. Original Medicare Part A has a $1,632 hospital deductible per benefit period (2024). Part B has a $240 annual deductible. After you meet the deductible, you typically pay 20% coinsurance for most services.

Medicare also sets an annual out-of-pocket maximum for Part A and Part B combined, but this limit is not a hard cap — you can spend more if you use expensive services. Part C plans do have an out-of-pocket maximum, usually $7,550 for in-network care (2024), after which the plan pays 100% of covered services for the rest of the year.

If you want coverage beyond what Medicare provides — such as dental, vision, or hearing — you can buy a separate plan. Dental plans typically cost $100 to $200 per year and cover cleanings and basic work. Vision plans cost $50 to $150 per year. These are not part of Medicare and are sold by private insurers.

Frequently Asked Questions

Do I have to pay for Part A if I worked and paid Medicare taxes?

No. If you or your spouse paid Medicare taxes for at least 10 years while working, Part A is free. You pay nothing until you use hospital care, at which point you pay the deductible. If you did not work long enough, you can buy Part A for $278 per month (2024), or sometimes less if you have a spouse with sufficient work history.

What happens if my income goes up after I enroll in Medicare?

Your Part B and Part D premiums are based on your income from two years prior. If your income rises this year, your premiums will not change until two years from now. If you have a major income event (like selling a house), you can request a recalculation by filing form SSA-44 with Social Security, and they may lower your premiums if your current income is lower.

Can I switch from Original Medicare to Medicare Advantage or back again?

Yes, but only during certain times. The Annual Enrollment Period runs October 15 to December 7 each year, and changes take effect January 1. If you miss this window, you cannot switch until the next year, with limited exceptions for people who move or lose coverage.

Is there a penalty if I do not sign up for Part D?

Yes. If you do not enroll in Part D when you first become may be able to access and later want coverage, you pay a permanent penalty of roughly 1% of the national average Part D premium for each month you were without it. This penalty stays with you for life, even if you later enroll.

What is the difference between Original Medicare and Medicare Advantage in terms of cost?

Original Medicare has lower monthly premiums (often $0 for Part A, $164.90 for Part B in 2024) but higher copayments and coinsurance when you use care. Medicare Advantage often has $0 monthly premium but higher copayments per visit ($20–$50). The best choice depends on how much care you expect to use and which doctors you want to see.