What makes Medicare expensive

Medicare is expensive because it pays for a lot of medical care — hospital stays, doctor visits, prescription drugs, and equipment — for 67 million people, most of them over 65. The program's costs have grown faster than inflation for decades because medical care itself has become more expensive. Hospitals charge more per procedure. Drugs cost more. People live longer and need more treatment. Medicare's structure also means it covers the same service differently depending on which part you use, which can create gaps in coverage that force seniors to buy supplemental insurance.

Your own costs depend on which parts of Medicare you have, how much medical care you actually use, and whether you have other insurance. Someone with only Part A and Part B who sees a specialist multiple times a year will pay more out of pocket than someone who rarely needs care. A person on expensive medications will pay more in Part D premiums and cost-sharing than someone taking generic drugs. These individual costs add up differently for each person.

Key Takeaways

  • Medicare Part A (hospital) and Part B (doctor) have monthly premiums, annual deductibles, and copayments that vary by service type.
  • Part D (prescription drugs) premiums and out-of-pocket costs change yearly, and the "donut hole" coverage gap can make expensive medications unaffordable mid-year.
  • Supplemental insurance (Medigap) covers some costs Medicare does not, but adds another monthly premium to your budget.
  • The total cost of Medicare to a senior depends on income, health conditions, medications, and which coverage gaps you choose to fill.
  • Medical inflation — the rising cost of care itself — is the largest driver of Medicare premium and cost-sharing increases over time.

How Part A and Part B premiums work

Part A (hospital insurance) is usually free if you or your spouse paid Medicare taxes for at least 10 years while working. Part B (medical insurance for doctor visits and outpatient care) costs a monthly premium that changes each year. In 2024, the standard Part B premium is $164.90 per month, but you may pay more if your income is above a certain threshold — this is called Income-Related Monthly Adjustment Amount (IRMAA). The income limits are based on your tax return from two years prior, so a large one-time income event (like selling a house) can raise your premium unexpectedly.

Beyond the premium, you pay a Part B deductible once per year (currently $240 in 2024) before Medicare starts paying its share. After that, you typically pay 20 percent of the approved amount for most services, while Medicare pays 80 percent. For some services like mental health visits, the copayment is a flat dollar amount instead. These costs add up quickly if you see multiple specialists or need frequent outpatient procedures.

The real cost of Part D and the coverage gap

Part D (prescription drug coverage) premiums vary widely depending on which plan you choose — they can range from under $10 per month to over $100, and the premium changes every year. When you fill a prescription, you pay a copayment or coinsurance (a percentage of the drug cost) until you reach your plan's initial coverage limit, usually around $5,000 in total drug costs per year.

Once you hit that limit, you enter the "donut hole" — a coverage gap where you pay the full price of your medications until your out-of-pocket spending reaches a higher threshold (around $8,550 in 2024). During the donut hole, even generic drugs can become unaffordable. After you exit the donut hole, Medicare and your plan share costs again, but you pay coinsurance rather than a copayment, which can still be expensive for brand-name drugs. This structure means a senior on multiple expensive medications can face thousands of dollars in out-of-pocket costs in a single year.

Why supplemental insurance (Medigap) adds to your bill

Medicare does not cover everything. It does not pay for routine dental, vision, hearing aids, or long-term care. It also leaves you responsible for deductibles, copayments, and coinsurance. Many seniors buy a Medigap (supplemental insurance) policy to cover these gaps. Medigap premiums range from roughly $100 to $300 per month depending on your age, location, and which plan letter (A through N) you choose. Plan G, one of the most popular, typically costs $150 to $250 per month.

If you do not buy Medigap, you have two other options: enroll in a Medicare Advantage plan (Part C), which is an alternative to Original Medicare that often has lower or zero premiums but uses networks and may require prior authorization; or pay out of pocket for the gaps. Many seniors find that Medigap is worth the cost because it protects them from unpredictable medical bills, but it is another monthly expense on top of Part B and Part D premiums.

Medical inflation and why costs keep rising

The largest reason Medicare costs have climbed is that the cost of medical care itself has risen faster than general inflation. A hospital stay, an MRI, a surgical procedure, or a brand-name drug costs significantly more today than it did five or ten years ago. Hospitals and doctors negotiate prices with Medicare, but those negotiated rates still increase annually. Pharmaceutical companies raise drug prices regularly, even for medications that have been on the market for years. These increases get passed to seniors through higher premiums and higher cost-sharing amounts.

The aging population also drives costs. As more people live into their 80s and 90s, they need more medical care. Chronic conditions like diabetes, heart disease, and arthritis require ongoing treatment. New treatments and technologies — which are often expensive — become available and get added to what Medicare covers. None of these trends are likely to reverse, which is why Medicare costs continue to rise year after year.

How your income affects what you pay

If your income is above certain thresholds, you pay higher premiums for Part B and Part D. These income-based surcharges (IRMAA) are calculated using your Modified Adjusted Gross Income (MAGI) from your tax return from two years before. For 2024, if you are single and your MAGI is over $97,000, your Part B premium increases. If it is over $123,000, you pay even more. Married couples filing jointly face higher thresholds but still pay surcharges if income exceeds roughly $194,000.

The surcharge brackets do not adjust for inflation, which means more people fall into higher brackets each year even if their income has not actually increased. If you have a one-time income event — selling a home, inheriting money, taking an early retirement distribution — your premium can jump unexpectedly. You can request a reconsideration if your income has dropped due to retirement or a life event, but you have to contact Social Security to do so.

What you can do to manage costs

Review your coverage every year during the Annual Enrollment Period (October 15 to December 7). Part D plans and Medigap plans change their premiums and coverage every year, and switching to a different plan can save hundreds of dollars annually. Use the Medicare Plan Finder tool on Medicare.gov to compare plans side by side based on your specific medications and doctors.

If you take expensive medications, ask your doctor whether a generic or lower-cost alternative exists. Some Part D plans offer $0 or $5 copayments for certain generic drugs. If you cannot afford your medications during the donut hole, look into Patient information Programs run by drug manufacturers — many offer free or reduced-cost drugs to people who meet income requirements. If your income is low, you may be may be able to access for Extra Help, a federal program that reduces Part D premiums and cost-sharing; you can check your status through Social Security or your local Area Agency on Aging.

Frequently Asked Questions

Why did my Part B premium go up so much this year?

Part B premiums increase annually based on the cost of medical care and changes in the Medicare program's finances. If your income rose (or was reported higher on your tax return from two years ago), you may also be paying an IRMAA surcharge. Check your Social Security statement to confirm your income was reported correctly, and contact Social Security if it was not.

Can I reduce my out-of-pocket costs if I am on a tight budget?

If your income is below 150 percent of the federal poverty level, you may be may be able to access for Extra Help, which covers most of your Part D premiums and cost-sharing. Contact your local Area Agency on Aging or explore through Social Security. If you are not may be able to access for Extra Help, switching to a different Part D plan or Medigap plan during open enrollment may lower your costs.

Is Medicare Advantage cheaper than Original Medicare plus Medigap?

Medicare Advantage plans often have lower or zero premiums and may have lower out-of-pocket maximums, but they use networks and may require prior authorization for care. Original Medicare with Medigap gives you more flexibility to see any doctor but costs more in premiums. The answer depends on your health, which doctors you see, and which medications you take — compare both options during open enrollment.

What happens if I cannot afford my medications?

Talk to your doctor about generic or lower-cost alternatives. Check whether your Part D plan offers $0 copayments for certain drugs. Contact the drug manufacturer to ask about Patient information Programs. If your income qualifies, explore for Extra Help through Social Security. Some community health centers and nonprofits also offer medication information.

Will my Medicare costs keep going up every year?

Yes. Medical care costs rise faster than general inflation, and Medicare premiums and cost-sharing amounts increase annually to reflect those rising costs. The exact amount of increase varies year to year, but the trend has been consistent for decades. Reviewing your coverage options each year during open enrollment is the best way to manage the impact on your budget.