What You'll Really Pay For Medicare Coverage Monthly

Most people walk into Medicare assuming it’s free. I’ve watched that assumption cost retirees hundreds of dollars a month in surprise premiums, cost-sharing, and uncovered services they didn’t see coming. Let me save you that particular frustration.

Here’s the actual picture: Medicare is not one thing with one price. It’s a system with multiple parts, each with its own premium, deductible, and cost-sharing rules. What you pay every month depends heavily on which parts you have, what you earn, and whether you’ve made a few key enrollment decisions correctly. I’ll walk you through each piece, starting with the numbers that matter most right now.

Part A: The One Most People Actually Don’t Pay For

Hospital insurance. That’s what Medicare Part A covers: inpatient hospital stays, skilled nursing facility care, hospice, and some home health services.

Here’s what most people don’t realize: if you or your spouse worked and paid Medicare taxes for at least 40 quarters (that’s 10 years), your Part A premium is $0. Free. This applies to the vast majority of people turning 65. If you have fewer than 30 quarters of work history, you could pay up to around $505 a month currently. Somewhere in between, 30 to 39 quarters, puts you around $278 a month.

But “free premium” doesn’t mean free. Part A has a per-benefit-period deductible. Think of it as a reset-able deductible tied to each hospital stay rather than a calendar year. You pay it when you’re admitted, and if you’re admitted again after 60 days, you pay it again. That’s the part that surprises people.

Part B: The One Almost Everyone Pays

*Depends on work history; most pay $0.

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Part B covers outpatient care: doctor visits, preventive services, lab work, durable medical equipment. This is where your monthly cash actually leaves your wallet.

The standard Part B premium is currently around $185 a month per person. That’s the number to work with if your income is at or below $106,000 as an individual (or $212,000 if you’re married filing jointly). If you earn more than that, you’ll pay more. A lot more, actually.

This is where IRMAA comes in. IRMAA stands for Income-Related Monthly Adjustment Amount, and it’s a surcharge that the Social Security Administration (SSA) tacks onto your Part B premium based on your income from two years prior. So what you pay in 2026 is based on your 2024 tax return. At the highest income tier, Part B alone can cost over $590 a month per person. I’ve seen people genuinely shocked by this. They retired, their income dropped significantly, and they’re still paying a surcharge based on the year they were still working full-time. You can appeal this using Form SSR-44 if you’ve had a qualifying life event like retirement, divorce, or death of a spouse. Most people don’t know they can do that.

Part B also has an annual deductible (currently around $257), and after that you typically pay 20% of Medicare-approved costs. No cap on that 20%, by the way. That’s where supplemental insurance comes in, which I’ll get to.

Part D: Prescription Drugs

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Medicare Part B Premium Cost - Shocking! What is IRMAA? · Medicare on Video - Medicare Specialist on YouTube

Part D is your prescription drug coverage. You get it either as a standalone plan attached to Original Medicare, or built into a Medicare Advantage plan.

Premiums vary enormously by plan and by location. Nationally, the average standalone Part D premium is currently somewhere in the $40 to $55 per month range, but you can find plans below $20 or above $100 depending on your drugs and your zip code. The right plan for your neighbor is genuinely not the right plan for you. If you’re taking four specific medications, the plan with the $12 premium might cost you more overall than a plan at $45 because of how each plan’s formulary (drug list) is structured.

IRMAA applies to Part D too, though the surcharges are smaller, ranging from about $13 to $81 per month extra.

A major change took effect starting in 2025: out-of-pocket prescription drug costs under Part D are now capped at $2,000 per year. For people who previously hit what used to be called the “donut hole” and faced catastrophic drug costs, this is a meaningful shift. The cap is real, and it’s now baked into the program.

Medicare Advantage vs. Original Medicare: The Cost Question

Medicare Advantage (Part C) is an alternative way to get your Medicare benefits through a private insurance company. Many plans advertise $0 premiums, and that’s technically accurate. But here’s the thing I keep telling people: you still pay your Part B premium. Always. The $0 just means the Advantage plan itself isn’t charging you an additional premium on top of that.

What you’re trading for that $0 plan premium is typically a network restriction and different cost-sharing. You might pay a $15 copay to see your primary care doctor, or a $400 copay for an outpatient surgery. Some plans are genuinely excellent deals, especially for people who are healthy, stay local, and use their plan’s network. Others are fine until you get sick, and then the copays and prior authorization requirements add up fast. That’s my honest take after watching people work through both options.

The AARP Medicare resource center (aarp.org/health/medicare-insurance) has a solid comparison tool that walks through Advantage vs. Original Medicare tradeoffs, and it’s worth spending an hour there if you’re still deciding.

The Part Nobody Talks About Enough: Medigap

If you stay with Original Medicare (Part A and B), that uncapped 20% coinsurance on Part B can become a serious problem. One complex surgery. One cancer treatment. One extended hospital stay. The bills add up in ways that can genuinely threaten financial stability.

Medigap, also called Medicare Supplement insurance, is a private policy that fills in those gaps. Plans are standardized by letter (Plan G is the most popular right now, since Plan F was phased out for new enrollees). Premiums for a Plan G typically range from around $100 to $200+ per month depending on your age, gender, location, and the insurance company. That sounds like real money, and it is. But in exchange, your out-of-pocket exposure shrinks dramatically.

The catch: Medigap doesn’t cover prescription drugs (you still need Part D) and it doesn’t work with Medicare Advantage. You choose a lane.

If you’re shopping for Medigap, do yourself a favor and at least call your state’s SHIP office. SHIP stands for State Health Insurance Assistance Program, and it’s a free counseling program staffed by trained volunteers who have no financial incentive to sell you anything. Find yours at shiphelp.org.

Putting It All Together: What You Might Actually Spend

Let me give you a realistic monthly picture for a typical Medicare beneficiary in 2026, not a guarantee, but an honest range.

Someone on Original Medicare with a Part G Medigap plan and a standalone Part D plan, with income below the IRMAA threshold, is likely looking at:

• Part B premium: roughly $185
• Medigap Plan G: roughly $120 to $180 depending on age and state
• Part D: roughly $30 to $60

That’s a combined range of approximately $335 to $425 per month. Add in Part A’s $0 premium if you’ve got the work history, and that’s your full Medicare cost structure.

Someone on Medicare Advantage with a $0 plan premium still pays their $185 Part B premium, plus whatever cost-sharing hits them over the course of the year.

Higher earners with IRMAA surcharges can easily see Part B and D combined exceed $700 a month per person before any supplemental coverage. That’s a number I think more pre-retirees need to hear while there’s still time to plan around it.

One thing I’d add before you go: Medicare costs in retirement are almost always higher than people project. Building a realistic number into your retirement income planning, before you need it, is worth the uncomfortable math. The people I’ve seen handle this well almost always did the homework early.

This article is for informational purposes only. Medicare rules change annually. Always verify current plan details at Medicare.gov or by calling 1-800-MEDICARE (1-800-633-4227). This site does not sell insurance or recommend specific plans.

Sources

• Yes4All Wooden Balance Board for Seniors
• MedCenter 31-Day Monthly Pill Organizer
• iHealth Track Wireless Blood Pressure Monitor
• Kampus Production
• Medicare For Dummies

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Recommended Resources

Disclosure: As an Amazon Associate, we earn a small commission from qualifying purchases at no extra cost to you. We only recommend products that genuinely support the topics covered in this article.

• Medicare For Dummies (~$22), The definitive consumer guide to Medicare, enrollment windows, Part A/B/C/D, and supplement plans.
• Get What’s Yours for Medicare (~$17), Maximize your Medicare benefits and minimize out-of-pocket costs. Covers Part D drug coverage gaps and Medigap in depth.