Most people on Medicare pay at least $185 per month in 2025, and total annual costs typically range from about $2,200 to well over $7,000 depending on your coverage choices, health needs, and income. Medicare is not free, even if you paid into it your entire working life. The program has premiums, deductibles, copays, and coinsurance spread across its different parts, and the total adds up faster than many people expect.
Part A: Hospital Coverage
Part A covers hospital stays, skilled nursing facilities, and hospice care. If you or your spouse paid Medicare taxes for at least 10 years (40 quarters), you pay no monthly premium for Part A. Most people fall into this category. If you worked fewer than 30 quarters, you’ll pay up to $518 per month, which is one of the steepest costs in the entire Medicare system.
Even with premium-free Part A, you still face a deductible of $1,676 per benefit period in 2025. A “benefit period” starts when you’re admitted to the hospital and ends 60 days after you stop receiving inpatient care, so it’s possible to pay this deductible more than once in a single year if you have separate hospital stays. After 60 days in the hospital, daily coinsurance kicks in. For skilled nursing facility stays, you pay nothing for the first 20 days, then $209.50 per day for days 21 through 100. After day 100, Medicare stops covering skilled nursing entirely.
Part B: Doctor Visits and Outpatient Care
Part B is where the guaranteed monthly bill lives. The standard premium in 2025 is $185 per month, or $2,220 per year. This is automatically deducted from your Social Security check. On top of that, you pay a $257 annual deductible before Part B coverage begins. After the deductible, you’re typically responsible for 20% of the Medicare-approved amount for most services, with no cap on how much that 20% can add up to over the course of a year.
That unlimited 20% coinsurance is one of the biggest financial risks in Original Medicare. A single outpatient surgery, a series of cancer treatments, or an extended course of physical therapy can push your out-of-pocket costs into the thousands. This is the main reason many people buy supplemental insurance.
Part D: Prescription Drug Coverage
Part D covers prescription medications through private insurance plans. Monthly premiums vary by plan and region but typically range from $0 to about $100. A major change took effect in 2025: there is now a hard cap of $2,000 per year on out-of-pocket drug costs. Before this cap existed, people taking expensive medications for cancer, autoimmune conditions, or other serious illnesses could face bills of $10,000 or more annually. The new limit also eliminates the old “donut hole” coverage gap that previously left people paying full price for drugs in a middle spending range.
If your plan’s premium is $30 per month, you’d spend $360 a year on premiums plus up to $2,000 in out-of-pocket costs, for a maximum of $2,360 on prescription drugs. Many people with modest medication needs will spend far less.
High-Income Surcharges
If your modified adjusted gross income exceeds $106,000 as an individual filer or $212,000 as a joint filer, Medicare charges extra for both Part B and Part D. These surcharges, called Income-Related Monthly Adjustment Amounts (IRMAA), are based on your tax return from two years prior.
The surcharges rise through five income tiers:
- $106,001 to $133,000 (individual): Part B jumps to $259/month, plus $13.70 added to your Part D premium
- $133,001 to $167,000: Part B is $370/month, plus $35.30 for Part D
- $167,001 to $200,000: Part B is $480.90/month, plus $57.00 for Part D
- $200,001 to $499,999: Part B is $591.90/month, plus $78.60 for Part D
- $500,000 or more: Part B reaches $628.90/month, plus $85.80 for Part D
At the highest tier, you’d pay over $8,500 per year in Part B and Part D surcharges alone, before any deductibles or copays. These thresholds apply to joint filers at double the individual amounts. One common surprise: a one-time income spike from selling a home, cashing out a retirement account, or receiving a large capital gain can trigger IRMAA surcharges two years later. You can appeal if your income has since dropped due to a life-changing event like retirement or the death of a spouse.
Medicare Advantage: An Alternative Cost Structure
Medicare Advantage plans (Part C) are offered by private insurers as a bundled alternative to Original Medicare. They replace Parts A and B and usually include drug coverage. According to KFF, 76% of Medicare Advantage enrollees pay no plan premium beyond the standard $185 Part B premium in 2025. The average premium across all enrollees, including those who pay nothing, is just $13 per month.
The trade-off is different cost-sharing. Medicare Advantage plans use copays and coinsurance for services, but they include an annual out-of-pocket maximum, which Original Medicare does not have. These maximums vary by plan, often landing between $3,000 and $8,000 for in-network care. You also typically need to use a network of doctors and may need referrals to see specialists. For people who want predictable costs and don’t mind network restrictions, Medicare Advantage can be significantly cheaper than Original Medicare paired with supplemental insurance.
Supplemental Insurance (Medigap)
If you stick with Original Medicare, a Medigap policy fills in the gaps, covering things like the 20% Part B coinsurance, the Part A hospital deductible, and skilled nursing coinsurance. The most popular plan, Plan G, covers nearly everything except the $257 annual Part B deductible. Plan N is a lower-cost option that covers most gaps but charges small copays for some office and emergency room visits.
Medigap premiums vary widely by insurer, your age, your location, and whether you smoke. The same Plan G policy from two different companies in the same city can differ by $100 or more per month. Typical costs range roughly from $100 to $300 per month depending on these factors, though prices in high-cost areas can be higher. You get the best rates and guaranteed acceptance if you enroll during the six-month window that starts when you turn 65 and are enrolled in Part B. Outside that window, insurers in most states can charge more or deny you coverage based on health conditions.
What a Typical Year Actually Costs
For someone with average income on Original Medicare without supplemental coverage, a baseline year looks like this: $2,220 in Part B premiums, $257 for the Part B deductible, plus 20% coinsurance on every doctor visit, lab test, and outpatient procedure. Add a Part D premium (perhaps $360 per year) and whatever you spend on medications up to the $2,000 cap. If you stay healthy and avoid the hospital, you might spend $3,000 to $4,000 total. A hospital stay could add $1,676 or more in a single bill.
With a Medigap plan, you’re more insulated. You’d pay the Part B premium ($2,220), a Medigap premium (perhaps $1,800 to $3,000 per year), the $257 Part B deductible, and your Part D costs. That’s roughly $4,500 to $7,500 per year, but you’re protected against large unexpected bills. With Medicare Advantage and no plan premium, your fixed costs drop to just the $2,220 Part B premium plus whatever copays and drug costs you incur during the year, with a ceiling set by the plan’s out-of-pocket maximum.
Late Enrollment Penalties
Delaying enrollment when you’re eligible can permanently increase your costs. The Part B penalty adds 10% to your monthly premium for every full 12-month period you were eligible but didn’t sign up. If you waited two years, your premium would be 20% higher for life. That turns the $185 standard premium into $222 per month, every month, for as long as you have Medicare.
Part D penalties work similarly but accumulate faster: 1% of the national base premium for every month you went without creditable drug coverage. That’s 12% per year of delay, and the penalty is also permanent. Part A penalties, for those who must buy coverage, add 10% to the premium for twice the number of years you delayed. The key exception for both Part B and Part D: if you had qualifying coverage through an employer or union during the gap, no penalty applies.
What Medicare Does Not Cover
Some of the most expensive healthcare needs in retirement fall outside Medicare entirely. Long-term custodial care, whether in a nursing home or through a home aide, is not covered. Medicare pays for skilled nursing only after a qualifying hospital stay, and only for up to 100 days. Dental care, routine vision exams, hearing aids, and most dental procedures are also excluded from Original Medicare, though many Medicare Advantage plans include some of these benefits. These gaps can represent tens of thousands of dollars in annual costs, particularly for long-term care, which averages over $100,000 per year in a nursing home setting.