Medicare Part C, also called Medicare Advantage, often has a $0 monthly plan premium, but it is not free. Nearly all Medicare beneficiaries (99%) have access to at least one $0-premium Medicare Advantage plan in 2025, which makes these plans easy to find. However, you still owe your monthly Part B premium, and you’ll face copayments, coinsurance, and deductibles when you use medical services.
What “$0 Premium” Actually Means
When a Medicare Advantage plan advertises a $0 premium, it means the plan itself charges no additional monthly fee on top of what you already pay for Medicare. But every Part C enrollee must continue paying the standard Part B premium, which is $185 per month in 2025 and rises to $202.90 in 2026. That Part B premium is the baseline cost of being in Medicare at all, and enrolling in a Part C plan doesn’t eliminate it.
So even with a “$0 premium” Medicare Advantage plan, you’re paying at least $185 per month in 2025 just to maintain your coverage.
Costs You’ll Pay When You Use Care
The monthly premium is only one piece of the cost picture. Medicare Advantage plans charge you at the point of care through three main mechanisms: deductibles, copayments, and coinsurance. A deductible is the amount you pay before your plan starts covering costs. A copayment is a flat fee per visit or service (for example, $30 for a doctor’s appointment). Coinsurance is a percentage of the total bill you’re responsible for, often 20%.
Each plan sets its own amounts for these costs, and they can vary widely. Two $0-premium plans in the same city might charge very different copays for a specialist visit or a hospital stay. The plan decides how much you owe for covered drugs, medical services, and supplies. This is why comparing plans on premium alone can be misleading. A plan with no monthly premium might have higher copays or a larger deductible than one charging $20 or $40 per month.
When evaluating plans, consider how often you see doctors, whether you need specialists, what prescriptions you take, and whether your preferred providers are in the plan’s network. All of these factors affect what you’ll actually spend in a year.
Out-of-Pocket Maximums Provide a Ceiling
One financial protection Medicare Advantage offers that Original Medicare does not is a yearly cap on your spending. Once you hit your plan’s maximum out-of-pocket limit, the plan covers 100% of your Part A and Part B services for the rest of the year.
For 2025, CMS sets the rules for these caps. HMO plans can set their in-network maximum anywhere from $0 to $9,350. PPO plans have both in-network limits (up to $9,350) and combined in-network-plus-out-of-network limits that can reach $14,000. Many plans voluntarily set their caps well below these mandatory ceilings, with lower-tier plans capping spending as low as $4,150.
This ceiling matters most if you have a serious illness or injury. Under Original Medicare, there is no out-of-pocket maximum, so a major hospitalization can leave you responsible for 20% coinsurance with no upper limit unless you carry supplemental insurance.
Out-of-Network Care Can Cost More
If your plan uses a network (most do), seeing doctors or hospitals outside that network typically costs more, and some plan types won’t cover out-of-network care at all. HMO-style Medicare Advantage plans generally require you to stay in-network except for emergencies. PPO plans allow out-of-network care but charge higher copays and coinsurance for it, and the out-of-pocket maximum for combined in-network and out-of-network spending can be significantly higher than the in-network-only cap.
Before enrolling, check that your current doctors, hospitals, and specialists participate in the plan’s network. Switching to an out-of-network provider mid-year can dramatically increase your costs. Some services also require prior authorization, meaning the plan must approve the care before it’s covered.
Prescription Drug Costs
Most Medicare Advantage plans bundle prescription drug coverage (Part D) into the plan. While this is convenient, it adds another layer of cost-sharing. Plans set their own drug deductibles, copayments, and formularies (the list of drugs they cover). A medication that costs $10 on one plan might cost $45 on another, or might not be covered at all.
If you take multiple prescriptions, comparing drug costs across plans can be more important than comparing premiums. Medicare’s plan finder tool lets you enter your specific medications and see estimated yearly costs for each plan available in your area.
The Part B Giveback Benefit
Some Medicare Advantage plans offer a Part B premium reduction, sometimes called a “giveback benefit,” that pays back a portion of your monthly Part B premium. The reduction can range from as little as 10 cents to the full $202.90 (in 2026). This credit shows up as a lower deduction from your Social Security check or a reduced invoice from Medicare. It’s not paid as cash or a gift card.
This benefit is only available through certain Medicare Advantage plans in specific states and counties, so it’s not universally accessible. But for those who qualify, it’s the closest a Part C plan gets to truly reducing your fixed monthly costs. If a plan offers both a $0 plan premium and a full Part B giveback, your net monthly premium payment could effectively reach $0, though you’d still face cost-sharing when you receive care.
How to Evaluate the True Cost
The real cost of a Medicare Advantage plan is your total yearly spending: premiums plus all the copays, coinsurance, deductibles, and drug costs you accumulate over 12 months. A $0-premium plan is genuinely cheaper for someone who rarely sees a doctor and takes no medications. But for someone managing a chronic condition, a plan with a modest monthly premium and lower copays could save hundreds or thousands of dollars over the year.
Plans send two key documents each fall that lay out exactly what you’ll pay: the Annual Notice of Change, which flags any cost or coverage shifts for January, and the Evidence of Coverage, which details every copay, coinsurance rate, and coverage rule. Reviewing these before Open Enrollment closes gives you the clearest picture of what “free” will actually cost you.