Medicare is not completely free when you turn 65, but one major piece of it typically comes at no cost. Most people pay $0 for Part A (hospital coverage) because they or a spouse paid Medicare taxes during their working years. Every other part of Medicare, including doctor visits, prescription drugs, and supplemental coverage, carries monthly premiums, deductibles, or both.
What You Get for Free: Part A
Part A covers hospital stays, skilled nursing care, and hospice. You qualify for premium-free Part A if you or your spouse earned at least 40 quarters of work credits through payroll taxes. That translates to roughly 10 years of employment. Most people turning 65 have met this threshold without realizing it.
Even with no monthly premium, Part A is not free to use. Each time you’re admitted to the hospital, you pay a deductible of $1,676 in 2025 before coverage kicks in. If your hospital stay stretches beyond 60 days, you start paying $419 per day for days 61 through 90. Stays longer than that cost $838 per day, drawn from a limited pool of “lifetime reserve days.” These costs are per benefit period, not per year, so multiple hospitalizations in the same year can each trigger a new deductible.
If you don’t have enough work credits, you can still buy into Part A, but the premium is steep. And if you delay signing up past your initial enrollment window, a 10% penalty gets added to your premium for twice the number of years you went without coverage.
Part B: The Premium Nearly Everyone Pays
Part B covers doctor visits, outpatient care, lab tests, and preventive screenings. It is never free. The standard monthly premium in 2025 is $185.00, and it’s deducted directly from your Social Security check if you’re already collecting benefits.
Higher earners pay more. Medicare uses your tax return from two years prior to determine whether you owe an income-related surcharge on top of the standard premium. This adjustment, known as IRMAA, kicks in at specific income thresholds and can add hundreds of dollars per month.
Part B also has an annual deductible you pay before coverage begins, plus a standard 20% coinsurance on most services after that. There’s no out-of-pocket maximum built into original Medicare, which is why many people add supplemental insurance.
Part D: Prescription Drug Coverage
Medicare doesn’t bundle prescription drug coverage into Parts A or B. You need to enroll in a separate Part D plan sold by private insurers. Monthly premiums vary by plan and location, but every plan carries some combination of premiums, copays, and deductibles. Starting in 2025, a provision in the Inflation Reduction Act caps your total out-of-pocket drug spending at $2,000 per year.
Skipping Part D when you’re first eligible is costly. For every month you go without creditable drug coverage (63 or more consecutive days), Medicare tacks on a penalty of 1% of the national base beneficiary premium, which is $38.99 in 2026. That penalty gets added to your monthly premium permanently, for as long as you have drug coverage. Ten months without coverage, for example, would add roughly $3.90 per month to your premium for life.
Medicare Advantage: The $0 Premium Option
Medicare Advantage plans (Part C) are an alternative to original Medicare, offered by private insurers. About 76% of enrollees in individual Medicare Advantage plans with drug coverage pay no additional premium beyond the $185 Part B premium. These plans often bundle hospital, doctor, drug, and sometimes dental and vision coverage into one package.
The trade-off is that you’re working within a provider network, and nearly all Medicare Advantage plans (99%) require prior authorization for some services. There’s also an out-of-pocket maximum, which can’t exceed $9,350 for in-network care in 2025. The average enrollee’s in-network limit is around $5,320. That ceiling doesn’t exist in original Medicare without supplemental coverage, so for some people, Advantage plans offer more financial predictability even if they’re not truly “free.”
Medigap: Filling the Gaps in Original Medicare
If you stick with original Medicare (Parts A and B), you’re responsible for deductibles, coinsurance, and that uncapped 20% on Part B services. Medigap policies, also called Medicare Supplement plans, cover some or all of those costs. They’re sold by private insurers and come in standardized letter plans (G, N, etc.) so benefits are identical across companies, but prices vary widely based on your age, location, and the insurer.
The best time to buy Medigap is during your six-month open enrollment window, which starts when you’re both 65 and enrolled in Part B. During that window, insurers can’t charge you more or deny you based on health conditions. Outside that period, medical underwriting applies in most states, meaning preexisting conditions can affect both your eligibility and price.
Late Enrollment Penalties
Missing your initial enrollment window doesn’t just delay coverage. It can permanently raise what you pay. The Part B penalty adds 10% to your monthly premium for each full year you could have signed up but didn’t. Someone who waits three years past eligibility would pay 30% more every month, and that surcharge stays on their premium for life.
The Part D penalty works similarly but compounds faster: 1% of the base premium for every uncovered month, also permanent. These penalties don’t go away if you switch plans. The only exception is if you had qualifying coverage through an employer or union plan during the gap.
Help for Lower Incomes
If your income and savings are limited, Medicare Savings Programs can pay some or all of your Medicare costs. The Qualified Medicare Beneficiary (QMB) program covers Part A and B premiums, deductibles, and coinsurance for individuals earning up to $1,350 per month with resources under $9,950 (2026 figures). Married couples qualify at up to $1,824 per month with $14,910 in resources.
Two other programs help at slightly higher income levels. The Specified Low-Income Medicare Beneficiary (SLMB) program covers Part B premiums for individuals earning up to $1,616 per month. The Qualifying Individual (QI) program extends that to $1,816 per month. Both use the same resource limits. Income thresholds are higher in Alaska and Hawaii, and some states set their own limits above the federal floor.
What You’ll Actually Pay at 65
For a typical person turning 65 with enough work history, here’s the realistic monthly picture: $0 for Part A, $185 for Part B, plus a Part D drug plan premium and either a Medigap policy or a Medicare Advantage plan. The total ranges from under $200 a month if you choose a $0-premium Advantage plan, to $400 or more if you go with original Medicare plus Medigap plus a standalone drug plan.
On top of premiums, you’ll face deductibles and cost-sharing when you actually use care. The Part A hospital deductible alone is $1,676 per admission in 2025. Without supplemental coverage, a serious illness or hospital stay can generate thousands in out-of-pocket costs. Medicare at 65 is far more affordable than buying individual insurance on the open market, but calling it free would overstate what most people experience.