Medicare Costs in 2026: Premiums, Deductibles and Coinsurance

Four Cost Terms to Know First

• Premium: what you pay every month to have coverage, whether or not you use it.
• Deductible: what you pay for covered care before Medicare starts paying its share.
• Coinsurance: your share of a bill as a percentage, such as 20%.
• Copayment: a set dollar amount for a service, such as a fixed amount per visit.

Part B Costs in 2026

Part B covers doctors, outpatient care, lab work, preventive services and medical equipment. Everyone who has Part B pays a premium.

If you get Social Security benefits, the Part B premium is usually taken out of your check. If your 2024 modified adjusted gross income was above $109,000 (single) or $218,000 (married filing jointly), you pay more. Our IRMAA guide has the full 2026 table, and the IRMAA calculator runs your number.

Sign up late without a Special Enrollment Period and a penalty is added: 10% of the standard premium for each full 12-month period you went without Part B. See late enrollment penalties.

Part A Costs in 2026

Part A covers inpatient hospital stays, skilled nursing facility care after a qualifying hospital stay, hospice and some home health care. Most people pay no premium because they or a spouse paid Medicare taxes long enough while working, generally at least 10 years.

The benefit period trap

The Part A deductible is charged per benefit period, not per year. A benefit period starts the day you are admitted as an inpatient and ends when you have gone 60 days in a row without inpatient hospital or skilled nursing care. Two separate hospital stays in one year can mean paying $1,736 twice. After day 150 in a benefit period, you pay all costs. The Part A premium check tells you whether you are likely to owe a Part A premium at all.

Why Original Medicare Has No Cap

Medicare.gov is direct about it: there is no yearly limit on what you pay out of pocket with Original Medicare unless you have supplemental coverage. The 20% Part B coinsurance has no ceiling, so a year with surgery, chemotherapy or dialysis can produce a large bill. Original Medicare also does not cover most outpatient prescription drugs; that is Part D, with its own costs, explained in our Part D guide.

How People Fill the Gaps

Most people on Medicare use one of these approaches:

• Original Medicare plus Medigap plus Part D. A Medigap policy pays some or all of the deductibles and coinsurance above. Premiums are higher and predictable. High-deductible Plan G (and F, for people eligible before 2020) carries a deductible of $2,950 in 2026 and $3,050 in 2027 before the policy pays.
• Medicare Advantage. A private plan replaces how you receive Parts A and B, usually includes drug coverage, and has a yearly out-of-pocket maximum for in-network care. CMS sets a ceiling on that maximum each year, and plans can set theirs lower.
• Other coverage. Employer retiree coverage, Medicaid or a Medicare Savings Program. If money is tight, our guide to Medicaid, Medicare Savings Programs and Extra Help lists the 2026 limits.

Choosing between the first two is the biggest decision most people make at 65. We compare them, with Idaho’s rules, in Medicare Advantage vs. Medigap in Idaho.

What About 2027?

As of this guide’s review date, CMS has not announced the 2027 Part B premium, the 2027 Part B deductible or the 2027 Part A amounts. CMS usually publishes them in the autumn, and we will update this guide when it does. The 2027 figures that are already official are for Part D (a $700 maximum deductible and a $2,400 out-of-pocket threshold) and the Medigap high-deductible amount ($3,050).

Frequently Asked Questions

Related Guides

• Who Is Eligible for Medicare? Age, Disability and Sign-Up RulesWho qualifies at 65 or earlier, who is enrolled automatically, and who has to sign up.
• Medicare Enrollment Periods: Every Window, Date and DeadlineIEP, Open Enrollment, the MA Open Enrollment Period, GEP, SEPs and Medigap open enrollment.
• Medicare Advantage vs. Medigap in Idaho: How to ChooseNetworks, costs, drug coverage, and Idaho’s 63-day Medigap birthday rule.
• Medicare Part D Explained: Coverage, Costs and the Out-of-Pocket CapThe 2026 and 2027 deductible and cap, $35 insulin, and how to compare drug plans.
• IRMAA Explained: Medicare’s Income-Related Premiums for 2026The 2026 income brackets, what each adds to Part B and Part D, and how to appeal.
• Medicare Late Enrollment Penalties: Part A, Part B and Part DHow each penalty is calculated, how long it lasts, and how to avoid it.
• Turning 65 in Idaho: A Step-by-Step Medicare ChecklistWhat to do before, during and after your 65th-birthday month.
• Working Past 65: How Medicare Works With Employer CoverageWho pays first, when delaying Part B is safe, HSAs, and the 8-month window.
• Medicaid, Medicare Savings Programs and Extra Help in IdahoThe 2026 income and resource limits for help with Medicare and drug costs.
• How to Check Your Doctors and Drugs Before Choosing a Medicare PlanA practical method for networks, formularies, pharmacies and yearly cost.

Coverage pages for this topic: Medicare Advantage · Medicare Supplement · Medicare Part D. Other topics in the Learning Center: Health Insurance (ACA), Life Insurance, Final Expense, Annuities, Long-Term Care, Disability Insurance, Supplemental Health, Short-Term Medical, Travel Insurance.