Medicare costs include monthly premiums, deductibles, copays, and prescription costs that vary depending on which coverage structure you choose. The best way to avoid surprises is to estimate your total annual cost based on your actual healthcare usage and medication list, not just the monthly premium. A complete picture prevents the gap between what you expected to pay and what you actually owe.
Key Takeaways
- Monthly premiums are only the starting point, not the full cost of Medicare
- Drug coverage can be one of the largest and most variable cost categories depending on what you take
- Your total annual cost including all components matters more than any single line item
- Medicare costs interact with your retirement income plan in ways that deserve annual attention
The Main Medicare Cost Categories
Premiums
Medicare premiums come from multiple sources, and the total depends on your coverage structure and income level.
Part A, which covers inpatient hospital care, carries no premium for most beneficiaries who worked and paid Medicare taxes for at least ten years. Those who do not meet the work history threshold pay a premium that can reach up to $518 per month in 2026.
Part B, which covers outpatient care and physician services, carries a standard premium of $202.90 per month in 2026. Higher-income beneficiaries pay more through IRMAA surcharges applied on a sliding scale above specific income thresholds. In 2026, IRMAA surcharges begin for single filers with income above $109,000 and joint filers above $218,000. The surcharge is based on your modified adjusted gross income from two years prior, meaning income in 2024 determines your 2026 Part B premium.
Part D, the prescription drug plan, carries its own monthly premium that varies by plan and location. The projected average Part D plan premium for 2026 is approximately $34.50 per month, though individual plan premiums vary above and below that figure. Higher-income beneficiaries also pay IRMAA surcharges on Part D premiums.
Retirees who add a Medigap supplemental policy to original Medicare pay an additional monthly premium to the private insurance company, commonly ranging from $100 to $250 or more per month depending on plan type, state, and insurer. Medicare Advantage plans charge their own monthly premium in addition to Part B, with many plans offering zero-dollar additional premiums, though the national average is higher.
Adding all premium components produces a total monthly premium figure that can range from under $300 per month for a Medicare Advantage enrollee with no IRMAA exposure to $600 or more per month for a beneficiary on original Medicare with Medigap, high-income IRMAA surcharges, and a stand-alone Part D plan.
Deductibles and Cost-Sharing
Deductibles and cost-sharing represent what you pay at the time of care and accumulate throughout the year based on your healthcare utilization.
Medicare Part A has a hospital inpatient deductible of $1,736 per benefit period in 2026. This deductible applies per benefit period, not per calendar year, which means a second hospital admission in the same year following a discharge of 60 days or more triggers a second deductible. Days 61 through 90 of a hospital stay carry daily coinsurance of $434, and days beyond 90 carry even higher daily coinsurance for the 60 lifetime reserve days.
Medicare Part B carries an annual deductible of $283 in 2026, after which Medicare pays 80% of covered services and the beneficiary pays 20% coinsurance with no annual out-of-pocket maximum under original Medicare alone. For a beneficiary with frequent specialist visits, outpatient procedures, or significant outpatient care needs, this 20% coinsurance accumulates throughout the year.
Medigap policies, depending on the plan letter chosen, cover some or all of these deductibles and coinsurance amounts. Plan G, the most commonly purchased Medigap plan for new enrollees, covers everything above except the Part B deductible, leaving the beneficiary responsible for $283 per year plus the monthly premium. Plan N covers most cost-sharing with small copays for some office and emergency room visits. Without a Medigap policy, original Medicare has no annual cap on cost-sharing, which is the most significant financial exposure in the coverage structure.
Medicare Advantage plans set their own deductibles and copay structures, which vary by plan. They are required to cap annual in-network out-of-pocket costs at a federally mandated maximum of $9,250 in 2026. Individual plans can set lower caps, and average caps across the market tend to be meaningfully below the federal maximum.
Out-of-Pocket Maximums
Under original Medicare without supplemental coverage, there is no annual out-of-pocket maximum. A beneficiary with significant medical needs could theoretically face unlimited cost-sharing in a given year. This is one of the primary reasons most original Medicare enrollees add either a Medigap policy or a Medicare Advantage plan, both of which provide some limit on annual exposure.
Medigap policies like Plan G effectively cap most cost-sharing to the $283 Part B deductible, since the policy covers the remaining cost-sharing, though the cap is achieved through coverage rather than a defined maximum. Medicare Advantage plans explicitly cap in-network out-of-pocket spending at the plan’s defined maximum, which must not exceed $9,250 in 2026.
Understanding your out-of-pocket maximum is the most important single figure for stress-testing your healthcare budget. The question to ask is not whether you can afford typical annual healthcare costs. It is whether you can absorb the maximum cost-sharing in a year with a major health event, without disrupting your retirement income plan.
Prescription Costs
Part D prescription costs depend on the plan’s formulary, the cost tier of each drug, the pharmacy used, and your total annual drug spending relative to the $2,100 out-of-pocket cap in 2026.
In the initial coverage phase, you pay copays or coinsurance at the tier level assigned to each medication. Generic drugs in Tier 1 typically carry copays of a few dollars. Preferred brand-name drugs in Tier 3 commonly carry copays of $40 to $50 per fill. Non-preferred brand and specialty drugs in higher tiers carry larger copays or coinsurance percentages.
Once your total out-of-pocket drug spending reaches $2,100 in 2026, the plan pays 100% of covered drug costs for the rest of the year. This cap, significantly reduced from prior years, provides meaningful protection for retirees taking expensive specialty medications.
Medicare Advantage plans with integrated drug coverage follow similar tier and cap structures. The specific formulary, tier placement of your medications, and preferred pharmacy network are plan-specific and must be verified against your actual medication list when comparing plans.
How to Estimate Your Real Yearly Cost
Best-Case vs. Typical vs. High-Usage Scenarios
A complete Medicare cost estimate uses three scenarios rather than a single number.
The best-case scenario reflects a healthy year with primarily routine care: a few primary care visits, standard labs, a specialist visit or two, and no unexpected procedures. In this scenario, total annual cost approximates your annual premium plus modest cost-sharing and drug costs.
The typical scenario reflects average utilization for someone of your age and health status: regular specialist visits for managed conditions, ongoing prescriptions at current cost tiers, periodic imaging or lab work, and perhaps one procedure or minor hospitalization. This scenario produces a more realistic annual cost estimate that accounts for the healthcare you actually use.
The high-usage scenario reflects a significant health event: a surgery, an extended hospitalization, or the development of a new condition requiring new specialist care and medications. This scenario tests whether your retirement income plan can absorb the cost-sharing maximum plus any uncovered expenses in a single year without creating financial hardship.
Building your retirement healthcare budget around the typical scenario with a buffer that can absorb the high-usage scenario, without treating the high-usage scenario as the baseline, produces a realistic and defensible planning figure.
Include Travel and Out-of-Network Possibilities
For Medicare Advantage enrollees, out-of-network care can be significantly more expensive or uncovered entirely depending on the plan type. If you travel frequently, spend time in multiple states, or rely on a specialist located outside your plan’s network, model the cost of that care in your annual estimate. A single out-of-network specialist visit or urgent care episode while traveling can add hundreds of dollars to your annual out-of-pocket total.
For original Medicare enrollees, any Medicare-accepting provider is in-network nationwide, which eliminates geographic cost variability for covered services. However, services not covered by Medicare, such as dental work, vision, or hearing care needed while traveling, carry the same out-of-pocket exposure wherever you receive them.
How Medicare Costs Fit Into Retirement Planning
Coordinating With Social Security Start Date
The timing of your Social Security claim affects when and how your Medicare premiums are collected. Once you begin receiving Social Security benefits, Medicare Part B premiums are automatically deducted from your monthly payment. Before you begin Social Security, Medicare sends you a bill directly for Part B premiums on a quarterly basis.
IRMAA surcharges are also deducted from Social Security payments when applicable, which means a higher-income year that triggers IRMAA can reduce the net Social Security benefit received two years later. For retirees planning to delay Social Security to maximize the benefit, understanding how Medicare billing works before Social Security begins prevents administrative surprises.
For retirees who retire before age 65 and delay Medicare enrollment through employer coverage or a Special Enrollment Period, the gap years between retirement and Medicare eligibility carry their own premium structure that can be significantly higher. Bridge coverage through COBRA, marketplace plans, or a spouse’s employer plan represents a separate and often substantial cost that belongs in the retirement income plan.
Planning for Annual Review Season
Medicare costs are not static. Every year on January 1, plan premiums, formularies, copay structures, and network compositions can change. The Annual Open Enrollment Period from October 15 to December 7 is the window to review your current plan, compare alternatives, and make changes that take effect January 1.
The Annual Notice of Change, sent by your plan each fall before open enrollment begins, discloses what is changing in your current coverage for the coming year. This notice deserves careful reading even in years when you intend to stay in your current plan, because formulary changes that raise the cost tier of your medications or network changes that affect your doctors can significantly alter your actual annual cost without any action on your part.
Build the Annual Open Enrollment review into your annual financial planning calendar as a standing event, not an optional exercise.
Planning for Income-Related Changes
Because IRMAA surcharges are based on income from two years prior, any year with unusually high income creates Medicare cost implications that arrive two years later. Large Roth conversions, home sales, business income events, significant capital gains, or the first year of RMDs can all push income above IRMAA thresholds in ways that affect Medicare premiums in subsequent years.
Anticipating these implications before they occur gives you the opportunity to model different income scenarios and adjust timing where possible to manage the IRMAA impact. For example, understanding that a planned Roth conversion in a given year will push income into a higher IRMAA tier can inform whether to adjust the conversion amount, split it across years, or accept the IRMAA cost as the price of the conversion benefit.
Your financial advisor and CPA should be jointly aware of planned income events that could affect IRMAA, so the Medicare cost impact is factored into the analysis alongside the tax and investment implications.
FAQs
For a typical Medicare beneficiary on original Medicare with Medigap and a Part D plan, monthly costs include the Part B premium of $202.90 in 2026, a Medigap plan premium that commonly ranges from $100 to $250 or more depending on plan type and location, and a Part D plan premium that averages around $34.50. Combined, this structure commonly produces total monthly premiums of $350 to $500 or more before IRMAA surcharges. For Medicare Advantage enrollees without IRMAA, total monthly premiums may be lower, often $203 to $300, since many Advantage plans have zero-dollar additional premiums and drug coverage is bundled. IRMAA surcharges for higher-income beneficiaries add to either structure based on the applicable income bracket.
Start with your expected healthcare utilization based on your actual health conditions and care pattern. Estimate the number of primary care visits, specialist visits, lab or imaging studies, and any planned procedures. Apply the copay or coinsurance amount from your specific plan to each type of service. Add your estimated annual drug costs from Medicare's Plan Finder using your actual medication list. Sum the results and add a buffer of 20% to 25% for unpredictable expenses. Compare your estimate to your plan's out-of-pocket maximum and confirm that your retirement income plan can absorb that maximum if a significant health event occurs.
Not automatically. Original Medicare, Parts A and B, does not include prescription drug coverage. To get drug coverage on original Medicare, you must enroll in a separate Part D plan. Most Medicare Advantage plans include integrated prescription drug coverage, called MA-PD plans, which eliminates the need for a separate Part D plan. Some Medicare Advantage plans do not include drug coverage, which would require a separate Part D enrollment. When evaluating any plan, confirm whether drug coverage is included, and if so, verify that your specific medications are covered at acceptable tiers on that plan's formulary.
Mid-year prescription changes can affect your out-of-pocket drug costs in the current year and may make a different plan more cost-effective at the next Annual Open Enrollment Period. If a new medication is not on your current plan's formulary, you may be able to request a formulary exception, try a formulary alternative as directed by your prescriber, or pay out-of-pocket until the next enrollment period. If you lose access to a plan that covers your current medications because the plan is discontinued, a Special Enrollment Period may allow you to switch mid-year. Document prescription changes throughout the year and use them as inputs when comparing plans during the fall open enrollment period.
For Medicare Advantage plans, verify the current in-network status of every physician, specialist, and hospital you see or expect to use before enrolling. Call the plan directly or check the plan's online directory, confirming current participation for the specific calendar year rather than relying on a prior year's directory. Ask each provider's billing office directly whether they currently participate in the plan. Providers can leave networks, so confirmation at the time of enrollment is more reliable than directory information that may not be fully current. For original Medicare with Medigap, any Medicare-accepting provider is accessible without network restrictions, which eliminates this verification requirement.
Yes. IRMAA surcharges on Part B and Part D premiums are recalculated annually based on your modified adjusted gross income from two years prior. A year with significantly higher income from any source, including retirement account withdrawals, investment gains, home sales, or business income, can move you into a higher IRMAA bracket two years later. Conversely, if your income drops significantly after a qualifying life event, you can request that the Social Security Administration use more current income information by filing Form SSA-44. Changes in income also affect how much of your Social Security benefit is subject to federal income tax, which interacts with your overall healthcare budget through the IRMAA channel.
Planning around premium alone and ignoring the cost-sharing structure is the most common and most consequential Medicare budgeting mistake. A plan with a zero-dollar monthly premium and an out-of-pocket maximum of $8,000 carries the same potential annual cost liability as a plan with a $250 monthly premium and a $5,000 out-of-pocket maximum, depending on how much care you use. Failing to model actual annual cost under different utilization scenarios means the budget is built on an assumption that may bear no relationship to what you actually spend. The second most common mistake is not reviewing the plan annually, allowing formulary changes, network shifts, and premium increases to take effect without a deliberate decision about whether to stay or switch.
Yes, without exception. Plan details change every January 1, and your own healthcare needs change over time. The Annual Open Enrollment Period from October 15 to December 7 is the right time to review your current coverage, compare it against available alternatives, and make a deliberate choice about whether to stay or switch. Read the Annual Notice of Change your plan sends before open enrollment. Run your current medications through Medicare's Plan Finder to confirm coverage and costs. Verify that your doctors remain in-network. And update your retirement healthcare budget to reflect any premium changes, formulary updates, or cost-sharing adjustments that will apply in the coming year. This annual review takes a few hours and can save hundreds to thousands of dollars annually if it prompts a well-timed plan change.
Build a Healthcare-Ready Retirement Plan
Healthcare costs are one of the most predictable and most underplanned expenses in retirement. If you want to make sure your Medicare costs are properly estimated and integrated into your retirement income plan, schedule a complimentary consultation with a CFP® professional at Bauman Wealth Advisors. We will help you build a realistic annual healthcare budget, anticipate IRMAA implications, and make sure your plan accounts for what Medicare actually costs at your income level and health situation.
