Medicare Costs in 2027: Premiums, Deductibles, and Limits

A breakdown of Medicare Part A, Part B, Part D, Medigap, and Medicare Advantage costs—what’s confirmed for 2026 and what to watch for in 2027.

By the SeniorAffair.com Medicare Team · Reviewed for accuracy against CMS.gov and Medicare.gov

Medicare costs are made up of several separate pieces—Part A, Part B, Part D, and, depending on your path, either Medigap or Medicare Advantage cost-sharing. Here’s a breakdown of confirmed 2026 figures, what typically changes each fall, and what to watch for as CMS finalizes 2027 numbers ahead of Open Enrollment.

A note on timing: CMS typically announces final Part A, Part B, and Part D figures for the coming plan year in the fall, close to the start of the Annual Enrollment Period. The figures below reflect confirmed 2026 amounts; check back here or Medicare.gov directly once CMS finalizes 2027 numbers.

Part A Costs

Most beneficiaries qualify for premium-free Part A based on their own or a spouse’s work history, making Part B and Part D premiums the more consistently relevant costs to plan around.

Part B Costs

Income-Related Monthly Adjustment Amount (IRMAA)

Higher-income beneficiaries pay more than the standard Part B and Part D premiums. IRMAA is based on your modified adjusted gross income from two years prior (your 2025 tax return determines your 2027 IRMAA bracket) and is recalculated annually as income thresholds adjust. If your income has dropped since that reference year—due to retirement, a life-changing event, or other circumstances—you can request a reconsideration with Social Security using Form SSA-44 rather than paying the higher amount automatically.

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Part D Costs

See Medicare Part D Open Enrollment: Comparing Drug Plans for how the three-phase Part D cost structure works and how to compare plan-specific pricing.

Medicare Advantage Costs

You still pay the standard Part B premium (or your IRMAA-adjusted amount) even while enrolled in Medicare Advantage, since Part C is built on top of your existing Part A and B eligibility.

Medigap Costs

Medigap pricing methods vary by state—some insurers use “attained-age” pricing (premiums increase as you get older), others use “issue-age” pricing (premiums are based on your age when you first bought the policy and don’t increase due to age alone), and others use “community-rated” pricing (everyone in an area pays the same premium regardless of age). This distinction can meaningfully affect your long-term costs, so it’s worth asking an insurer directly which pricing method applies. See Medigap vs. Medicare Advantage: Which Costs Less? for the full cost tradeoff between Medigap and Medicare Advantage.

What Tends to Change Each Year

• The standard Part B premium and deductible—adjusted annually based on program costs
• The Part D out-of-pocket cap—indexed to Part D spending growth under the Inflation Reduction Act
• IRMAA income thresholds—adjusted for inflation
• Individual Medicare Advantage and Part D plan premiums, deductibles, and copays—set independently by each insurer
• Medicare Advantage plan availability—insurers can enter or exit specific counties from year to year

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Estimating Your Total Annual Cost

The single biggest budgeting mistake is comparing plans by premium alone. A complete estimate should include:

1. Monthly premiums (Part B, plus Part D or Medigap, plus any Medicare Advantage premium) × 12
2. Expected deductible spending based on your typical annual usage
3. Expected copay or coinsurance spending for routine visits, specialist visits, and any planned procedures
4. A buffer for unplanned care, capped at the plan’s annual out-of-pocket maximum if you have Medicare Advantage

Medicare.gov’s Plan Finder tool calculates this automatically once you enter your medications and expected usage, which is why it’s worth using directly rather than estimating by hand.

Where to Find the Final 2027 Numbers

CMS typically releases final Part A, Part B, and Part D cost figures for the upcoming plan year in the fall, ahead of the October 15 start of Open Enrollment. Once released, updated numbers are reflected on Medicare.gov and in each plan’s Annual Notice of Change letter, mailed by September 30. Check our main Open Enrollment guide for the latest confirmed figures as they’re announced.

Programs That Can Lower Your Costs

Several assistance programs can reduce Medicare costs for beneficiaries with limited income and resources, and none of them are tied to the Open Enrollment calendar—you can apply any time of year:

• Extra Help (Low-Income Subsidy): reduces or eliminates Part D premiums, deductibles, and copays for qualifying beneficiaries. Applied for through the Social Security Administration.
• Medicare Savings Programs: state-administered programs that can help pay Part B premiums and, in some cases Part A and B deductibles, copays, and coinsurance for beneficiaries who meet income and asset limits.
• Medicaid dual eligibility: beneficiaries who qualify for both Medicare and Medicaid often have most of their out-of-pocket Medicare costs are covered by Medicaid, and you typically gain access to a monthly Special Enrollment Period as well—see Medicare Special Enrollment Periods: Do You Qualify?.

If your income is close to any of these program thresholds, it’s worth checking eligibility even if you don’t think you’ll qualify—the income and asset limits are often higher than people assume, and state Medicare Savings Program limits can differ from the federal Extra Help thresholds.

A Worked Cost Comparison

Consider a hypothetical beneficiary paying the standard 2026 Part B premium of $202.90/month ($2,434.80/year), a $35/month Part D plan ($420/year) with $400 in annual drug copays, and occasional specialist visits. Under Original Medicare alone (no Medigap), unpredictable 20% coinsurance on specialist and outpatient costs could add anywhere from a few hundred to several thousand dollars depending on the year. Adding a Medigap Plan G at roughly $150/month ($1,800/year) would push total fixed costs higher but cap nearly all of that coinsurance exposure. A $0-premium Medicare Advantage plan, by contrast, would eliminate the Medigap line entirely but introduce per-visit copays and coinsurance up to the plan’s annual out-of-pocket maximum. Running this kind of side-by-side estimate with your own real numbers—rather than a hypothetical—is exactly what Medicare.gov’s Plan Finder tool is built to do.

Costs That Are Easy to Overlook

• Out-of-network costs under Medicare Advantage HMO plans, which can mean paying the full cost of a service if you see a provider outside the network without authorization
• Specialty drug coinsurance before you reach the Part D catastrophic phase, which can be a meaningful percentage of a high-cost medication’s price
• Skilled nursing facility coinsurance for stays beyond 20 days, which applies under both Original Medicare and Medicare Advantage plans, though the exact daily amount can differ
• Dental and vision costs under Original Medicare, since routine care in these categories isn’t covered at all without a separate supplemental policy

Building Your Own Annual Cost Estimate

Rather than relying on national averages, the most reliable estimate uses your actual medications, your actual providers, and your realistic usage pattern from the past year or two as a guide. Someone who visited a specialist four times last year should assume something similar next year unless a health change suggests otherwise, and someone who filled the same three prescriptions monthly for years should carry that forward too. Once you’ve compared that realistic estimate across two or three plans using the Open Enrollment checklist, you’ll have a far more accurate picture than any generic “average Medicare beneficiary spends $X” statistic could give you.

Bottom Line

Medicare’s cost structure has several moving parts, but the core levers are the same every year: your Part B premium (and possible IRMAA surcharge), your choice between Medigap-covered predictability and Medicare Advantage-style variable cost-sharing and your Part D drug plan’s specific formulary and deductible. Reviewing all three together during Open Enrollment, rather than in isolation, is what actually catches the overpayment most beneficiaries never notice.

Frequently Asked Questions

More in This Medicare Open Enrollment Guide

• Medicare Open Enrollment 2027: The Complete Guide
• Medicare Advantage vs. Original Medicare: How to Decide
• How to Switch Medicare Advantage Plans During Open Enrollment
• Medicare Part D Open Enrollment: Comparing Drug Plans
• Medigap vs. Medicare Advantage: Which Costs Less?
• Medicare Open Enrollment Deadlines and Penalties
• Medicare Advantage Star Ratings Explained
• Medicare Special Enrollment Periods: Do You Qualify?
• Medicare Costs in 2027: Premiums, Deductibles, and Limits
• Medicare Open Enrollment Checklist: 10 Questions to Ask

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