Introduction
What will Medicare Part B cost in 2027? Many people nearing 65 struggle to pin down a single number because the answer has three moving parts: a standard monthly premium, an annual deductible, and an income-related surcharge for higher earners.
One caution first. As of November 10, 2026, no official 2027 Part B premium, deductible, or IRMAA table appeared in CMS or Medicare.gov releases. The 2027 numbers below come from the Medicare Trustees' projections and are labeled as projections. The 2026 figures are official and serve as a baseline.
This guide covers:
- The standard premium and annual deductible
- IRMAA for higher earners
- Enrollment at 65
- How Medicare Advantage and Medigap change your total
- How to build and verify your own budget
Key Takeaways
- Projected 2027 Part B: $209.50/month and a $292 deductible (not final).
- IRMAA is usually based on your 2025 tax return.
- Part B and Part D can each carry an IRMAA surcharge.
- Medicare Advantage does not erase the Part B premium.
- Verify final numbers on your Social Security and plan notices.
2027 Medicare Part B Costs: Premium, Deductible & IRMAA
Part B isn't one price for everyone. Most people pay the standard premium. Higher earners pay that amount plus IRMAA, the Income-Related Monthly Adjustment Amount.
| Year | Standard monthly premium | Annual deductible | Status |
|---|---|---|---|
| 2026 | $202.90 | $283 | Official, CMS, November 14, 2025 |
| 2027 | $209.50 | $292 | Projection only, 2026 Trustees Report |
CMS announced the 2026 rates in mid-November 2025, so final 2027 figures are expected in the fall of 2026.
What Part B covers
Part B covers physician services, outpatient hospital care, diagnostic tests such as X-rays, many preventive services, certain home health services, and durable medical equipment. After the deductible, you generally pay 20% of the Medicare-approved amount. Some preventive services are exceptions. That cost-sharing is separate from the premium.
What IRMAA is
IRMAA is an extra charge added when your modified adjusted gross income (MAGI) exceeds set thresholds. It can apply to Part B and, separately, to Part D drug coverage. The Part D surcharge is added to your plan premium, including Medicare Advantage drug coverage.
Your cost layers
- Standard Part B premium
- Annual Part B deductible
- IRMAA surcharge (Part B and/or Part D)
- Part D plan premium
- Medigap or Medicare Advantage premium
- Late-enrollment penalty, if any
What Determines Your 2027 Medicare Part B Costs?
Income thresholds and the two-year lookback
Social Security usually uses your tax return from two years earlier, so 2027 normally means tax year 2025. If that return isn't available, it can use older data and correct the determination later. Your notice tells you which return was used.
The latest published thresholds are for 2026. Confirm 2027 figures with CMS or Social Security once they are released.
| Single MAGI | Joint MAGI | Part B surcharge | Part D surcharge |
|---|---|---|---|
| Up to $109,000 | Up to $218,000 | $0 | $0 |
| $109,000 to $137,000 | $218,000 to $274,000 | $81.20 | $14.50 |
| $137,000 to $171,000 | $274,000 to $342,000 | $202.90 | $37.50 |
| $171,000 to $205,000 | $342,000 to $410,000 | $324.60 | $60.40 |
| $205,000 to under $500,000 | $410,000 to under $750,000 | $446.30 | $83.30 |
| $500,000+ | $750,000+ | $487.00 | $91.00 |
Married filing separately and living with your spouse: over $109,000 and under $391,000 adds $446.30 (Part B) and $83.30 (Part D). At $391,000 or more, it's $487.00 and $91.00. All amounts are monthly.
What counts as MAGI
For IRMAA, MAGI is adjusted gross income plus tax-exempt interest. Wages, pensions, taxable retirement withdrawals, capital gains, business income, and Roth conversions can all push it up. A one-time event, such as selling a business or a large conversion, can raise a premium two years later even after your income drops. Treat that as a tax-planning question, and ask a tax professional.
Ways costs can come down
- Premium-free Part A: You or your spouse worked 10 years (40 quarters) in Medicare-covered employment.
- Delayed Part B: Group coverage through current employment can open a special enrollment period lasting 8 months after employment or coverage ends. Missing it adds a 10% penalty per full 12 months without Part B.
- Medicare Savings Programs: QMB, SLMB, and QI help with Part B costs.
- Extra Help: Reduces Part D costs.
Asking for a new IRMAA decision
If a life-changing event cut your income, file Form SSA-44. Recognized events include marriage, divorce, a spouse's death, retirement, reduced work, loss of pension income, and certain income-producing property losses. Expect to provide evidence plus a signed return or IRS transcript.
If you simply disagree with the decision, request reconsideration with Form SSA-561-U2, generally within 60 days of receipt.
Original Medicare, Medicare Advantage & Medigap: Comparing Cost Structures
Medicare Advantage enrollees must keep Part B and pay its premium, plus any IRMAA. A "$0 premium" plan means no additional plan premium. KFF found that 75% of individual MA-PD enrollees pay no additional premium in 2026, but that figure excludes Part B.
Some plans do help pay part of the Part B premium.
| Structure | Premium layers | Spending protection |
|---|---|---|
| Original Medicare | Part B, plus Part D if enrolled | No annual out-of-pocket limit |
| Original + Medigap | Part B + Medigap (+ Part D) | Policy helps with Part A/B cost-sharing |
| Medicare Advantage | Part B + any plan premium | Plan out-of-pocket maximum |
For 2027, the mandatory Medicare Advantage maximum is $9,850 in-network, though plans may set lower limits. Part D's standard deductible rises from $615 to $700, with an out-of-pocket threshold of $2,400.
Medigap prices vary by insurer, policy, location, and age rating. You still pay the Part B premium separately; Medigap doesn't replace what you owe for Part B.
Your six-month Medigap open enrollment starts the month you're 65 or older and enrolled in Part B. Afterward, underwriting may apply in many states.
Compare expected total annual costs and access to your doctors, hospitals, pharmacies, and medications. The lowest monthly premium isn't always the lowest bill.
How to Estimate Your Total 2027 Medicare Budget
Steps to calculate your total
- Start with the verified Part B premium and multiply by your covered months.
- Add the annual Part B deductible.
- Add any IRMAA for Part B and Part D.
- Add Part D, Medigap, or Medicare Advantage premiums.
- Add dental, vision, and other coverage costs.
- Check plan cost-sharing: deductibles, copays, coinsurance, networks, formulary, and maximum out-of-pocket.
Documents to review
- Social Security's IRMAA determination notice, which can arrive at any time
- The tax return it used
- Your plan's Annual Notice of Change, sent in September
- Medicare Summary Notices (not bills)
A hypothetical illustration
These figures use the projected 2027 premium and are not quotes. Assume a full year of Part B at $209.50, or $2,514, plus the $292 deductible.
- Standard premium, Original Medicare: $2,514 + $292 = $2,806, before Part D, Medigap, or coinsurance.
- IRMAA beneficiary: Using the 2026 first-tier Part B surcharge of $81.20 as a stand-in, add about $974 a year, for roughly $3,780.
- Medicare Advantage enrollee: The same $2,514 Part B premium, plus any plan premium (average $15/month in 2026, or $180 a year), plus plan cost-sharing.
If your IRMAA looks wrong
Contact Social Security at 1-800-772-1213. Depending on the situation, you may correct IRS data, file SSA-44, or request reconsideration. Amended returns need IRS acceptance or a transcript.
Getting help
A licensed agent at Muneris Benefits can help you compare Medicare Supplement, Medicare Advantage, and related coverage. Tax questions and official IRMAA determinations belong with Social Security, Medicare, and a qualified tax professional.
Confirm final figures through Medicare.gov, Social Security, 1-800-MEDICARE, or your State Health Insurance Assistance Program. When you are ready to lock in coverage, annual enrollment runs October 15 to December 7.
Conclusion
Your 2027 Part B budget is more than the standard premium. These costs all count toward your total:
- Deductible
- IRMAA
- Part D
- Supplemental coverage
- Plan cost-sharing
- Penalties
Your number depends on income, filing status, enrollment timing, coverage choice, health care use, prescriptions, and assistance eligibility.
Before the new year starts, verify official 2027 figures, read your Medicare and Social Security notices, and compare total annual costs.
Frequently Asked Questions
What will the Medicare Part B premium be in 2027?
The official figure isn't published yet. The Trustees project $209.50 a month, a provisional number. CMS typically announces final rates in the fall, as it did on November 14, 2025.
Do I have to pay a Medicare Part B premium when I turn 65?
Most people do. The amount and your enrollment decision can depend on income, employer coverage, and eligibility for assistance programs. Delaying without qualifying coverage can trigger a penalty.
Is it better to have Medicare A and B or Medicare Advantage?
Neither wins for everyone. Compare provider access, prescriptions, premiums, cost-sharing, prior authorization, travel needs, and out-of-pocket protection.
Which tax year is used to calculate 2027 IRMAA?
Generally tax year 2025, using the most recent return available to Social Security. Your individual notice controls.
Can I appeal or lower my 2027 IRMAA surcharge?
Yes, in some cases. You can correct errors, file Form SSA-44 after a qualifying life-changing event, or request reconsideration. Submit supporting documents to Social Security.
What is the Medicare Part B deductible for 2027?
The Trustees project $292, up from $283 in 2026. It's a projection until CMS publishes final figures, and it's separate from the monthly premium.
