By Qamar S, 15 years in US medical billing · Last reviewed October 11, 2026
The official 2027 Medicare Part B premium hasn’t been announced yet. The 2026 Medicare Trustees Report projects it at about $209.50 a month, up roughly $6.60 from the 2026 premium of $202.90. CMS usually announces the real number in November.
We’ll update this page the day CMS announces the 2027 premium, deductible and IRMAA brackets. Until then, treat every 2027 number you see online as a projection.
2026 vs 2027 at a glance
| 2026 (final) | 2027 | |
|---|---|---|
| Standard Part B premium | $202.90 a month | About $209.50 projected |
| Part B deductible | $283 a year | Not announced |
| IRMAA starts above | $109,000 single, $218,000 joint | Not announced |
| Highest IRMAA premium | $689.90 a month | Not announced |
| Announcement | November 2025 | Expected November 2026 |
How the premium affects your Social Security check
If you get Social Security, your Part B premium is taken out of your monthly payment. The 2027 cost-of-living adjustment (COLA) and the new Part B premium both take effect in January, so the change in your deposit is your COLA increase minus any Part B increase.
The hold harmless rule protects most people: if the Part B increase would make your Social Security check go down, your premium increase is limited to the amount of your COLA. It doesn’t apply if you pay IRMAA, are new to Medicare, or don’t have premiums deducted from Social Security.
IRMAA: will you pay more?
Higher earners pay an income-related monthly adjustment amount (IRMAA) on top of the standard premium. For 2027, Medicare will use the income on your 2025 tax return. See IRMAA brackets for 2027 for the 2026 tiers and how to appeal with Form SSA-44 if your income dropped because of retirement or another life-changing event.
What else to watch for 2027
- Part D: the yearly out-of-pocket cap rises to $2,400 and plans can charge a deductible up to $700. Estimate your costs with our Part D cost estimator.
- Medicare Advantage: some plans are leaving counties. See Medicare Advantage plans leaving in 2027.
- Open Enrollment: runs October 15 to December 7. See our plan review checklist.
From 15 years in billing: if you pay Part B premiums directly (not through Social Security), set a reminder to check your first bill in 2027. I’ve seen premiums go unpaid for months simply because people kept paying the old amount, and Medicare can end coverage for unpaid premiums.
Frequently asked questions
What is the Medicare Part B premium for 2027?
CMS hasn’t announced it yet. The 2026 Medicare Trustees Report projects about $209.50 a month. The 2026 premium is $202.90.
When will the 2027 Part B premium be announced?
CMS usually announces Part B premiums, deductibles and IRMAA brackets in the fall, most often in November.
Will my Social Security check go down because of Part B?
For most people, no. The hold harmless rule limits the Part B increase to the size of your COLA, so your net check doesn’t drop. It doesn’t apply to people who pay IRMAA or are new to Medicare.
Which year’s income is used for 2027 IRMAA?
Your 2025 tax return, under Medicare’s two-year look-back.
Sources: CMS: 2026 Medicare Parts A & B premiums and deductibles · CMS: 2026 Medicare Trustees Report · SSA: Medicare premiums and IRMAA
This guide is educational and is not legal, financial or insurance advice. MedBillGuide is not connected to Medicare, CMS or any government agency, and we do not sell insurance. See our Disclaimer.