Medicare Part B 2027: The 09.50 Projection (and the 2025 Tax Return That Decides Your IRMAA)
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The premium most seniors will pay in 2027 was already sketched out by government actuaries — and the bracket that decides YOUR surcharge comes from a tax return you filed seven months ago.
Fuente: 2026 Medicare Trustees Report; anuncio oficial de CMS esperado oct-nov 2026.
The 2026 Medicare Trustees Report projects the standard Part B premium at $209.50/month for 2027, up $6.60 from $202.90 in 2026 — a much smaller jump than 2026's near-10% hike. CMS confirms the official figure around November 2026, along with IRMAA surcharge brackets based on your 2025 tax return's modified adjusted gross income.
Part B covers doctor visits, outpatient care and home health — and its premium is deducted straight from Social Security checks for most enrollees. That makes the annual announcement one of the biggest budget events of the year for retirees, especially those trying to preserve every dollar of their COLA increase.
The Projection, and Why It Could Move
| Year | Standard Part B premium | Change |
|---|---|---|
| 2025 | $185.00 | — |
| 2026 (in effect) | $202.90 | +9.7% |
| 2027 (projected) | $209.50 | +3.3% |
Independent projections run higher — some analysts model around $218.60 depending on inflation assumptions — but the Trustees' number is the official baseline CMS works from. Either way, the 2027 increase is expected to be far gentler than 2026's spike.
Your 2025 Tax Return Decides Your Surcharge
If your modified adjusted gross income exceeds the thresholds, you pay IRMAA — income-related surcharges stacked on top of the standard premium. For 2027 premiums, the SSA looks at MAGI from your 2025 return. Projected single-filer tiers start near $111,000, with steps around $140K, $175K, $210K and $500K; married-filing-jointly thresholds double, except the top tier at about $750,000. At the highest tier, Part B alone can exceed $600/month.
The Form That Can Cut Your Bill
A major life event since 2025 — retirement, divorce, widowhood, a work reduction — can shrink your IRMAA even if your old return says otherwise. File Form SSA-44 with Social Security to request reconsideration based on your new, lower income. Miss it and you'll overpay all year; it's one of the most-missed money moves in retiree finance.
What It Means for You
Circle October 15 – December 7 on your calendar: Medicare Open Enrollment is when you can switch between Original Medicare and Advantage plans or change drug coverage — worth reviewing since the Part D out-of-pocket cap rises to $2,400 in 2027 (from $2,100), a protection worth having in the right plan. And if your Part B premium comes out of your Social Security check, the "hold harmless" rule prevents your check from shrinking because of the premium increase — but it doesn't protect first-time enrollees, IRMAA payers, or people billed directly.
