Medicare’s trustees project the standard Part B premium will rise to $209.50 a month in 2027, a $6.60 increase from the confirmed 2026 rate of $202.90, while the Centers for Medicare & Medicaid Services still has not published the official 2027 premium that will be deducted from most Social Security checks starting January.
Projection versus announcement
The trustees’ June 2026 report is the authoritative pre-announcement estimate federal actuaries publish each spring. CMS historically releases final Part B premiums and deductibles in November; the 2026 figures arrived on November 14, 2025. Until CMS posts the 2027 fact sheet, treat $209.50 as planning math, not a bill you can pay yet. Some private forecasters expect a higher final number if late-year spending trends diverge from trustees assumptions.
Part B covers physician services, outpatient hospital care, and drugs administered in clinics. The annual Part B deductible for 2026 is $283; trustees project $292 for 2027. High-income beneficiaries pay more through income-related monthly adjustment amounts tied to tax returns from two years earlier.
October rebate checks in the mix
The White House promoted one-time $90 payments this month for roughly 20.8 million original Medicare beneficiaries to offset Part B costs ahead of the midterm elections. That rebate is separate from the trustees’ 2027 premium projection and separate from the annual COLA Social Security will calculate after October 14 inflation data.
Household cash flow this month can look confusing: a rebate deposit, routine Part B withholding at the 2026 rate, and marketing mail for Medicare Advantage plans ahead of open enrollment starting October 15. Michael Patel’s desk separates the lines: the rebate is a one-time political delivery; the premium projection is the recurring charge CMS will finalize for next year.
What to do before open enrollment
Original Medicare enrollees comparing Medigap or Part D plans should model 2027 costs using the trustees figure plus their drug utilization, then update when CMS publishes official numbers. Medicare Advantage members should read the annual notice of change from their plan—premium changes, copays, and drug tiers can swamp a few dollars on Part B itself.
If you received the $90 rebate, do not assume it repeats in 2027; budget for the projected $209.50 standard premium unless CMS surprises with a lower final figure. SHIP counselors can run side-by-side comparisons without selling a product.
Hospital insurance is a different line
Part A inpatient deductibles and coinsurance follow their own announcement cycle. Most beneficiaries pay no Part A premium if they have sufficient payroll tax quarters. Trustees also project longer-run premium growth toward the $270 range by 2031; that horizon matters for policy debates more than for this fall’s shopping list.
Calendar for the next eight weeks
October 15 opens Medicare open enrollment through December 7. November brings the CMS premium fact sheet. January 1 applies new coverage choices and, once announced, the 2027 Part B rate. Track each date independently: scams prey on beneficiaries who conflate rebate checks, COLA headlines, and plan marketing into one urgent phone call.
Pharmacies can bill differently for branded drugs if manufacturer assistance programs shift; ask whether your current fill price assumes 2026 cost-sharing or already advertises 2027 plan tiers before you stock a 90-day supply in late December.