"Medicare premiums are set to rise again for 2027. The latest Social Security and Medicare Trustees Report (page 207) estimates that Part B premiums will climb 3.5% in 2027, reaching $209.50 per month, up $6.60 from 2026. While another price hike is never good news for retirees, the increase is a relief compared to the almost 10% spike experienced in 2026.
Unlike Part B, Medicare Part D is sold through private insurance companies, either as a standalone drug plan alongside traditional Medicare or as part of a Medicare Advantage policy.
Because individual plan costs vary, the average premium enrollees pay is typically lower than the base beneficiary premium. According to the latest Trustees Report, the Part D base premium is projected to reach $41.33 per month in 2027.
Medicare Part B pays for doctor visits, outpatient care and some home healthcare. When enrolled, you pay both a deductible and a monthly premium. For 2027, the premium is currently projected to rise 3.5% to $209.50, up $6.60 from $202.90 in 2025.
The Part B deductible is projected to reach $292 in 2027, a $9.00 increase from $283.00 in the previous year. On a percentage basis, it's an increase of 3.2%, in line with the estimated increase of the Part B premium.
The projected Part B increase impact on Social Security benefits
The 2027 Social Security COLA is projected to rise 3.8%, after accounting for the June CPI. In terms of dollars, if implemented now, that would translate into an increase of $79.14 per month or $949.68 per year, when using the average Social Security check amount for May 2026 ($2,082.76) as the base amount.
The Social Security Administration (SSA) automatically deducts the Part B premium cost from the Social Security benefits of most Medicare recipients. For 2027, the average Social Security check would fall from $79.14 to $72.54, subtracting the projected Part B increase ($6.60) from the projected COLA raise (79.14). In that scenario, the Part B increase would consume approximately 8.3% of the monthly increase.
Understanding Medicare Part D premiums
Unlike Part B, there isn't a single "standard" Part D premium, as it varies by plan. The Centers for Medicare & Medicaid Services (CMS) establishes a standardized base premium amount used to calculate late enrollment penalties and to determine Part D IRMAA surcharges. For 2027, the base premium is $41.33.
Most final premium and deductible amounts won't be announced until late October or early November; however, most of the Part D amounts have been finalized.
Annual deductible: The standard Part D deductible will increase to $700 in 2027, up from $615 in 2026. That's a steeper increase than in 2026, when the deductible rose to $615 from $590 in 2025, a $25 increase.
Out-of-pocket spending cap: On a positive note for 2027, Medicare Part D's annual out-of-pocket prescription cap will rise to $2,400, up $300 from the $2,100 limit in 2026. Once beneficiaries reach this cap, they no longer pay out-of-pocket costs for covered prescription drugs for the rest of the year.
Premium protections and stabilization: To shield enrollees from steep rate hikes, the premium stabilization provision of the Inflation Reduction Act (IRA) caps annual base beneficiary premium (BBP) growth at 6% yearly through 2029, while limiting how much extra cost plan sponsors can pass along.
While an IRA demonstration program previously stabilized average monthly premiums, CMS scaled back that support in 2026, stating in a memo that reducing federal subsidies is meant to help the Part D program "return to operating under regular market conditions."
Notes from Newsweek