According to the latest Social Security and Medicare Trustees Report, Medicare Part B monthly premiums are projected to rise by 3.5% in 2027, reaching $209.50. This represents a $6.60 monthly increase from the 2026 rate of $202.90. While any rate hike impacts retirees on fixed incomes, this projected increase is significantly lower than the nearly 10% spike experienced in 2026, offering some relief to millions of beneficiaries across the United States.
Medicare Part B, which covers doctor visits, outpatient care, and some home healthcare services, requires beneficiaries to pay both a monthly premium and an annual deductible. The latest projections provide early financial coordinates for retirees and financial planners as they prepare for the upcoming benefit year, though official figures from the Centers for Medicare & Medicaid Services (CMS) are not expected until late October or November 2026.
The Intersection of Part B Hikes and Social Security COLA
For most Medicare recipients, Part B premiums are automatically deducted from their monthly Social Security checks. Consequently, any premium increase directly offsets the annual Cost-of-Living Adjustment (COLA) designed to help retirees keep pace with inflation.
Based on June Consumer Price Index (CPI) data, the 2027 Social Security COLA is projected to rise by 3.8%. Applied to the average monthly Social Security benefit of $2,082.76 recorded in May 2026, this COLA would translate to a gross monthly increase of $79.14 (or approximately $949.68 annually). However, when factoring in the projected $6.60 Part B premium hike, the net monthly increase for the average beneficiary drops to $72.54. In this scenario, the Part B premium increase will consume roughly 8.3% of the total COLA raise, leaving retirees with slightly less disposable income than the headline COLA percentage suggests.
Rising Deductibles and Part A Costs
In addition to monthly premiums, Medicare Part B deductibles are also on the rise. The Part B deductible is projected to reach $292 in 2027, up $9.00 from $283 in 2026. This 3.2% increase is closely aligned with the percentage rise of the Part B premium itself.
The Trustees Report also outlines projected cost increases for Medicare Part A, which covers inpatient hospital stays, skilled nursing facilities, and some hospice care. While most Americans do not pay a premium for Part A, they are responsible for deductibles and co-insurance. For 2027, the Part A deductible for the first 60 days of hospitalization is projected to rise by 3% (or $52) to $1,788. Daily co-insurance for hospital days 61 through 90 is estimated at $447 (up $13), while lifetime reserve days (days 91 to 150) will rise to $894 per day. Co-insurance for skilled nursing facility stays is projected to increase to $223.50 per day for days 21 through 100.
Finalized Part D Changes and Subsidy Reductions
Unlike the estimated figures for Parts A and B, the 2027 parameters for Medicare Part D—which covers prescription drugs through private insurance plans—have already been finalized. The base beneficiary premium for Part D is set at $41.33 per month, representing a 6% increase (or $2.34) from $38.99 in 2026.
However, the most dramatic shift in Part D involves the annual deductible, which will jump 13.8% to $700 in 2027, up from $615 in 2026. This follows a more modest $25 increase in the prior year. This sharp escalation is tied directly to federal policy changes. In 2026, CMS scaled back its premium stabilization support under the Inflation Reduction Act (IRA) demonstration program. According to a CMS memorandum, reducing these federal subsidies is intended to help the Part D market “return to operating under regular market conditions,” shifting more upfront cost-sharing onto beneficiaries.
On a more positive note, the annual out-of-pocket prescription spending cap under Part D is scheduled to rise to $2,400 in 2027, up $300 from the $2,100 limit in 2026. Once a beneficiary reaches this threshold, they pay nothing out-of-pocket for covered prescription drugs for the remainder of the calendar year, providing significant protection for individuals with high-cost medication regimens.
Strategic Planning for Open Enrollment
With Medicare Open Enrollment running annually from October 15 to December 7, beneficiaries are encouraged to review their coverage options. During this window, enrollees can transition between original Medicare and Medicare Advantage, or select new Part D prescription drug plans to optimize their out-of-pocket exposure.
Higher-income beneficiaries must also account for the Income-Related Monthly Adjustment Amount (IRMAA), which adds a surcharge to both Part B and Part D premiums. Financial planners note that strategic income management, such as executing well-timed Roth IRA conversions, can lower modified adjusted gross income (MAGI) in retirement, potentially shielding seniors from crossing the IRMAA thresholds and incurring substantially higher monthly healthcare costs.