A Smaller Check Than Expected
Retirees celebrating Social Security's 2.8% cost-of-living adjustment (COLA) for 2026 may be disappointed when they see their actual benefit increase. The reason: Medicare Part B premiums rose nearly 9.7%—more than three times faster than the COLA—erasing a significant portion of the raise before it reaches retirees' bank accounts.
The Social Security Administration announced the average retirement benefit will increase by about $56 per month in 2026, from $2,015 to $2,071. However, the standard Medicare Part B premium jumped $17.90 per month, from $185 to $202.90. For most retirees who have Medicare premiums automatically deducted from their Social Security checks, this means roughly one-third of their COLA increase disappears immediately.
The Growing Gap Between COLA and Healthcare Costs
This marks the third consecutive year that Medicare Part B premiums have risen faster than Social Security's COLA:
- 2024: Medicare up 6%, COLA 3.2%
- 2025: Medicare up 5.8%, COLA 2.5%
- 2026: Medicare up 9.7%, COLA 2.8%
The pattern reveals a structural mismatch in how these programs work. Social Security COLA tracks past inflation using the Consumer Price Index, while Medicare premiums anticipate future healthcare costs. This gap hits lower-income retirees hardest, as they lose a larger share of their COLA to Medicare premiums.
What Your Net Increase Actually Looks Like
For a retiree receiving the average benefit, the math works out roughly like this:
- Gross COLA increase: $56/month
- Medicare Part B increase: $17.90/month
- Net increase before other costs: $38.10/month
But that's not the whole picture. When factoring in Medicare Part D prescription drug premium increases (typically $6-$12 per month), increased drug costs, and rising service costs, many retirees will net just $20-$30 per month in additional usable income. For those on tight budgets, the raise simply doesn't keep pace with actual expenses.
The Hold Harmless Protection
There is one safeguard: the "hold harmless" provision prevents Medicare premium increases from reducing a Social Security recipient's monthly check below the previous year's amount. This protects retirees from owing money out of pocket if Medicare premiums rise faster than their COLA would allow.
However, hold harmless doesn't prevent the erosion of purchasing power—it only ensures your check doesn't go down in absolute dollar terms.
Higher Earners Face Larger Premiums
Retirees with modified adjusted gross income above $109,000 (individual) or $218,000 (married filing jointly) pay income-related monthly adjustment amounts (IRMAA) on top of the standard premium. In 2026, these surcharges can push monthly Part B costs as high as $689.90 for the highest earners.
The IRMAA brackets for 2026:
| Individual Income | Monthly Premium |
|---|---|
| Up to $109,000 | $202.90 |
| $109,001-$137,000 | $284.10 |
| $137,001-$171,000 | $405.80 |
| $171,001-$205,000 | $527.50 |
| $205,001-$499,999 | $649.20 |
| $500,000+ | $689.90 |
Practical Steps for Retirees
Review your budget expectations. Don't assume your full COLA increase will be available for spending. Factor in Medicare premium increases when planning.
Check your IRMAA status. If you're near an income threshold, strategies like qualified charitable distributions or Roth conversions in lower-income years might help manage future premiums.
Consider supplemental coverage carefully. Medigap and Medicare Advantage premiums also tend to increase annually. Review your options during open enrollment.
Build healthcare inflation into long-term planning. When projecting retirement expenses, assume healthcare costs will rise faster than general inflation.
Maximize tax-advantaged accounts. Building Roth assets can help manage taxable income in retirement, potentially keeping you in lower IRMAA brackets.
The gap between Social Security COLA and healthcare cost increases is a reality retirees must plan around. Understanding how these programs interact helps set realistic expectations and informs better financial decisions.
Sources: Social Security Administration, Centers for Medicare & Medicaid Services, AARP, CBS News