Social Security COLA Updates: What Medicare Beneficiaries Need to Know
Every fall, the Social Security Administration announces the next year’s cost-of-living adjustment (COLA). For Medicare beneficiaries, the COLA affects far more than just your Social Security check. It ripples through Medicare premiums, deductibles, income thresholds, and the size of your take-home benefit.
What Is the Social Security COLA?
The COLA is an automatic annual adjustment to Social Security benefits designed to keep pace with inflation. It is based on the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W). The Social Security Administration compares the average CPI-W for the third quarter (July, August, September) to the same period the prior year. If prices rose, benefits rise by the same percentage. Benefits never decrease.
The COLA is announced each October and takes effect in January of the following year.
How the COLA Affects Medicare Premiums
When your Social Security check goes up due to a COLA, your Medicare Part B Premium may also rise, reducing the net increase in your benefit. Most beneficiaries have their Part B premium deducted directly from their Social Security benefit.
Under the hold harmless provision, your Part B premium increase cannot exceed the dollar amount of your COLA increase. This ensures your net Social Security payment does not decrease from year to year due to rising Medicare premiums.
The hold harmless provision does not apply if:
- You are not yet collecting Social Security (paying your Part B premium directly)
- You are subject to IRMAA (income-related surcharges)
- You are newly enrolling in Part B
2026 Medicare Cost Figures
- Part B premium: $202.90/month (up from $185.00 in 2025)
- Part B Deductible: $283 (up from $257 in 2025)
- Part A inpatient Deductible: $1,736 per Benefit period (up from $1,676 in 2025)
- Part D national base premium: $38.99/month (used in Penalty calculations)
- Part D out-of-pocket cap: $2,100 (up from $2,000 in 2025)
IRMAA and the COLA
IRMAA (Income-Related Monthly Adjustment Amount) is the surcharge applied to Part B and Part D premiums for higher-income beneficiaries. IRMAA is based on your income from two years prior, your 2026 IRMAA is calculated from your 2024 tax return.
The income thresholds for IRMAA are adjusted each year for inflation, usually in line with the COLA. In 2026, the threshold that triggers IRMAA is approximately $106,000 for individuals and $212,000 for married couples filing jointly.
If your income dropped significantly due to retirement, a death in the family, or another qualifying life event, you can request that Medicare use a more recent year’s income. File Form SSA-44 with Social Security.
The Part D Penalty and the COLA
The Part D late enrollment penalty is calculated as a percentage of the national base beneficiary premium. Because that base premium adjusts each year (rising to $38.99 in 2026, up from $36.78 in 2025), the dollar amount of your penalty can change year to year even though the percentage stays the same.
When Are These Announcements Made?
- October: Social Security COLA announcement at SSA.gov
- November: Medicare premium and cost announcement at Medicare.gov (CMS)
Together, these determine your net Social Security benefit, your Medicare costs, and whether IRMAA applies to you for the coming year.
The Bottom Line
The Social Security COLA is part of a larger annual recalibration of Medicare costs, income thresholds, and premium amounts. In years of high inflation, large COLAs often come paired with large Medicare premium increases, meaning your net gain may be smaller than the headline number suggests. Staying informed about both announcements each fall helps you budget accurately and avoid surprises each January.
Questions about how Medicare costs fit into your retirement budget? A REMEDIGAP advisor can help you find the right coverage at the right price.
💡 Your next step: As your Medicare premiums adjust with COLA changes, a Medicare Supplement plan can protect you from unpredictable out-of-pocket exposure year over year.
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Written by Michael Quinn
Licensed Broker, REMEDIGAP Founder
Fact Checked by Joann Quinn
Chief Compliance Officer
As a licensed insurance broker, REMEDIGAP upholds the principles of integrity in our editorial standards and ensures transparency in how we receive compensation from our insurance partners.