Every January, the Social Security Administration announces a cost-of-living adjustment. Every January, retirees do the same calculation: what does my check actually look like after Medicare takes its cut?
For 2026, the math is not kind.
The Numbers
Social Security benefits received a 2.8% COLA for 2026. For the average retired worker, that translates to roughly $56 per month in additional income.
The standard Medicare Part B premium rose from $185.00 in 2025 to $202.90 in 2026, an increase of $17.90 per month or 9.7%. The Part B annual deductible increased from $257 to $283, a $26 jump.
Since Part B premiums are automatically deducted from Social Security checks for most beneficiaries, the net increase in take-home Social Security income is approximately $38 per month for the average retiree.
That is $456 per year. Enough to notice. Not enough to change much.
| Item | 2025 | 2026 | Change |
|---|---|---|---|
| Average monthly SS benefit | ~$1,976 | ~$2,032 | +$56 (+2.8%) |
| Medicare Part B premium | $185.00 | $202.90 | +$17.90 (+9.7%) |
| Net monthly increase | -- | -- | ~$38 |
| Part B annual deductible | $257 | $283 | +$26 |
The pattern is familiar. Medicare premium increases have outpaced Social Security COLAs in most of the last ten years. The COLA is designed to keep pace with inflation broadly. Medicare premiums are driven by healthcare cost growth, which consistently runs ahead of general inflation. The result is a slow, structural squeeze on retirement income.
Why This Keeps Happening
The Social Security COLA is tied to the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W). This index measures general inflation across a broad basket of goods and services.
Medicare Part B premiums are set by CMS based on projected spending for physician services, outpatient care, and Part B drug costs. Healthcare spending growth has consistently outrun CPI-W for decades.
The mismatch is baked in. A 2.8% general COLA applied to a benefit check that must absorb a 9.7% increase in one of its largest line items will always feel like a pay cut. And for many retirees, it functionally is one.
This is not a one-year anomaly. Between 2000 and 2026, cumulative Social Security COLAs have increased benefits by roughly 80%. Over the same period, the Medicare Part B premium has increased by over 250%. The gap compounds.
The IRMAA Problem
For higher-income retirees, the squeeze is worse. The Income-Related Monthly Adjustment Amount adds a surcharge to both Part B and Part D premiums for beneficiaries above certain income thresholds.
For 2026, the IRMAA thresholds (based on 2024 Modified Adjusted Gross Income) are:
| Filing Status | Tier 1 Threshold | Part B Premium at Tier 1 |
|---|---|---|
| Single | $109,000 | $284.10 |
| Married Filing Jointly | $218,000 | $284.10 |
At the highest tier ($500,000 single / $750,000 MFJ), the Part B premium reaches $689.90 per month. That is $8,279 per year for Part B alone.
IRMAA is a cliff-based system: exceeding a threshold by even $1 triggers the full surcharge for that tier. And the income it uses is from two years prior, meaning actions taken in 2024 are affecting 2026 premiums right now.
This creates a trap for retirees who take a large capital gain, do a Roth conversion, or sell a property without planning for the IRMAA impact two years later. A one-time income event in 2024 can increase Medicare premiums throughout 2026 by thousands of dollars.
What You Can Actually Do About It
The COLA-Medicare squeeze is structural. You cannot negotiate your way out of it. But there are several planning strategies that reduce its impact or offset it entirely.
Manage your MAGI to stay below IRMAA thresholds. If your income is near an IRMAA tier boundary, even small adjustments matter. Timing capital gains realizations, managing Roth conversion amounts, and coordinating retirement account withdrawals can keep you in a lower tier. The difference between Tier 0 and Tier 1 is roughly $81 per month per person for Part B alone, or nearly $1,000 per year.
Front-load Roth conversions before Medicare enrollment. The most efficient window for Roth conversions is often ages 63 to 64, before Medicare eligibility at 65. During these years, conversions increase taxable income but do not trigger IRMAA (because you are not yet on Medicare). Once on Medicare, every conversion dollar flows into MAGI and potentially pushes you into a higher IRMAA tier two years later.
For those already on Medicare, Roth conversions can still be valuable but require careful IRMAA-aware planning. The goal is to convert up to just below the next IRMAA threshold each year rather than doing a single large conversion that triggers a cliff surcharge.
Fill the lower tax brackets in the gap years. The years between retirement and Required Minimum Distributions (age 73 under current law) are often the lowest-income years of a retiree's life. This creates a window to take strategic income: Roth conversions up to the 22% bracket ceiling ($50,600 taxable income for single filers in 2026), capital gain harvesting while in the 0% long-term capital gains bracket, and partial IRA distributions that fill lower brackets before RMDs force larger ones.
This reduces future RMDs, lowers future IRMAA exposure, and creates more tax-free income in later years when Medicare costs are higher.
Use the new $6,000 senior bonus deduction. The One Big Beautiful Bill Act created a new additional deduction of $6,000 for taxpayers age 65 and older ($12,000 for married couples when both qualify), effective for the 2025 tax year. This is on top of the existing additional standard deduction for seniors ($2,050 single / $1,650 each for married filers in 2026).
The senior bonus deduction phases out between $75,000 and $175,000 MAGI for single filers, and $150,000 to $250,000 for married filing jointly. For retirees in the phase-in range, this can reduce federal income tax by $1,320 to $2,640 per year (at the 22% bracket), which more than offsets the Medicare premium increase.
Coordinate QCD giving if you are 70.5 or older. Qualified Charitable Distributions allow you to direct up to $111,000 per spouse (2026 limit) from an IRA directly to a qualified charity. The distribution satisfies your RMD but does not count as taxable income. This lowers MAGI, which can reduce IRMAA exposure and reduce the taxable portion of Social Security benefits simultaneously.
Build a healthcare cost trajectory into your retirement income plan. Too many retirement plans assume healthcare costs grow at the same rate as general inflation. They do not. A plan that models healthcare cost growth at 6-7% annually, roughly double general inflation, will produce a more realistic projection of spending needs at ages 75, 80, and 85. This is where the COLA-Medicare squeeze compounds. Planning for it early is cheaper than reacting to it later.
The Bigger Point
A 2.8% raise that becomes $38 a month is not a catastrophe for any individual year. The problem is the compounding. When healthcare costs consistently outpace the inflation adjustment on your largest guaranteed income source, the purchasing power of that income declines slowly but relentlessly.
Social Security was designed to be a floor, not a ceiling. The families who feel the COLA squeeze least are the ones who built their retirement income plan to treat Social Security as one component of a diversified income strategy: guaranteed income from Social Security and pensions, tax-deferred withdrawals from IRAs and 401(k)s managed for tax bracket efficiency, tax-free income from Roth accounts and municipal bonds, and a flexible spending buffer that absorbs cost increases without forcing lifestyle changes.
If your retirement income plan assumes the Social Security check covers the bills and everything else is gravy, the math in this article should be a prompt to revisit that assumption. The squeeze is not getting better. It is structural. And planning around it is entirely possible.
