You Got a 2.8% Raise. Medicare Took a Third of It Before You Saw a Dime.

Every year the same script plays out. Social Security announces a cost-of-living adjustment, the headline says seniors get a raise, and then the January deposit lands and something is off.

For 2026, here is the actual arithmetic.

Social Security's cost-of-living adjustment is 2.8%. For the average retired worker, that moves the monthly benefit from about $2,015 to $2,071 — roughly $56 more per month.

Then Medicare shows up. The standard Part B premium for 2026 is $202.90 a month, up from $185 in 2025. That is a $17.90 increase — a 9.7% jump, nearly double the average annual Part B increase of about 5% over the prior five years.

Do the subtraction. Of a $56 raise, about $18 never reaches your checking account. Roughly a third of the increase is gone before you buy a single gallon of gas.

Why this feels worse than it looks on paper

Because Part B is deducted straight out of your Social Security check, the increase is invisible. There is no bill to open, no decision to make, no moment where you get to say no. Your gross benefit went up 2.8%. Your net benefit went up considerably less.

And the COLA is a backward-looking number. It is based on the change in the CPI-W from the third quarter of 2024 through the third quarter of 2025 — an average of prices that already happened, across a basket built around urban wage earners. Medical care, which is where retirees actually spend a rising share of their money, does not get extra weight just because you are 72.

Meanwhile, the other 2026 numbers moved too:

• The Part A hospital deductible is $1,736 per benefit period, up $60 from $1,676.
• Days 61-90 of a hospital stay now cost $434 a day, up from $419.
• Skilled nursing coinsurance for days 21-100 is $217 a day, up from $209.50.

None of those numbers care what your COLA was.

The part that actually stings: IRMAA

That $202.90 is the standard premium. It is what you pay if your income is under the surcharge thresholds. Cross a line — by one dollar — and Medicare's income-related monthly adjustment amount kicks in and your premium climbs in brackets, for both Part B and Part D.

Here is the trap: IRMAA looks at your tax return from two years ago. So the Roth conversion you did, the house you sold, the big capital gain you harvested, the first required minimum distribution you took — those show up as a Medicare premium increase 24 months later, long after you have forgotten the transaction.

A retiree who takes a large RMD and does not model the downstream effect can trigger two separate consequences at once: more of their Social Security becomes taxable, and their Medicare premium jumps a bracket. Neither of those shows up on the withdrawal confirmation screen.

Four moves that protect the rest of your raise

1. Know your two IRMAA numbers, not one. You need the threshold for this year's premium and the modified adjusted gross income on the return Medicare is currently looking at. If you are $2,000 under a bracket line, a year-end mutual fund distribution can cost you a full bracket.

2. Do Roth conversions with the Medicare calendar in mind. Conversions in your early 60s — before Medicare is even in the picture — are structurally cheaper than the same conversion at 68, because they cannot bump a premium you are not paying yet. Converting after 63 puts the bill inside the IRMAA lookback window.

3. Appeal when life changes. If your income dropped because you retired, sold a business, lost a spouse, or got divorced, Medicare has a life-changing-event process. People who paid a surcharge on income they no longer have are usually people who never filed the form.

4. Sequence withdrawals on purpose. Which account you pull from — taxable, tax-deferred, or Roth — determines the AGI that determines the premium that determines your net check. Same lifestyle, same spending, different tax bill. That is the entire game.

The uncomfortable takeaway

A 2.8% COLA against a 9.7% Part B increase is not an accident and it is not a one-year fluke. Health care costs have been rising faster than the general price index for a long time, and the COLA is not built to keep up with them specifically. Which means the practical question is not how big is my raise. It is how much of my income do I actually control.

You cannot vote on the COLA. You cannot negotiate the premium. You can control your taxable income — and in retirement, that turns out to be most of the leverage you have left.

Figures cited are the Social Security Administration's 2026 COLA fact sheet and the Centers for Medicare & Medicaid Services 2026 Parts A and B premium release. This is general education, not personalized tax or investment advice.