2026 Social Security COLA

How much of your 2.8% Social Security raise will you actually keep? Less than the headline, and for affluent retirees, possibly none of it. The 2026 cost-of-living adjustment is 2.8%, effective with December 2025 benefits and showing up in January 2026 checks. The raise is real. What happens to it next is the part worth understanding.

The COLA is the annual inflation bump Social Security applies to your benefit so it holds its buying power. A 2.8% raise on a $4,000 monthly benefit is about $112 a month. Then the deductions start.

What the raise gives and what takes it back

The first bite is Medicare. Part B premiums are usually pulled straight from your Social Security check, and the standard 2026 premium is $202.90 a month. When the premium rises alongside the COLA, the net raise in your deposit is smaller than the gross number suggests.

For higher-income retirees the bite is bigger. If your income lands you in an IRMAA bracket, the Medicare surcharge on top of that standard premium can swallow a large share of the COLA, sometimes the whole thing. The raise looks the same on paper. The deposit tells a different story.

The trap that never moves

Here’s the one that quietly gets worse every single year. The income thresholds that decide how much of your Social Security gets taxed are frozen in place. They have never been indexed for inflation.

For a single filer, provisional income over $25,000 starts making benefits taxable, and over $34,000 pushes up to 85% of the benefit into taxable territory. For a married couple it’s $32,000 and $44,000. Those numbers were set in 1984 and 1993. They have not moved once.

So every COLA nudges more of your benefit over lines that stand still. The raise meant to protect your buying power slowly drags you into having more of your benefit taxed. It’s a stealth tax increase, built right into the design, and almost nobody notices because the thresholds never make the news.

What to do about it

For most retirees the COLA is welcome and there’s nothing to do but take it. But if you’re affluent, plan around the leaks. Manage the income that drives your IRMAA bracket so the surcharge doesn’t eat the raise, and remember the Medicare lookback runs on income from two years back.

On the taxation trap, the lever is controlling provisional income in the years you can. Roth conversions done before you claim, or Roth withdrawals after, don’t count toward those frozen thresholds, which can keep more of your benefit out of the taxable zone. The planning happens in the low-income years, not the year the tax bill shows up.

The 2.8% is yours. Whether you keep it comes down to the income around it. For the deeper mechanics, see how the COLA flows through to your actual check.