The 2026 Social Security cost-of-living adjustment (COLA) put more dollars in millions of retirees’ checks — but here’s the catch: for many people, that raise is already being clawed back through higher Medicare Part B premiums, increased income taxes on benefits, and IRMAA surcharges triggered by a slightly larger income. Understanding exactly where your raise goes is the single most important money move you can make this year.

What is the 2026 Social Security COLA and why does it feel smaller than it looks?

Each year, Social Security adjusts benefits based on the Consumer Price Index for Urban Wage Earners (CPI-W). The 2026 COLA added a meaningful percentage bump to monthly checks, and that sounds like great news. The problem is that other costs move in lockstep — or faster. Medicare Part B premiums, which are deducted directly from your Social Security check before it ever hits your bank account, tend to rise alongside (or ahead of) inflation. If your Part B premium climbs by $10–$20 a month while your COLA adds $30, your real take-home increase shrinks fast. For millions of retirees, the net gain after Medicare deductions is far smaller than the headline number suggests.

How do Medicare IRMAA surcharges quietly eat your raise?

IRMAA stands for Income-Related Monthly Adjustment Amount — a surcharge added to your Medicare Part B and Part D premiums if your income exceeds certain thresholds. Here’s the sneaky part: Social Security uses your tax return from two years ago to determine your IRMAA tier. So your 2026 Medicare costs are based on your 2024 income. If you sold a property, took a large retirement account withdrawal, or had any unusual income in 2024, you may now be paying hundreds of dollars more per month in Medicare premiums — even if your 2026 income is much lower.

The 2026 IRMAA tiers kick in at roughly $106,000 for single filers and $212,000 for married couples filing jointly (based on modified adjusted gross income, or MAGI). The surcharges can add anywhere from about $70 to over $400 per month per person, depending on your income bracket. If you believe your income has dropped significantly since that two-year-ago return, you can appeal to Social Security using Form SSA-44 and request a review based on a life-changing event.

How much of your Social Security benefit is actually taxable?

This surprises many retirees: up to 85% of your Social Security benefit can be subject to federal income tax, depending on your “combined income” (also called provisional income). Combined income is your adjusted gross income, plus any non-taxable interest, plus half of your Social Security benefit.

  • If your combined income is below $25,000 (single) or $32,000 (married filing jointly), your benefits are not taxed.
  • Between $25,000–$34,000 single / $32,000–$44,000 joint, up to 50% of benefits may be taxed.
  • Above those thresholds, up to 85% of your benefits are taxable.

Because these thresholds have never been adjusted for inflation since 1983, more retirees fall into the taxable category every single year — even without a raise. The 2026 COLA nudges even more people over the line. A good tax strategy, such as managing Roth conversions or timing withdrawals carefully, can help keep your combined income below those thresholds.

When should you claim Social Security to maximise your benefit?

Claiming age is one of the biggest levers you have over your lifetime Social Security income. You can claim as early as 62, but your benefit will be permanently reduced — by as much as 30% compared to your full retirement age (FRA) amount. If you wait past your FRA (which is 67 for anyone born in 1960 or later), your benefit grows by 8% per year in delayed retirement credits, up to age 70. That means waiting from 67 to 70 can increase your monthly check by 24%.

The right answer depends on your health, your spouse’s situation, and whether you have other income to live on while you wait. Generally, if you’re in good health and expect to live into your mid-80s or beyond, waiting pays off significantly. A break-even analysis — calculating the age at which total lifetime benefits equal out — typically falls around age 80 to 82.

What are the 2025 and 2026 RMD rules you need to follow?

Required Minimum Distributions (RMDs) are the amounts the IRS requires you to withdraw from traditional IRAs, 401(k)s, and most other tax-deferred retirement accounts once you reach a certain age. Under the SECURE 2.0 Act, the RMD starting age increased to 73 in 2023 and will rise to 75 in 2033.

For 2025 and 2026, if you turned 73, you must take your first RMD by April 1 of the year following the year you turn 73. Important: if you delay your first RMD to April 1, you’ll owe two RMDs in that same tax year — which can spike your income, increase your Social Security taxes, and trigger IRMAA surcharges. Planning your withdrawal timing carefully can prevent a costly tax pile-up. Qualified Charitable Distributions (QCDs) — donating up to $105,000 directly from your IRA to a qualified charity — remain one of the best legal tools to satisfy your RMD while keeping that money out of your taxable income.

How can you protect your net Social Security income in 2026?

The good news: there are real, actionable steps you can take right now.

  1. Review your Medicare premium notice. Check whether you’ve been assigned an IRMAA surcharge and, if your income has dropped, file Form SSA-44 to appeal.
  2. Calculate your combined income. Add up your AGI, non-taxable interest, and half your Social Security to see where you land on the tax threshold chart.
  3. Time your RMDs strategically. Work with a financial advisor or tax professional to spread withdrawals across years and avoid bunching income.
  4. Consider Roth conversions. Converting some traditional IRA money to a Roth IRA in lower-income years reduces future RMDs and taxable income.
  5. Delay claiming if you can. Every month you wait past your FRA (up to 70) adds to your permanent monthly benefit — and that higher base also means higher future COLAs.

The 2026 COLA raise is real money. But keeping it requires knowing exactly where it goes and acting before the end of the tax year.

Frequently Asked Questions

When should I claim Social Security to maximise my benefit?

The longer you wait to claim — up to age 70 — the larger your monthly benefit. Delayed retirement credits add 8% per year past your full retirement age (67 for those born in 1960 or later), meaning waiting from 67 to 70 can boost your check by 24%. Your health, other income sources, and spousal situation should all factor into the decision.

How much of my Social Security benefit is taxable?

Up to 85% of your Social Security benefit can be federally taxable, depending on your combined income (AGI plus non-taxable interest plus half your Social Security). Single filers with combined income above $34,000 and married filers above $44,000 hit the 85% threshold. Managing withdrawals and Roth conversions can help keep you below these limits.

What are the RMD rules for 2025 and 2026?

Under the SECURE 2.0 Act, Required Minimum Distributions must begin at age 73 for anyone who reaches that age in 2023 or later. Your first RMD can be delayed until April 1 of the following year, but doing so means taking two RMDs in one year, which can increase your tax bill. The RMD starting age will rise to 75 in 2033.

How do I avoid Medicare IRMAA surcharges?

IRMAA surcharges are added to your Medicare premiums when your income from two years ago exceeds set thresholds (around $106,000 for singles in 2026). To avoid them, manage your taxable income through Roth conversions, QCDs, and careful withdrawal timing. If your income has dropped significantly, you can appeal the surcharge using Form SSA-44.

What is the Medicare Part B premium for 2025?

The standard Medicare Part B premium for 2025 was $185.00 per month, up from $174.70 in 2024. Higher-income beneficiaries pay more through IRMAA surcharges, which are applied in tiers based on income from two years prior. The 2026 premium may be adjusted; check Medicare.gov or your annual Medicare & You handbook for the latest figure.