The 2026 Social Security cost-of-living adjustment (COLA) put more money on paper for millions of retirees — but after Medicare Part B premiums are deducted directly from your benefit, many recipients are netting far less than the headline number suggests. For the average beneficiary, the real take-home increase after Medicare’s premium bite can shrink to just a few dollars a month. Understanding what you actually keep — and what levers you can pull to protect more of it — is the most important money move you can make this year.

What is the 2026 COLA and how is it calculated?

COLA stands for cost-of-living adjustment. Every year, the Social Security Administration (SSA) measures inflation using a specific government price index called the CPI-W (Consumer Price Index for Urban Wage Earners and Clerical Workers). If prices rose, your benefit rises by roughly the same percentage. For 2026, retirees received a COLA increase designed to help keep pace with inflation — but here’s the catch that surprises many people: your Medicare Part B premium is deducted from your Social Security check before it ever hits your bank account. So when Medicare premiums go up in the same year as your COLA, the two increases partially cancel each other out.

What is the Medicare Part B premium for 2026?

Medicare Part B covers doctor visits and outpatient services. The standard monthly premium for 2026 is $185.00 — up from $174.70 in 2025. That’s a jump of about $10.30 per month, or roughly $124 more per year, being deducted straight from your Social Security payment. For a beneficiary receiving an average monthly benefit, that premium increase alone can erase a meaningful slice of the COLA raise before you even check your balance. The math is straightforward but sobering: COLA dollars in minus premium dollars out equals your real raise.

How do I avoid Medicare IRMAA surcharges that shrink my check even further?

IRMAA stands for Income-Related Monthly Adjustment Amount — Washington’s way of saying that higher earners pay more for Medicare. If your income reported on your tax return from two years ago exceeded certain thresholds, you’re charged an IRMAA surcharge on top of the standard Part B premium. In 2026, those surcharges can add anywhere from roughly $74 to over $443 per month to your Medicare costs. The critical thing to understand is that IRMAA looks back two years — so your 2026 surcharge is based on your 2024 income. If you had a one-time income spike in 2024 (a Roth conversion, a home sale, a required minimum distribution), you may be paying a surcharge you don’t deserve long-term. The good news: you can appeal an IRMAA determination using SSA Form SSA-44 if you’ve had a qualifying life event, such as retirement or reduced income. Planning your income carefully — especially around Roth conversions and RMDs — is the single most powerful way to stay below IRMAA thresholds in future years.

What are the RMD rules for 2025 and 2026 that could affect my Medicare costs?

Required Minimum Distributions, or RMDs, are the amounts the IRS forces you to withdraw from traditional IRAs and 401(k)s each year once you reach a certain age. Under current law, RMDs begin at age 73. Here’s the connection to Medicare that catches many retirees off guard: a large RMD withdrawal can push your reported income above an IRMAA threshold, triggering a Medicare surcharge two years later. For 2026 planning, that means the RMDs you take this year could affect your 2028 Medicare premiums. Smart strategies include spreading Roth conversions across multiple lower-income years before RMDs kick in, and coordinating withdrawals so no single year creates a large income spike. Working with a tax professional to map out a multi-year withdrawal strategy can save you thousands in Medicare surcharges.

When should I claim Social Security to maximise my benefit?

This is one of the most consequential decisions you’ll make in retirement, and the COLA math actually strengthens the case for waiting. You can claim Social Security as early as age 62, but your benefit is permanently reduced — by up to 30% compared to your full retirement age amount. If you wait until age 70, your benefit grows by 8% per year beyond full retirement age. Here’s the underappreciated piece: COLA increases are applied as a percentage of your benefit. That means a larger base benefit earns you a larger COLA dollar amount every single year for the rest of your life. A retiree with a $2,000 monthly benefit at 70 gets more COLA dollars from a 3% adjustment than someone receiving $1,400 at 62. If you’re in good health and can bridge the income gap — through part-time work, savings, or a spouse’s income — delaying to 70 is often the highest-return, lowest-risk financial move available to you.

How much of my Social Security benefit is actually taxable?

Many retirees are genuinely surprised to learn that Social Security can be taxable — up to 85% of your benefit can be included in your taxable income depending on your overall income. The IRS uses a figure called “combined income” (your adjusted gross income plus any tax-exempt interest plus half of your Social Security benefit). If that combined number exceeds $25,000 for single filers or $32,000 for married couples filing jointly, a portion of your benefit becomes taxable. At higher income levels, up to 85 cents of every Social Security dollar is taxed. This is another reason IRMAA planning matters: large Roth conversions or RMDs don’t just push up Medicare costs — they can push more of your Social Security into a taxable bracket simultaneously. Keeping combined income below key thresholds through careful withdrawal sequencing is a two-for-one win.

How can I protect more of my COLA raise going forward?

There’s no single magic fix, but a combination of strategies adds up meaningfully over time. First, understand your IRMAA tier and whether you’re close to a threshold — sometimes modest income adjustments keep you in a lower bracket. Second, consider the timing and size of Roth conversions: paying taxes now on IRA money, while you’re in a lower bracket, can reduce future RMDs and future IRMAA exposure. Third, if you haven’t yet claimed Social Security, model the lifetime value of waiting — even one or two additional years can result in a substantially larger base benefit. Finally, review your Medicare plan annually during Open Enrollment (October 15 – December 7). Switching to a more cost-effective Medicare Advantage or supplement plan can offset premium increases your COLA doesn’t fully cover.

The headline COLA number is never the real number. Knowing what you actually keep — and planning around Medicare costs, taxes, and RMDs together — is how you make the most of every dollar you’ve earned.

Frequently Asked Questions

When should I claim Social Security to maximise my benefit?

Waiting until age 70 to claim Social Security gives you the largest possible monthly benefit — up to 32% more than claiming at full retirement age and roughly 77% more than claiming at 62. Because COLA increases are applied as a percentage of your benefit, a higher base benefit also earns you more dollars from every future cost-of-living adjustment for the rest of your life.

How much of my Social Security benefit is taxable?

Depending on your total income, between 0% and 85% of your Social Security benefit can be subject to federal income tax. The IRS calculates your ‘combined income’ — adjusted gross income plus tax-exempt interest plus half your Social Security — and if it exceeds $25,000 (single) or $32,000 (married filing jointly), a portion becomes taxable. Strategic withdrawal planning can help keep you below these thresholds.

What are the RMD rules for 2025 and 2026?

Required Minimum Distributions must begin at age 73 under current law, applying to traditional IRAs, 401(k)s, and most other tax-deferred retirement accounts. The amount you must withdraw each year is calculated by dividing your prior year-end account balance by an IRS life expectancy factor. Large RMDs can increase your income and trigger IRMAA Medicare surcharges two years later, so coordinating RMD timing with other income sources is essential.

How do I avoid Medicare IRMAA surcharges?

IRMAA surcharges are based on your income from two years prior, so proactive planning is key — keep modified adjusted gross income below IRMAA thresholds by spreading Roth conversions across multiple years, timing asset sales carefully, and coordinating RMDs. If your income dropped due to a qualifying life event like retirement, you can appeal your IRMAA determination with the SSA using Form SSA-44 to have it recalculated using more recent income.

What is the Medicare Part B premium for 2026?

The standard Medicare Part B premium for 2026 is $185.00 per month, up from $174.70 in 2025 — an increase of about $10.30 per month. Higher-income beneficiaries pay additional IRMAA surcharges on top of this amount. Because Part B premiums are deducted directly from Social Security checks, premium increases directly reduce the real-world value of any COLA raise you receive.