Consider Frank, a hypothetical retired police officer who left a mid-sized city department at 55 with a pension. At 66, he added Social Security and occasional withdrawals from his governmental 457(b). He thought the retirement math was settled. Then Social Security sent an IRMAA notice saying his Medicare premiums were going up. Nothing had gone wrong with his investments. His pension, benefits, and withdrawals had simply pushed the income on an earlier tax return across a Medicare line he had never needed to watch.
How the Numbers Cross the Line
Frank has $890,000 invested: $610,000 in his 457(b) and $280,000 in a taxable brokerage account. The account balance itself does not trigger IRMAA, but taxable withdrawals, pension income, taxable Social Security, realized gains, and tax-exempt interest can all affect the calculation. IRMAA is the income-related amount Medicare adds to Part B and Part D costs. For 2026, a single filer pays the standard $202.90 Part B premium with MAGI of $109,000 or less. From $109,000.01 through $137,000, Part B rises by $81.20 a month and Part D adds $14.50. That is $95.70 monthly, or $1,148.40 for the year, on top of the regular Part B premium and Frank’s own Part D plan premium.
The Two-Year Lookback Is What Trips People Up
Frank’s 2026 surcharge is generally based on his 2024 federal tax return, not the money arriving in 2026. The tax year matters, not the date the return was filed. Medicare’s version of MAGI starts with adjusted gross income and adds tax-exempt interest. A 457(b) withdrawal, a Roth conversion, or gains realized from selling investments can raise it. Even municipal-bond interest that is exempt from federal income tax normally counts. Income Frank recognizes during 2026 may affect his 2028 premiums under the thresholds in effect then. That delay makes IRMAA easy to miss, but it also means a one-time income spike usually produces a surcharge for one premium year rather than permanently.
His 457(b) Is Useful, but Not Invisible
A governmental 457(b) offers retired public workers unusual flexibility. After separation from service, its taxable distributions generally avoid the 10% additional tax that often applies to early withdrawals from other retirement accounts. An exception can apply to money rolled into the plan from another type of account. The withdrawal is still taxable income, however, and at 66 that is the part Frank must watch. Taking larger distributions in selected years may reduce the number of IRMAA years, but it can also push him into a higher surcharge tier or tax bracket. Bunching can help in a carefully modeled plan, but it does not automatically produce five-figure savings.
HELPS Is More Flexible Than It Used to Be
The HELPS provision may give Frank a smaller, cleaner adjustment. An eligible retired public safety officer can exclude up to $3,000 of distributions from the former employer’s eligible retirement plan when that money pays qualified health or long-term-care insurance premiums. Since 2023, the plan no longer has to send the money directly to the insurer. Frank can receive the distribution and pay the premium himself, provided he meets the rules and keeps records. The limit is $3,000 per eligible officer, not $6,000 for every married couple. Reducing taxable income by $3,000 may also reduce Medicare MAGI, which could eliminate IRMAA when someone is only slightly over the line.
QCDs Come Later, and the RMD Age Matters
Once Frank reaches age 70 1/2, a qualified charitable distribution may help if he already gives to charity. In 2026, an eligible person can direct up to $111,000 from an IRA to qualifying charities and exclude the eligible amount from income. A 457(b) cannot make a QCD directly, so Frank would first need to consider an IRA rollover and the different rules that follow. His required minimum distribution age is not automatically 73. It is generally 73 for someone born from 1951 through 1959 and 75 for someone born in 1960 or later. When RMDs begin, a properly completed QCD can count toward that year’s required amount. This works best for gifts he already intended to make, not money he needs for retirement.
What Frank Should Do This Week
First, Frank should read the IRMAA notice and confirm the tax year, filing status, MAGI, and surcharge tier Social Security used. He can compare the stated MAGI with adjusted gross income and tax-exempt interest on the relevant return. Next, he should check whether he qualifies for HELPS and document the insurance premiums paid. Form SSA-44 can request a lower IRMAA after a qualifying event such as a recent work stoppage, work reduction, divorce, spouse’s death, or loss of pension income that lowered MAGI. Frank’s retirement at 55 years ago would not automatically justify a new reduction. Finally, he should model 2026 income before December 31, while there is still time to change planned withdrawals, sales, and conversions.