A Retirement Leak Nobody Budgets For: The Tax Drag That Follows You Into Medicare
A taxable income decision you make in your early 60s can quietly reprice your health insurance years later, and most people never see it coming until the bill arrives.
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Two personal finance shows made the same argument on the same weekend: what you earn matters less than what you keep. The Investor’s Podcast Network made that case for savers building a portfolio. Suze Orman made it for people about to enroll in Medicare. Both describe one gap that shows up at two different ages.
In her Medicare open-enrollment episode of Women & Money, Orman put it simply: “A financial decision you made two years ago can affect what you’re paying for Medicare today.” Taxable income you report in your early 60s can reprice your health insurance later.
A Leak That Compounds Quietly for Decades
Tax drag is the part of your return lost to taxes each year. In a taxable brokerage account, it comes from portfolio turnover (when a fund sells winners, realizing gains you owe tax on) and taxable distributions (dividends and capital gains a fund pays out).
Your after-tax return is what you actually keep. Research shows tax drag “can cost people between 1% and 3% of their investment returns,” and more in high-turnover portfolios.
Picture two funds. One earns an average return and trades very little. The other beats it by one percentage point but trades constantly and pays taxable distributions. If those taxes cost more than that one point, the “better” fund leaves you poorer every year, and the gap compounds. As CPA David Fagan put it on the We Study Billionaires podcast: “Ignoring tax is not wisdom, it’s leakage. You don’t live off your pre-tax returns. You pay your groceries with after-tax dollars.”
Medicare Prices You on an Old Tax Return
IRMAA (income-related monthly adjustment amount) is a surcharge added to Part B and Part D premiums for higher earners. Medicare uses a look-back, setting your premium from modified adjusted gross income on an earlier tax return. 2026 surcharges are based on 2024 income.
Most retirees never pay it. According to CMS, IRMAA affects roughly 8% of Part B enrollees.
For those it reaches, IRMAA works like a cliff edge. A single filer at or below $109,000 pays the standard $202.90 a month. One dollar over, and the Part B premium jumps to $284.10.
At the top level, CMS lists a Part B premium of $689.90 and a Part D surcharge of $91.00 a month. Orman added up the two surcharges at “$6,936 a year more for just one person.” (IRMAA is one of several premium traps tied to income from two years ago, and we covered the rest in a free Medicare guide.)
Why Widows Get Repriced
For joint filers, the first threshold is $218,000. For single filers, $109,000. A couple filing jointly on $200,000 of income pays no surcharge. A surviving spouse filing single on similar income falls into the level with a $527.50 monthly premium. This widow’s penalty is “a massive difference, and one reason widows are so often blindsided by Medicare costs,” according to Fagan.
Two Accounts That Plug Both Leaks
Start with the Roth. Money held inside a Roth avoids tax drag while it grows. Qualified withdrawals also stay out of the income figure IRMAA reads. A Roth “is not going to affect IRMAA when you go to take that money out.”
The HSA is next. Fagan says, “An HSA is the only way to save triple tax free: tax write-off when you contribute, tax free while it builds up, tax free if you use it for a qualified medical expense.”
The HSA has an enrollment trap. Part A coverage can apply retroactively for up to six months. Contributions should stop six months before applying for Medicare or Social Security benefits, and “employer contributions count as well.”
Why You Might Convert Anyway
“Do not let IRMAA run your financial life. Don’t avoid a smart Roth conversion simply because you’re afraid of paying more for Medicare,” said Orman. A conversion increases your income for one year, setting off a surcharge later only as long as your income stays high. Meanwhile, the converted money comes out tax free for good.
Don’t count on an appeal. 24/7 Wall St. recently reported that the form used to remove a surcharge after a life-changing event does not list a Roth conversion. So plan the surcharge ahead of time:
- Find your bracket: Take the modified adjusted gross income from your latest return, find it on the CMS table, and note how far you are from the next threshold.
- Size conversions on purpose: Either convert up to just under a threshold, or cross one knowing the premium hit comes two years later, according to Suze Orman’s Women & Money (And Everyone Smart Enough To Listen).
- Check your taxable accounts: Look at each fund’s turnover and distribution history. Consider holding funds with high payouts inside an IRA or Roth.
- Test the single thresholds: Married couples should run their expected income against the single-filer brackets, too.
- Set an HSA stop date: If you’re working past 65, stop contributions six months before you apply, and tell payroll so employer deposits stop as well.
Whether you’re still saving or already on Medicare, the money you get to spend is what’s left after taxes, so plan around that number.
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Trey has been an editor and author at 24/7 Wall St. for more than a decade, where he has published thousands of articles analyzing corporate earnings, dividend stocks, short interest, insider buying, private equity, and market trends. His comprehensive coverage spans the full spectrum of financial markets, from blue-chip stalwarts to emerging growth companies.
Beyond 24/7 Wall St., Trey has created and edited financial content for Benzinga and AOL's BloggingStocks, contributing additional hundreds of articles to the investment community.
Trey's editorial expertise extends across multiple publishing environments. He served as production editor at Dearborn Financial Publishing and development editor at Kaplan, where he helped shape financial education materials. Earlier in his career, he worked as a writer-producer at SVE. His freelance editing portfolio includes work for prestigious clients such as Sage Publications, Rand McNally, the Institute for Supply Management, the American Library Association, Eggplant Literary Productions, and Spiegel.
Outside of financial journalism, Trey writes fiction and has been an active member of the writing community for years, moderating workshop sessions at regional conventions.
