Why Some Retirees Pay Thousands More in Medicare Premiums Than Necessary
One of the most frustrating surprises in retirement is getting a Medicare letter that says your premiums are going up.
Not because you changed doctors. Not because your health changed. Not because you bought a different Medicare plan. Simply because your income, as reported to the IRS, crossed a line two years earlier.
For affluent retirees, this is one of those quiet planning issues that can feel small until it shows up. Then it feels very personal. A Roth conversion, a large capital gain, a bonus in the final working year, a required minimum distribution, or the sale of a property can all push income high enough to trigger Income-Related Monthly Adjustment Amounts, better known as IRMAA.
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The Short Answer
Some retirees pay more for Medicare because Medicare Part B and Part D premiums are tied to modified adjusted gross income from two years prior. If your income crosses certain thresholds, your premiums can rise. The mistake is not always having higher income. The mistake is creating higher income unintentionally, without seeing the Medicare impact before the decision is made.
This is why Medicare planning should not sit off to the side. It should be coordinated with Roth conversions, capital gains, IRA withdrawals, Social Security timing, charitable giving, and the way your portfolio generates income.
Why IRMAA Catches Successful Retirees Off Guard
Most retirees understand income taxes. Fewer understand that Medicare premiums are also affected by income. And even fewer realize the timing lag: Medicare generally looks back two years. That means a decision made today can affect premiums later, when the decision itself may feel long forgotten.
This matters because many of the best retirement planning strategies intentionally create taxable income. A Roth conversion may be smart. Realizing capital gains may be smart. Selling a concentrated position may be smart. But if those moves push you into a higher Medicare premium bracket, the full cost should be measured before the trade is made.
That is the difference between tax planning and tax preparation. Your tax return reports what already happened. A coordinated retirement plan asks what should happen, when it should happen, and what else the decision touches. I wrote more about that idea in this piece on what your tax return may be telling a financial advisor that you might miss.
The Roth Conversion Trap
Roth conversions are one of the most valuable tools available to many retirees. But they are also one of the easiest ways to accidentally trigger higher Medicare premiums if they are done without context.
The question is not, “Should we convert?” The better question is, “How much can we convert this year before the next tax bracket, IRMAA tier, or other planning constraint changes the answer?”
For some families, paying a higher Medicare premium for one year may still be worth it if the Roth conversion meaningfully reduces future required minimum distributions or improves the long-term estate plan. For others, crossing a threshold by a few thousand dollars may create a cost that could have been avoided with better timing.
That is why I do not think Roth conversion planning should be a one-time conversation. It should be revisited every year, especially in the years after retirement but before large RMDs begin. If you are thinking about this window, this related article on how affluent families reduce taxes on large IRAs is a helpful companion.
Capital Gains Can Create the Same Problem
Many affluent retirees have taxable brokerage accounts with embedded gains. That is often a good problem. But it still needs management.
Selling a appreciated investment, diversifying a concentrated stock position, rebalancing after years of growth, selling a rental property, or liquidating inherited assets can all raise income in a given year. The investment decision may be correct, but the timing can matter enormously.
Sometimes the right move is to spread gains over multiple years. Sometimes it is to pair gains with tax-loss harvesting. Sometimes it is to use charitable strategies. Sometimes it is to accept the tax cost because the risk reduction is worth it. The point is not to avoid all income. The point is to stop letting income happen accidentally.
Required Minimum Distributions Can Shrink Your Flexibility
Before RMD age, retirees often have more control over taxable income. After RMDs begin, that control may narrow. Large traditional IRAs can force income onto the tax return whether you need the cash or not.
That forced income can increase taxes, raise Medicare premiums, create capital gains stacking issues, and reduce the effectiveness of other planning opportunities. This is one reason the years between retirement and RMDs matter so much. They may be the best years to reduce future IRA exposure through measured Roth conversions, charitable planning, or strategic withdrawals.
The retirees who tend to navigate this well do not wait until the first RMD notice shows up. They start modeling the issue years earlier.
Charitable Giving Can Help, But Only If Structured Correctly
For charitably inclined retirees over age 70½, qualified charitable distributions can be especially useful because they allow money to go directly from an IRA to a qualified charity without being included in taxable income. That can be more powerful than taking an IRA withdrawal, depositing it, and writing a check to charity.
Again, the details matter. A good strategy is not just “give more.” It is “give from the right asset, in the right year, in the right way.”
The Real Goal: More Control
Most wealthy retirees are not trying to game the Medicare system. They simply want to avoid unnecessary surprises.
The families who do this well usually have a year-by-year income plan. They know where income is coming from, how withdrawals are being sequenced, what capital gains may be realized, whether Roth conversions make sense, and where the Medicare thresholds sit in relation to the plan.
That is the kind of planning that often separates a portfolio from a retirement income strategy. The portfolio owns investments. The strategy coordinates the decisions around them.
Final Thought
Paying more for Medicare is not always a mistake. Sometimes it is the cost of making a larger move that still benefits the family over time.
But paying more because no one measured it beforehand is different.
If you have meaningful IRA assets, taxable investments, or a retirement income plan that has not been reviewed through the lens of taxes and Medicare premiums, this is worth looking at before another year passes.
At One Bridge Wealth Management, we help families make thoughtful, tax-aware decisions about retirement, investments, and wealth planning.
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About the Author: John Wahl is a CFP® and ChFC®, co-founder of One Bridge Wealth Management, and was named to the Forbes 2025 Best-In-State Next-Gen Wealth Advisors list. One Bridge is a fee-based independent wealth advisory practice serving high-net-worth families in the St. Louis area. One Bridge Wealth Management acts as a fiduciary when managing assets.
2025 Forbes Top Next-Gen Wealth Advisors, created by SHOOK Research. Presented in Aug 2025; based on 03/31/25 data. Advisors pay a fee to hold out marketing materials. Not indicative of advisor’s future performance. Your experience may vary.
This content is for informational purposes only and does not constitute personalized tax, legal, or investment advice. Please consult a qualified tax professional regarding your specific situation.