Roth Conversions and IRMAA: Is the Tax Savings Worth the Medicare Cost?
If you’re exploring a Roth conversion, you’re probably trying to answer three practical questions:
- So what? A conversion could meaningfully improve (or complicate) your retirement plan.
- What’s in it for me? Potentially more tax flexibility, fewer future Required Minimum Distributions (RMDs), and a cleaner income strategy.
- Can George Wealth Management help me make this decision? Yes—by modeling the tradeoffs across taxes, Medicare, cash flow, and estate planning so the decision fits your full picture.
The temptation is to treat Roth conversions like a simple “good or bad” move.
“Convert your IRA to a Roth and you’ll never pay taxes again.”
That idea is catchy—but incomplete.
A Roth conversion can be valuable in the right situation. It can also raise your taxable income today, increase Medicare premiums later, and require a real cash outlay to pay the tax bill. The better question usually isn’t “Should I convert?” but:
How much should I convert—and when?
The Best Tax Decision Isn’t Always the Lowest Tax Bill This Year
Retirement planning is rarely optimized by focusing on a single year. A conversion might increase your taxes this year, but reduce taxes later. Or it might increase taxes and Medicare costs without creating much long-term benefit.
What you want is an efficient lifetime strategy, not just a lower bill in April.
What Is a Roth Conversion?
A Roth conversion moves money from a Traditional IRA (or other pre-tax retirement account) into a Roth IRA.
- The amount converted is generally taxable income in the year you convert.
- Once the money is in the Roth, it can potentially grow tax-free, and qualified withdrawals are generally tax-free.
In other words, you’re voluntarily paying tax now in exchange for potentially greater flexibility later. Whether that trade is attractive depends on your income, tax bracket, future RMDs, Medicare considerations, and your goals for the money.
Why Tax Brackets Matter (and Why “Bigger” Isn’t Always “Better”)
Every dollar you convert stacks on top of your other income for the year. That means a large conversion can push you into higher marginal tax brackets.
Many retirees use a deliberate strategy often described as “filling up a bracket.” Rather than converting a large amount all at once, they may convert just enough each year to reach a target bracket—especially in years when income is temporarily lower.
This approach can be useful in the “gap years” that sometimes occur:
- After you stop working, but before Social Security begins
- Before RMDs start
- Before a business sale or other liquidity event
The objective isn’t to eliminate taxes. It’s to pay taxes thoughtfully over time so your retirement income plan stays flexible.
Roth Conversions Can Increase Medicare Premiums (IRMAA)
Here’s the part many people don’t see coming: Roth conversions can affect Medicare premiums.
Medicare uses IRMAA (Income-Related Monthly Adjustment Amount) to determine whether you pay more for Medicare Part B and Part D. If your income crosses certain thresholds, your premiums can increase.
Two details matter:
- A conversion increases your income for that year (because the converted amount is generally taxable).
- Medicare typically looks at your tax return from two years prior to set premiums.
So a conversion in 2026 may affect Medicare premiums in 2028.
That doesn’t automatically mean conversions are a bad idea. It means the analysis should be honest about the tradeoff:
- Potential benefit: more tax-free assets later, possibly lower future taxable income
- Potential cost: higher Medicare premiums for a period of time
Often, the best plan is not “convert everything” or “convert nothing,” but a targeted amount designed to manage both tax brackets and IRMAA exposure.
(Internal link suggestion: Schedule a Retirement Planning Conversation)
Today’s Taxes Could Reduce Tomorrow’s RMDs
Traditional IRAs are generally subject to Required Minimum Distributions (RMDs). As the account grows, future RMDs can grow as well—sometimes forcing taxable income higher later in retirement.
Higher RMDs can:
- Increase taxable income
- Push you into higher tax brackets
- Increase IRMAA-related Medicare premiums
- Reduce your ability to control your tax situation later
Strategic Roth conversions may reduce future RMDs by moving assets into a Roth IRA, which is generally not subject to lifetime RMDs for the original owner.
This can be particularly relevant for households that have accumulated significant pre-tax balances and want to avoid a future “income spike” once RMDs begin.
(Internal link suggestion: Retirement Assessment)
How Will You Pay the Tax?
A practical question often gets overlooked: Where will the tax money come from?
In many cases, the cleanest way to execute a conversion is to pay the tax using funds outside the IRA—assuming doing so doesn’t compromise your liquidity.
Considerations include:
- Do you have adequate emergency reserves?
- Will paying the tax reduce cash needed for travel, home projects, or healthcare?
- Are you likely to need those funds in the next few years?
A conversion should support your plan—not create stress around spending, reserves, or short-term flexibility.
Roth Conversions Can Affect Your Family and Your Legacy
For many retirees, the Roth conversation isn’t only about their own income—it’s also about what happens to assets later.
Depending on your goals, Roth assets may provide greater flexibility for heirs because qualified distributions are generally tax-free. That said, estate planning is never one-size-fits-all.
A sound decision may involve coordinating:
- Beneficiary planning
- Charitable intentions
- Potential future tax law changes
- The needs and tax situations of the people who may inherit your accounts
The “best” answer is the one that aligns with your priorities and the role this money plays in your overall plan.
Before Choosing an Amount, Model the Decision
A Roth conversion is not just a tax move. It’s also:
- A retirement income decision
- A Medicare decision
- A cash flow decision
- Often, an estate planning decision
Before deciding how much to convert, it can help to model questions like:
- Which tax bracket am I trying to fill?
- How might this affect IRMAA and Medicare premiums in two years?
- How could conversions change my future RMDs?
- What does my income plan look like with Social Security and other sources?
- Do I have cash available to pay the tax without disrupting my lifestyle?
- How does this decision support my family or legacy goals?
When these factors are reviewed together, the answer is usually clearer—and more tailored.
Better Decisions Begin With Better Coordination
Most people don’t need more Roth conversion opinions. They need clarity about how today’s tax decisions affect tomorrow’s retirement.
That’s the purpose of Project Clarity.
Instead of evaluating taxes, Medicare, retirement income, investments, and estate planning in separate lanes, we help you see how these decisions interact—so you can make an informed choice you feel confident about.
Because the best tax strategy isn’t necessarily the one that minimizes this year’s taxes.
It’s the one that supports your long-term goals.
Your Next Step
A Roth conversion may be a valuable opportunity—or it may not be the right fit for your situation. The best next step is to evaluate the decision in context.
Start with the Retirement Assessment
Identify the planning decisions that may deserve your attention before making changes to your retirement accounts.
→ Take the Retirement Assessment
Learn About Project Clarity
See how our decision-centered process coordinates taxes, Medicare, retirement income, investments, and estate planning.
→ Explore Project Clarity
Retirement Planning
Learn how we help retirees build coordinated income strategies designed around their goals and priorities.
→ Learn About Retirement Planning
Ready to Talk?
If you’re considering a Roth conversion and want to understand how it could affect taxes, Medicare premiums, and your retirement income plan, we’d be happy to help.
→ Schedule a Retirement Planning Conversation