Broker Check
Smart Roth Conversions: Lower Your Taxes, Secure Your Retirement

Smart Roth Conversions: Lower Your Taxes, Secure Your Retirement

April 29, 2025

Are You Saving Smart—Or Setting Yourself Up for a Tax Shock?

You've worked hard, maxed out your 401(k), contributed to your IRAs—and now you're wondering:


Am I building a smart retirement strategy… or am I setting up a future tax trap?

If you’re feeling confused about whether to prioritize Traditional or Roth accounts, you’re not alone. The fact is, the old "defer as much income as possible and worry about it later" playbook doesn’t hold up anymore.

Today, we have record levels of national debt, expiring tax cuts, and a future where taxes are very likely to be higher than they are right now – it’s just the math of it.

That’s why it’s critical to questions about Roth conversion planning—and how to find your personal sweet spot between tax-deferred and tax-free money.

Why Are Roth Conversions a Smart Move Before 2026?

Let’s zoom out for a second:

  • The Trump-era tax cuts—officially known as the Tax Cuts and Jobs Act—have a sunset provision which means they are set to expire after 2025. Starting in 2026, federal income tax rates are set to rise automatically unless Congress acts.
  • The national debt? Over $36 trillion and climbing.
  • Former U.S. Comptroller David Walker and studies like the Penn Wharton Budget Model project that taxes could double in the coming decades to keep up with entitlement programs and debt service.

What does this mean?
Taxes today are likely the lowest you’ll see for the rest of your lifetime.

If you're thinking about Roth conversions, your window of opportunity may be in the next few years —before rates jump.

What Are the 5 Questions for Smart Roth Conversion Planning?

#1: When Should You Avoid Converting to a Roth IRA?

Yes, Roth conversions can save you from future taxes—but not if you push yourself into an unnecessary bracket today. That would be painful.

Strategy Tip:
Fill up lower brackets first.
Convert up to the 24% bracket if it makes sense—but think twice before jumping into the 32% or 35% brackets. The same goes for pushing yourself out of the 12% and into the 22% brackets.

2025 Bracket Thresholds (Married Filing Jointly):

  • 12%: Up to ~$96,850
  • 22%: ~$94,301 to ~$206,700
  • 24%: ~$201,051 to ~$394,600

Stay aware of these cutoffs when planning conversions.

#2: How Should I Spread Roth Conversions Over Time?

Roth conversions aren't an all-or-nothing move.
Pacing matters.

Strategy Tip:
Instead of front-loading massive conversions in one or two years (and triggering brutal taxes), spread conversions steadily over a 10-year period if possible.

Think of it like filling up a glass carefully each year without spilling over.

#3: Will Roth Conversions Increase Your Medicare Premiums?

IRMAA—the Income-Related Monthly Adjustment Amount—affects your Medicare premiums if your income is too high.

Yes, Roth conversions can temporarily bump you into higher IRMAA brackets.

Strategy Tip:
View higher premiums as a short-term investment for long-term savings.

Would you rather pay a little more in Medicare premiums now—or allow your pre-tax retirement accounts to grow over time and get slammed with massive RMDs later, which will increase your Medicare premiums and social security taxation for the rest of your life?

It’s a tradeoff—but often a worthwhile one.

#4: What’s the Best Way to Pay Taxes on a Roth Conversion?

One of the biggest mistakes people make is withholding taxes directly from the Roth conversion amount.

When you do that, you shrink the size of your Roth and lose decades of potential tax-free compounding.

Strategy Tip:
If it’s possible, pay the taxes from a separate taxable account (like your brokerage or savings account).

That way, 100% of the converted dollars stay in the Roth—and keep working for you tax-free.

#5: How Much Should You Keep in Traditional IRAs After Converting?

What's the perfect IRA balance to aim for after you’ve finished your conversions?

Benchmark Goals:

  • Married Filing Jointly: ~$400,000 remaining in IRAs
  • Single: ~$200,000 remaining

(If you have a pension or other large taxable income source in retirement, your ideal tax-deferred balance might be even lower—potentially zero.)

Why do these numbers make sense?
Because of your standard deduction, you can often offset RMDs with little to no federal tax impact at these balances.

It’s about precision, not guesswork.

Bonus: Is 50/50 Tax Diversification Still a Good Strategy for Retirement?

Some advisors casually suggest keeping half your money in Roth and half in Traditional accounts. Sounds balanced, right?

Except—it’s based on the false idea that future tax rates are unpredictable.

They’re not.

With massive federal debt and an aging population, the trajectory is clear: higher taxes are coming.

Strategy Tip:
Don’t guess.
Tilt your strategy toward building more tax-free income now, when rates are low—and create flexibility for whatever Washington does next.

What’s the Best Roth-to-Traditional IRA Mix for Retirement?

Meet our fictional couple Mr. & Mrs. Smith:

  • $1 million in Traditional IRAs
  • Retiring at 65
  • No pension
  • Moderate Social Security benefits

Smart Move:
Convert ~$600,000 steadily over 9 years (staying below 24% brackets).
Leave ~$400,000 in Traditional IRAs to generate manageable RMDs in their 70s.

Result:

  • Lower lifetime taxes
  • Reduced exposure to Medicare surcharges
  • Less of their Social Security taxed
  • More money lasting longer for their retirement goals

This isn’t about being radical.
It’s about being strategic and efficient.

How Can Smart Roth Conversion Planning Strengthen Your Retirement?

Strategic Roth conversions and smart asset location can help you:

  1. Lower your total lifetime tax bill
  2. Minimize Medicare and Social Security penalties
  3. Extend the longevity of your retirement portfolio
  4. Leave a cleaner, tax-free legacy to heirs

Ready to Map Out Your Roth Conversion Game Plan?

There’s a huge opportunity window right now—but it won’t stay open forever.


Let’s run the numbers, design a tax-smart strategy, and help you keep more of what you’ve earned.

If you would like to discuss your current situation schedule a free 20-minute call with the link below. 

About the Author

James M. Comblo, CFF
is the President & CEO of FSC Wealth Advisors. His greatest passion in the financial services industry is helping clients live the life they want, not the life they are forced to. To learn more about him clickhere.