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 converted amount is added to your taxable income in the year of conversion, but future growth and qualified withdrawals from the Roth are tax-free.

Think of it as paying the tax bill now to eliminate it later.

Key Benefits and Long-Term Advantages

Roth conversions offer several advantages:

  • Tax free growth and withdrawals: Future earnings escape taxation, ideal for long horizons.
  • No lifetime RMDs: Avoid forced distributions that trigger taxes, preserving wealth.
  • Heir benefits: Most non-spouse heirs must empty an inherited IRA within 10 years. With a traditional IRA those withdrawals are taxable income for the heirs, often in their own peak earning years. With a Roth, the same 10-year rule applies but the withdrawals are tax free.
  • Estate planning: Reduces taxable estate value since heirs inherit tax-free.
  • Flexibility: Hedge against rising future tax rates or brackets

When Does a Roth Conversion Make Sense?

1. You're in a Temporarily Low Tax Bracket

Conversions are most powerful when you convert during years with unusually low income, such as:

  • Between retirement and age 65 (before Medicare) or age 73 (before RMDs begin)
  • A year with significant business losses or deductions
  • A gap year between jobs
  • Years with large charitable deductions or medical expenses

2. You Expect Higher Tax Rates in the Future

This could happen because of:

  • Anticipated income growth from career advancement or business success
  • Future pension or Social Security income pushing you into higher brackets
  • Large traditional IRA/401(k) balances that will generate substantial RMDs
  • Potential federal tax rate increases

3. You Have a Long Time Horizon

The longer your money can grow tax-free in a Roth, the more valuable the conversion. This favors:

  • Younger individuals
  • Those converting for the benefit of heirs
  • People who don't anticipate needing the funds for 10+ years

4. You Can Pay the Tax From Outside Funds

Using non-retirement money to pay the conversion tax keeps the full converted amount working for you. If you must pay tax from the converted funds themselves, the benefit is significantly reduced.

5. You Want to Reduce Future RMDs

Traditional IRAs require minimum distributions starting at age 73 (increasing to 75 in 2033). Roth IRAs have no RMDs during your lifetime. Converting reduces future RMDs, which can:

  • Keep you in lower tax brackets
  • Reduce Medicare premium surcharges (IRMAA). Note the reverse is also true: a large conversion in a single year can itself raise your Medicare premiums two years later, which is one reason we size conversions rather than converting everything at once.
  • Preserve more wealth for heirs

6. Estate Planning Considerations

Roth IRAs offer advantages for beneficiaries:

  • Inherited Roth IRAs are generally income-tax-free to heirs
  • Under the 10-year rule for most non-spouse beneficiaries, spreading tax-free Roth distributions is more flexible than taxable traditional IRA distributions
  • You effectively prepay the tax, transferring more after-tax wealth

Key Strategies

Partial Conversions ("Bracket Filling")

Rather than converting everything at once, convert just enough each year to "fill up" your current tax bracket without spilling into the next one. This spreads the tax impact over multiple years at lower rates.

Example: If you're married filing jointly with $150,000 of taxable income, you're in the 22% bracket, which ends at $211,400 for 2026. You could convert about $61,000 and stay inside the 22% bracket.

The "Retirement Gap" Years

The period between retirement and when RMDs and Social Security begin is often ideal for conversions. Income is typically lower, providing an opportunity for strategic conversions at reduced rates.

Roth Conversion Ladder

For early retirees, a conversion ladder involves converting amounts each year, then waiting five years before accessing those converted funds. This creates a pipeline of accessible Roth funds.