Roth Conversion Explained — Is Converting Your IRA Worth It?

Moving money from a traditional IRA to a Roth costs money now. The question is whether it saves more later. For many families — particularly those facing large required minimum distributions or planning to leave retirement accounts to heirs — the answer is a clear yes. But timing and sizing the conversion matters enormously. A poorly timed Roth conversion can push you into a higher bracket unnecessarily, trigger Medicare premium surcharges, or create a tax bill you're not prepared to pay.

Understanding how conversions work — and more importantly, when the math favors them — is essential before moving a dollar.

How Roth Conversions Work

A Roth conversion is simple in mechanics: you move money from a pre-tax account (traditional IRA, SEP-IRA, rollover IRA, or old 401(k)) to a Roth IRA. The amount converted is added to your taxable income in the year of conversion and taxed at your ordinary income rate. Once in the Roth, the money grows tax-free and qualified withdrawals in retirement are completely tax-free — no required minimum distributions during your lifetime, either.

There is no income limit on conversions. Anyone with a traditional IRA can convert, regardless of income. And there's no limit on the amount — you can convert $10,000 or $1 million in a single year, though the tax implications scale accordingly.

When Roth Conversions Make the Most Sense

The conversion math is most favorable when your current tax rate is lower than what you expect it to be during distribution. The prime windows for conversion are:

• Early retirement before Social Security begins. If you retire at 60 and delay Social Security until 70, you may have 10 years of lower taxable income — ideal for strategic conversions at the 12% or 22% bracket before RMDs and Social Security inflate your income.
• Years before required minimum distributions begin. RMDs start at age 73 under current law and are calculated as a percentage of your traditional IRA balance each year. A large traditional IRA generates large mandatory withdrawals — taxable regardless of whether you need the money. Converting before 73 reduces the RMD base and gives you control over when and how you pay the tax.
• Business owners in a low-income transition year. A year where the business had lower profits, you sold a company, or took a sabbatical may create an unexpected low-bracket window. Seize it.
• When tax rates are expected to rise. The current TCJA rates are scheduled to sunset unless extended. If marginal rates reset to pre-2018 levels, converting now at today's rates locks in the lower cost of conversion.

Partial Conversions — Filling the Bracket

You don't have to convert everything at once. Strategic partial conversions — also called "bracket filling" — involve converting exactly enough each year to fill up the current tax bracket without crossing into the next one. For a married couple with $80,000 in income, the 22% bracket extends to approximately $201,050 in 2026. Converting $120,000 to a Roth at 22% is dramatically cheaper than forcing that same $120,000 out later at 32% or 35% when RMDs and other income stack up.

This approach — repeated annually over a 5–10 year window — can meaningfully shift the composition of your retirement accounts from taxable to tax-free without ever creating a painful tax spike.

The Roth Conversion Ladder — For Early Retirees

The Roth conversion ladder is a multi-year strategy used by early retirees to build a pipeline of tax-free income before age 59½. You convert a set amount annually from a traditional IRA to Roth, then wait five years before withdrawing the converted principal penalty-free. By doing a conversion today, you'll have access to that converted principal in five years without the 10% early withdrawal penalty.

Properly executed, this strategy allows early retirees to live on Roth conversion proceeds — which are penalty-free — while letting other accounts continue to grow. The strategy requires careful coordination of income levels, conversion timing, and available cash to cover living expenses during the wait period. Consult a financial professional experienced with early retirement planning before attempting a conversion ladder.