What Is a Roth Conversion? How It Works and What to Review

A conversion can be completed by a trustee-to-trustee transfer, a transfer between accounts at the same institution, or—in some cases—a distribution that is deposited into a Roth IRA within the applicable rollover window. Direct movement between custodians can reduce withholding and timing complications, but the receiving custodian and plan administrator determine the process they support.

You may be able to convert all or part of an eligible balance. A partial conversion is still a conversion: the converted portion leaves the pre-tax account and enters Roth, while the unconverted balance remains under its existing rules.

Traditional retirement accounts often contain deductible contributions and tax-deferred earnings. When those untaxed dollars are converted, the taxable portion is generally included as ordinary income. The conversion is not taxed in isolation: it joins wages, pensions, interest, realized gains, taxable Social Security, and other items on the return.

If any Traditional, SEP, or SIMPLE IRA contains nondeductible basis, Form 8606 may be needed to determine the taxable and nontaxable portions. A household should not assume it can select only the after-tax dollars from one IRA without considering the broader IRA basis rules.

The conversion amount is only one input. A complete review may compare the household’s expected taxable income now and later, the source of cash for taxes, account basis, investment changes, state residence, charitable plans, healthcare subsidies, Medicare status, and Social Security timing.

Time horizon also matters. Roth assets have their own distribution rules, including five-year rules that depend on the type of money and transaction. A conversion should not be evaluated solely from a projected future tax rate or a single online score.

An estimate can organize account balances, ages, income, Social Security timing, and an assumed growth rate into planning questions. It may highlight a period before required distributions or other income begins, but it cannot reconstruct a tax return or recommend a transaction.

Use an estimate to prepare better questions. Before acting, verify current federal and state rules and review the complete household situation with appropriately qualified professionals.