Question 1

Why does the converted amount get taxed at all?

Accepted Answer

Traditional IRA contributions were typically made pre-tax, so the money has never been taxed. Converting to a Roth moves it into an account that grows and withdraws tax-free in retirement — but the IRS collects income tax on the conversion now, treating the converted amount as ordinary income for that year.

Question 2

Why does paying the tax from outside cash matter so much?

Accepted Answer

If you pay the conversion tax using money from the IRA itself, that money never makes it into the Roth to grow tax-free — and if you're under 59½, that withdrawn portion can also trigger an early withdrawal penalty on top of the income tax. Paying from separate savings keeps the full converted amount working for you.

Question 3

Can I convert in a lower-income year to save on tax?

Accepted Answer

Yes — this is a common strategy. Since the conversion stacks on top of your other ordinary income, converting during a year with unusually low income (early retirement before Social Security starts, a career gap, etc.) can mean more of the conversion lands in lower tax brackets.

Roth IRA Conversion Tax Calculator

How the conversion is taxed

Common questions