Roth IRA Conversion Calculator

Roth IRA Conversion: Should You Convert?

A Roth IRA conversion involves moving money from a Traditional IRA (or 401k) into a Roth IRA, paying income tax on the converted amount now in exchange for tax-free growth and withdrawals later. It's one of the most powerful tax planning strategies available to US investors, but the math depends heavily on your current and future tax rates. Our calculator helps you determine if conversion makes financial sense.

How a Roth Conversion Works

When you convert, the amount is added to your taxable income for that year, and you pay income tax at your marginal rate. Once in the Roth, the money grows tax-free and qualified withdrawals (after age 59½ and the 5-year rule) are completely tax-free. Unlike Traditional IRAs, Roth IRAs have no Required Minimum Distributions (RMDs), making them powerful estate planning tools.

When a Roth Conversion Makes Sense

Your tax rate will be higher in retirement: If you expect higher rates due to income growth, larger required distributions, or potential tax law changes, converting now locks in today's lower rate. You're in a low-income year: Job transitions, sabbaticals, early retirement, or business losses create windows to convert at reduced rates. You can pay the tax from outside funds: Paying the conversion tax from non-retirement savings keeps the full amount growing tax-free in the Roth. Long time horizon: The more years until withdrawal, the more time for tax-free growth to compound. You want to reduce future RMDs: Roth conversions reduce your Traditional IRA balance, lowering future RMDs that could push you into higher brackets.

When to Avoid a Roth Conversion

Your tax rate will be lower in retirement: If you'll be in a lower bracket, it's better to pay tax then. You need to pay tax from the IRA: Withholding tax from the conversion amount reduces the benefit and may trigger a 10% early withdrawal penalty if under 59½. It pushes you into a higher bracket: Consider partial conversions spread over multiple years. You need the money within 5 years: The 5-year rule means earnings withdrawn before the 5-year period may face taxes and penalties.

The Partial Conversion Strategy

You don't have to convert all at once. "Bracket filling" means converting just enough each year to fill up your current tax bracket without spilling into the next one. For example, if you're in the 22% bracket with room for $20,000 more income, convert exactly $20,000. Repeat annually. This systematic approach minimizes the total tax paid on conversions over time.