Roth Conversion Calculator
roth conversion calculator. Get instant, accurate results. Enter values for instant results with step-by-step formulas.
Reviewed by Sahil, Senior Finance & Tax Editor
Formula
Tax Cost = Amount x Current Rate | Future Benefit = Amount x (1+r)^n x (1 - Future Rate) | Traditional Future = Amount x (1+r)^n x (1 - Future Rate)
Roth conversion means paying taxes now at your current rate to avoid paying taxes in retirement. It benefits you if your future tax rate will be higher, or if you have a long time horizon for tax-free growth.
Worked Examples
Example 1: $50K conversion at 24%
Problem:Convert $50K, 24% now vs 32% future, 20 years, 7% return
Solution:Tax now: $12K. Roth grows to $193K tax-free. Traditional $193K taxed at 32% = $131K.
Result:Roth advantage: $61,740 by converting now
Frequently Asked Questions
Is a Roth conversion the same as a Roth contribution?
No. A Roth contribution is new money deposited directly into a Roth IRA, subject to annual contribution limits and income eligibility caps. A Roth conversion moves existing funds from a traditional IRA or 401(k) into a Roth IRA — there is no income limit or annual dollar cap on conversions, which is exactly why high earners who are locked out of direct Roth contributions use conversions (often via the 'backdoor Roth' technique) instead.
How much tax will I owe on a Roth conversion?
The converted amount is added to your taxable income for the year and taxed at your marginal ordinary income rate, just like a traditional IRA withdrawal would be — there is no separate 'conversion tax rate.' Converting a large amount in one year can push part of it into a higher tax bracket, which is why many savers convert smaller amounts spread across several lower-income years instead of one lump sum.
What is a Roth conversion ladder and why do early retirees use it?
A Roth conversion ladder involves converting a portion of a traditional IRA or 401(k) to a Roth IRA each year, typically during early retirement when reported income (and therefore tax rate) is unusually low. Each year's converted amount then becomes available to withdraw tax- and penalty-free after its own individual 5-year waiting period, creating a rolling 'ladder' of accessible funds that lets early retirees tap retirement savings years before age 59½.
What is the 5-year rule for Roth conversions, and how is it different from the 5-year rule for Roth contributions?
Each Roth conversion has its own individual 5-year clock that must pass before that specific converted principal can be withdrawn penalty-free if you're under 59½ (earnings have separate rules). This is distinct from the account-level 5-year rule that applies to your very first Roth contribution or conversion, which determines when qualified withdrawals of earnings become entirely tax- and penalty-free. Tracking multiple conversion years means tracking multiple individual 5-year clocks.
Reviewed by Sahil, Senior Finance & Tax Editor · Editorial policy