Purposeful FIRE🔃Roth IRA Conversion Calculator
See whether converting Traditional IRA funds to a Roth IRA makes sense for your tax situation. The math is straightforward: convert when your current tax rate is lower than your expected retirement rate.
Your Numbers
Your Results
What Is Roth IRA Conversion?
A Roth conversion moves money from a Traditional IRA (or 401(k)) to a Roth IRA, paying income tax on the converted amount now in exchange for tax-free growth and tax-free withdrawals later. The strategy is primarily valuable during the 'tax gap' years common in early retirement: after you've left your high-income job but before Social Security, RMDs, and other income sources push your taxable income back up.
The math is straightforward: convert when your current effective tax rate on the converted amount is lower than your expected future tax rate on the same dollars. What makes this a real planning question, rather than a trivial one, is that the future rate is uncertain and depends on factors like RMD amounts, Social Security taxation thresholds, and potential future tax law changes.
How This Calculator Works
You enter the amount you're considering converting, your current and expected retirement tax rates, your age now and at retirement, and your expected return. The calculator projects what the converted amount would be worth at retirement under both scenarios (Roth vs. staying in Traditional), accounts for the opportunity cost of paying tax now (if you convert, you lose the use of the tax dollars until retirement), and reports which scenario leaves you with more after-tax money.
Personal Considerations
Roth conversions have an unusual personal dimension: they require paying a real, immediate tax bill in exchange for a future benefit that's hard to visualize concretely. People who are otherwise financially disciplined sometimes resist conversions because writing a tax check feels like a loss, even when the math clearly favors it. This is a textbook loss aversion response applied to tax planning.
The early retirement context makes this decision more important and more time-sensitive than most people realize. The window of low-income gap years, between leaving work and when Social Security and RMDs kick in, is typically the only time in your life when you can convert large Traditional IRA balances at lower rates. Missing this window means paying higher rates on the same dollars later, and there's no way to go back.
If what you're feeling goes beyond what a calculator can help with, licensed clinicians are available at SanaNetwork.com, a referral network founded by this site's founder, Dr. Yoendry Torres.
Frequently Asked Questions
You can pay the tax from the converted amount itself, but this is generally suboptimal: you're using pre-tax retirement dollars to pay the tax bill, which is less efficient than paying from taxable savings. If you must withhold taxes from the conversion, reduce the conversion amount accordingly and model the smaller figure.
No. There are no income limits or annual caps on Roth conversions (unlike Roth contributions). You can convert any amount in any year, though you should be careful not to convert so much that the extra income pushes you into a higher bracket, triggers IRMAA Medicare surcharges, or reduces ACA subsidy eligibility.
The converted amount is added to your ordinary income for the year of the conversion. You can pay the tax via estimated quarterly payments or simply ensure your withholding covers it. If you're in an early retirement gap year with low income, you may be able to convert at 0%, 10%, or 12% federal rates, which is often the entire point of the strategy.
Each Roth conversion starts a separate 5-year clock. Converted amounts (not earnings) can be withdrawn tax-free after 5 years from the conversion, regardless of your age. This is the basis of the Roth conversion ladder strategy that many early retirees use to access Traditional IRA funds before 59½ without the 72(t) commitment.