Roth Conversion
The Roth conversion ladder is the FI community's signature tax move. Convert traditional retirement funds to Roth, pay low taxes now, and withdraw tax-free forever.
How the Roth Conversion Ladder Works
During your working years, you contribute to tax-deferred accounts (Traditional 401k/IRA) and get a tax deduction at your highest marginal rate — often 22-32%.
After reaching FI and leaving traditional employment, your income drops. You then convert portions of your Traditional IRA to a Roth IRA each year, paying taxes at your new, much lower rate — often 10-12% or even 0%.
After 5 years, each converted amount becomes available for tax-free and penalty-free withdrawal, regardless of your age.
Building the Ladder: Step by Step
Each rung of the ladder takes 5 years to "season" before withdrawal.
Year 1
Convert $40K from Traditional IRA to Roth. Pay ~$2,400 in taxes (12% on amount above standard deduction). Seasoning begins.
Year 2
Convert another $40K to Roth. Pay ~$2,400 in taxes. 2 rungs seasoning.
Year 3
Convert another $40K to Roth. Pay ~$2,400 in taxes. 3 rungs seasoning.
Year 4
Convert another $40K to Roth. Pay ~$2,400 in taxes. 4 rungs seasoning.
Year 5
Convert another $40K to Roth. Pay ~$2,400 in taxes. 5 rungs seasoning.
Year 6+
Withdraw Year 1 conversion TAX-FREE. $0 in taxes on withdrawal. Ladder producing!
The 5-Year Rule Explained
When you convert money from a Traditional IRA to a Roth IRA, the converted amount (not the earnings) can be withdrawn penalty-free after 5 tax years. Each conversion starts its own clock.
The clock starts on January 1 of the year you make the conversion. So a conversion made on December 31, 2025, starts its clock on January 1, 2025, and is available January 1, 2030.
The Pro-Rata Rule
If you have both pre-tax and after-tax money in your Traditional IRA, you can't cherry-pick which dollars to convert. The IRS treats all your Traditional IRA balances as one pool and applies the pro-rata rule.
Example: You have $95,000 pre-tax and $5,000 after-tax in your Traditional IRA. If you convert $10,000, only 5% ($500) is tax-free — the rest is taxable, regardless of which dollars you "intended" to convert. The fix: roll all pre-tax IRA money into your employer's 401(k) before doing the backdoor, leaving only the after-tax contribution to convert cleanly.
Bridging the 5-Year Gap
How to fund your first 5 years while the ladder seasons.
Taxable Brokerage Account
Investments held outside retirement accounts. Sell shares for living expenses — long-term gains may be taxed at 0% if your income is low enough.
Roth IRA Contributions
Direct contributions (not conversions) to a Roth IRA can be withdrawn anytime, tax and penalty-free. This is "first in, first out" money.
Cash Reserves
1-2 years of living expenses in a high-yield savings account. Gives you flexibility and a safety net while the ladder builds.
Rule of 55 / 72(t)
Penalty-free access to 401(k) funds if you separate from service at 55+, or through substantially equal periodic payments (SEPP) at any age.