What is a Roth Conversion Ladder? A Roth Conversion Ladder is a US tax strategy where early retirees annually convert Traditional IRA or 401(k) funds to a Roth IRA, paying income tax now at a low rate, then withdraw the converted principal tax-free after a 5-year waiting period. It is the primary way US-based FIRE practitioners access retirement accounts before age 59½ without penalty.
Worked example: retire at 45 with $1M in a 401(k). Roll it to a Traditional IRA. Starting at age 45, convert $45,000/year to Roth (covered by the 0% and 12% brackets if it is your only income, so very low tax). At age 50, five years later, the first conversion becomes withdrawable tax- and penalty-free. Keep laddering annually until age 59½ when all restrictions disappear. You effectively bridge the gap without SEPP/72(t) lockouts.
The key constraint is the 5-year clock per conversion, and it works best with low or zero other taxable income in early retirement, which matches most FIRE profiles. Bonus: conversions during market downturns capture more shares per dollar converted, boosting future tax-free growth.