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Roth Conversion Ladder Calculator

Plan your Roth conversion ladder for early retirement. See conversion schedule and when funds become accessible.

Results update instantly.Change any value and the estimate recalculates on the spot.

Money

Roth conversion ladder

Plan Roth conversions from your 401k for penalty-free early retirement withdrawals.

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Total converted by retirement

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  • Est. taxes on conversions (12% bracket)-
  • First conversion accessible-
  • Projected 401k at retirement-

Each converted amount becomes withdrawable penalty-free 5 years after conversion. Tax estimate assumes a 12% effective rate; your actual bracket may differ. Consult a tax professional.

How it works

How the Roth Conversion Ladder Calculator works

Quick answer: Converting $40,000 a year from a $500,000 401(k) for 10 years moves $400,000 into a Roth IRA, with roughly $48,000 of tax at a 12% rate. Each conversion can be withdrawn without the 10% penalty after five tax years, so a 2026 conversion is available from January 1, 2031.

Formula

Total converted = yearly conversion × years
Estimated tax = total converted × 12%
Each conversion is withdrawable without the 10% penalty 5 tax years after the conversion year

The remaining 401(k) grows at the rate you enter, minus the amounts converted each year.

Worked example

$500,000 balance, $40,000 a year, 10 years, 7% growth. Converted $400,000; tax estimate $48,000; 401(k) left after 10 years $430,918.

$500,000 401(k), 10 years, 7% growth

Yearly conversionTotal convertedTax at 12%401(k) leftOpen
$20,000$200,000$24,000$707,247Open
$30,000$300,000$36,000$569,082Open
$40,000$400,000$48,000$430,918Open
$50,000$500,000$60,000$292,753Open
$60,000$600,000$72,000$154,589Open

Assumptions and limits

  • Uses a flat 12% tax rate; conversions above the 12% bracket are taxed at higher rates.
  • 401(k) money usually moves to a traditional IRA before converting; plan rules vary.

Frequently asked questions

How does a Roth conversion ladder work?

You convert 401k funds to Roth each year; each conversion becomes withdrawable penalty-free after 5 years.

Do I pay taxes on conversions?

Yes, conversions count as taxable income in the year you convert.

How does the 5-year rule work for conversions?

Each conversion has its own 5-year clock starting January 1 of the conversion year. Converted amounts withdrawn earlier, before age 59½, can owe a 10% additional tax.