Retirement AI
Mega Backdoor Roth 401(k) Contribution & Conversion Calculator
Calculate your maximum after-tax 401(k) contribution room under the IRS § 415(c) limit and project lifetime tax-free Roth growth and in-plan distribution rules.
Simulation Parameters
Calculated Strategic Output
Total Estimated Benefit
$18,000.00
Instant client-side calculation with zero data retention.