Mega Backdoor Roth via After-Tax 401(k)

The Mega Backdoor Roth leverages after-tax 401(k) contributions up to $69,000 total, enabling high earners to shelter massive amounts in tax-free accounts. For a 50-year-old contributing $30,000 annually with a 7% return, the tax-free growth exceeds $300,000 over 15 years. Only 30% of employer plans offer this feature, but those that do allow conversions from after-tax to Roth without additional tax if done promptly. This strategy is ideal for maxing out retirement savings beyond standard limits.