If you’ve already maxed out your $23,500 elective deferral (plus any catch-up) in your Solo 401(k) and still feel the itch to save more, you’re in the right place. The Mega-Backdoor Roth strategy lets you funnel up to the IRS’s $70,000 annual addition limit into after-tax contributions—and then convert them into Roth dollars for decades of tax-free growth. This step-by-step playbook walks you through plan setup, payroll withholding, conversions, and year-end filings.
