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Mega Backdoor Roth Calculator

Find out how much you can contribute through the mega backdoor Roth strategy. Calculate your after-tax 401(k) space, compare tax-free growth vs a taxable brokerage, and see year-by-year projections.

Include federal + state + NIIT (3.8%)
Taxed annually in a brokerage account
Optionality · Mega Backdoor Roth Calculator

Mega Backdoor Roth vs Taxable Brokerage

Year-by-Year Projection

Year Age Roth Value Brokerage (After Tax) Tax Advantage

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