$1.6 Million 401(k) at 62: The Roth Conversion Strategy That Saves $145,000 in Taxes

A dual-income mates earning $300,000 betwixt them, ages 60 and 58, has astir $1.6 cardinal successful pre-tax 401(k) accounts and plans to halt moving astatine 62. Their existent question, the 1 that gets asked connected Bogleheads threads each week, concerns what happens to that pre-tax equilibrium betwixt the time the paychecks halt and the time required minimum distributions statesman astatine 75.

That 13-year model is the astir invaluable tax-planning existent property this mates volition ever own. Used well, it is worthy astir $145,000 successful national taxation savings implicit the archetypal 8 years alone.

Why the Gap Years Change the Math

While working, this mates sits squarely successful the 24% national bracket, which runs from $211,400 to $403,550 of taxable income for joined couples filing jointly successful 2026. Converting accepted 401(k) dollars to a Roth present means paying 24 cents connected each dollar moved, positive authorities tax. There is nary arbitrage.

The infinitesimal they discontinue astatine 62, the representation inverts. With Social Security delayed to 70 and nary RMDs until 75, their lone taxable income is immoderate spins disconnected a taxable brokerage account, positive immoderate tiny pension. Call it $50,000 a year. They driblet from the 24% bracket to the 12% bracket overnight, and the apical of the 22% bracket sits astatine $206,700 of taxable income.

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The Bracket-Filling Conversion

Stack the $32,200 modular deduction connected apical of the 22% threshold and the mates has astir $238,900 of gross income they tin sorb each twelvemonth earlier immoderate dollar gets taxed astatine 24%. Subtract the $50,000 of different income and that leaves astir $188,000 of headroom to person annually astatine a blended complaint of astir 18%.