The Three-Bucket 401(k) Withdrawal Hack That Can Save Retirees Six Figures in Taxes

"Their balances: $1.1 million in a traditional 401(k), $700,000 in a Roth IRA with the five-year clock long satisfied, and $600,000 in a taxable brokerage with a $360,000 cost basis and $240,000 of embedded long-term gains. Social Security is deferred until 70, which is the entire reason this works. No Social Security means no provisional-income calculation, no 85% inclusion trap, and full use of the standard deduction against ordinary income."

"Two numbers do the heavy lifting in 2026. With both spouses 65 or older, the MFJ standard deduction lands near $32,300. The 0% long-term capital gains bracket for MFJ filers runs to roughly $96,700 of taxable income. Stack withdrawals against those two ceilings and the math falls into place."

"Step one: pull $32,300 from the 401(k). That hits the return as ordinary income, then the standard deduction erases it. Federal ordinary tax owed: $0. The couple is also draining the pre-tax bucket while they can do it free, shrinking the balance that will eventually drive required minimum distributions at 75."

"Step two: sell $90,000 of brokerage positions. Roughly 60% of each lot is basis returning tax-free; the rest is long-term gain. Layer it on the return: $32,300 of ordinary income plus $90,000 of long-term gains equals $122,300 of gross taxable income. Subtract the $32,300 standard deduction and taxable income drops to $90,000, sitting entirely inside the 0% LTCG band. Capital gains tax owed: $0."

A married couple retired with $2.4 million split across a traditional 401(k), a Roth IRA, and a taxable brokerage account. They spend $145,000 per year and defer Social Security until age 70, avoiding provisional-income effects and the 85% Social Security inclusion threshold. Their plan uses three tax buckets emptied in an order that aligns with the standard deduction and the 0% long-term capital gains bracket. In 2026, they withdraw about $32,300 from the 401(k) to be offset by the standard deduction, owing no federal ordinary income tax. They then sell about $90,000 of taxable holdings so that most of the sale is basis and the remaining long-term gains stay within the 0% capital gains range. Finally, they withdraw the remainder from the Roth IRA, which is tax-free after age 59.5 and after the five-year clock.

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