Why Spreading a $750,000 Inherited 401(k) Over 10 Years Saves $120,000 in Federal Taxes
This financial analysis article explains the significant tax advantages of spreading an inherited $750,000 401(k) over 10 years rather than taking a lump-sum distribution. Under the SECURE Act, non-spouse beneficiaries must drain inherited retirement accounts within 10 years, with all withdrawals taxed as ordinary income. Using a case study of a married couple earning $150,000 jointly, the article calculates that a lump-sum withdrawal would push taxable income to ~$868,000, resulting in ~$255,000 in federal taxes. Spreading the same amount evenly over 10 years at $75,000 annually keeps taxable income around $193,000, reducing federal tax to ~$135,000—a savings of roughly $120,000. The article also warns that lump sums can trigger IRMAA Medicare surcharges, increase Social Security taxation, and eliminate the 0% capital gains rate. It recommends leveling withdrawals to stay in the lowest possible tax brackets.
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