Why Wealthy Retirees Are Spending Their 401(k)s First and Letting Social Security Compound to 70

"Consider a married couple, both 65, with $2.5 million in a traditional 401(k) and each entitled to $3,300 a month at full retirement age 67. Filing now would lock in $6,600 a month for the household. Waiting until 70 raises each check by 8% a year in delayed retirement credits, a 24% boost over FRA, lifting each monthly benefit to roughly $4,092 and the household total to $8,184."

"To cover spending in those five years without Social Security, the couple draws roughly $130,000 a year from the 401(k), about $650,000 over the bridge. That is a real cost. The trade is a permanently larger, COLA protected base for the rest of two lives and the survivor's life. Run lifetime totals to age 90. Claiming at 67 produces $3,300 times 12 times 23 years for both spouses, about $1.82 million. Delaying to 70 produces $4,092 times 12 times 20 years for both spouses, about $1.96 million."

"The bigger prize is what these years let you do with the tax code. From 65 until Social Security turns on at 70, taxable income is whatever you choose to pull from the 401(k). That gives five clean years to execute Roth conversions before benefits begin counting toward provisional income, before required minimum distributions arrive at 73, and before the 85% Social Security taxation threshold becomes a permanent feature of your return."

"Drawing $650,000 out of a $2.5 million pre tax balance also shrinks the future RMD base by roughly a quarter, which compounds into smaller forced withdrawals every year of the couple's 70s and 80s. That is the second hidden payoff most break even calcu"

Affluent couples are spending down 401(k) assets between ages 65 and 70 while delaying Social Security until 70 to lock in a larger, inflation-protected benefit for life. A married couple with $2.5 million in a traditional 401(k) and $3,300 per month at full retirement age 67 would receive $6,600 per month if claiming immediately. Waiting until 70 increases each benefit by delayed retirement credits, raising each monthly check to about $4,092 and the household total to $8,184. The cost is drawing about $130,000 per year from the 401(k) for five years, totaling about $650,000. Lifetime totals to age 90 can be roughly $140,000 higher when delaying, especially after accounting for the survivor’s benefit. The bridge years also allow Roth conversions and income management before provisional income, required minimum distributions, and Social Security taxation thresholds become persistent.

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