A traditional IRA is a tax-deferred account. Every dollar that went in unreduced by income tax has to come out through the taxable side eventually. For a 68-year-old sitting on $850,000, the immediate concern is what happens between now and the day required minimum distributions begin, and how those forced withdrawals interact with Social Security, Medicare, and the federal tax brackets.
Why the Tax Bill Reaches Six Figures
Under current law, RMDs from traditional IRAs begin at age 73. If the account grows at a moderate 6% annually, an $850,000 balance at 68 becomes roughly $1.14 million by 73. The IRS Uniform Lifetime Table divisor at 73 is 26.5, which produces a first-year RMD of about $43,000. That figure climbs every year as the divisor shrinks. Across a full retirement, cumulative RMD income on a mid-seven-figure IRA routinely lands in the six-figure tax range, and often higher.
The compounding factor most retirees underestimate is bracket stacking. RMDs sit on top of Social Security. In 2026, up to 85% of Social Security benefits become taxable once combined income exceeds modest thresholds. The 2.8% COLA for 2026 raises benefit totals, which increases the taxable portion, pushing IRA withdrawals further into the 22% bracket that begins at $50,401 for single filers and the 24% bracket at $105,701.
Strategy One: Use the Gap Years for Roth Conversions
The window between retirement and age 73 is the most valuable tax-planning space a retiree has. Income is often lower, Social Security may be delayed, and RMDs have not started. A partial Roth conversion each year deliberately fills up the lower brackets. For 2026, a single filer using the standard deduction of $16,100 can withdraw roughly $50,000 from the IRA and still stay within the 12% bracket. Over five years, that shifts a meaningful portion of the balance into an account that never triggers an RMD.
The Roth conversion strategy is time-sensitive. The Roth conversion window narrows every year the retiree delays, because each year of growth increases the future taxable balance and reduces the number of low-income years available before RMDs begin.
Strategy Two: Qualified Charitable Distributions After 70½
Starting at age 70½, a retiree can direct up to $111,000 in 2026 from an IRA straight to a qualified charity through a QCD. The distribution counts against the RMD, but it never appears in adjusted gross income. That matters beyond the income tax line. Lower AGI can reduce the taxable share of Social Security, shrink Medicare IRMAA surcharges, and preserve deductions that phase out at higher incomes. For retirees who already give to charity, routing those gifts through the IRA is more tax-efficient than writing checks from a taxable account and taking the standard deduction.
Strategy Three: Manage the Bracket, Not the Balance
Once RMDs begin, the goal shifts from avoidance to smoothing. Retirees who take only the minimum required often find that, in later years, forced withdrawals are larger as balances continue to grow. Voluntarily distributing more in lower-income years, staying below bracket ceilings, and coordinating with Social Security claiming decisions can flatten the lifetime tax curve. The 10-year Treasury at 4.58% and the federal funds rate at 3.63% also matter here, because the yield on assets held after distribution affects how much of the withdrawal ultimately funds spending versus reinvestment.
Consumer spending offers a reality check. The Bureau of Labor Statistics reports average annual household expenditures of $78,535 in 2024. A retiree pulling $43,000 in RMDs plus Social Security is often distributing more than the household actually needs, which means excess withdrawals are being taxed only to be reinvested in a taxable brokerage account.
What the Numbers Say
The personal savings rate has fallen from 6.2% in early 2024 to 3.9% in the first quarter of 2026, and Social Security transfers reached $1.63 trillion. Retirees today rely more heavily on tax-deferred balances and benefit income than the generation before them. A six-figure lifetime tax bill on $850,000 is the default outcome of doing nothing. Roth conversions during the gap years, QCDs after 70½, and deliberate bracket management are the three levers that meaningfully change that outcome.
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