An $850,000 traditional IRA looks like a comfortable retirement stash. Every dollar inside it is still owed to the IRS at ordinary income rates. For a 68-year-old single filer, that pretax balance sits behind a tax bill that can easily cross into six figures depending on how and when the money comes out.
The 2026 federal brackets set the rules. A single filer pays 10% on income up to $12,400, 12% up to $50,400, 22% up to $105,700, 24% up to $201,775, 32% up to $256,225, 35% up to $640,600, and 37% above that. The standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly. Pulling the full $850,000 out in a single tax year would push the top slice into the 37% bracket even after the standard deduction.
Required minimum distributions do not begin until age 73 under current rules, which gives a 68-year-old a five-year window before the IRS forces annual withdrawals. That window is where most of the tax-shrinking work happens.
Roth Conversion Ladders in the Gap Years
The standard playbook is a partial Roth conversion each year between retirement and the RMD age. The retiree moves a slice of the traditional IRA into a Roth, pays ordinary income tax on the converted amount, and permanently removes that money from future RMD calculations. Converted balances then grow tax-free and pass to heirs without triggering income tax.
Bracket management drives the sizing. Converting just enough to fill the 12% bracket (taxable income up to $50,400 for a single filer) or the 22% bracket (up to $105,700) prepays tax at a lower rate than a future forced withdrawal might trigger. Over five years, a single filer topping off the 22% bracket could convert roughly $90,000 annually and meaningfully reduce the traditional IRA before RMDs begin.
Qualified Charitable Distributions After 70½
Starting at age 70½, IRA owners can route money directly from the IRA to a qualified charity through a Qualified Charitable Distribution. QCDs count toward the RMD once RMDs begin, and the amount sent is excluded from adjusted gross income entirely. For a retiree already inclined to give, this beats taking the RMD, paying income tax on it, and donating the remainder.
QCDs also hold down AGI, which drives the taxability of Social Security benefits, Medicare IRMAA surcharges, and the amount of long-term capital gains taxed at 0%. Each lever pulled below a threshold compounds the savings elsewhere.
Timing Social Security and Watching AGI
The 2026 Social Security COLA is 2.8%, which lifts benefit checks to keep pace with inflation. Every dollar of Social Security added to income can pull up to 85 cents of that dollar into taxable income once combined income crosses the statutory thresholds. A retiree living on portfolio income during the gap years, while delaying Social Security until age 70, keeps AGI low enough to make larger Roth conversions cheaper.
Core PCE inflation reached 130.08 in May 2026, up from 126.43 twelve months earlier. Bracket thresholds adjust for inflation each year. Social Security’s taxability thresholds and the IRMAA cliffs do not, which quietly pulls more retirees into higher-cost tiers over time.
What the Numbers Look Like in Practice
The Bureau of Labor Statistics puts average annual household expenditures at $78,535 in 2024. Per capita disposable income was $68,391 in the first quarter of 2026. A retiree spending near those figures does not need to withdraw the entire $850,000 quickly, leaving room for a multi-year conversion plan.
The 10-year Treasury yield at roughly 4.6% shapes the asset location decision. Interest from bonds held in a traditional IRA becomes ordinary income when it is distributed through RMDs. Shifting growth assets into the Roth side during conversions tends to leave the tax-inefficient holdings where they already sit, which improves the overall after-tax outcome.
The Takeaway
The six-figure tax bill attached to an $850,000 traditional IRA depends on when the money comes out, in what size chunks, alongside what other income, and whether any of it is redirected before it becomes taxable. The five-year window between age 68 and the start of RMDs at 73 offers the most control a retiree gets. Once RMDs begin, the IRS starts making the timing decisions.
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