The conventional wisdom says draw from taxable accounts first, tax-deferred accounts second, and Roth last. Like most conventional wisdom in financial planning, it is not wrong so much as it is incomplete. For a household retiring with $3 million and 75% of it locked in pre-tax accounts, following that sequence without modification could cost six figures in unnecessary taxes over a 20-year retirement.

Here is how the decision actually works — and why the answer changes almost every year.

The Standard Sequence and Why It Falls Short

The traditional sequence was designed to maximize tax deferral. By spending down taxable accounts while letting IRAs compound, and preserving Roth for as long as possible, the logic holds at lower income levels. But it was built for a different era — one where fewer people had seven-figure pre-tax balances and where Required Minimum Distributions at 73 were less financially consequential.

For today's pre-retiree with $2.25 million in a traditional IRA and no Roth conversion strategy, the standard sequence creates a slow-motion tax problem. Every year those pre-tax accounts grow, the future RMD grows with them. By age 73, a $2.25 million IRA earning 6% annually without distributions becomes approximately $4.3 million — forcing annual distributions that could easily push $150,000 to $175,000 per year into income, regardless of what you actually need to spend.

A Real Situation

David, 61, and Carol, 60, live in Scottsdale. David is a senior engineer at a defense contractor; Carol is a physician in private practice. Together they earn $350,000 per year. They have $3 million in investable assets: $2.25 million across traditional IRAs and 401(k)s, $600,000 in a taxable brokerage account, and $150,000 in Roth IRAs. They plan to retire in 2028.

When David and Carol walk through the standard withdrawal sequence with a conventional planner, the recommendation is: after retirement, spend from the brokerage account first, let the IRA compound, and touch Roth last. On paper, this preserves tax deferral and stretches the Roth account for decades.

In practice, it hands the IRS a 12-year compounding advantage they will collect at the worst possible time.

The Window Between Retirement and Age 73

David and Carol's most valuable planning asset is not their IRA balance. It is the gap between their retirement date — approximately 2028 — and the year RMDs begin in 2036 for David. For roughly eight years, they will control their taxable income in a way they never could while earning $350,000 and never will again once RMDs begin.

During that window, assuming no Social Security yet and modest brokerage income, their taxable income can be structured almost entirely by choice. That is the moment to ask a different question: not "which account do we draw from?" but "how much income do we want to recognize this year, and from where?"

A Coordinated Withdrawal Strategy for 2028

In their first full year of retirement, David and Carol's earned income drops to zero. If they take no IRA distributions and live on brokerage proceeds, their federal taxable income might be $40,000 to $60,000 from dividends and capital gains — well below the top of the 22% bracket ($201,050 for married filing jointly in 2026, adjusted for inflation by 2028).

That leaves a significant amount of room in the 22% and 24% brackets before hitting the 32% threshold at $394,600. Rather than letting that bracket space go unused, a coordinated strategy converts or withdraws from the IRA to fill the bracket deliberately.

If they withdraw $120,000 from the IRA in addition to living on brokerage income, that $120,000 is taxed at 22–24% now. The alternative is that the same dollars, compounded for 12 years, are forced out as RMDs at potentially 32% or higher — on a much larger balance.

The Brokerage Account Has a Second Role

The taxable brokerage account is not just a spending bucket. It is also a tax management tool. Long-term capital gains for married couples are taxed at 0% up to approximately $96,700 in 2026. In the early years of retirement, selectively harvesting gains at zero — or harvesting losses to offset future gains — is a strategy most households in the accumulation phase never have access to.

David and Carol could, in the same year, take an IRA distribution to fill the 22% bracket and harvest appreciated positions in the brokerage account at 0% if their total income stays below the threshold. These decisions do not happen in isolation. They require seeing all the moving parts simultaneously, which is why most households never execute them.

What Changes When Social Security Starts

The withdrawal sequence shifts again when Social Security enters the picture. Up to 85% of Social Security benefits are taxable depending on combined income. For a household in their late 60s with $2 million-plus in pre-tax accounts, taking Social Security early while simultaneously drawing IRA distributions can inadvertently trigger a higher effective tax rate on their Social Security income than they anticipated.

For David and Carol, the optimal strategy likely involves delaying Social Security to 70 — or at least to full retirement age for the higher earner — using the early retirement years to convert aggressively, and letting the delayed credits build a higher guaranteed income base that also changes how future IRA distributions are sequenced once both income streams run simultaneously.

The Honest Bottom Line

There is no permanent "correct" withdrawal sequence. The answer changes based on your income that year, your bracket, your account balances, what the market did, when you plan to take Social Security, and whether IRMAA is within striking distance. For a household with $3 million and 75% in pre-tax, the decisions made between 2028 and 2036 will have more impact on after-tax wealth than any investment selection over the same period.

The standard sequence is a starting point. A coordinated strategy is the actual job.