Withdrawal Sequencing: The Order That Changes Everything

Two households can retire with identical net worth, the same portfolio size, the same Social Security benefit, the same spending target, and still end up paying very different amounts in lifetime tax. The only difference is the order in which they draw down their accounts.

Withdrawal sequencing is the decision of which account funds your spending in a given year: a taxable brokerage account, a tax-deferred 401(k) or IRA, or a tax-free Roth. The order matters because each account type is taxed differently, and the choice you make in one year changes your tax bracket, your Medicare premium, and how much of your Social Security benefit gets taxed, before you have spent a dollar on anything you wanted to buy.

What is the conventional withdrawal order, and why does it fall short?

The rule of thumb taught for decades is simple: spend taxable accounts first, then tax-deferred accounts, then Roth accounts last, preserving the tax-free money for the end of retirement or for heirs. It is easy to explain and easy to follow, which is part of why so many advisors default to it. Retirement income planning is a specialty of its own, and close to six in ten advisors who list it among their top services demonstrate only a basic or intermediate level of proficiency in it, according to a 2026 study from The American College of Financial Services. A rule of thumb built for a general audience is not built for a household with a large pre-tax balance and a complex income picture.

The conventional order does get one thing right. Capital gains in a taxable account are often taxed at preferential long-term rates, well below the ordinary income rates applied to a 401(k) or IRA withdrawal, so spending from taxable accounts first does produce a low tax bill in the early years. That part of the logic holds up.

The approach breaks down by treating a low tax bill as the goal, instead of treating lifetime tax as the goal. A year with almost no taxable income is not automatically a good year if it also means skipping a Roth conversion that would have used that same low bracket for something permanent. The conventional order optimizes each year in isolation. A coordinated sequence optimizes the years together.

It also leaves value on the table. Spending only from taxable accounts in the early retirement years, while a pre-tax balance sits untouched and keeps growing, wastes the lowest-income years of retirement, the same years the Roth conversion window makes valuable. By the time the taxable account runs out and withdrawals shift entirely to the tax-deferred account, RMDs may already be adding forced income on top of whatever the plan needs that year, and the two income sources stack instead of blend.

How does a coordinated sequence work instead?

A coordinated sequence draws from more than one account type in the same year, sized to fill a target tax bracket rather than to empty one account before touching the next. In a low-income year, that might mean living partly off taxable savings and partly off a Roth conversion instead of a plain withdrawal, using the room in a lower bracket on purpose. In a year with a large one-time expense, it might mean pulling more from taxable accounts to avoid pushing ordinary income into a higher bracket.

The account balances do not disappear faster under this approach. They get taxed on a schedule you control, instead of a schedule set by which account happens to run dry first. Withdrawal sequencing done this way treats taxable, tax-deferred, and tax-free accounts as three levers pulled together every year, not three accounts spent down in order, a question covered from a different angle in which account to withdraw from first.

What if you don’t have a Roth account yet?

Some households reach retirement with only taxable and tax-deferred accounts, no Roth balance at all. Sequencing still applies, but the third lever has to be built before it can be pulled. A Roth account created through conversion in the early retirement years becomes available for coordinated sequencing later, which is one more reason the Roth conversion window and the sequencing plan get built together, not one after the other.

A household that waits until the tax-deferred account is the only one left has lost the years when creating that third lever was cheapest, from a tax standpoint. The earlier a Roth balance exists, even a modest one, the more flexibility a coordinated sequence has to work with later.

What do the first eight years look like under each approach?

Here is an illustrative eight-year stretch for a couple spending $150,000 a year in early retirement, before Social Security starts. The figures describe a hypothetical household and are not a projection for your own accounts.

Under the conventional approach, taxable income jumps by about $135,000 in a single year, the year the brokerage account runs out, which can push the household into a much higher bracket when they are least prepared for it. Under the coordinated approach, that jump never happens, because the bracket-filling work already happened during the low-income years, through conversions instead of through unplanned income.

How does sequencing interact with Social Security and Medicare?

Every withdrawal decision in a given year also affects two numbers outside the tax bracket itself.

Provisional income determines how much of a Social Security benefit is taxable, and it is calculated as Adjusted Gross Income plus tax-exempt interest plus half of your Social Security benefit. A withdrawal from a tax-deferred account raises AGI and therefore provisional income. A withdrawal from a Roth account does not, since qualified Roth withdrawals are excluded from AGI. Two households spending the same amount can owe tax on very different shares of their Social Security benefit, depending on which account funded the withdrawal.

MAGI works the same way for IRMAA. A tax-deferred withdrawal that crosses an income tier can raise Medicare Part B and Part D premiums two years later, an amount the Centers for Medicare & Medicaid Services updates each year. A Roth withdrawal of the same dollar amount does not move MAGI at all. The account you choose sets your tax bill, your Medicare premium, and your Social Security tax exposure, all at the same moment.

How does sequencing change across the phases of retirement?

Most descriptions use three phases: taxable-first, then Social Security-coordinated, then RMD-driven. The phases matter less than the transitions between them. A sequencing plan that looks fine in the middle of a phase can still fail at the boundary, the year Social Security starts or the year RMDs begin, if that year was not planned as its own event.

The year Social Security starts is one such boundary. Benefits begin adding to provisional income the moment they arrive, so a withdrawal plan that worked the year before may push more of the benefit into taxable territory the year after, unless the withdrawal mix adjusts at the same time. The year RMDs begin is the other major boundary, covered in more detail in RMD exposure. A sequencing plan tested only against steady-state years, and not against these transition years, is not tested against the years most likely to cause a problem.

Does sequencing work differently with executive income?

Executive income complicates the picture further. Restricted stock that vests on a fixed schedule, non-qualified deferred compensation payouts set years in advance, and a pension that starts on its own timeline all show up as income whether or not they fit the sequencing plan for that year. Deferred compensation tends to arrive on a schedule chosen long before retirement, which means a coordinated sequence has to work around it rather than through it.

A year with a large scheduled NQDC payout is not the year to also run a large Roth conversion. The bracket room that year is already spoken for. A coordinated sequence accounts for these fixed income events first, then fills whatever room is left with conversions or taxable withdrawals, rather than planning conversions and running into the collision afterward.

What does this look like inside a full plan?

Sequencing is the mechanism that connects every other decision in this series. A Roth conversion schedule is a sequencing decision. Managing RMD exposure before it starts is a sequencing decision. Timing a Social Security claim around other income is a sequencing decision. None of them work in isolation from the others, because they all draw on the same tax return in the same year.

A Retirement Income Roadmap models the full sequence, year by year, against your specific account balances, so the withdrawal order, the conversion schedule, and the claiming age get tested together instead of decided one at a time by whichever question comes up first.

What should you do next?

Two steps move a sequencing plan from theory to something you can follow.

First, map your current accounts by tax character (taxable, tax-deferred, and tax-free) and get a year-by-year projection of what conventional sequencing would produce until your RMDs begin, at 73, or 75 if you were born in 1960 or later. Second, test a coordinated alternative against the same years, and compare the two on lifetime tax, not just on next year’s number.

Schedule a conversation with Robert Boeck, to see your own accounts modeled both ways.