Tax-Efficient Withdrawal Sequencing: Which Accounts to Tap First

Here’s a question I get all the time from people who are about to retire: “Which account should I actually spend first?” A Mesa couple put it to me bluntly last spring. They had a brokerage account, two traditional IRAs, and a Roth, roughly $2.2 million all in, and they assumed the “smart” move was to leave the IRAs alone as long as possible and live off their taxable savings. It’s a reasonable instinct. It’s also, for a lot of people, the wrong default.

The order in which you tap your accounts in retirement, what advisors call withdrawal sequencing, can swing your lifetime tax bill by a meaningful amount. Two retirees with identical savings and identical spending can end up with very different after-tax outcomes purely based on which dollars they spend in which years. Let’s walk through how to think about it.

The Three Tax Buckets

Almost everyone retires with money spread across three types of accounts, and each is taxed differently:

Taxable accounts (brokerage, savings): You’ve already paid tax on the contributions. When you sell, you generally owe tax only on the gains, often at favorable long-term capital gains rates. Interest and dividends are taxed along the way.
Tax-deferred accounts (traditional IRA, 401(k)): You got a deduction going in, so every dollar that comes out is taxed as ordinary income, the highest-rate kind. These are also subject to required minimum distributions later.
Tax-free accounts (Roth IRA, Roth 401(k)): You’ve already paid the tax, and qualified withdrawals come out completely tax-free, with no required distributions during your lifetime.

Because each bucket has its own tax treatment, the question isn’t just how much to withdraw, but where from, and in what order.

The Conventional Order, and Why It’s Only a Starting Point

The traditional rule of thumb says: spend taxable accounts first, then tax-deferred, and save the Roth for last. The logic is to let your tax-advantaged accounts compound as long as possible and defer taxes.

That order isn’t wrong, exactly. It’s just incomplete. Followed blindly, it can backfire. Here’s the trap: if you live entirely off your taxable account in your 60s, your reported income drops very low for several years, which feels great. But your large traditional IRA keeps growing untouched. Then RMDs hit at 73 or 75, and that now-bloated IRA throws off huge required distributions, taxed as ordinary income, on top of Social Security. You can end up jumping into a higher bracket in your late 70s and 80s and staying there.

In other words, the “save the IRA for last” approach can trade low taxes today for much higher taxes later, plus IRMAA Medicare surcharges and a tougher situation for a surviving spouse.

The Better Approach: Bracket Management

The more sophisticated strategy isn’t about emptying one bucket before touching the next. It’s about filling tax brackets deliberately every single year by blending withdrawals across accounts.

In practice, that often looks like this in the early retirement years:

Cover your basic spending from the taxable account (low tax cost).
Then intentionally pull from, or convert, the traditional IRA up to the top of a target tax bracket, capturing those ordinary-income dollars while rates are low.
Leave the Roth largely untouched as your flexible reserve and your tax-free legacy asset.

The goal is to smooth your taxable income across all your retirement years rather than letting it sag low early and spike high later. You’re voluntarily paying a little tax in the low years to avoid paying a lot in the high ones. A tool like our tax-efficient withdrawal calculator can help you see how blending the buckets compares to the conventional one-at-a-time approach.

Why the Roth Goes Last (Usually)

There’s a good reason the Roth typically stays for the end. It grows tax-free, never forces an RMD, and passes to heirs tax-free. It’s also your best tool for controlling income in any given year. Need an extra $30,000 for a new roof or a dream trip to Italy without bumping your bracket, triggering IRMAA, or making more of your Social Security taxable? A Roth withdrawal can deliver that cash with zero added taxable income. That flexibility is incredibly valuable, so you protect it.

The Other Factors That Should Shape Your Sequence

Sequencing doesn’t happen in isolation. The right order for you depends on several moving parts:

Social Security timing. Delaying benefits to 70 creates a low-income window that’s ideal for tapping or converting the IRA at favorable rates.
The widow’s penalty. When one spouse passes, the survivor files as a single taxpayer with narrower brackets. Drawing down the pre-tax balance while both spouses are alive helps protect the survivor.
IRMAA thresholds. Withdrawals raise income that determines Medicare premium surcharges two years later.
Charitable goals and legacy. If you’re leaving money to charity, pre-tax dollars can go there tax-free; if you’re leaving money to children, a Roth is far kinder to them.

This is genuinely complex, multi-variable work, and it’s exactly where conflict-free advice matters. A fee-only fiduciary has no incentive to keep your assets parked in a high-fee product or to discourage you from spending down an IRA, the recommendation is driven by your tax math, not their compensation.

A Simple Example to Make It Concrete

Picture two Gilbert retirees, both 65, both with the same $2 million split across the three buckets, both spending the same amount each year. Retiree A follows the strict “taxable first, IRA last” rule. Retiree B blends withdrawals, taking modest IRA distributions each year to fill a lower bracket while supplementing from taxable accounts. By the time RMDs arrive, Retiree B’s IRA is meaningfully smaller, so the forced distributions are smaller, Social Security is taxed more lightly, and IRMAA stays in check. Same money, same lifestyle, very different lifetime tax outcome. The dollar figures vary by situation, but the direction is remarkably consistent.

The Bottom Line

Withdrawal sequencing isn’t about a rigid rule like “always spend this account first.” It’s about managing your taxable income year by year so you don’t accidentally trade low taxes now for a painful spike later. Done well, it can stretch your portfolio further, lower your lifetime tax bill, and protect a surviving spouse. If you’d like to see what an optimized withdrawal order looks like for your own three buckets, connect with a fee-only fiduciary advisor in Arizona who can build the plan around your numbers.

Important Disclosures

This material is intended for informational and educational purposes only and should not be construed as individualized investment, tax, or legal advice. Consult your own qualified advisor before acting on anything discussed here.

Investing involves risk, including possible loss of principal. Tax rules change and outcomes vary by individual circumstances. Arizona Fee Only is a directory and does not provide investment, tax, or legal advice.