Don’t Retire Until You Fix This Withdrawal Mistake

Tax & Retirement Planning

The Mistake: Treating Every Withdrawal the Same

Once you retire, you generally have three buckets of money to draw from: a taxable brokerage account, Traditional 401(k)/IRA funds, and Roth accounts. Most retirees withdraw from whichever account is easiest to access — often whatever is closest to hand, or whatever the bank statement happens to show first — without thinking about how each one is taxed. That single habit, repeated year after year for a 20 or 30-year retirement, is one of the most expensive, least visible mistakes in retirement planning.

It’s easy to see why it happens. Almost all retirement content focuses on accumulation — how much to save, which accounts to use, what to invest in. Far less attention goes to decumulation: the order in which you actually draw that money back out once the paychecks stop. By the time most people retire, they’ve spent decades optimizing the “putting money in” side of the equation and given almost no thought to the “taking money out” side — even though the tax consequences of decumulation can be just as large.

Three Buckets, Three Different Rules

Before the withdrawal order makes sense, it helps to be clear on what each account actually is and how the IRS treats it. These account names get thrown around constantly in retirement content and are rarely explained properly:

• Taxable brokerage account — a regular investment account with no special tax treatment going in or coming out. There’s no contribution limit and no penalty for withdrawing early. When you sell investments held longer than a year, gains are taxed at long-term capital gains rates — generally lower than ordinary income tax rates, and $0 in many cases for lower-income retirees.
• Traditional 401(k) or IRA — you got a tax break the year you contributed (in 2026, up to $23,500 a year in a 401(k), or $31,000 if you’re 50 or older with catch-up contributions), so every dollar you withdraw now is taxed as ordinary income, at whatever bracket your total income lands you in that year.
• Roth IRA or Roth 401(k) — funded with money you already paid tax on (2026 IRA limits: $7,000 a year, or $8,000 if you’re 50 or over). Because the tax was already paid up front, qualified withdrawals in retirement are completely tax-free — no matter how large the account has grown.

The core insight is simple: the government taxes each of these buckets at a completely different point in time. Taxable accounts are taxed lightly and continuously as you use them. Traditional accounts defer tax until withdrawal, then tax the full amount as income. Roth accounts pay the tax bill once, up front, and never again. Withdrawal order is really just a question of which tax bill you want to pay first, and which one you want to delay for as long as possible.

The Correct Withdrawal Order

As a strong default — not an absolute rule for every situation — most retirees come out ahead by withdrawing in this sequence:

• Step 1 — Taxable brokerage first. Already taxed at the lower capital gains rate, so spending it down first does the least damage to your tax bracket while leaving your tax-advantaged accounts untouched and compounding.
• Step 2 — Traditional 401(k)/IRA next. Taxed as ordinary income, but drawing it down steadily — rather than letting it balloon untouched for a decade — can help manage the size of future Required Minimum Distributions and keep you from being pushed into a much higher bracket later.
• Step 3 — Roth last. Since Roth money grows completely tax-free for as long as it’s left untouched, leaving it alone the longest maximizes both its growth and its ultimate tax-free value — including for anyone who eventually inherits it.

To make this concrete: imagine a retiree who needs $40,000 a year to cover living expenses. If they take that $40,000 from their taxable brokerage account every year for the first several years of retirement, they pay tax only on the portion that represents investment gains (often a fraction of the withdrawal), at the lower capital gains rate. If instead they reflexively pull the same $40,000 from their Traditional 401(k) each year, the entire $40,000 counts as ordinary taxable income — every single year. Same lifestyle, same spending, a meaningfully different lifetime tax bill.

Why the Order Affects More Than Just This Year’s Tax Bill

Keeping your taxable income lower in the early years of retirement has a ripple effect that goes well beyond the immediate tax return. This is the part most retirement content skips entirely:

Federal Tax Bracket

Every additional dollar of ordinary income — like a Traditional 401(k)/IRA withdrawal — stacks on top of your other income and can push the next dollar into a higher bracket. Capital gains from a taxable brokerage account are taxed separately and, for many retirees living on a modest income, can be taxed at a 0% or 15% rate rather than being added straight into the ordinary income calculation.

Medicare Premiums (IRMAA)

Medicare Part B and Part D premiums are based on your income from two years earlier, through a surcharge called IRMAA (Income-Related Monthly Adjustment Amount). Cross an income threshold — even by a small amount, often because of one large Traditional account withdrawal — and your Medicare premiums can jump for the entire following year. Retirees who keep their taxable income steady and predictable are far less likely to get caught by an unexpected IRMAA tier jump.

Taxable Social Security

Depending on your total income, anywhere from 0% to 85% of your Social Security benefit can become taxable. The formula uses a measure called “provisional income,” which includes your ordinary income withdrawals. A retiree pulling heavily from Traditional accounts can inadvertently make more of their own Social Security benefit taxable — money that could have stayed tax-free with a different withdrawal order.

Required Minimum Distributions

Starting at age 73, the IRS forces you to withdraw a minimum amount from Traditional accounts each year, whether you need the income or not. If those accounts have been left to grow untouched for decades, RMDs can become large enough to push retirees into a much higher bracket than they were ever in during their working years. Drawing Traditional accounts down earlier and more gradually is one of the few ways to reduce the size of that future forced withdrawal.

When It’s Fine to Break the Rule

This withdrawal order is a strong starting point, not a law of physics. A handful of situations genuinely call for a different approach:

• Early retirees. If you retire before 59½ and need bridge income before penalty-free access to retirement accounts, taxable brokerage funds may be your only realistic option anyway — and that’s fine.
• Unusually low-income years. If your taxable income is temporarily low — say, the year between two jobs, or your very first year of retirement before other income sources start — that can actually be the right moment to deliberately pull from Traditional accounts at a cheap tax rate, or better yet, convert them.
• Large medical expenses or other deductions. A year with unusually high deductible expenses can also be an efficient time to realize more ordinary income than usual, since the deductions offset it.

The Bridge Years: An Underused Roth Conversion Window

The stretch of time between when you retire and when Social Security or Required Minimum Distributions begin is often called the “bridge years.” Depending on your age at retirement, that can be a five, ten, or even fifteen-year window where your taxable income is naturally lower than it will ever be again.

During these years, converting money from a Traditional account into a Roth account — paying tax now, at a cheaper rate than you’d likely pay later — lets that money grow completely tax-free from that point forward. It’s one of the most underused strategies in retirement planning, mainly because so few people are told the window exists, and because it requires deliberately generating taxable income at a time when most retirees are trying to minimize it.

A simple way to think about bridge-year conversions: every dollar you convert at, say, a 12% or 15% rate today is a dollar that will never be taxed again — not when it grows, not when you withdraw it, and not when your heirs eventually inherit it. Compare that to leaving the same dollar in a Traditional account, where it keeps growing but carries an unpaid tax bill the entire time, one that eventually gets settled at whatever rate applies decades later, potentially a much higher one once RMDs and Social Security are both layered on top.

How to Build Your Own Withdrawal Plan

None of this requires a finance degree — it requires a bit of organization and a plan made before you actually need the money. A practical starting sequence:

• List every account you have and label each one taxable, Traditional, or Roth.
• Estimate your baseline income in retirement from Social Security, pensions, or part-time work, since this determines how much “room” you have before crossing a tax bracket, IRMAA, or Social Security taxation threshold.
• Default to the taxable → Traditional → Roth order for regular living expenses, adjusting only for the exceptions above.
• Identify your bridge years — the period between retirement and when Social Security or RMDs begin — and evaluate whether a partial Roth conversion makes sense each year during that window.
• Revisit the plan annually, since income, tax law, and account balances all shift year to year. A withdrawal strategy is not something you set once at retirement and forget.

Estimate Your Own Withdrawal Tax Impact

Use the calculator below to see, in simple illustrative terms, how much of a withdrawal survives taxes depending on which account it comes from.