Which Retirement Account Should You Withdraw From First?

The standard advice is to spend taxable money first, pre-tax money next, and Roth money last — but for most people a blended approach that deliberately fills up a low tax bracket each year, rather than draining one account before touching the next, produces a lower lifetime tax bill.

Here is the arithmetic, the calendar, and the two thresholds that decide most of it.

The Three Buckets, and Why the Order Matters

Before the order matters, the tax treatment of each bucket has to be clear — the order is really just a way of sequencing three different tax outcomes.

A taxable brokerage account holds money you already paid income tax on. Withdrawing your own contributions triggers nothing further. What does get taxed is any growth you realize — generally at long-term capital gains rates on positions held more than a year — and the account also produces its own taxable interest and dividends each year whether or not you touch it. One feature worth a single clause: assets held in a taxable account until death typically receive a stepped-up cost basis, which can eliminate the embedded gain for heirs entirely — the mechanics of that belong to estate planning, not here.

A tax-deferred account — a traditional 401(k), a traditional IRA, a traditional 403(b) — holds money nobody has paid tax on yet, neither the contribution nor the growth. Every dollar that comes out is taxed as ordinary income in the year it’s withdrawn, at whatever your marginal rate happens to be that year. There’s no capital-gains treatment inside these accounts and no way around the ordinary-income label.

A tax-free account — a Roth IRA or Roth 401(k) — is the mirror image. It was funded with money already taxed, and a qualified withdrawal produces no taxable income at all. That matters well beyond the withdrawal itself: because a qualified Roth withdrawal never enters adjusted gross income, it never enters the two calculations, covered later on this page, that determine how much of a Social Security benefit is taxed or whether a Medicare surcharge tier is crossed. That single fact is why Roth money behaves so differently from the other two once retirement income is in motion.

This article is about which of these three buckets you draw from, in what order, and what that order does to your tax bill over decades. If your actual question is how much you can safely withdraw each year without running out of money, that’s a related but separate question, and Retirement Income Planning: Make Your Savings Last answers it directly.

The Standard Advice, and Where It Breaks

For decades, the default advice has been to spend accounts down in a fixed sequence: taxable money first, tax-deferred money second, tax-free money last. The logic isn’t wrong — it lets the most tax-advantaged accounts compound for the longest possible time, and it’s simple enough to explain in one sentence.

The flaw shows up years later. Spending the taxable account first while leaving the tax-deferred account untouched produces very low taxable income early in retirement — often well below what the standard deduction and the lowest brackets could actually absorb. Then, once mandatory distributions from the tax-deferred account begin, a much larger balance has to come out at once, stacked on top of whatever Social Security and other income already exist. A study published in the Journal of Financial Planning modeling comprehensive tax-efficient withdrawal sequencing found that this pattern tends to waste the low-income years and can push a retiree into a higher bracket than a more deliberate sequence would have produced.

A blended approach — sometimes called bracket filling or proportional withdrawals — draws from more than one bucket in the same year, deliberately topping up taxable income to the edge of a chosen bracket rather than under-filling it early and overshooting it later. Professional-body research on this question is fairly consistent that a blended approach frequently produces a lower lifetime tax bill than the strict conventional sequence — but “frequently” is not “always,” and a page that says the standard order is always wrong would be just as unhelpful as one that repeats it without question. Marginal rates work in bands, not as one flat rate on all income — a fact that matters for everything that follows on this page.

What Happens If You Leave the Pre-Tax Account Alone

Here is the mechanism working quietly in the background while a taxable account gets spent down first: an untouched tax-deferred balance keeps growing, and every dollar of that growth is still fully taxable as ordinary income whenever it eventually comes out.

Once mandatory distributions begin, the account no longer waits for a convenient year — the withdrawal is required, in an amount set by the balance and the account owner’s age, whether or not the income is wanted. A large balance can force a large distribution, which can push the marginal bracket higher, make a larger share of Social Security taxable, and cross a Medicare surcharge tier — all at once, from a single event. The age these distributions start, and how the required amount is calculated, are set by federal rules with their own age table and their own penalty for missing one; RMD 2026: Age, Tables, and How to Avoid the Taxes covers both in full.

There’s a consequence here that almost never makes it into consumer retirement content: if one spouse dies, the survivor typically files as a single taxpayer the following year, and the same tax-deferred balance — or what’s left of it after a mandatory distribution — now lands in brackets and thresholds that are roughly half as wide as a joint return’s. A distribution that fit comfortably inside a joint return’s income can spill into a much higher single-filer bracket, with a smaller standard deduction and no spouse’s income to share the load. It’s one of the strongest arguments for smoothing tax-deferred income earlier, while both spouses are alive to use the wider brackets together.

A pre-tax account also carries its own rules once it passes to an heir — inherited tax-deferred accounts have their own distribution timeline and tax treatment, separate from what happens during the original owner’s lifetime. That’s a different article’s job, not this one’s.

Bracket Filling: The Alternative

Bracket filling starts from the plain mechanics of a progressive tax system: each additional dollar is only taxed at the rate for the band it falls into, not at one flat rate applied to all your income. A retiree with room left in the current year’s bracket has headroom — and headroom that goes unused in a low-income year doesn’t roll over. It’s simply gone.

The method draws from more than one bucket in the same year to use that headroom on purpose. In practice this usually means taking a measured amount from the tax-deferred account — enough to reach the top of a chosen bracket, no further — and covering the rest of the year’s spending from the taxable account or, where it exists, the tax-free account. The goal isn’t to avoid tax on the tax-deferred money; it’s to choose which bracket pays it, in a year when the rate is lower than it’s likely to be once mandatory distributions and full Social Security income arrive together.

The Gap Years

For most retirees there’s a window of years that general retirement content rarely dwells on, but that carries more tax leverage than almost anything else in the plan: the years after full-time work ends and before mandatory distributions and full benefit income arrive together.

The dates for these phases come from the reader’s own ages, not from a published table here — When to Take Social Security: 62 vs 67 vs 70 covers the separate decision of when to start benefits, and that choice changes how wide this window is.

That middle window is often the cheapest tax years a retiree will see for the rest of their life, because there’s no employment income, often no mandatory distribution yet, and sometimes not even full benefit income to fill the bracket. Bracket headroom in these years is cheap in a way it rarely is again.

There’s a second, narrower boundary inside this window worth naming without turning it into its own topic: income in the years before Medicare eligibility can affect the cost of health coverage obtained through other means, which is one more reason this window isn’t unlimited and isn’t free to fill without a second thought.

Using the Window: Conversions

Converting money from a tax-deferred account into a tax-free account is a taxable event in the year the conversion happens, in full, at ordinary income rates. That’s true no matter how the conversion is described, and it’s worth stating plainly because a common search asks how to convert to a Roth account without paying tax: there is no version of moving pre-tax money into a Roth account that skips the tax. What can be managed is the rate at which that tax is paid and the year it’s paid in — not whether it’s paid at all.

Converting during the gap years uses the same headroom logic as bracket filling: convert an amount that fills a target bracket in a low-income year, rather than letting the same money emerge later as a much larger, involuntary distribution taxed at a higher rate. Paying the tax on the conversion from money outside the retirement account, rather than withholding it from the amount converted, preserves more of the converted balance to grow tax-free afterward.

One practical trap: a conversion adds to the income counted in both threshold calculations on this page for the year it happens, including the Medicare surcharge’s lookback — so a large conversion in one year can raise a premium two years later even though nothing else about that later year changed. The mechanics of the conversion itself — the pro-rata rule for accounts holding both pre-tax and after-tax money, the deadlines, and each conversion’s own five-year clock — belong to Roth IRA Conversion: Taxes, Deadlines and the Pro-Rata Trap, worth reading before converting anything.

How Withdrawals Make Your Social Security Taxable

Whether a Social Security benefit is federally taxable, and how much of it, is decided by a specific formula, not a flat rule. The formula adds up other income — adjusted gross income excluding the benefit itself — plus any tax-exempt interest, plus half of the year’s Social Security benefit. The result is called provisional income, sometimes combined income.

For the 2026 tax year, a single filer with provisional income below $25,000 owes no federal tax on Social Security benefits. Between $25,000 and $34,000, up to 50% of the benefit becomes taxable. Above $34,000, up to 85% can be taxed — that 85% is a ceiling, not a rate that keeps climbing with income. For a married couple filing jointly, the same three tiers sit at $32,000 and $44,000. A person who files separately and lived with their spouse at any point in the year has a base amount of $0, so a share of their benefit is taxable from the first dollar of other income.

Here’s the fact that explains why more retirees get caught by this every year: these thresholds are set in federal law and are not adjusted for inflation. The $25,000/$34,000 and $32,000/$44,000 figures were fixed in 1983 and 1993 and haven’t moved since — every Social Security cost-of-living increase, and every added dollar of ordinary retirement income, pushes more people over lines that never move to meet them.

This is the single most actionable sentence in this section: a withdrawal from a tax-deferred account adds directly to provisional income, dollar for dollar, while a qualified withdrawal from a tax-free account generally doesn’t touch it at all. That’s one more reason the withdrawal order matters years before mandatory distributions ever force the issue.

One more 2026 figure worth knowing, described in general terms since it doesn’t change how benefits themselves are taxed: filers age 65 and older can claim an additional deduction of up to $6,000 per qualifying person for the 2025 through 2028 tax years, on top of the regular and age-65 standard deductions, phasing out at higher incomes. It reduces overall taxable income for many households, but it’s a separate provision from the formula above — it doesn’t change the provisional-income thresholds or how much of a benefit gets counted toward them.

The Medicare Surcharge Cliff

The Medicare income-related surcharge doesn’t work like a tax bracket. It’s a cliff: cross an income threshold by even one dollar, and the higher premium applies to the entire year, for both Medicare Part B and Part D — not just to the income above the line.

It’s also assessed on a lookback. A 2026 Medicare premium is set using the income reported on a 2024 tax return, not 2026 income. A large withdrawal or a Roth conversion made this year doesn’t show up as a higher premium until two years from now — which is exactly why it surprises people. The decision and its cost land in different years, with nothing in the moment to connect them.

For 2026, the first surcharge tier applies once modified adjusted gross income from 2024 exceeds $109,000 for a single filer or $218,000 for a married couple filing jointly. There are several tiers above that one, each adding its own premium amount for Part B and Part D. A life-changing event, including retirement itself, may support a request for reconsideration. The full tier table, and how to request that reconsideration, live in IRMAA 2026 Brackets: How to Avoid the Medicare Surcharge.

Why Roth Money Usually Goes Last (and When It Shouldn’t)

Distributions from a tax-free account follow their own ordering rules, separate from the withdrawal-sequencing question this article is about. Money comes out in a defined order — original contributions first, then converted amounts, then investment earnings last — and each layer has its own condition for coming out tax-free. Contributions can generally be withdrawn at any time without tax or penalty. Converted amounts can generally come out without additional tax once the owner is 59½ or that specific conversion is at least five years old, whichever happens first. Earnings need both the account’s own five-year clock and a qualifying condition, such as reaching 59½, before they can come out tax-free.

The usual advice to spend Roth money last isn’t really a rule — it’s a reason, once you see what a Roth withdrawal doesn’t do. Because a qualified withdrawal never touches provisional income or the Medicare surcharge calculation, it’s the only one of the three buckets that can fund a large, one-off expense without moving either threshold. That makes it uniquely useful in a year when other income is already high — closer to a pressure valve than a source to be depleted on a fixed schedule.

There are legitimate reasons to spend it earlier: a year with unusually high other income, where a taxable or tax-deferred withdrawal would do more damage to the two thresholds, or a plan to leave more of the tax-deferred balance to a charity, which can pass to certain charitable beneficiaries under different tax treatment than an individual heir would receive. Beyond that one clause, that’s a separate topic.

What a Plan Actually Looks Like

None of this produces a plan once and leaves it alone. The plan is rebuilt every year, because tax brackets move with inflation, account balances move with markets, and other income — a pension, part-time work, Social Security — moves too.

Late in the year tends to be when the arithmetic is clearest, because most of the year’s other income is already known, with time left to act on what remains of the current bracket before December 31 closes the year for tax purposes.

One more variable belongs on the list without becoming its own section here: state tax treatment of retirement income varies enormously, from states that tax it like any other income to states that exempt Social Security, pensions, or retirement account withdrawals outright. That’s worth checking against your own state before turning any of this into a plan, but it’s a different article’s job.

Given the size of the numbers involved, and how hard some of these decisions are to reverse once made, this is genuinely an area where paying for a few hours of a tax professional’s time is usually worth more than it costs — not because the concepts here are impossible to learn, but because a specific state return, an employer pension’s particular tax treatment, a spouse’s separate accounts, or an unusual year can each change the arithmetic in ways a general article can’t account for.

Frequently Asked Questions

Which retirement account should I withdraw from first?

There’s no single account that’s correct for everyone. The traditional answer is taxable, then tax-deferred, then tax-free, but a blended approach that fills a target bracket each year, using more than one bucket at once, frequently produces a lower lifetime tax bill — the right mix depends on your balances, other income, bracket, state, and time horizon.

Is the taxable-then-pre-tax-then-Roth order wrong?

It’s not wrong, but it’s a starting point rather than a rule. It works well for small pre-tax balances or a short time horizon, and works less well when a large tax-deferred balance is left to grow untouched into a forced, high-tax income event later.

What is bracket filling?

Bracket filling means deliberately drawing enough from a tax-deferred account to reach the top of a chosen tax bracket in a given year — no more, no less — rather than leaving that bracket’s room unused. It uses more than one account in the same year to hit that target.

Should I spend my Roth account last?

Usually, yes, but not as an arbitrary rule — a qualified Roth withdrawal doesn’t affect Social Security taxation or the Medicare surcharge, so it’s most valuable saved for years when other income is already high and every other dollar would move one of those thresholds.

What are the gap years and why do they matter?

The gap years are the window between leaving work and the point where mandatory distributions and full benefit income arrive together. They’re often the lowest-taxable-income years of a retirement, which makes them the cheapest years to fill a bracket or convert money to Roth.

Can I convert to a Roth without paying taxes?

No. Converting pre-tax money to a Roth account is a taxable event in the year of the conversion, in full, at ordinary income rates. What can be managed is the rate and the year the tax is paid — not whether it’s paid.

Should I convert during the gap years?

It’s often one of the more effective uses of that window, since converting fills a target bracket while rates are low, rather than letting the same money emerge later as a larger, involuntary distribution. Whether it’s right for you depends on your balances, timeline, and the two thresholds covered on this page.

Do 401(k) withdrawals make my Social Security taxable?

Yes. A withdrawal from a tax-deferred account like a 401(k) or traditional IRA adds directly to the provisional income that determines how much of a Social Security benefit is taxed.

Why do more retirees pay tax on their benefits every year?

Because the income thresholds that determine benefit taxation are fixed in federal law and have not been adjusted for inflation since 1983 and 1993. As Social Security’s own cost-of-living adjustments and other retirement income rise, more retirees cross thresholds that never move.

How do withdrawals affect my Medicare premiums?

A large withdrawal or Roth conversion can raise modified adjusted gross income enough to cross an income-related surcharge tier, which raises Medicare Part B and Part D premiums for the entire year that tier applies to — not just for the income above the line.

Why does a withdrawal this year raise a premium two years later?

Because the Medicare income-related surcharge is assessed using a two-year lookback — a 2026 premium is based on 2024 income. The decision and its cost land in different years.

Does a Roth withdrawal count toward those thresholds?

A qualified Roth withdrawal generally counts toward neither threshold, since it isn’t included in adjusted gross income at all.

What happens if I just leave my pre-tax account alone?

The balance keeps growing, and every dollar of that growth is still fully taxable as ordinary income once it comes out. Left alone long enough, it produces a larger mandatory distribution later, which can raise your bracket, increase how much of your Social Security is taxed, and trigger the Medicare surcharge all at once.

Does the plan change if my spouse dies?

Often significantly. A surviving spouse typically files as single the following year, which means the same income lands in narrower brackets and thresholds than a joint return allowed, with a smaller standard deduction and no spouse’s income to share the load.

How often should I redo this?

Every year. Brackets, balances, and other income all move, and late in the year — once most of the year’s other income is known — is usually the clearest time to finalize the plan before the tax year closes.

Do I need a professional for this?

For most people facing a decision of this size, yes — a few hours of a qualified tax professional’s time is usually worth more than it costs, especially once state taxes, a pension’s specific treatment, or a spouse’s separate accounts enter the picture.