Tax-Efficient Withdrawals: Which Retirement Accounts to Tap First

Most retirement planning obsesses over two numbers: how much you save and what rate you withdraw. But there is a third lever, almost invisible, that can add years to how long your money lasts without changing either of those: the order in which you withdraw from your accounts.

Two people can retire with the identical portfolio, spend the identical amount, earn the identical returns -- and one pays tens of thousands more in lifetime taxes than the other, purely because of which accounts they drained first. This guide is about getting that order right. It is the natural companion to the Roth conversion ladder guide, which covers how to access your accounts penalty-free before 59½; this one is about how to sequence your withdrawals to minimize taxes across your whole retirement.

This is an educational overview, not tax advice. Tax rules and thresholds change -- confirm current rules with the IRS or a tax professional before acting.

The Three Buckets

Every dollar you have saved sits in one of three tax buckets, and each is taxed completely differently when you withdraw:

• Taxable accounts (regular brokerage, savings). You already paid tax on the money you put in. When you sell, you owe tax only on the gains -- at favorable long-term capital-gains rates, which are 0% in the lower income brackets. Interest and dividends are taxed along the way.
• Tax-deferred accounts (Traditional 401(k), Traditional IRA). You got a deduction going in, the money grew untaxed, and every dollar you withdraw is taxed as ordinary income -- the least favorable rate. These accounts also carry required minimum distributions later in life.
• Tax-free accounts (Roth IRA, Roth 401(k)). You paid tax going in, and now growth and qualified withdrawals are completely tax-free. Roth IRAs have no required distributions for the owner, and since 2024 neither do Roth 401(k)s.

Knowing which bucket a dollar comes from -- and how it will be taxed -- is the foundation of every decision below.

The Conventional Order: Taxable, Then Tax-Deferred, Then Roth

The classic rule of thumb is to withdraw in this sequence:

1. Taxable accounts first. Spend these down early. The tax cost is low (often just capital gains, sometimes at 0%), and it gets the least tax-advantaged money working for you first.
2. Tax-deferred (Traditional) next. Once taxable is depleted, draw from Traditional accounts, paying ordinary income tax.
3. Roth last. Leave Roth untouched as long as possible so its tax-free growth compounds the longest.

The logic is simple and mostly sound: let your tax-advantaged accounts keep growing, and spend the taxable money that is being taxed every year anyway.

Why the Simple Order Is Not Always Optimal

The flaw in the strict "taxable first, Traditional untouched" approach is that it lets your tax-deferred balance grow large and unspent for years -- and the government will eventually insist on its share, on its schedule, not yours.

The result is lumpy lifetime taxes: very low-income early years (spending taxable money taxed at near-zero) followed by very high-income later years (forced Traditional withdrawals stacked on top of Social Security). You may pay a 0% effective rate in your sixties and a much higher rate in your seventies -- the opposite of smooth. Smart sequencing aims to level out your taxable income across retirement, so you never waste a low bracket and never get forced into a high one.

The RMD Tax Bomb

The specific danger has a name: the RMD tax bomb. Required minimum distributions are the IRS's way of forcing tax-deferred money out of hiding. Under current law they begin at age 73 (rising to 75 for those born after 1959), and the required percentage climbs every year after.

Here is how the bomb is built: you diligently leave your Traditional 401(k) alone for decades. It compounds into a very large balance. Then at 73, RMDs force you to withdraw a sizeable chunk every year whether you need it or not -- all taxed as ordinary income, often stacked on top of Social Security, and large enough to push you into a higher bracket and trigger higher Medicare premiums (IRMAA surcharges). The reward for being too patient with your Traditional account is a tax spike you cannot avoid.

The defense is to draw the bomb down before it detonates -- which is exactly what the next section is about.

The Smarter Approach: Fill Your Brackets

The upgrade to the simple order is bracket management: instead of leaving Traditional accounts completely untouched while you spend taxable money, you deliberately pull some Traditional income (or do Roth conversions) each year to "fill up" your low tax brackets -- even in years you do not need the cash.

The idea: every year you spend at a 0% or 10% effective rate is a year of cheap bracket space you can never get back. By realizing some ordinary income now -- up to the top of a low bracket -- you shrink the Traditional balance that would otherwise explode into RMDs, and you move money into Roth at bargain rates.

A simplified example. Maria, 62, has $600,000 in a Traditional IRA, $400,000 taxable, and $200,000 Roth, and spends $55,000 a year. The naive plan spends only taxable money, showing almost no taxable income -- it feels great now. But it leaves the $600,000 Traditional balance to grow into a seven-figure RMD problem at 73.

Instead, Maria each year withdraws or converts enough Traditional money to fill the bottom brackets -- say up to the top of the 12% bracket -- while covering the rest of her spending from taxable accounts. She pays a modest tax bill in her sixties she would have paid anyway (just later, at a higher rate), steadily shrinks the Traditional account, and builds her Roth. By 73 her required distributions are small and manageable. Same spending, far smaller lifetime tax.

Asset Location vs. Asset Allocation

A related lever is asset location -- where you hold each type of investment, as opposed to asset allocation, which is your overall stock/bond mix. The two are easy to confuse, but location is a free tax optimization on top of whatever allocation you choose.

A common framework:

• Tax-inefficient assets (bonds, REITs, anything throwing off ordinary-income interest) → hold in tax-deferred accounts, where that income is sheltered until withdrawal.
• Stocks and stock index funds (which enjoy favorable long-term capital-gains and qualified-dividend rates) → hold in taxable accounts.
• Your highest-growth assets → hold in Roth, where decades of gains will never be taxed.

You keep the same overall portfolio; you just place each piece in the account that taxes it least. Over a long retirement, the saved tax drag can be substantial.

The Early-Retiree Playbook

For early retirees, withdrawal sequencing has a special opportunity and a special tension.

The opportunity: the years between retiring and the start of Social Security and RMDs are typically your lowest-income years ever. That makes them the ideal window for Roth conversions and bracket-filling -- you can move large amounts of Traditional money to Roth at very low rates, defusing the future RMD bomb and building a tax-free base.

The tension: every dollar of Traditional withdrawal or conversion raises your modified adjusted gross income, which is exactly what determines your ACA health-insurance subsidy. Convert aggressively and you may shrink or lose a valuable subsidy. So the early-retiree decision each year is a balance: how much cheap bracket-filling is worth giving up in health-insurance savings? There is no universal answer -- it depends on the size of your Traditional balance, your spending, and the subsidy you would forgo. The point is to decide the two together, every year, rather than optimizing one and ignoring the other.

Roth Is the Last Bucket for a Reason

Roth accounts earn their place at the back of the line. Their advantages compound the longer you leave them alone:

• Tax-free growth that never gets taxed, so every year untouched is pure upside.
• No required distributions for the owner, so the IRS never forces your hand.
• The best asset to inherit -- heirs can receive Roth money tax-free, making it a powerful estate tool.

That said, "Roth last" is not absolute. Strategically tapping a little Roth in a high-income year -- to cover a big one-time expense without spiking your bracket or your Medicare premiums -- can be smart. The goal is always to smooth taxable income, and occasionally a Roth withdrawal is the cleanest way to do that.

Where the HSA Fits

A Health Savings Account is a quiet fourth bucket with the best tax treatment of all: deductible going in, tax-free growth, and tax-free withdrawals for qualified medical expenses at any age. Because retirement reliably brings medical costs, an HSA is often the first place to spend for healthcare and one of the last to touch for anything else. After 65, non-medical HSA withdrawals are simply taxed like a Traditional account, so a leftover balance is never wasted. If you have one, slot it in as dedicated tax-free medical money -- and remember you can reimburse yourself for past medical bills you paid out of pocket. We cover it fully in the health insurance before Medicare guide.

Two Levers Most People Miss

Beyond the bucket order, two tax moves quietly do a lot of work -- and both reward keeping your taxable income low.

Tax-Gain Harvesting

In a year when your taxable income is low enough to sit in the 0% long-term capital-gains bracket, you can sell appreciated investments in your taxable account, pay zero tax on the gain, and immediately buy them back. This resets your cost basis higher, so there is less taxable gain to pay later. (Unlike harvesting losses, there is no wash-sale wait when you harvest gains.) For early retirees living on low taxable income, deliberately realizing gains at 0% in the gap years is a genuine free lunch -- one of the few in finance. The same caveat applies: realized gains raise your MAGI and can affect an ACA subsidy, so size it accordingly.

Keeping Social Security Untaxed

How much of your Social Security is taxed -- anywhere from 0% up to 85% -- depends on your "provisional income," which counts withdrawals from Traditional accounts but not from Roth. So the source of your spending in the Social Security years changes the tax bill on the benefit itself. Drawing from Roth (or already-taxed taxable basis) instead of Traditional in those years can keep more of your Social Security untaxed -- yet another reason building a Roth balance earlier pays off later.

Watch the Medicare Cliff (IRMAA)

Once you are on Medicare, your premiums are set by your income from two years earlier, and crossing certain income thresholds bumps you to a higher premium tier -- a true cliff where one extra dollar can cost hundreds. When you plan conversions or large withdrawals in your early-to-mid sixties, remember they may raise your Medicare premiums at 65 and beyond. One more reason to smooth income deliberately rather than realize it in big lumps.

A Worked Example: The Phases of a Drawdown

Picture a retiree's tax-efficient drawdown across three phases:

The throughline is the same in every phase: keep your taxable income smooth and your brackets full but not overflowing. A retiree who does this pays a steady, modest tax rate for life instead of near-zero early and painfully high later.

Common Mistakes

• Following "taxable first" off a cliff. Leaving Traditional totally untouched builds an RMD bomb. Blend in some Traditional withdrawals or conversions early.
• Wasting low-income years. A year spent at a 0% or 10% rate without realizing any income is cheap bracket space gone forever.
• Optimizing conversions while ignoring ACA. For early retirees, a big conversion can cost more in lost health subsidy than it saves in tax. Decide them together.
• Spending Roth too early. Roth is your longest-compounding, no-RMD, best-for-heirs bucket. Usually it should go last.
• Ignoring asset location. Holding bonds in a taxable account and stocks in a Traditional account is a small, recurring, avoidable tax leak.
• Forgetting Medicare (IRMAA). Once you are near 65, spikes in income can raise Medicare premiums two years later. Smooth income helps here too.

What This Means for You

Withdrawal order is the quiet, free lever of retirement planning. You do not have to save another dollar or take more risk -- just sequence what you already have intelligently, and you can add years of longevity and save a five- or six-figure sum in lifetime taxes.

The plan is straightforward in outline: use the conventional taxable-then-Traditional-then-Roth order as your skeleton, but layer bracket management on top -- draw or convert Traditional money in your low-income years to fill the cheap brackets and shrink the RMD bomb, balance that against your ACA subsidy while you are pre-Medicare, place your assets in the right accounts, and leave Roth for last. Map your own three buckets and sketch your drawdown by phase; even a rough plan beats withdrawing on autopilot. For how this connects to accessing accounts early and to your overall target, see the Roth conversion ladder and how to calculate your FIRE number.