Which retirement account to withdraw from first in 2026

1. Why withdrawal order is worth six figures

Most retirees overpay taxes in retirement. Not because they earned too much or saved in the wrong accounts — but because they withdrew their money in the wrong order, in the wrong years, without a plan.

The reason is that retirement savings live in three different “buckets,” each taxed under different rules. A dollar pulled from a taxable brokerage account, a dollar pulled from a traditional 401(k), and a dollar pulled from a Roth IRA produce three completely different tax outcomes — even though all three put the same dollar in your pocket. The order in which you draw them down, year by year, determines how much of your savings you keep and how much goes to the IRS.

The dollar stakes are large. A 24/7 Wall Street analysis of a married couple with $2.4 million spread across traditional, Roth, and taxable accounts found the difference between a smart withdrawal sequence and a poor one was roughly $187,000 in lifetime taxes — money that stayed in the portfolio under the right sequence and went to the government under the wrong one. Fidelity’s modeling shows that even a simple shift from naive sequencing to a coordinated approach can extend a portfolio’s life by close to a year.

This isn’t about exotic tactics. It’s about understanding three things: how each bucket is taxed, what the “conventional” order gets right and wrong, and why the smartest retirees stop thinking about which account and start thinking about which tax bracket. This guide walks through all three, with a calculator to map your own situation, and a dedicated section on how the federal TSP-pension-Social Security structure changes the math.

2. The three buckets and how each is taxed

Before you can sequence withdrawals, you need to understand how each type of account is taxed when money comes out. Almost every retiree’s savings fall into three buckets:

Taxable accounts hold money you’ve already paid income tax on. When you sell an investment, you owe tax only on the gain — and if you’ve held it more than a year, that gain is taxed at the favorable long-term capital gains rates of 0%, 15%, or 20%, which are usually lower than ordinary income rates. The return of your original principal isn’t taxed at all. Dividends and interest are taxed in the year received.

Tax-deferred accounts hold money that went in pre-tax. You got a deduction when you contributed, the money grew without annual taxation, and now every dollar that comes out is taxed as ordinary income — the same rates that apply to wages. These accounts are also subject to Required Minimum Distributions starting at age 73, which force money out whether you need it or not.

Tax-free (Roth) accounts hold money you contributed after paying tax. The trade-off: qualified withdrawals in retirement are completely tax-free, and Roth IRAs have no lifetime RMDs. As of 2024, Roth 401(k) and Roth TSP balances also escaped lifetime RMDs. This makes the Roth bucket the most flexible and most valuable to preserve.

The key insight: because each bucket is taxed differently, which bucket you draw from changes your taxable income for the year — and your taxable income drives not just your tax bill but your Social Security taxation and Medicare premiums too. For the full picture of how each federal retirement income source is taxed, see the federal retirement income taxation guide.

3. The conventional order

The traditional rule of thumb, taught for decades, is a simple sequence:

1. Taxable accounts first. Spend brokerage and bank money early. This lets your tax-advantaged accounts keep growing, and selling long-held investments often triggers only favorable capital gains rates (sometimes 0%).
2. Tax-deferred accounts second. Once taxable money is exhausted, draw from traditional 401(k)/IRA/TSP, paying ordinary income tax.
3. Roth accounts last. Preserve the tax-free bucket as long as possible, letting it grow untouched and remain available for late-retirement flexibility or heirs.

The logic is sound on its face. It defers taxes as long as possible, maximizes tax-advantaged growth, and matches the natural stages of retirement: flexible taxable money in the active early years, predictable tax-deferred income in the middle years, and the tax-free Roth cushion preserved for the unpredictable late years and estate planning.

For many retirees, especially those with modest balances, this conventional order is perfectly fine. It’s simple, it’s better than withdrawing randomly, and it won’t leave you broke.

Most retirees do not overpay taxes because they earned too much. They overpay because distributions happen in the wrong order, in the wrong year, or without a bracket target. The right answer is usually bracket-dependent and year-dependent — not a fixed rule you set once and forget.

4. Why the conventional order isn’t always right

The conventional “taxable, then tax-deferred, then Roth” sequence has a hidden flaw: it can create a tax time bomb in your 70s.

Here’s the problem. If you spend all your taxable money first and let your traditional 401(k)/IRA grow untouched, that tax-deferred balance keeps compounding — and so do the Required Minimum Distributions you’ll eventually be forced to take starting at age 73. By delaying tax-deferred withdrawals too long, you can hit what planners call the “RMD wall”: a sudden jump in forced taxable income in your 70s that pushes you into a higher bracket, makes more of your Social Security taxable, and triggers Medicare IRMAA surcharges.

Fidelity’s modeling illustrates this with a retiree named Joe: under the strict conventional approach, he pays little or no tax for the first seven years, then hits an abrupt “tax bump” of about $5,000 a year for eleven years once RMDs and tax-deferred withdrawals kick in. A smoother approach spreads that tax out and extends his portfolio’s life.

This is why the modern consensus has shifted toward two refinements of the conventional order:

The proportional approach. Instead of fully draining one bucket before touching the next, you withdraw from all three buckets each year in proportion to their balances. This smooths your taxable income across all of retirement rather than creating low-tax early years followed by high-tax later years. Fidelity found this extended one hypothetical portfolio from just under 23 years to almost 24 years — roughly a full extra year of retirement income from sequencing alone.

The dynamic approach. The most sophisticated method adjusts every year based on your tax bracket. In low-income years (often early retirement, before Social Security and RMDs begin), you deliberately pull more from tax-deferred accounts — or convert them to Roth — to “fill up” your lower tax brackets. In high-income years, you lean on Roth withdrawals to avoid stacking income on top of an already-full bracket.

The common thread: stop draining buckets in a fixed order and start managing your taxable income to a target every year.

5. The bracket-filling strategy

The most powerful idea in retirement withdrawal planning is to stop thinking about which account and start thinking about which tax bracket you want to fill.

Here’s the core move. Each year you have a target: fill your lower tax brackets with ordinary income, but stop before spilling into a higher bracket. The 2026 numbers make this concrete:

The strategy works like this in a low-income year (say, you’ve retired at 63 and haven’t started Social Security or RMDs):

1. Calculate the room in your 12% bracket. For a married couple in 2026, the 12% bracket tops out at $100,800 of taxable income. Subtract your standard deduction (about $35,500 with the age add-on) and any income you already have (pension, interest), and the remainder is your “fill” capacity.
2. Fill it with tax-deferred withdrawals or Roth conversions. Pull from your traditional 401(k)/IRA — or convert it to Roth — up to the top of the 12% bracket. You pay tax now at 12% instead of risking 22% or higher later when RMDs force the money out.
3. Harvest capital gains at 0%. In the same low-income year, you can sell appreciated taxable investments and pay 0% on long-term gains, as long as your total taxable income stays under the 0% capital gains ceiling (about $98,900 for a couple in 2026).

This bracket-filling approach — paying controlled tax now at low rates to avoid forced tax later at high rates — is the single highest-value withdrawal strategy available to most retirees. It directly shrinks the future RMD wall while taking advantage of the lowest-rate years you’ll ever have. For the conversion side of this strategy, see the Roth conversion window article.

6. Map your own withdrawal order

The calculator below lets you enter your three bucket balances, your spending need, and your other income, then shows how different sequencing choices affect your taxable income and your remaining bracket room for the year.

The calculator is an educational model using 2026 federal brackets only — it doesn’t account for state tax, the full Social Security taxation formula, or IRMAA, all of which a complete plan should include. Use it to see the bracket-filling concept in action, then pressure-test the specifics with a tax professional.

7. How withdrawals ripple into Social Security and Medicare

The reason withdrawal order matters so much is that your withdrawals don’t just generate income tax — they raise your Adjusted Gross Income, and AGI is the trigger for two other expensive thresholds.

Social Security taxation. The portion of your Social Security benefits subject to federal tax depends on your “provisional income,” which rises with every dollar of tax-deferred withdrawal. A large traditional 401(k) withdrawal can push you from having 50% of your Social Security taxed to having the maximum 85% taxed. Roth withdrawals, by contrast, don’t count toward provisional income at all — which is exactly why preserving Roth flexibility is valuable in high-income years.

Medicare IRMAA surcharges. Medicare uses your Modified Adjusted Gross Income from two years prior to set your Part B and Part D premiums. In 2026, crossing $109,000 (single) or $218,000 (married filing jointly) triggers the Income-Related Monthly Adjustment Amount — a surcharge that can add over $1,000 per person per year. A poorly-timed large tax-deferred withdrawal or Roth conversion can trip this threshold and raise your Medicare premiums two years down the road. Roth withdrawals don’t count toward the IRMAA MAGI calculation. For the full IRMAA bracket structure, see the IRMAA surcharge article.

This is the deeper reason the bracket-filling strategy wins: by deliberately managing your taxable income each year, you’re not just minimizing income tax — you’re simultaneously controlling how much of your Social Security gets taxed and whether you trip the IRMAA cliff. The three problems are really one problem, solved by the same lever: managing AGI through withdrawal sequencing.

8. The federal employee version: TSP, pension, and Social Security

Federal retirees face a version of this problem with a specific twist: a large share of their income is not discretionary, which shrinks the room available for bracket-filling.

A federal retiree’s income stack typically includes the FERS pension (fully taxable ordinary income that arrives whether you want it or not), Social Security (partly taxable, also non-discretionary once claimed), Traditional TSP (the tax-deferred bucket, subject to RMDs at 73), Roth TSP (the tax-free bucket, no lifetime RMDs after 2024), and taxable savings for those who saved outside the TSP.

Here’s the key implication. Because the FERS pension and Social Security already fill up your lower brackets with non-discretionary income, federal retirees often have less room for bracket-filling withdrawals or Roth conversions than private-sector retirees with the same total wealth. A FERS retiree with a $40,000 pension and $24,000 of Social Security may already have $50,000+ of taxable income before touching the TSP — leaving a smaller window in the 12% bracket.

This makes the pre-Social-Security, pre-RMD window even more valuable for federal employees. A federal employee who retires at the Minimum Retirement Age (often 57) has a multi-year window before Social Security and RMDs begin — the lowest-income years they’ll ever have — to draw down or convert Traditional TSP at low rates. The mistake many federal retirees make is letting a large Traditional TSP balance ride untouched into their 70s, then getting hit with both the FERS pension and forced RMDs stacking into the 22% or 24% bracket.

The federal playbook, in order of priority:

1. Use the gap years (retirement to 73) to draw down or convert Traditional TSP while in lower brackets, before the pension-plus-Social-Security-plus-RMD stack fills them.
2. Preserve Roth TSP for high-income years and for heirs (it passes tax-free with no lifetime RMDs).
3. Coordinate the timing so a large conversion doesn’t accidentally trip the IRMAA threshold two years before a Medicare enrollment.

For the detailed federal tax mechanics, see the federal retirement income taxation guide, and for how much you actually need across all these sources, see the how-much-do-I-need cornerstone.

9. Five questions about retirement withdrawal order