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Planning · Wealth Transfer & TaxResearch Note · April 2026 · 9 min read

The Withdrawal Order That Saves Six Figures.

Two retirees with the exact same $2 million portfolio can pay $150,000 more or less in lifetime taxes purely based on which bucket they draw from first. The conventional wisdom is wrong.

By Sean Anees Saifi, Financial Advisor · Capital Wealth · Sources: Kitces, Wade Pfau, Morningstar Tax Lab
3–5 yrs
Portfolio Life Extension
$150K
Typical Lifetime Tax Savings
73
RMD Start Age (2026)
25%
RMD Penalty If Missed

The Three Buckets

Taxable

Brokerage, savings, CDs. Capital gains taxed at 0/15/20%. No RMDs. Step-up basis at death.

Tax-Deferred

Traditional IRA, 401(k), 403(b). Ordinary income tax on every dollar out. RMDs start at 73 (75 for those born ≥1960).

Tax-Free

Roth IRA, Roth 401(k), HSA (medical). Zero tax on qualified withdrawals. No RMDs on Roth IRAs.

The Four Boxes — How Every Account Is Taxed

Before you decide the order to draw from, you need to know how each account is taxed at three points: when you put money in, while it grows, and when you take it out. Every retirement vehicle in America fits into one of these four boxes. Most people don't realize they're paying tax three times on Box 1 money — contribution, every year of interest, and the spread on any capital gains — while Box 4 money never gets taxed again after the initial contribution.

Taxable Now, Taxable Later

  • In: after-tax contributions
  • Grow: interest taxed yearly
  • Out: principal non-taxable
What's in this boxBank accounts · CDs · Money market · Most bond funds · Government securities · Treasury bonds
1

The Goal: Never Taxed Again

  • In: after-tax contributions
  • Grow: tax-free
  • Out: tax-free (if qualified)
What's in this boxRoth IRA · Designated Roth 401(k) · Municipal bonds · Cash-value life insurance (qualified withdrawals & loans) · 529 plans · Coverdell · HSA (medical)
4

Deferred Growth, Taxed Later

  • In: after-tax contributions
  • Grow: tax-deferred
  • Out: gains taxed as ordinary income
What's in this boxFixed & variable annuities · Non-deductible IRAs · Non-deductible excess 401(k) · U.S. Savings Bonds (EE/I)
2

The Big Deferral (IRS's Favorite)

  • In: pre-tax contributions
  • Grow: tax-deferred
  • Out: every dollar taxable as ordinary income
What's in this box401(k) · 403(b) · Pension plans · Profit-sharing · SEP-IRA · SIMPLE IRA · Deductible Traditional IRA · Keogh
3

Direct real estate, common stocks, and some mutual funds are hybrid — a portion of their gains may qualify for the lower long-term capital gains rate rather than ordinary-income treatment.

Hypothetical Illustration — the Compounding Cost of Each Box

What $10,000 a year actually becomes after 30 years, comparing all four tax boxes at a hypothetical 6% return and 28% tax bracket. Numbers are end-of-year values; the After-Tax Income column assumes you stop contributing and start drawing at 6% of the account balance.

Contribution$10,000/yr Return6% Tax bracket28% Distribution rate6%

Box 1 — Taxable

Bank · CD · Brokerage Interest
1
YearAccount ValueAfter-Tax Income
1$7,511
5$40,943$1,769
10$91,528$3,954
15$154,025$6,654
20$231,239$9,990
25$326,635$14,111
30$444,497$19,202
Yr 30 Balance
$444,497
Lump Sum After Tax
$444,497

Box 4 — Never Taxed Again

Roth IRA · Roth 401k · Cash-Value Life
4
YearAccount ValueAfter-Tax Income
1$7,632
5$43,022$2,581
10$100,596$6,036
15$177,642$10,659
20$280,748$16,845
25$418,726$25,124
30$603,372$36,202
Yr 30 Balance
$603,372
Lump Sum After Tax
$603,372

Box 2 — Deferred, Taxed Later

Annuities · Non-Deductible IRA · Savings Bonds
2
YearAccount ValueAfter-Tax Income
1$7,632
5$43,022$1,859
10$100,596$4,346
15$177,642$7,674
20$280,748$12,128
25$418,726$18,089
30$603,372$26,066
Yr 30 Balance
$603,372
Lump Sum After Tax
$494,908

Box 3 — Pre-Tax Deferral

401k · 403b · Pension · Deductible IRA
3
YearAccount ValueAfter-Tax Income
1$10,600
5$59,753$2,581
10$139,716$6,036
15$246,725$10,659
20$389,927$16,845
25$581,564$25,124
30$838,017$36,202
Yr 30 Balance
$838,017
Lump Sum After Tax
$603,372

Hypothetical only. Does not reflect the performance of any specific investment, insurance contract, or financial product. Box 3 shows the highest lump-sum account value because pre-tax contributions let more money compound, but once you apply 28% income tax on distribution, the net after-tax lump sum converges to Box 4. Lower capital-gains rates would narrow Box 1's disadvantage; changes in tax brackets over your lifetime can shift these comparisons meaningfully — which is exactly why the withdrawal-order decisions below matter so much.

The Takeaway Over 30 years of $10K/yr at 6%, the gap between Box 1 (fully taxable) and Box 4 (never taxed again) is $158,875 — on the same contributions and the same returns. That's not investment skill; that's tax structure. Which box your next dollar lands in matters as much as what it's invested in.

The Old Rule (Now Outdated)

Decades of planning guides said: Taxable first, Traditional second, Roth last. The logic: let tax-advantaged accounts keep compounding. Sounds right — but creates a ticking tax bomb.

"The problem with spending taxable first is that at age 73 the RMDs on your untouched Traditional IRA balloon into the highest brackets — exactly when you can't avoid them."

The Smarter Rule: "Fill the Bracket"

Between ages 62–72, when most retirees are in a low bracket (often 12% or 22% after standard deduction), intentionally draw from the Traditional IRA to fill up the lower brackets each year. This shrinks future RMDs and prevents being forced into 32%+ territory later.

Worked Example

ScenarioOld Rule (Tax Last)New Rule (Fill Bracket)
Age 65 income$80K from brokerage (low tax)$80K mix: $40K IRA + $40K brokerage
Age 73 RMD amount$95,000 (huge tax)$52,000 (manageable)
Marginal bracket at 7532%22%
Lifetime taxes paid$520,000$375,000
Savings$145,000

RMD Basics (2026 rules)

Uniform Lifetime Table (Key Ages)

AgeFactorAgeFactorAgeFactor
7326.58020.28714.4
7425.58119.48813.7
7524.68218.58912.9
7623.78317.79012.2
7722.98416.89210.8
7822.08516.0958.9
7921.18615.21006.4

Roth Conversions: The Secret Weapon

Between ages 62–72 — after you stop working but before RMDs force you — you have a 10-year window to convert Traditional IRA dollars to Roth at low tax brackets. Pay the tax now, avoid the bigger bill later, and leave tax-free money to your heirs.

Optimal window: from the year after you retire through the year before RMDs start. Convert enough each year to fill the 12% and 22% brackets without spilling into 24%.

2026 Tax Brackets (MFJ)
BracketMarried Filing Jointly Income
10%$0 – $23,850
12%$23,850 – $96,950
22%$96,950 – $206,700
24%$206,700 – $394,600
32%$394,600 – $501,050

Qualified Charitable Distributions (QCDs)

If you're 70½+, you can send up to $108,000/year (2026 limit) directly from IRA to charity. Counts toward your RMD but doesn't show on your AGI — reducing Medicare IRMAA surcharges, Social Security taxability, and state income tax in one move.

Get a multi-decade tax map.

We build a year-by-year withdrawal plan from 62 to 95 showing tax owed, RMD, bracket, and Roth conversion opportunities. Most clients save 5–8% of lifetime taxes just from re-sequencing.