A recent Barron's article on retirement tax strategy, circulated this week, opens from a specific premise: a retiree with more saved than they will ever spend, deciding what to leave and how to leave it. The advice that follows is the standard playbook in its sharpest form. Spend down the tax-deferred accounts first. Leave the Roth untouched. Let the taxable brokerage pass through the estate, because the step-up in basis at death erases the capital gains tax on a lifetime of appreciation. The author, William Bernstein, warns that money left in tax-deferred accounts can produce what he calls "monster tax bills" for high-earning heirs.
The advice is sound, as far as it goes, and it is worth being precise about what it is optimizing. The person who reads the article is the retiree. The person whose tax bill the strategy is built to minimize is the heir. Those are not the same person, and the costs and benefits of the strategy are not charged to the same account. Before following the playbook, the retiree should know whose plan it is.
The tax facts the strategy rests on
The mechanics are real and worth stating plainly, because they explain why the playbook exists. A traditional IRA or 401(k) inherited by an adult child gets no step-up in basis. It is income in respect of a decedent: every dollar withdrawn is taxed as ordinary income at the heir's marginal rate, on top of the heir's salary. Under the SECURE Act's 10-year rule, most non-spouse heirs must empty the account by the end of the tenth year after death, with annual required minimum distributions along the way if the original owner had already begun taking them. A Roth, by contrast, passes with distributions tax-free, provided the five-year holding rule is met. And a taxable brokerage account gets the step-up: the cost basis resets to the value at the date of death, and a lifetime of appreciation is, for capital gains purposes, simply gone.
The magnitude is not hypothetical. One worked example, published by Yahoo Finance, walks through a $750,000 inherited 401(k). Taken as a lump sum, it can push an heir into the 37 percent bracket, trigger Medicare surcharges, make 85 percent of the heir's Social Security taxable, and eliminate the 0 percent capital gains rate on the heir's other investments. Spread evenly over ten years, the same account costs roughly $120,000 less in federal tax. Facing numbers like that, the advice to get assets out of the tax-deferred wrapper, one way or another, is not cleverness. It is arithmetic.
The 2026 rate schedule adds one more layer, because it is built as a staircase rather than a slope. For 2026, long-term gains are taxed at zero for taxable income up to $49,450 for single filers and $98,900 for married couples, then at 15 percent up to $545,500 and $613,700 respectively, then at 20 percent above that, with the standard deduction of $16,100 or $32,200 taken off the top of income before the brackets apply. The zero bracket is the retiree's quiet planning window: a couple with room under $98,900 of taxable income can realize gains at a zero rate, resetting basis for free. The staircase shape is the whole reason the heir-optimizing playbook and the retiree-optimizing plan diverge, because the retiree's own window is wide open at exactly the income levels the playbook spends its energy routing around.
Who pays, and who receives
The strategy has a distribution of costs and benefits, and it is asymmetric. The heir receives nearly all of the benefit: the stepped-up brokerage, the tax-free Roth, the avoided inherited-IRA tax bomb. The retiree pays the costs, and they are less visible because they are mostly costs of flexibility rather than cash.
The Roth is the most flexible account a retiree owns. It is the one bucket with no required distributions, no tax on withdrawals, and no effect on Social Security taxation or Medicare premiums when tapped. Instructing a retiree to leave the Roth untouched for heirs means instructing them to forgo the use of their best tool for handling their own surprises: a long-term care bill, a market drawdown, an unexpected decade. The strategy asks the retiree to hold the best account in reserve for someone else, which is rational from the family's point of view and genuinely costly from the retiree's.
The spending order carries a similar charge. Spending the tax-deferred account first means realizing ordinary income in the retiree's own lifetime, often at a higher rate than the capital gains that spending the brokerage would have triggered. The family optimum and the retiree's optimum are not the same point on the map. The playbook moves the retiree toward the family optimum and pays for the move out of the retiree's own flexibility.
The strategy's payoff depends on a future nobody has seen
There is a deeper issue, which is that the playbook pays its benefits in only one branch of the future. The step-up is realized only if the brokerage account actually passes through the estate. The Roth's tax-free status for heirs matters only if the Roth survives unspent. The entire strategy is a bet that the retiree will not need the assets being preserved, and the bet is being placed with the retiree's own safety margin.
Consider the retiree who follows the sequence: spends the tax-deferred account first, paying ordinary income on every withdrawal, then develops a need that outruns the plan, a long-term care stay of the kind that costs six figures a year. The assets preserved for heirs get spent after all, but the step-up no longer does its work, because assets sold before death get no step-up, and the ordinary income realized early in the sequence bought nothing for anyone. The strategy that looked like free tax planning was a wager on the retiree's own trajectory, and the retiree held the losing side.
None of this makes the advice wrong. For the retiree the article actually addresses, the one with a genuine surplus and the ordinary desire to leave it well, optimizing for heirs is rational, generous, and often cheap. The 10-year rule is a real tax on unprepared estates, and the playbook is the correct response to it. The point is narrower. The advice is written to the saver and aimed at the beneficiary, and the saver who does not notice the difference will optimize the wrong person's life. A plan that is excellent for the estate can be merely tolerable for the estate's owner, and the owner is the one living inside it.
The advice is also a bet on the heirs' circumstances
There is a second hidden assumption, which is that the heir's tax situation is known, and it is rarely known in the year the decisions are made. The 10-year rule means an heir must empty an inherited account over a decade of their own earnings, and the tax bill depends on where those earnings fall: an heir in a low bracket can absorb an inherited 401(k) cheaply, while a high-earning heir faces the enormous tax bills the strategy is built to avoid. A retiree who optimizes for a child's imagined bracket is planning around a variable that will not be observed until the estate is open. The playbook's direction, tax-deferred first and Roth last, is robust to that uncertainty in most cases, which is why it is standard advice. But the magnitude of the benefit is entirely hostage to it.
The charitable option deserves a sentence of its own, because it is the playbook's escape hatch and it benefits no heir at all. Assets left to charity owe no tax, whatever the account type, and a retiree who is indifferent between children and causes can route the tax problem into a gift. That is not an argument for charity over family. It is a reminder that the entire tax drama of the inheritance plan exists only because the beneficiary is a person, and the person's circumstances are the variable the strategy cannot price.
The check a reader should run first
The practical test is simple and runs in the other direction. Before deciding which accounts to spend and which to preserve, estimate the two tax bills separately: the retiree's own lifetime tax under each spending order, and the heir's tax under each inheritance mix. The playbook minimizes the second number and only sometimes the first. A retiree whose tax-deferred balance is modest, whose Roth is needed as a shock absorber, or whose heirs are in low brackets anyway may find that the best family plan is a different one entirely: spend the Roth when it helps, spend the brokerage when the gains are cheap, and let the tax-deferred account pass with a beneficiary who will stretch it over ten years.
The Barron's piece is a good answer to a real question. The question it answers is "how should the next generation be taxed," and it answers it well. The retiree reading it should keep one fact in view: the person being optimized is standing somewhere else. There is nothing wrong with planning for heirs. The error is only in confusing a plan for the estate with a plan for the retirement, and then living as if the two were the same thing.
Primary sources
- The syndicated Barron's article for the framing of the strategy, the spend-tax-deferred-first sequence, the step-up treatment of brokerage assets, and the Bernstein comment.
- The Yahoo Finance analysis of a $750,000 inherited 401(k) for the 10-year rule mechanics, the ordinary income treatment of inherited retirement accounts, the step-up contrast, and the $120,000 tax comparison.
- CNBC's 2026 capital gains bracket report for the current bracket thresholds and standard deduction figures.