A plain-English retirement withdrawal plan

Which account to spend first, why the textbook order is often wrong, and how guardrails beat a rigid withdrawal rate.

Saving for retirement gets all the attention; spending it is the part nobody explains plainly. A withdrawal plan is just a set of rules for turning a portfolio into a monthly paycheck without running out — and the rules that matter are about order and flexibility, not about finding the perfect percentage. This spoke sits under the Decision tools hub.

Step 1: a cash buffer

Hold one to three years of spending in cash or short-term bonds. Its job is not return. Its job is to make selling stocks in a downturn optional — the core defence against sequence-of-returns risk, where the order your returns arrive in decides whether identical average returns leave you rich or broke. You refill the buffer from the portfolio in good years.

Be honest about what it costs. Cash earns cash yields, not portfolio returns, so every year that slice sits out of the market you give up the difference. That is real money and it compounds. But size it: if your portfolio is around 25× your annual spending, then three years of spending is roughly 12% of the portfolio, and one year is about 4%. The drag on the whole plan is the return gap applied to that slice — noticeable, not ruinous.

And be honest about what it buys, because it is easy to oversell. A cash buffer does not conjure returns out of nowhere, and a rebalanced portfolio does something similar mechanically: after stocks fall, rebalancing means you are selling bonds, not stocks. The buffer's real value is that it makes the right behaviour possible for a human being. The retiree who has to log in and sell equities during a 35% drawdown to eat is the retiree who capitulates. The one with two years of groceries in cash can wait. That is not a small thing — it is most of what kills plans — but it is a behavioural benefit, not an arithmetic one, and you should buy it knowingly.

Step 2: which account do you spend first?

You have up to three kinds of money and they are taxed completely differently on the way out. The order you tap them in decides how much of your own money you keep.

The third column is the one most withdrawal guides never print, and before 65 it is worth more than the second.

The textbook order, and why it is often wrong

The default advice is: taxable → tax-deferred → Roth. Spend the already-taxed money first, let the tax-deferred account keep compounding, and leave the Roth to grow tax-free as long as possible.

It is a defensible starting point. It is also frequently the wrong plan, because it optimises one year at a time and your tax bill is a lifetime number. Follow it strictly and you produce a lumpy income profile: several years of near-zero taxable income while you live off the brokerage account, and then a cliff-edge of high income when the taxable money runs out and RMDs arrive on top of Social Security. You wasted the low brackets in the early years and then paid the high ones later.

Bracket-smoothing beats strict sequencing. The better instinct is to ask, every year: what is the cheapest dollar available to me right now, and how much of it can I take before it stops being cheap? Usually that means drawing a blend — enough from the tax-deferred account to fill up a low bracket deliberately, topped up from taxable or Roth for the spending above it. You pay a little tax in years you could have paid none, and you avoid paying a lot in years when you would otherwise have had no choice.

The rule of thumb that survives: sequence the accounts loosely, and manage the bracket tightly. Roth still goes last in the sense that it is the money you most want to leave alone — but "last" means last in priority, not untouched. A Roth withdrawal is the only lever you have that adds spending without adding a single dollar of income, which makes it the perfect thing to top up with in a year when one more dollar of MAGI would be expensive.

Step 3: guardrails, not a rigid percentage

The 4% rule assumes you take the same inflation-adjusted amount every year regardless of what markets do. No real retiree behaves that way, and the assumption is expensive: the "safe" rate is essentially the price of promising never to adjust.

Guardrails price the alternative. The best-known version comes from Guyton and Klinger's 2006 decision-rules paper, and the mechanics are simple:

With rules like these attached, the paper reported sustainable initial rates of 5.2–5.6% for portfolios of at least 65% equities over a 40-year horizon. Treat that number carefully. It is not comparable to Morningstar's 3.9%, which is a forward-looking figure for someone who refuses to adjust at all; the two describe different retirees making different promises. The point is not the headline rate — it is the direction of the trade. You accept an income that moves in exchange for a much smaller chance of running out.

The honest summary of the entire withdrawal-rate literature: flexibility is worth more than precision in the rate. A retiree who can absorb a 10% spending cut for a couple of years after a bad market has bought more safety than one who agonised between 3.9% and 4.1%. Decide in advance which parts of your budget are the flexible parts — that decision is the plan. The sequence-risk stress test shows why: it runs identical returns in two orders, and the gap between the outcomes is what your flexibility is really being paid to close.

Step 4: the tax layer

Everything above decides how much you take out. This decides how much you keep.

Fill a bracket on purpose

In the years between stopping work and starting Social Security or RMDs, you are the only person choosing your taxable income. That is the whole opportunity, and it does not come back.

The 12% bracket runs to $50,400 of taxable income for a single filer and $100,800 for a couple filing jointly. Deliberately realising income up to that ceiling — a traditional withdrawal you did not strictly need, or a Roth conversion — takes the cheapest dollars that will ever be available to you. Leaving the bracket unfilled does not save that room for later; it expires.

The 0% capital gains bracket

Separately, long-term capital gains are taxed at 0% while taxable income stays below $49,450 (single) or $98,900 (married filing jointly). Not a low rate — zero. A retiree with a low-income year and a brokerage account holding appreciated shares can sell them, pay nothing, and buy them straight back at the new higher cost basis. There is no wash-sale rule on gains.

The catch is that these two moves compete for the same space. Ordinary income — a conversion, a traditional withdrawal — stacks underneath capital gains and pushes them up out of the 0% band. You can fill the bracket with ordinary income or harvest gains at zero. Rarely both, at full size, in the same year.

Before 65: the ACA cliff sits above the tax bracket

If you are buying health insurance on the marketplace, the binding constraint usually is not your tax bracket at all. The enhanced premium tax credits expired at the end of 2025, so household MAGI one dollar over 400% of the poverty line — $62,600 single, $84,600 for a couple — forfeits the entire premium tax credit. Against a benchmark silver premium of roughly $15,914 a year for a 60-year-old, that dwarfs any bracket-filling saving.

So before 65, the order of operations inverts: find the cliff first, and then see how much bracket-filling fits underneath it. Check where you land with the ACA bridge tool, and read the ACA subsidy cliff is back.

From 63: Medicare is already watching

Medicare's income-related surcharge is set from your income 2 years earlier. So a big withdrawal or conversion in the year you turn 63 shows up as a higher Part B and Part D premium at 65. Cross the first tier — $109,000 single, $218,000 joint — and it costs about $1,148 for the year, per person on Medicare. It is a cliff, not a ramp: one dollar over triggers the whole tier. The conversion cost checker prices tax, ACA and IRMAA in one place.

When RMDs actually start — it is probably not 73

SECURE 2.0 did not set one RMD age. It set two, and almost everyone reading this is in the later group:

If you were born in 1960 or later, you have two more years of RMD-free runway than the number most articles quote. That is not trivia — it is two extra years in which you control your own taxable income, which is exactly the window a Roth conversion plan gets built in. Source: IRS RMD FAQs.

The RMD is not a flat percentage, either. It is the prior-year balance divided by a life-expectancy factor that shrinks every year, so the forced withdrawal grows as a share of the account for as long as you live — which is what eventually drags Social Security into tax and lifts your Medicare premium. The RMD planner projects yours.

Two things blunt an RMD once it arrives:

• Qualified charitable distributions. From age 70½ you can send up to $111,000 a year straight from an IRA to a charity. It satisfies the RMD and never appears in your income — which means it also never lifts your Medicare IRMAA or your ACA MAGI. A charitable retiree who instead takes the RMD and donates the cash gets a far worse result.
• Converting early. Every dollar moved to Roth before RMDs start is a dollar that never generates a forced distribution, for the rest of your life.

Key takeaways

• Hold one to three years of spending in cash so you never have to sell stocks low. Know that you are buying behaviour, not return.
• Rough order: taxable → tax-deferred → Roth. But manage the bracket, not the sequence — emptying one account at a time wastes low-tax years and creates high-tax ones.
• Roth withdrawals do not raise MAGI. Before 65 that is worth more than the income-tax saving.
• Use guardrails instead of a rigid inflation-adjusted withdrawal. Flexibility is worth more than precision in the rate.
• RMDs start at 73 if you were born 1951–1959, and 75 if you were born in 1960 or later.

Educational only — not financial or tax advice.