Why Bucket Planning Beats Systematic Withdrawal for Most Retirees

Imagine you retired in late 2007 with $750,000 and a textbook plan: pull 4% a year, adjusted for inflation, and the math says you can spend $30,000 from the portfolio for the next 30 years. Eleven months later, the $750,000 is worth $420,000, and the plan still wants $2,500 a month — out of accounts that have lost more than 40% of their value. The pieces you’re selling cheap aren’t coming back without you holding the pieces you didn’t sell. That’s the moment when systematic withdrawal stops being a plan and starts being a hope.

Bucket planning was built to remove that specific moment from your retirement. Not because it earns more in the long run — it usually doesn’t — but because it changes which decision you have to make in a market like 2008, 2020, or any other sharp drawdown that lines up with the wrong year of your retirement.

This is the comparison most retirement content skips. The systematic withdrawal literature treats the portfolio as a single pool and a single percentage. Bucket planning treats it as a sequence of jobs, each with a different time horizon and a different appropriate asset. That distinction is the whole game.

What systematic withdrawal actually says

The most-cited version of systematic withdrawal comes from Bill Bengen’s 1994 study, which looked at rolling 30-year historical periods and asked one tight question: what’s the highest constant withdrawal rate that survived the worst of them? His answer — 4%, adjusted annually for inflation, from a 50/50 stock-bond portfolio — became the 4% rule that floats around every retirement article on the internet.

The math is real. The result is real. The problem is the framing.

Systematic withdrawal asks: what’s the maximum sustainable withdrawal rate from a balanced portfolio? It answers that question by treating the whole portfolio as one bucket and pulling proportionally each year — sell some of everything to make the check.

That’s a perfectly fine answer to a perfectly narrow question. The trouble is that the question doesn’t match how most retirees actually need to think about their money, and the implicit asset allocation doesn’t match how most retirees should actually be invested.

Where the model breaks for real people

Three things go wrong when you take the textbook systematic withdrawal rate and drop it into an actual retirement.

Sequence-of-returns risk hits the asset you can least afford to sell. When you sell shares proportionally from a 50/50 portfolio in a down market, you sell the stocks too. Those are the shares with the longest job to do. In a normal year, that’s just annoying. In a 2008-style year, it locks in losses on the part of the portfolio that was supposed to fund years 15 through 30 of your retirement. The research from Morningstar on sustainable withdrawal rates keeps surfacing the same point: the order of returns inside the first decade of retirement matters more than the average return across the whole 30 years.

The inflation-adjusted raise compounds in the wrong direction. Bengen’s 4% rule has you take the same purchasing power every year. In a year when the portfolio drops 25% and inflation runs at 4%, the rule says give yourself a raise from a smaller pile. The math eventually works out across the historical sample. The middle-of-the-distribution outcomes can look very different from the median.

The behavioral failure is what actually breaks the plan. This is the part the academic literature can’t capture. A retiree watching their portfolio drop while they keep selling into it gets nervous. Nervous retirees do one of two things — they cut spending in a panic (which they may or may not need to do), or they sell more out of fear right at the wrong time. Either way, the plan stops being the plan. Vanguard’s advisor-alpha research estimates that behavioral coaching alone — talking clients out of panic moves — adds roughly 1.5% in annualized value to outcomes. That’s not a small number, and it’s almost entirely about not blinking in the bad years.

How bucket planning answers the same question differently

Bucket planning starts from a different premise. Instead of asking what rate can I pull from one pool, it asks which pool should I pull from for which purpose, in which order, over which horizon. Mechanically, the framework I use looks like this:

The Now bucket holds one to two years of essential expenses in cash and short-duration instruments. This is the bucket you actually withdraw from to pay the bills. The Soon bucket holds five to ten years of essential income coverage — Social Security, pensions, and income-focused Fixed Index Annuities — used to refill the Now bucket and cover the guaranteed-income floor. Sizing the Soon bucket is where most of the planning work happens. The Later bucket is the growth allocation, invested for the ten-to-thirty-year horizon, and untouched in any year where the market is materially down.

When 2008 happens to a bucket-planned retiree, the Now bucket pays the grocery bill out of the cash already set aside. The Soon bucket’s guaranteed sources keep delivering the income they were designed to deliver. The Later bucket sits through the drawdown without being sold. There is no decision to be made under stress, because the decision was already made when the buckets were built.

That’s the unlock. Bucket planning doesn’t promise a higher return — over a typical 30-year retirement, a globally diversified 60/40 portfolio with a disciplined systematic withdrawal will probably end with more money than a bucketed approach with a guaranteed-income floor. What bucket planning promises is that you won’t be the retiree who panic-sold in March 2009 because the model didn’t have an answer for what to do that month.

A hypothetical comparison — Patricia at 64

Consider a hypothetical case: Patricia, 64, just retired from her job as an instructional designer in suburban Charlotte. She has $650,000 in a rollover IRA, expects $2,800 a month from Social Security if she claims at her full retirement age of 67, and needs $5,000 a month in essential expenses to keep the lights on, the property tax paid, and basic medical coverage going.

Path A — pure systematic withdrawal. Patricia invests the $650,000 in a 60/40 portfolio, pulls 4% the first year ($26,000), and adjusts for inflation each year thereafter. From 64 to 67, she’s pulling roughly $2,167 a month from the portfolio, and her Social Security is paying nothing yet. From 67 forward, she adds $2,800 a month from Social Security to her income, but the systematic withdrawal continues uninterrupted alongside it.

If the market is calm in years one through five, this works fine. If the market drops 30% in years two and three, she’s selling stocks at depressed prices while inflation pushes her required withdrawal up — and she still has 25-plus years of retirement ahead of her.

Path B — bucket planning. Patricia carves out $120,000 into the Now bucket (about 24 months of essential expenses), commits another portion of the IRA to building a Soon bucket income floor through a combination of an income-focused Fixed Index Annuity and a deliberate Social Security claiming strategy at 67, and invests the remaining balance in the Later bucket for growth. From 64 to 67, the Now bucket pays the bills. The Soon bucket structure means that at 67, Social Security plus the FIA income rider covers the $5,000-a-month essential floor without touching the Later bucket. The Later bucket can ride through whatever the market does in years two through five because she doesn’t need it for income yet.

The two paths don’t generate the same long-term portfolio value. Path A might end with a larger ending balance in a benign return environment. Path B trades some of that upside for the structural certainty that essential expenses will always be paid out of an account that wasn’t required to sell stocks at a loss to fund them.

Thomas’ Take: The retiree who sleeps well at night makes better long-term investment decisions than the one who’s checking the S&P 500 every Tuesday. Bucket planning isn’t about maximizing the math. It’s about removing the panic decision from the worst year of your retirement. That’s a feature, not a bug.

Where systematic withdrawal still makes sense

I’m not arguing systematic withdrawal is wrong. I’m arguing it’s incomplete for most retirees.

There are retirees for whom a clean systematic withdrawal is the right framework: someone with a defined-benefit pension that already covers essential expenses, someone with rental income or other guaranteed cashflow that handles the floor, someone with a portfolio so large that the percentage being pulled is well below 3% and sequence risk is structurally limited. For those situations, the whole portfolio can sit in a growth-tilted allocation and a constant withdrawal rate works fine.

It also matters how you build the Later bucket. The growth allocation inside a bucket plan and the growth tilt inside a 60/40 systematic withdrawal plan can look very similar from the inside. The difference isn’t the investments — it’s the architecture around them. The question systematic withdrawal answers (what’s a safe pull rate from a balanced pool) is real. The question bucket planning answers (which dollar should pay which expense in which year) is bigger.

What this looks like in practice

If you’re already retired or within five years of retirement, the practical move isn’t to throw out one model and adopt the other. It’s to map the essential expenses you actually have to the guaranteed income sources you actually have, and figure out what the gap is. The gap is what bucket planning is designed to fill.

For a tighter walkthrough of how the framework comes together, the Now / Soon / Later overview is the right next stop, and the Soon bucket sizing piece is where the income-floor math gets done.

Systematic withdrawal will keep showing up in every retirement calculator and every advisor’s slide deck. That’s fine. Just don’t mistake it for a plan that thinks about the part of retirement that actually breaks people — the bad year. That part of retirement is the only part a plan really needs to plan for.

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This article is published by Confluence Media Group LLC, an independent publisher of educational financial content. Thomas Clark is a Series 65 Investment Advisor Representative. The information provided is for educational and informational purposes only and is not personalized financial, tax, or legal advice. Past performance does not guarantee future results. All investing involves risk, including potential loss of principal. Consult a qualified professional before making financial decisions.

Confluence Media Group LLC is a separate entity from Confluence Capital Management, the investment advisory practice through which Thomas Clark provides advisory services. Advisory services are not offered through this publishing platform.

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About Thomas Clark

Thomas Clark is the founder of Confluence Media Group LLC and a Series 65 Investment Advisor Representative. He has spent nearly two decades working with families on retirement planning, with a focus on Social Security optimization, retirement income coordination, and the bucket planning approach to building a guaranteed income floor.

Thomas writes and publishes at thomasclarkadvisor.com and is the author of The Just in Case Binder — a 148-page printable family financial organizer for households who want to make sure the people they love know where everything is.

He lives in North Carolina with his family.

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