Picture a retiree who has saved $1 million and is told by a magazine, a podcast, or a well-meaning friend that “the 4% rule” means she can spend $40,000 a year and never run out. Picture another retiree, with the same $1 million, a much shorter list of essential expenses, and a Social Security benefit that already covers most of them. Same number on paper. Two completely different retirements. Same advice from the magazine.
The 4% rule is one of the most-cited shortcuts in personal finance. It is also one of the most-misunderstood. Used correctly, it answers a narrow question, and the answer is genuinely useful. Used the way most people use it — as a personal spending plan — it can quietly take a workable retirement and make it worse.
What the 4% Rule actually says
The rule comes from a 1994 study by financial planner William Bengen. He looked at historical U.S. market returns and asked a specific question: across every rolling 30-year retirement window since 1926, what is the highest fixed inflation-adjusted withdrawal rate that would have survived the worst of those windows from a 50/50 stock-bond portfolio? The answer was approximately 4%.
That is the entire claim. It is a backward-looking historical floor, calibrated to one country’s data, one asset mix, one withdrawal pattern (constant inflation-adjusted), and one retirement length (30 years). It is a research finding about portfolio survivability. It is not a personal financial plan, and it is not a forecast.
The rule does two useful things. It anchors the conversation in a specific number, which helps when retirees first sit down to do the math. And it pushed back on the once-common assumption that you could safely spend 6% or 7% of a portfolio without consequence. Both of those contributions matter.
What the 4% Rule does not say
The rule does not say you will earn 4% returns. It does not say markets will repeat. It does not say your expenses will rise smoothly with inflation in lockstep with the index. It says nothing about taxes. It treats retirement as a single 30-year window where you draw from one undifferentiated portfolio, and where every dollar is interchangeable.
Real retirements look very little like that. Expenses are lumpy. Healthcare spikes around 65 and 80. Housing is paid off by some, refinanced by others, and downsized by others again. Social Security, depending on when you claim, can cover anywhere from a quarter of essential expenses to nearly all of them. Pensions are in the picture for some retirees and absent for others. Account types matter: a $100,000 withdrawal from a Roth costs zero in tax, the same withdrawal from a traditional IRA can cost $20,000 or more depending on bracket. The rule abstracts all of that away.
It also abstracts away the variable that actually decides whether a retirement feels safe: the gap between essential expenses and guaranteed income. A 4% withdrawal supporting groceries and electricity feels very different from a 4% withdrawal funding travel and gifts. The rule treats those identically. The lived experience does not.
Thomas’s Take: A rule that treats your grocery money and your travel money the same way is a rule that’s quietly setting you up to behave badly during a bear market. The first job of a retirement plan isn’t to hit a withdrawal number. It’s to make sure the necessary stuff is paid for in a way that doesn’t ride on the S&P 500.
Sequence of returns is the real story
The deeper problem with using the 4% rule as a personal plan is that it papers over sequence-of-returns risk — and sequence risk is the thing that decides whether a retirement actually works.
Two retirees both earn an average 7% return over 30 years. One gets a great first decade and a rough second. The other gets a rough first decade and a great second. With no withdrawals, they end with the same amount of money. With a 4% withdrawal taken every year through the rough decade, the second retiree can run out of money even though her average return matches the first’s exactly.
The reason is mechanical. When a portfolio is being drawn down, every dollar withdrawn during a downturn is a dollar that can’t recover when the market recovers. The bigger the early drawdown, the smaller the base that gets to participate in the next rally. Retirees who entered retirement around 2000 and held to a strict 4% rule felt this firsthand — the dot-com unwind and the 2008 financial crisis chewed through portfolio after portfolio in the first decade.
The 4% rule technically survived the historical worst case. The people inside that worst case did not enjoy it. Many of them dialed back, sold at the bottom, or quietly went back to work. The math survived. The plan didn’t.
What to use instead
The alternative isn’t a different number. It’s a different structure.
Consider a hypothetical couple, Frank and Susan, both 66. Their essential monthly expenses — housing, food, healthcare premiums, insurance, transportation — come to $5,800. Frank’s Social Security at 66 is $2,800. Susan’s is $1,900. That’s $4,700 a month of guaranteed, inflation-adjusted income. Their gap is $1,100 a month, or $13,200 a year.
A blunt 4% reading of their $700,000 portfolio would say they can spend $28,000 a year. That number doesn’t connect to their actual life. The bucket-planning reading asks a different question: how do we cover the $13,200 essential gap in a way that doesn’t depend on the market, and let the portfolio focus on the rest?
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Get Your Free CopyThe Soon bucket is built to do exactly that job. A fixed-indexed annuity with a guaranteed lifetime income rider can be sized to close the $1,100 monthly gap for both lives, locking the income floor in place. With the floor handled, the Later bucket — the market-exposed growth portion — exists for travel, grandchildren, the kitchen renovation, and legacy. That portfolio can ride a bear market without forcing Frank and Susan to sell anything they need to live on. A 6% drawdown year is uncomfortable, not destabilizing, because nothing essential depends on it.
This is the core difference. The 4% rule asks how much one undifferentiated pool can sustainably produce. Bucket planning asks how the pool gets layered against actual expenses and actual guaranteed income, so the right portion is asked to do the right job.
Thomas’s Take: I’ve found that the single greatest predictor of retirement happiness isn’t the size of the portfolio or the withdrawal rate — it’s the gap between essential expenses and guaranteed income. Close that gap, and almost every other financial decision in retirement quietly gets easier.
Where the 4% Rule still earns its keep
The rule isn’t useless. It’s a sanity check. If a 60-year-old is looking at a $400,000 portfolio, no Social Security yet, no pension, no income floor, and a target lifestyle that requires $80,000 a year of withdrawals, the 4% rule is the calculator that says this plan does not work. That’s a valuable thing for a rule of thumb to do.
It’s also a reasonable starting point for a younger saver thinking about how much capital is enough. “Multiply your target spending by 25” is a simple, memorable benchmark for the accumulation phase. It loses its grip the moment the conversation turns from how much do I need to how do I actually pay myself in retirement.
The better question
The 4% rule is a useful research finding asked to do a job it was never designed to do. As a general portfolio-survivability heuristic, it earned its place. As a personal retirement spending plan, it leaves out the variables that actually decide whether retirement feels secure — the income floor, the expense profile, the tax structure, and the way the pieces are sequenced.
The better question isn’t what percentage can I withdraw. It’s what does the necessary stuff cost, what guaranteed income is already in place, and how is the portfolio structured to handle whatever’s left over without forcing me to sell at the bottom. The plan that answers those three questions doesn’t need a rule of thumb to feel safe. It already is.
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.
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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Thomas Clark is a Series 65 licensed investment advisor and experienced trader. He specializes in investing, retirement planning, and market analysis, helping individuals build wealth and make informed financial decisions.
