Why the 4% Rule Doesn't Work for Real Retirees.

Here's the short answer: the 4% rule doesn't work for most real retirees because it was never meant to be a spending plan. It was a survival test. Back in 1994, financial planner William Bengen ran the numbers to find the highest withdrawal rate that would have survived every 30-year stretch in market history, even the worst starting years. His answer landed near 4%, based on a fixed 50/50-ish portfolio, no fees, and no mid-course adjustments (Source: Bengen, "Determining Withdrawal Rates Using Historical Data," Journal of Financial Planning, 1994; the ~4% success rate was later corroborated by the Trinity Study, Cooley, Hubbard & Walz, 1998). That makes it a fine sanity check. It makes a poor blueprint, because real retirements don't hold still the way the math assumes they do.

The video below walks through Bob and Susan, a composite couple whose retirement looks nothing like the tidy 4% calculation. The sections after it pull apart the assumptions baked into the rule and update the picture for 2026.

▶ Video: youtube.com/watch?v=qsUfzLw7trU, “The Truth About the 4% Rule (And Why It Might Ruin Your Retirement)”

Watch: Patrick Shope on why the 4% rule can quietly ruin a good retirement.

What the 4% rule actually promised (and where it earns its keep)

The rule is simple, and that's the appeal. Withdraw 4% of your portfolio the first year, then bump that dollar amount for inflation each year after. It also gives you a clean savings target. If you want $60,000 a year from your portfolio, multiply by 25 and you get $1.5 million. That's genuinely useful when you're trying to figure out how much money you need to retire.

So I'm not here to trash it. As a rough gauge, it works. If your withdrawal rate is well above 4%, that's worth a hard conversation. If it's well below, you may have more room than you think. The trouble starts when people treat a worst-case survival number like a law of physics and plan their whole life around it. Let me walk through where that goes wrong.

Myth: you'll spend the same amount every year for 30 years

The belief sounds reasonable. Set your number, adjust for inflation, spend it every year until you're 95. The reality is that almost nobody spends that way. Researchers call the actual pattern the retirement spending smile. Early retirement, roughly your late 60s to mid-70s, tends to be your highest-spending stretch. You travel, you help the kids, you finally replace the roof. By your 80s, dinner out and family visits might be plenty. Then spending can spike again if long-term care shows up, sometimes at $8,000 a month or more.

I've never met a retiree who spent the exact same inflation-adjusted amount two years running, let alone thirty. Life doesn't move in a straight line, so why would your income strategy pretend that it does? A flat rule forces you to underspend in your healthiest, most active years, and it can still leave you exposed later when health costs climb.

Myth: your portfolio has to fund everything

The 4% rule quietly assumes your investments pay for 100% of your retirement. But most retirees have Social Security, and some have a pension too. The portfolio is there to fill the gap, not carry the whole load.

Let me show you the math. Say you need $60,000 a year and $25,000 of that comes from Social Security. Your portfolio only has to produce $35,000. On a $1 million portfolio, that's a 3.5% withdrawal rate, not 4%. Now flip it. If you blindly pull the full 4%, you take $40,000 every year. That's $5,000 more than you needed, and over a decade you've withdrawn (and paid tax on) about $50,000 you never had to touch. Applying a generic rate without counting your other income is one of the most common mistakes I see.

Myth: 30 years fits every retirement

Bengen built the rule around exactly 30 years. Retire at 65, plan to 95, fine. But retire at 60 and you might need 35 years. Retire at 55 and you're looking at 40. Bengen's own work shows that longer retirements call for lower withdrawal rates, so 4% can be too aggressive for an early retiree. On the other side, retire at 70 with a 20-year horizon and 4% may be leaving real money on the table. The rule treats a 58-year-old and a 72-year-old identically, and they are not in the same situation at all.

Myth: set it and forget it

This is the big one, and it's where timing can wreck a perfectly good plan. The rule is built on average returns over 30 years. You don't get average returns. You get actual returns in a specific order, and the order matters enormously. This is called sequence of returns risk.

Picture two retirees with identical portfolios and identical withdrawals. One gets strong returns early and weak returns later. The other gets weak returns early and strong returns later. Same average over 30 years, wildly different outcomes. When you're pulling money out during a down market, you're selling shares cheap and you have less left to ride the recovery. Someone who retired in early 2000 hit the dot-com crash, then 2008, all while taking withdrawals.

I've had folks come in three years into retirement already off track, not because they did anything wrong, but because they retired in 2022 instead of 2019. You can do everything right and still get an unlucky start. The 4% rule offers no guidance for that, which is exactly why understanding sequence of returns risk and how a bucket strategy answers it matters so much.

Bob and Susan: what a flexible plan looks like

Let's put numbers on it. Bob and Susan, both 62, retire with $1.2 million. The 4% rule hands them $48,000 in year one. But their real life doesn't match that.

In years one through five, before Social Security starts, they spend about $75,000. Bob has a small part-time gig worth $10,000, so they actually need $65,000 from the portfolio. That's a 5.4% withdrawal rate, which sounds scary next to 4%. Here's the thing: it's temporary. In year six their combined Social Security kicks in at about $35,000, and by then their spending has eased toward $65,000 a year as the heavy travel slows down. Now they only need $30,000 from the portfolio. That's a 2.5% withdrawal rate.

You see what happened there. They front-loaded spending in the healthy, active years and dialed way back once Social Security arrived. If they'd stuck rigidly to 4%, they'd have either shortchanged those early years, missing trips they don't get back, or convinced themselves they needed to save far more and worked two or three extra years for no reason.

So what should you use instead of the 4% rule?

Stop treating retirement as one flat, 30-year block and start treating it as seasons, each with its own income sources and spending. That's the whole shift. In the early years, before Social Security and while you're healthiest, a higher rate can make sense. Once benefits and any pension turn on, you pull that rate back down. There are structured ways to do this, and I've laid them out in our piece on flexible alternatives to the 4% rule.

None of this means Bengen was wrong. Even the safe-rate research keeps moving. Some updated work suggests something closer to 3.9% is realistic today, while Bengen himself has revised his figure upward to around 4.7% under different assumptions. The point isn't the decimal. The point is there's no magic number, and chasing one, whether it's a withdrawal rate or the $1.26 million Americans say they think they need, is how people end up planning for someone else's retirement instead of their own.

If you've been running on the 4% rule, you haven't done anything wrong. There's just a more personal way to do this, one that reflects your timeline, your income sources, and your real spending. If you'd like a plan built around your seasons instead of a formula, start a conversation with us.

What's the point of a portfolio that lasts 40 years if you're too afraid to use it for the things that matter to you? The goal was never to die with the biggest pile. It's to spend confidently while you can, and still have enough for whatever comes last.

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