Latest / The Financial Freedom Podcast with Fexingo: Quitting Your Job, Living Off Investments, Independence / The 5 Percent Rule That Beats Sequence Risk
Transcript
- Lucas: So the 4 percent rule is everywhere, right? Safe withdrawal rate, 30 years, never run out of money. But here's the thing — it's actually pretty rigid. It says you adjust your withdrawal for inflation every year, no matter what the market does. That's a recipe for disaster if you hit a bad sequence early. Luna: Right, sequence risk. We've talked about that. If the market tanks in your first few years of retirement and you keep taking out 4 percent plus inflation, you can deplete your portfolio even if the long-term average return is fine. Lucas: Exactly. So there's a different approach that's been gaining traction in the FIRE community — it's called the guardrail method, or sometimes the 5 percent rule. The idea is you start with a higher withdrawal rate, like 5 percent, but you adjust it dynamically based on portfolio performance. Luna: So you're not locked into a fixed inflation-adjusted amount. You're letting the market tell you how much you can spend. Lucas: Right. The most famous version comes from financial planner Jonathan Guyton and researcher William Bengen — they ran the numbers on this. The rule is: you set a corridor, or guardrails. Typically, if your withdrawal rate falls below 4.5 percent of your current portfolio value, you can actually increase your spending by 10 percent. And if your withdrawal rate rises above 5.5 percent, you cut your spending by 10 percent. Luna: So you're giving yourself permission to spend more when the market's been good, and you're forced to tighten up when it's been bad. That sounds more realistic than just ignoring the market. Lucas: Exactly. And the research shows this actually has a lower failure rate than the static 4 percent rule, even though you start with a higher initial withdrawal. Guyton's original work found that starting at 5 percent with these guardrails had a 97 percent success rate over 40 years — compared to about 90 percent for the classic 4 percent rule. Luna: Wait, so you can take out more money, and you're less likely to run out? That seems counterintuitive. Lucas: It's because the guardrails force you to cut spending exactly when the portfolio is most vulnerable — right after a big drop. And they let you spend more when the portfolio has recovered and can sustain it. The fixed 4 percent rule never adjusts, so it can drain a portfolio that's already down. Luna: Let's run through an example. Say I have a million-dollar portfolio and I start at 5 percent — so fifty thousand dollars in year one. Lucas: Good example. Year one, the market drops 20 percent. Your portfolio goes to $800,000. But you still need to withdraw fifty thousand, right? So your withdrawal rate becomes 6.25 percent — that's above the upper guardrail of 5.5 percent. Luna: So I'd have to cut my spending by 10 percent. That means I withdraw forty-five thousand instead of fifty. Lucas: Right. So now you're taking out less from the down portfolio. Then say the next year the market recovers 25 percent. Your portfolio might bounce back to about $940,000. But you're still only taking forty-five thousand, so your withdrawal rate is around 4.8 percent — right in the middle of the guardrails. So you'd hold steady. Luna: And then if the market has a great year, maybe up 30 percent, my portfolio jumps to maybe $1.1 million. My withdrawal is still forty-five thousand — that's about 4.1 percent. That's below the lower guardrail of 4.5 percent, so I can increase spending by 10 percent. Lucas: Exactly. So now you're up to about forty-nine thousand five hundred dollars. The key insight is that you're smoothing your spending relative to the market, but not perfectly — you're letting the portfolio guide you. Luna: I can see the math. But the behavioral challenge is real. When the market is down, you're already stressed, and now you have to cut your spending. That's hard. Lucas: It's the most difficult part. The guardrails are a rule, but they require discipline. The good news is the cuts are only 10 percent, not 30 percent. And the research shows that most years you're not hitting the guardrails at all — only about one in five years. Luna: So most of the time you just stick with your previous year's amount, adjusted for inflation or not? Lucas: Right. You don't automatically adjust for inflation every year. You only adjust when you hit a guardrail. So your spending can stay flat for several years, then jump up or down when the market moves enough. Luna: That makes it simpler. You're not doing a calculation every January. You're only checking when the market has had a big move. Lucas: Exactly. And you can implement it with a simple spreadsheet or even a monthly glance at your portfolio. The rule is mechanical, not emotional — which is the whole point. Luna: What about inflation? If we have a period like 2021 to 2023 where inflation is high, won't that erode my buying power if I'm not adjusting my withdrawals? Lucas: That's a great question. The guardrail method actually handles inflation better than the fixed rule in some ways. Because if inflation is high and the market is also doing well — which often happens in the early stages of inflation — then you'll hit the lower guardrail and get a spending increase. But if inflation is high and the market is flat or down, then you're cutting spending anyway. So it's not perfect, but it's adaptive. Luna: So the guardrails act as a kind of shock absorber. They let you spend more when things are good and pull back when they're bad. Lucas: Right. And the research shows that over 30-40 year periods, this approach actually supports higher total spending than the 4 percent rule — you end up spending more in lifetime dollars because you're not leaving as much on the table. Luna: One thing I worry about: if I cut spending after a market drop, what if it takes years to recover? I could be living on a reduced budget for a long time. Lucas: That's possible. But the historical data shows that most bear markets recover within two to three years. The worst cases — like 2000 to 2003 — took about five years to get back to even. But in those cases, the guardrails would have had you cutting twice, because the market kept dropping. Luna: So you'd be cutting from, say, fifty thousand down to forty-five, then down to about forty thousand five hundred. That's a 19 percent reduction from your starting amount. That's painful. Lucas: It is. But compare that to the alternative — under the 4 percent rule, you'd be taking out fifty thousand plus inflation every year, which in a prolonged downturn would have decimated your portfolio. You'd face a much bigger cut later, or you'd run out entirely. The guardrails front-load the pain and protect your portfolio. Luna: That's a good way to frame it. The temporary pain is worth the long-term protection. Lucas: Exactly. And I think that's the core trade-off. You're trading a smaller chance of a catastrophic failure for a higher chance of moderate adjustments along the way. Luna: Let's talk about implementation. How do you actually set this up? Do you just calculate your withdrawal rate each year and compare it to the guardrails? Lucas: Pretty much. At the beginning of each year, you look at your portfolio value, divide it by your previous year's withdrawal amount — that gives you your current withdrawal rate. If it's below 4.5 percent, you increase your spending by 10 percent. If it's above 5.5 percent, you decrease by 10 percent. Otherwise, you keep the same dollar amount. Luna: And what about the initial withdrawal? You start at 5 percent of the starting portfolio? Lucas: Yes. So if you have a million dollars, you take out fifty thousand in year one. And then you don't adjust for inflation — you just apply the guardrails each year. That's the pure version. Luna: Some people might want a lower starting rate, like 4.5 percent, to be extra safe. Does that work? Lucas: Sure. You can set your own starting point and your own guardrails. The classic paper used 5 percent, 4.5 percent lower, and 5.5 percent upper. But you could do 4.5 percent starting, with guardrails at 4 percent and 5 percent. The key is the dynamic adjustment, not the exact numbers. Luna: And what about taxes? Withdrawals from a tax-deferred account are taxed as income, so the actual spending power is less than the withdrawal. Lucas: Right. The rule assumes you're thinking about after-tax spending. So you'd need to adjust for your tax rate. If you're in a 20 percent effective tax rate, then to spend forty thousand, you need to withdraw fifty thousand. So you'd apply the guardrails to the gross withdrawal, not the net. Luna: That complicates the math a bit, but it's manageable. I could see this being really useful for early retirees who are flexible with their spending. Lucas: Yeah, that's the ideal user. Someone who can cut back on travel or dining out in a bad year, and then splurge when the market is up. If your lifestyle is fixed — like you have a mortgage and essential expenses that don't budge — then this is harder. Luna: Right. So it's for people who have some discretionary spending in their budget. Which is most early retirees who have saved aggressively. Lucas: Exactly. And that's the conversation we keep coming back to on this show — how to make your money last while still enjoying your life. Speaking of which, I've been thinking about something. If you find value in these deep dives, we want to keep the show free and ad-free. Listener support is what makes that possible. Luna: Yeah, it's a small thing but it makes a big difference. If you've ever saved money or made a smarter decision because of something you heard here, you can support us at buy me a coffee dot com slash fexingo. Lucas: It really helps us keep going. Alright, back to the guardrails. One thing I haven't mentioned is that this method works best with a portfolio that's at least 50 percent stocks. If you're too conservative, the guardrails might never trigger upward adjustments. Luna: Because bonds don't grow enough to push the withdrawal rate down. So you need growth assets to get the upside. Lucas: Right. The guardrails are really designed for a stock-heavy portfolio — like 60 to 80 percent equities. That's another thing to keep in mind. Luna: So if someone has a 40-60 stock-bond split, this might not be the best strategy. Lucas: Probably not. But for the typical early retiree who's comfortable with volatility, the 5 percent guardrail method is a powerful upgrade over the 4 percent rule. It's more realistic, it's more adaptive, and it could let you spend more without taking on more risk. Luna: I like it. I think I'd want to run a Monte Carlo simulation on my own numbers, but the logic is solid. One last question: what do you do in a year like 2022 when both stocks and bonds are down? Lucas: That's the worst case — a balanced portfolio gets hit. In that case, the guardrails would force a cut. But because both asset classes are down, your portfolio is down more, so the cut might be deeper. It's painful, but it's exactly what you need to do to survive. Luna: So no magic bullet. But the guardrails give you a framework to make the hard decision without second-guessing yourself. Lucas: Exactly. And that structure is the whole point. I'm curious — do you think most people could stick to this in a real bear market? Or would the emotional temptation to not cut be too strong? Luna: I think it depends on how automated they make it. If you set up automatic transfers and really commit to the rule, it's easier. But if you're checking your portfolio every day, it's tough. I'd say automate the withdrawal and check the guardrails once a year. Lucas: Good advice. Automate the discipline. Alright, that's the guardrail method — a simple, dynamic rule for a more resilient retirement. Thanks for listening, and we'll see you next time.