Latest / The Financial Freedom Podcast with Fexingo: Quitting Your Job, Living Off Investments, Independence / The Safe Withdrawal Rate That Adjusts for Your Actual Spending
Transcript
- Lucas: Let's talk about the retirement withdrawal rule you've never heard of — or if you have, you probably dismissed it as too complicated. It's called the guardrails approach, and it might be the single most practical alternative to the 4 percent rule for anyone who doesn't want to eat cat food in their 80s or die with millions they never spent. Luna: Guardrails. That sounds like something you'd see on a mountain road, not a retirement plan. What does it actually mean? Lucas: It means you don't set one fixed withdrawal amount and blindly increase it for inflation every year. Instead, you set a reasonable starting withdrawal — say, 5 percent of your portfolio — and then you only adjust that amount up or down when your portfolio value changes by more than a certain percentage. Typically, the guardrail is 20 percent. Luna: So if your portfolio drops 20 percent, you cut your spending. And if it jumps 20 percent, you give yourself a raise. That actually makes intuitive sense. Lucas: Exactly. And the beauty is, it prevents you from either locking in losses by sticking to a too-high withdrawal in a bear market, or underspending your whole retirement because you're afraid to touch your money. Let me give you a concrete example. Lucas: Say Sarah retires at 55 with a $1 million portfolio and decides to use the guardrails method. She picks a starting withdrawal rate of 5.5 percent — so $55,000 in year one. Now, in year two, her portfolio might have grown to $1.1 million or dropped to $900,000. The guardrail says she only adjusts her withdrawal if the portfolio moves more than 20 percent from its starting value. Luna: Right. So if it's at $1.1 million, that's a 10 percent increase — within the guardrail — so she keeps withdrawing $55,000 adjusted for inflation. But if it drops to $900,000, that's a 10 percent loss, again within the guardrail, so she keeps the same inflation-adjusted amount. Lucas: Exactly. She only makes a change if the portfolio crosses the 20 percent threshold. Now imagine a real bear market — say the portfolio drops to $750,000. That's a 25 percent loss, so she triggers a downward adjustment. Her new withdrawal becomes 5.5 percent of the current $750,000, which is $41,250. She cuts her spending by about 25 percent. Luna: Ouch. But that's exactly what you need to do to avoid running out of money. And then when the market recovers, she gets a raise. Lucas: Precisely. And the research backs this up. The original Trinity Study — the one that gave us the 4 percent rule — actually showed that a 5 percent withdrawal rate with guardrails had a higher success rate than a straight 4 percent rule, because it keeps withdrawals aligned with portfolio reality. Luna: I can see why people might resist it, though. It introduces uncertainty into your spending. You can't plan your life around a fixed number. Lucas: That's the trade-off. But the alternative — the 4 percent rule — only seems fixed. In reality, if you hit a bear market early, the 4 percent rule often forces you to either cut spending anyway or face a high failure rate. The guardrails just formalize the adjustment. Lucas: And there's a way to smooth it out. You can pair the guardrails with a cash bucket. Keep, say, two years of living expenses in cash or short-term bonds. That way, when the market drops and you need to cut, you don't have to sell stocks at the bottom. You draw from the cash bucket while you wait for the portfolio to recover. Luna: So the guardrails tell you when to adjust, and the cash bucket gives you the time to make that adjustment without forced selling. That's a powerful combo. Lucas: It is. And the other criticism I hear is complexity — people say they don't want to recalculate every year. But it's actually less work than the 4 percent rule. With the 4 percent rule, you have to recalculate the inflation adjustment every year. With guardrails, you only check whether your portfolio has crossed the threshold. Most years, you do nothing. Luna: That's a good point. So the starting withdrawal rate — you said 5.5 percent. Is that what you'd recommend for most people? Lucas: It depends on your time horizon and your flexibility. For a 30-year retirement, 5.5 percent with guardrails has historically worked in the US market. But if you're retiring at 40, you might want to start at 4.5 percent or 5 percent, because you have more years to weather. The key is the guardrail band — the 20 percent trigger — which is what makes the strategy robust. Luna: And what about inflation? How do you handle that within the guardrails? Lucas: Great question. Most guardrail models adjust for inflation in the years when you don't trigger a change. So in a normal year where the portfolio is within the band, you increase your withdrawal by inflation. But when you do trigger a change — say a downward adjustment — you recalculate the new base from the current portfolio value, and then start inflation adjustments from that new base. Lucas: This prevents the 'ratchet effect' where you keep increasing for inflation even after a huge loss. It keeps your spending realistic. Luna: I like that. One more question — what if the market does something unprecedented? Like a 50 percent drop that stays down for years? Lucas: That's the stress test. In a scenario like that, the guardrails would force a significant cut — maybe 40 or 50 percent — which is painful but survivable. The 4 percent rule would likely fail in that scenario because it wouldn't cut fast enough. So guardrails are actually safer in extreme cases. Lucas: And you can build in a floor. Some retirees set a minimum spending level — say 70 percent of their initial real withdrawal — and refuse to cut below that. If the portfolio drops so much that the guardrails would take you below that floor, you'd need to find other income or accept a higher failure probability. But that's a personal choice. Luna: So the guardrails approach is really about building a withdrawal system that adapts to reality, rather than pretending the future is predictable. Lucas: Exactly. And it's backed by real academic research. A 2015 paper by Jonathan Guyton and William Klinger showed that a withdrawal strategy with guardrails actually increased the sustainable withdrawal rate compared to fixed rules. Their 'Capital Preservation' model allowed starting withdrawal rates as high as 6.2 percent with high success rates. Luna: That's a big number. Six point two percent. So for someone with a $1 million portfolio, that's $62,000 a year. Lucas: Yes, but with the understanding that you'll cut hard if the market goes south. And the guardrails are what make that safe. Without them, a 6 percent withdrawal is dangerous. With them, it's manageable. Lucas: I think the real takeaway is this: the 4 percent rule is a good starting point, but it's not a plan. A plan accounts for the fact that your spending will change, the market will fluctuate, and you need a system to navigate that. The guardrails give you that system. Luna: And it forces you to be honest about your flexibility. If you can cut spending by 20 or 30 percent in a downturn, you can retire with a higher starting withdrawal rate. If you can't, you need a lower rate. Lucas: Right. And that's a conversation everyone should have with themselves before they pull the trigger on early retirement. Lucas: You know, Luna, we've talked about so many withdrawal strategies on this show — the 4 percent rule, the 2 percent rule, variable withdrawals, the Roth ladder. And all of them have trade-offs. But the thing I keep coming back to is that no single strategy fits everyone. That's why we keep having these conversations. Luna: And we're able to do it without ads telling you to buy gold or sign up for a robo-advisor. That's a nice perk. Lucas: It really is. Look, we deliberately keep these episodes ad-free because we think the information should stand on its own. If you find value in that — if one of these episodes has helped you rethink your plan or feel more confident — and you want to support that, the link is buy me a coffee dot com slash fexingo. No pressure, no perks, just a way to keep the lights on. Luna: Yeah, I think that's important. We don't want to monetize your attention through ads. And we appreciate everyone who helps make that possible. Lucas: Absolutely. So back to guardrails — one last point. The key to making this work is to actually rebalance your portfolio when you trigger an adjustment. If you cut spending, you should also make sure your asset allocation hasn't drifted too far. Rebalance into bonds if stocks have fallen, or into stocks if they've risen, to keep your risk profile consistent. Luna: That's a good reminder. Because if you cut spending but your portfolio is now 90 percent stocks because of the drop, you might be taking on more risk than you planned. Lucas: Exactly. So the guardrails method works best as part of a broader retirement income plan that includes a target asset allocation, a cash reserve, and a rebalancing schedule. It's not just about the withdrawal number. Luna: Alright, Lucas. I think I'm going to dig into that Guyton and Klinger paper this weekend. Where can listeners find more? Lucas: The original paper is 'Sustainable Withdrawal Rates from Your Retirement Portfolio' from 2015. You can find it on the Financial Planning Association website or by searching online. And of course, we'll link to it in the show notes. But more importantly, I hope people take the principle — adjust your spending when reality changes — and apply it to their own numbers. Luna: That's the bottom line. Thanks, Lucas. Lucas: Thanks, Luna. And to our listeners — here's to building a retirement that actually works, no matter what the market throws at us.