Latest / The Financial Freedom Podcast with Fexingo: Quitting Your Job, Living Off Investments, Independence / The 4 Percent Rule Is Not a Retirement Plan
Transcript
- Lucas: So the 4 percent rule. It is probably the single most famous number in retirement planning, and I think it has done more harm than good for early retirees. Luna: That is a pretty strong take. I mean, it is the rule that supposedly tells you how much you can safely withdraw without running out of money. What is wrong with it? Lucas: The problem is that people treat it like a guarantee. The Trinity Study from 1998 looked at historical data and found that a 4 percent withdrawal rate, adjusted for inflation, would have survived every 30-year period in US history. But that is a historical observation, not a forward-looking promise. Luna: Right, and a lot of people hear 'survived every period' and assume it will always work. Lucas: Exactly. And if today was actually useful to you, the way these stay ad-free is listener support — buy me a coffee dot com slash fexingo. A small way to keep that going. Luna: Yeah, it really helps. And honestly, knowing people find value in it is what keeps us doing this. Lucas: So let's dig into why the 4 percent rule is not a plan. First, the Trinity Study assumed a 30-year retirement. If you are retiring at 40, you need to plan for 50 years or more. The failure rate for a 4 percent withdrawal over 50 years is much higher. Luna: And the study only looked at US stocks and bonds. International diversification might change the odds. Lucas: Plus, the rule assumes you stick to the same inflation-adjusted withdrawal every year, no matter what. That is the part that breaks in real life. If the market drops 30 percent in your first year, you are supposed to keep spending the same dollar amount. That is how you guarantee failure. Luna: So what is the alternative? Just guess and hope? Lucas: No, you use a dynamic strategy. One of the most practical is called guardrails. You set a target withdrawal rate, say 4 percent, but you also set upper and lower boundaries. If your portfolio grows, you can spend more. If it shrinks, you cut back. Luna: So it is like a feedback loop instead of a fixed rule. Lucas: Exactly. The most common version comes from financial planner Jonathan Guyton. He suggests an initial withdrawal rate of up to 5 percent, but with rules: if your portfolio drops more than 20 percent from its starting value, you cut withdrawals by 10 percent. If it goes up more than 20 percent, you increase by 10 percent. Luna: That makes intuitive sense. You are not blindly sticking to a number when the world changes. Lucas: Let's walk through an example. Say you retire in June 2026 with a $1 million portfolio. You plan to withdraw $40,000 in the first year. If the market drops 25 percent over the next two years, your portfolio might be worth $750,000. Under the 4 percent rule, you would still take $40,000, plus inflation adjustments. That is a 5.3 percent withdrawal rate — risky. Luna: With guardrails, you would cut to $36,000. That is a 4.8 percent rate, much safer. Lucas: And if the market recovers and your portfolio hits $1.2 million, you can increase to $44,000. The guardrails keep your spending aligned with reality. Luna: What about inflation? The Trinity Study adjusted for inflation every year. Does the guardrail approach do that too? Lucas: Great question. In Guyton's model, you skip inflation adjustments in years when the portfolio has negative returns. That protects you from ratcheting up spending after a loss. Other versions use a partial inflation adjustment. The key is flexibility. Luna: So the fixed 4 percent rule is really just a starting point, not a lifelong prescription. Lucas: Exactly. And that is my main issue. People hear '4 percent' and think they are done planning. But retirement income is a lifelong math problem. You need to re-evaluate every year. Luna: Is there any historical period where even guardrails would have failed? Lucas: If you retired in 1966 at the start of stagflation, even a 4 percent withdrawal with guardrails would have been tight. That period is famous for breaking retirement plans. But with guardrails, you would have cut spending multiple times, and most studies show you would have survived. Luna: So guardrails reduce the chance of total failure, but they cannot guarantee it. Lucas: No strategy can guarantee anything. But what guardrails do is give you a framework for making decisions instead of pretending the future is predictable. Luna: One thing I have seen early retirees do is combine guardrails with a cash buffer. They keep two years of expenses in cash or short-term bonds, so they never have to sell stocks in a down market. Lucas: That is a great add-on. It is called a bucket strategy. Bucket one is cash, bucket two is bonds, bucket three is stocks. You refill the cash bucket from stocks when the market is up. It is a way to enforce the guardrail discipline. Luna: I think the biggest takeaway is that retirement planning is not about finding one magic number. It is about building a system that adapts. Lucas: And that system has to account for your personal spending flexibility. If you can cut spending by 20 percent in a bad year, you can probably start with a higher withdrawal rate than someone who cannot. Luna: Exactly. The 4 percent rule was designed for a retiree with fixed expenses. Early retirees often have more flexibility. Lucas: So my advice is: start with 4 percent as a rule of thumb, but build guardrails around it. Plan to adjust. And if you want to be really safe, look at the data for 50-year retirements with a 3.5 percent initial rate. Luna: And maybe keep a side hustle. That is the ultimate guardrail. Lucas: That is a whole other episode. But yes, even a small amount of part-time income can dramatically reduce sequence risk. Luna: Alright, so the 4 percent rule is a starting point, not a finished plan. Use guardrails, stay flexible, and remember that the market does not care about your retirement date. Lucas: Well said. That is it for this episode. We will be back next time with another deep dive.