Let's Talk About The CoastFIRE Epidemic

The Money Guy hosts open with a warning: CoastFIRE is a genuinely appealing concept, but it is also one that can easily go wrong if the underlying assumptions are not stress-tested. The central question of the episode is whether CoastFIRE—the strategy of saving aggressively early in life and then stopping contributions entirely, letting compound growth carry you to a traditional retirement—is as safe and simple as its proponents suggest. The answer, after a detailed walkthrough of the math and the variables, is a cautious "yes, but only if you measure twice and cut once."

What CoastFIRE Actually Is

CoastFIRE is defined as the point at which your current investments are projected to grow to 25 times your annual expenses by a traditional retirement age without you contributing any additional money. The appeal is obvious: you front-load the pain, build a large nest egg early, and then take your foot off the accelerator. The hosts illustrate this with a hypothetical case study of "CoastFIRE Carly." She saves aggressively from age 25 to 35, accumulating $500,000. She then stops saving entirely and lets that money grow at an assumed 8% annual return. By age 65, that $500,000 has grown to nearly $5.5 million. That sounds like a massive sum, but the hosts immediately stress the importance of inflation-adjusting that number. In today's dollars, that $5.5 million supports roughly $