08/28/2026
The 4% rule is missing a critical piece π
Most retirees treat this number like a guaranteed safe zone. But the original research modeled a very specific scenario, and recent Morningstar data suggests the evidence-backed starting rate is now closer to 3.9% for a 30-year retirement.
That small difference compounds in ways that aren't obvious at first glance.
And the percentage itself isn't even the biggest risk.
Two retirees can start with identical portfolios and identical withdrawal rates. If one retires into a down market and the other doesn't, their balances can look dramatically different within a decade. Early losses force you to sell more shares to cover withdrawals, and those shares don't come back when the market recovers.
A fixed withdrawal rate never asks the question that actually matters most: how much of your spending is truly non-negotiable?
The answer to that question, not the percentage, is what gives a retirement income plan real staying power.
Hit follow for more retirement income breakdowns like this one.