Why the famous 4% withdrawal rule for retirement may not be the answer

SIMPLE ideas to address a complicated problem tend to have staying power. For decades, the 4 per cent rule has served as the anchor point for retirement planning, promising an easy and elegant solution to one of life’s most perplexing retirement puzzles: How much is enough?

The rule says a retiree can safely withdraw 4 per cent of their initial retirement portfolio, adjusted annually for inflation, for 30 years. This offers a gift of certainty.

But certainty is often the enemy of truth. The 4 per cent rule is not a timeless law of physics; it is predicated on a specific and exceptional time in American financial history. Relying on it today ignores the reality of the vastly different investment dynamics across time, geographies and even longevity.