Decumulation Phase
The retirement stage when investors systematically withdraw from their portfolio to fund living expenses.
What is Decumulation Phase?
The decumulation phase is the stage of the investment lifecycle that begins at or near retirement, when an investor transitions from accumulating wealth to systematically withdrawing funds from their portfolio to cover living expenses. Managing the decumulation phase requires balancing the need for current income against the risk of outliving savings (longevity risk), while also managing sequence-of-returns risk—the danger that poor market performance early in retirement can permanently impair the portfolio. Common decumulation strategies include the 4% safe withdrawal rule, dividend-income approaches, bucket strategies, and partial annuitization.
Example
Financial planner William Bengen's landmark 1994 study found that a retiree who withdraws 4% of their initial portfolio in year one and adjusts for inflation annually has historically sustained their portfolio for at least 30 years across all historical market cycles, establishing the widely used 4% rule.