Expense Ratio Compounding: 0.03% vs 0.5% Over 30 Years
A 0.47 percentage-point fee gap means 6.97% net versus 6.50% net on a 7.00% gross-return assumption.With $1,500 invested monthly for 30 years, total contributions reach $540,000 and the projected ending balance is roughly $1.74 million at 0.03% versus $1.60 million at 0.50%.The spread is about $143,000, or roughly 8% of the lower-fee ending balance, before taxes and slippage.As of Apr. 15, 2026, VOO traded near $640.44 with a 1.11% dividend yield and a 27.19 P/E, while COWZ traded near $63.02 with a 2.05% yield and a 16.77 P/E.Over the latest 5-year window cited by providers, VOO was at 12.81% annualized, SPLG at 11.42%, and COWZ at 14.61%, showing that fee alone does not explain every outcome. The fee gap that looks small until time does the math Monthly investment 20-year compound growth simulation Expense ratio is one of those numbers that looks harmless in isolation. Three basis points. Fifty basis points. That sounds like rounding error. It is not. Vanguard’s own explanation is direct: the fee is pulled from fund returns, not billed separately. That matters because the deduction happens every year, on a balance that keeps changing. ...