Compounding

$1,500/month at 7% DRIP CAGR over 20 years = ~$782K; at 4%, ~$550K — a $232K gap driven entirely by the assumed return rateEvery 1% shift in assumed return adds or removes ~$110K–$130K in terminal value at year 20; sensitivity is nonlinearTax drag in taxable accounts reduces effective reinvestment yield by 15–25%; account type is a primary, not secondary, variable2020 S&P dividend cuts (~14% aggregate quarterly reduction) pushed realized DRIP rates 200bps below model assumptions for high-yield ETFsDRIP reinvestors during the Q1 2020 drawdown outperformed non-reinvestors by 12–18% by year-end — a volatility effect flat-line models ignore entirely What the 20-Year Simulation Data Actually Shows Monthly $30K investment 20-year compound growth simulation Running $1,500/month at 4%, 7%, and 10% for 20 years produces a divergence that widens sharply in the back half of the period. At year 10, the gap between the 4% and 10% paths is roughly $200K. By year 20, that gap exceeds $590K. The simulation chart above captures the inflection clearly: the 10% curve breaks away from the 4% path around year 12, when accumulated DRIP dividends begin compounding on themselves at scale.[FRED] ...

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. ...