Depends on the investment type. Stocks (S&P 500): historically ~10% annualized. Real estate: typically 8-12% total return. Bonds: 3-6%. Savings accounts: 4-5% (current HYSA rates). Business investments: 15-25%+ for successful small businesses. Anything above 20% annualized is very strong.

ROI (Return on Investment) measures total return as a percentage of the initial investment, regardless of time. CAGR (Compound Annual Growth Rate) expresses that same return as an equivalent annual rate — it’s comparable across investments of different durations. CAGR is more useful for comparing multi-year investments.