A practical guide to choosing between ROI and CAGR when evaluating investments, with examples showing when each metric gives you the clearest picture.
Published: March 1, 2026
ROI shows total percentage gain without a time element; CAGR normalizes returns to an annual rate for fair cross-investment comparison.
Both metrics measure investment performance but answer different questions:
ROI = (Gain / Cost) × 100
CAGR = (End Value / Start Value)^(1/n) – 1
Example: Investment A returns 60% over 3 years (CAGR: 17.0%). Investment B returns 40% over 2 years (CAGR: 18.3%). ROI says A is better; CAGR reveals B grew faster annually.
Use ROI for single-period comparisons, business projects, and quick profitability checks where time isn't a variable.
ROI excels in scenarios where time is constant or irrelevant:
ROI's simplicity is its strength. When every option has the same time horizon, there's no need to annualize.
Use CAGR whenever you're comparing investments held for different time periods or benchmarking against market indices.
CAGR is indispensable for:
Any published "average annual return" for mutual funds or indices is typically CAGR, making it the standard language of investment performance.
Walk through three scenarios to see how the wrong metric can lead to poor investment decisions.
Scenario 1—Stock vs Real Estate:
You bought stocks that gained 80% over 5 years and a rental that gained 50% over 3 years. ROI says stocks win (80% > 50%). CAGR reveals the rental grew at 14.5%/year vs stocks at 12.5%/year. The rental was the better annual performer.
Scenario 2—Two Funds, Same Horizon:
Fund A returned 25% over 2 years; Fund B returned 22% over 2 years. Time is identical, so ROI is sufficient—Fund A wins.
Scenario 3—Retirement Planning:
You need to project portfolio growth over 30 years. Use CAGR (e.g., 7% real return) to compound forward, not cumulative ROI.
Use our ROI & CAGR calculator to run your own comparisons.
Yes. If you know the ROI and the holding period: CAGR = (1 + ROI)^(1/years) – 1. For example, 50% ROI over 4 years = (1.50)^(1/4) – 1 = 10.67% CAGR.
Most professionals use CAGR (or IRR for irregular cash flows) because it enables apples-to-apples comparison across different time periods. ROI is used for quick single-period assessments.
CAGR works for any investment held over a defined period. For crypto, be aware that high CAGR over short periods can be misleading due to extreme volatility. Always consider the time period and risk alongside CAGR.