Understanding ROI vs. CAGR
When evaluating an investment in 2026, it's easy to look at the total percentage gain. However, professional investors look at the time-weighted return. That's where CAGR comes in.
What is ROI?
Return on Investment (ROI) is the simple percentage of your total profit or loss relative to the cost of the investment. It doesn't care if the gain took one day or ten years.
ROI = ((Final Value - Initial Cost) / Initial Cost) × 100
What is CAGR?
The Compound Annual Growth Rate (CAGR) represents the annual rate of return that would be required for an investment to grow from its beginning balance to its ending balance, assuming the profits were reinvested at the end of each year of the investment's lifespan.
CAGR = [(Final Value / Initial Cost) ^ (1 / Years)] - 1
Practical Examples
- Stock Market: If you invested $10,000 in an index fund and it grew to $15,000 over 5 years, your ROI is 50%, but your CAGR is approximately 8.45%.
- Cryptocurrency: High volatility often leads to massive ROIs in short periods. A 100% ROI in 6 months results in a staggering CAGR, but it also carries higher risk.
- Real Estate: Remember to include maintenance costs and taxes in your "Initial Cost" to get an accurate ROI.