'It went from $10,000 to $15,000' tells you nothing until time enters the frame. Two years or ten years for the same 50% is the difference between brilliant and mediocre. CAGR flattens any messy growth into one comparable yearly rate.
Updated September 03, 2026, after a fresh review, with updated visuals and links.
Why CAGR beats raw percentages
The formula compounds: CAGR = (end / start)^(1/years) - 1. From $10,000 to $15,000 in 3 years is 14.47% yearly, not '16.67%' (50% divided by 3), because each year's growth builds on the last.
The same math rates anything periodic: portfolio value, company revenue, follower counts, even city rent. One rate, comparable across completely different topics.
Context bands: under 3% is inflation territory, 7-10% resembles long-run stock index averages, over 15% is rare outside high-risk plays or short lucky windows.
Worth remembering
- CAGR hides volatility: a fund that crashed 40% then doubled can show the same CAGR as a boring climber. Always check the path, not just the rate.
- The 5-year projection under the result assumes the same rate continues; markets do not sign that contract.
Frequently asked
What if my start value was zero or negative?
CAGR is undefined from zero (nothing to compound) and meaningless from a negative start (debts use other metrics). Use it for positive balances only.
How do I compare against inflation?
Subtract: real growth is CAGR minus inflation. A 7% CAGR with 3% inflation is roughly 4% of actual new purchasing power.
