What it actually tells you
It summarises endpoints on a compounded basis. It does not describe the path, volatility or consistency of growth between them.
THE CALCULATION
Formula
CAGR = [(ending value ÷ starting value)^(1 ÷ years) − 1] × 100
A simple example
Educational example: Revenue increasing from ₹100 crore to ₹172.8 crore across three years gives (172.8 ÷ 100)^(1/3) − 1 = 20% annually. Four annual observations contain three annual intervals.
All figures in this guide are illustrative teaching examples.
Read both sides of the number.
What high can mean
A high CAGR may reflect sustained expansion, acquisitions or a depressed starting point. The endpoint alone cannot distinguish these.
What low can mean
A low CAGR may reflect stagnation or a mature business. A negative CAGR with positive endpoints describes contraction.
When a high reading may be justified
Repeatable demand, profitable reinvestment and a long growth runway can support strong compounding. Check each year rather than assuming smooth growth.
When a low valuation may be dangerous
A low valuation may rely on a historical CAGR that ends at an unsustainable peak. Past endpoint growth is not a forecast.
BEYOND THE TEXTBOOK
Professional interpretation
Choose economically meaningful dates, count intervals correctly and disclose organic versus acquired growth. Compare multiple windows and inspect annual results alongside the summary rate.
Compare in context.
Live comparison data is not connected. No company or market averages are supplied here.
Sector context
Commodity earnings can make endpoint selection especially misleading. Stable service revenue may be better suited to multi-year trend analysis.
Industry context
For acquisitive industries, compare revenue per share, returns on capital and organic expansion as well as aggregate revenue CAGR.
Historical comparison
Use rolling windows to expose sensitivity to start and end years. Avoid selecting only the period that produces the most impressive number.
Peer comparison
Match duration, fiscal dates, currency and inflation basis. Constant-currency growth and reported growth answer different questions.
Limitations
Conventional CAGR is unsuitable with zero or negative starting values. It does not account for contributions or withdrawals in an investment account; use an appropriate cash-flow-aware return measure there.
Common investor mistakes
Averaging annual growth percentages and calling it CAGR; counting observations instead of intervals; projecting a historical rate indefinitely.
Example interpretation
A 20% revenue CAGR connects these endpoints. Examine margins, cash conversion and funding to determine whether the expansion created value for each shareholder.
Questions worth asking
Is CAGR the average annual return?
It is a geometric annualised rate, not the arithmetic average of yearly returns.
Does CAGR show risk?
No. Two very different paths can have the same beginning, ending value and CAGR.
Analyse these together
A single ratio cannot capture the business. Combine it with:
Further reading
TROUGH editorial explanations and educational examples. Sources provide reference material; they do not supply live company figures.
FROM UNDERSTANDING TO RESEARCH
Analyse this on a real stock.
Take the question into the analyst. Company data becomes available when a reliable data connection is enabled.
Open Stock Analyst →