CAGR (Compound Annual Growth Rate)
CAGR (Compound Annual Growth Rate) is a financial metric measuring average annual growth rate over multiple years. It's used for evaluating investments and business growth.
What is CAGR (Compound Annual Growth Rate)?
CAGR is an indicator expressing multi-year growth as an average annual rate. For example, if investment grows from $1 million to $1.5 million over 5 years, CAGR calculates “what percentage growth occurred annually on average?” CAGR smooths volatility—even with “20% one year, minus 5% another year” swings, CAGR shows the average pace.
In a nutshell: CAGR answers “growth happened over 5 years, but what percentage grew annually on average?”
Key points:
- What it does: Simplifies multi-year growth into a single average annual percentage
- Why it’s needed: Fairly compare growth speeds across different periods and companies
- Who uses it: Investors, company executives, analysts, business planners
Calculation method
CAGR calculation formula:
CAGR (%) = (End Value ÷ Start Value)^(1/Years) - 1 × 100
Example 1: Investment growth
$100,000 held for 5 years becoming $150,000:
- End Value ÷ Start Value = 150,000 ÷ 100,000 = 1.5
- 1.5 to the 5th root = 1.5^(1/5) ≈ 1.0845
- 1.0845 - 1 = 0.0845
- 0.0845 × 100 = 8.45%
This means roughly 8.45% annual growth.
Example 2: Business revenue growth
Software company revenue growing from $2 million to $5 million over 4 years:
- 5 million ÷ 2 million = 2.5
- 2.5^(1/4) ≈ 1.2607
- 1.2607 - 1 = 0.2607
- 0.2607 × 100 = 26.07%
This company shows robust 26% annual growth.
Benchmark guidelines
“Good” CAGR levels vary by industry and asset class:
| Investment Type | Target CAGR |
|---|---|
| Savings accounts | 0-2% |
| Bonds | 2-5% |
| Stock market (long-term average) | 6-10% |
| Mature company revenue growth | 5-15% |
| Growth company revenue growth | 15-40% |
| Startup companies | 40%+ |
| Tech companies (early stage) | 100%+ possible |
Note that higher CAGR typically correlates with higher risk. A 100% startup CAGR is impressive but represents high bankruptcy risk.
Why it matters
CAGR’s importance comes from enabling fair comparison across different periods and investments.
For example, Investment A grew 100% over 3 years (26% CAGR) and Investment B grew 150% over 5 years (20% CAGR). Using CAGR, you see Investment A has higher growth rate. Different time periods don’t prevent fair comparison.
Business evaluation matters too. During hiring or investment decisions, “a company with 30% CAGR over 3 years” versus “5% CAGR” hugely affects valuation. CAGR reveals temporary booms versus sustained growth.
Understanding CAGR calculation cautions
Caution 1: Don’t overlook volatility
Investment A shows “stable 8.45% annual growth” while Investment B shows “50% Year 1, -30% Year 2, -10% Year 3, 0% Year 4, 50% Year 5.” Both might reach the same final value with identical CAGR of 8.45%. But A has low risk while B has high risk. CAGR alone doesn’t reveal risk.
Caution 2: Be careful with short-term data
A startup claiming “400% growth over 2 years!” represents roughly 100% CAGR. However, “mature company 8% CAGR over 20 years” is far more trustworthy. Shorter periods are more prone to random effects.
Caution 3: External environment changes impact future
High past CAGR doesn’t guarantee future CAGR. Oil companies with historically high CAGR might face lower future growth due to decarbonization.
Related terms
- ROI — Return on investment. Measures shorter-term performance than CAGR
- Velocity — Scrum team speed metric (different context for “growth”)
- Compound Interest — Theoretical foundation for CAGR
- IRR (Internal Rate of Return) — Growth rate metric when cash flows exist
Frequently asked questions
Q: What’s the difference between CAGR and average growth rate (AAR)? A: CAGR reflects compound growth (geometric mean). AAR is simple average. With significant volatility, AAR appears higher than CAGR. CAGR accurately reflects compound effects.
Q: How do you calculate CAGR with negative growth? A: Same formula. If $1 million becomes $500,000 over 4 years, CAGR = (0.5)^(1/4) - 1 ≈ -13%, showing 13% annual decline.
Q: Should I invest in a business with 5% CAGR? A: Depends on industry and context. For startups, 5% is low. For real estate, it’s reasonable. Risk-adjusted returns matter significantly.
Q: Can tech company CAGR exceed 50%? A: Yes. Early-stage AI and cloud service companies report 100%+ CAGR. However, such high growth typically doesn’t persist as companies mature and growth naturally slows.
