CAGR Explained: How to Measure Real Investment Returns

CAGR strips out volatility to show what your investment truly earned per year. Learn the formula, common mistakes, and when CAGR misleads.

1.What CAGR is and why it matters

CAGR (Compound Annual Growth Rate) is the smoothed annual return that takes an investment from its beginning value to its ending value over a given period. Formula: **CAGR = (End Value / Start Value)^(1/n) − 1**, where n is years. Example: you invested ₹1 lakh in 2016, it's worth ₹3.5 lakh in 2026. CAGR = (3.5/1)^(1/10) − 1 = **13.3% per year**. This doesn't mean it grew 13.3% every year — it means the smoothed equivalent is 13.3%.

2.CAGR vs absolute returns vs XIRR

Absolute return: (3.5L − 1L)/1L = 250%. Sounds impressive but doesn't tell you the time it took. CAGR: 13.3%/year — tells you the annualised growth. XIRR: used when there are multiple cash flows (like SIPs). For a lumpsum investment, CAGR is the correct metric. For SIPs with monthly inflows, use XIRR. Comparing a 3-year CAGR to a 10-year CAGR is misleading — always compare same-period CAGRs.

3.When CAGR misleads

CAGR hides volatility. A stock that went ₹100 → ₹50 → ₹200 in 2 years has a CAGR of 41.4%, but the investor who sold at ₹50 lost 50%. CAGR also doesn't account for the sequence of returns. Two portfolios with the same CAGR can have vastly different risk profiles. Always look at maximum drawdown alongside CAGR. A fund with 14% CAGR and 60% max drawdown is fundamentally different from one with 12% CAGR and 25% max drawdown.

4.Key takeaway

CAGR is the best single metric for comparing lumpsum investment returns over the same time period. But always pair it with drawdown and volatility data. Use our CAGR calculator to quickly compute the annualised return on any investment given start value, end value, and holding period.