What Is CAGR? How to Calculate Investment Returns

You see a mutual fund claiming “15% returns.” But is that 15% last year? Average over 5 years? Total since inception? Without knowing how returns are measured, the number is meaningless.

CAGR (Compound Annual Growth Rate) is the standard way to measure investment returns over time. It tells you the consistent annual rate at which your investment grew — smoothing out the ups and downs.

CAGR is the annualized rate of return that takes an investment from its beginning value to its ending value over a specific period, assuming profits are reinvested. Formula: CAGR = (Ending Value / Beginning Value)^(1/n) − 1, where n = number of years.

What Does CAGR Mean?

CAGR (Compound Annual Growth Rate) represents the rate at which an investment would have grown if it grew at a steady rate every year. In reality, investments fluctuate — but CAGR gives you one clean number to compare performance.

It’s the most widely used metric for comparing mutual funds, stocks, FDs, and any investment over multiple years.

CAGR Formula

CAGR = (Ending Value / Beginning Value)^(1/n) − 1

Where:

Ending Value = Final investment value
Beginning Value = Initial investment amount
n = Number of years

Example

You invested ₹1,00,000. After 5 years, it’s worth ₹1,80,000.

CAGR = (1,80,000 / 1,00,000)^(1/5) − 1 = (1.8)^0.2 − 1 = 0.1247 = 12.47%

Your investment grew at an equivalent of 12.47% per year, compounded annually.

CAGR vs Absolute Returns vs Average Returns

Metric	What It Measures	When to Use
Absolute Return	Total % gain from start to end	Short-term (under 1 year)
Average Annual Return	Simple average of yearly returns	Misleading — avoid for comparison
CAGR	Compounded annual growth rate	Any period over 1 year
XIRR	Returns with irregular cash flows	SIP investments

Why Average Returns Are Misleading

Consider an investment:

Year 1: +50%
Year 2: −30%

Average return: (50 − 30) / 2 = 10% per year

Actual result: ₹1,00,000 → ₹1,50,000 → ₹1,05,000

CAGR: (1,05,000 / 1,00,000)^(1/2) − 1 = 2.47%

The “average” says 10%, but you actually earned only 2.47% per year. CAGR tells the truth.

Typical CAGR Benchmarks in India

Investment	Typical 10-Year CAGR	Risk
Savings account	3–4%	None
Fixed deposit	5–7%	None
PPF	7–8%	None
Gold	8–10%	Low-Medium
Nifty 50 (index)	10–13%	Medium-High
Equity mutual funds (diversified)	12–15%	High
Small-cap funds	14–18%	Very High

Past CAGR does not guarantee future returns. Equity returns are not fixed — they depend on market conditions (Source: AMFI India — Market Risk Disclaimer).

When to Use CAGR

Comparing mutual funds — 5-year CAGR is the standard comparison metric
Evaluating lump sum investments — How did your FD or stock perform over time?
Setting realistic expectations — If Nifty 50 CAGR is 12%, don’t expect 25% from a diversified fund
Financial planning — Projecting future corpus based on assumed CAGR

When NOT to Use CAGR

SIP investments — Use XIRR instead (multiple cash flows at different times)
Periods under 1 year — Use absolute returns
Comparing risk — CAGR doesn’t show volatility. A 12% CAGR fund might have swung between −20% and +40% yearly.

CAGR for Financial Planning

If you assume 12% CAGR for equity and invest ₹10,000/month via SIP:

Duration	Amount Invested	Estimated Value (12% CAGR)
5 years	₹6,00,000	₹8.2 lakh
10 years	₹12,00,000	₹23.2 lakh
20 years	₹24,00,000	₹99.9 lakh
30 years	₹36,00,000	₹3.5 crore

Note: These are estimates. Actual returns will vary year to year. CAGR is used for planning, not prediction.

FAQs

Is higher CAGR always better?

Not necessarily. Higher CAGR often comes with higher risk and volatility. A fund with 15% CAGR but −30% drawdowns may not suit conservative investors. Always consider risk alongside returns.

What’s a good CAGR for mutual funds?

For equity mutual funds in India, 12–15% CAGR over 10+ years is considered good. Anything consistently above 15% is excellent. Below 10% for equity over long periods suggests underperformance.

Can CAGR be negative?

Yes. If your investment lost value over the period, CAGR will be negative. Example: ₹1,00,000 becoming ₹80,000 over 3 years = CAGR of −7.2%.

How is CAGR different from compound interest?

Compound interest is a fixed, guaranteed rate (like FD at 7%). CAGR is a backward-looking metric — it tells you what the equivalent compound rate WAS, not what it will be. Market investments don’t have fixed compound interest.

Should I use CAGR or XIRR for my SIP?

XIRR. Since SIP involves multiple investments at different dates, CAGR (which assumes one lump sum) doesn’t accurately reflect your returns. XIRR accounts for the timing of each installment.

Conclusion

CAGR is the single most useful number for evaluating investment performance over time. It cuts through the noise of yearly fluctuations and gives you one honest answer: “How much did my money actually grow per year?” Use it to compare funds, set expectations, and plan your financial goals — but remember, past CAGR doesn’t guarantee future returns.