CAGR Explained: The Single Best Metric for Comparing Investments

Compare two investments by total return alone, and you'll often land on the wrong conclusion. An investment up 50 percent over two years looks worse on paper than one up 80 percent over five — until you notice the second one had two and a half times longer to get there. That's the exact problem CAGR solves.

What CAGR Actually Measures

CAGR — Compound Annual Growth Rate — answers one question: what constant annual growth rate, compounded every year, would take your starting value to your ending value over that time period?

It's not an average of each year's return. It's the single smoothed rate that explains the whole journey from start to finish, however bumpy that journey actually was.

Why This Beats Absolute Return

Absolute return tells you the total gain. Nothing about how long it took, though — which makes it a poor tool for comparing investments held over different periods.

CAGR fixes that by putting everything on the same annual footing. A fund up 150 percent over 7 years, and one up 60 percent over 3 — directly comparable, once you convert both to an annualized rate.

A Worked Example

Say $10,000 grew to $25,000 over 7 years.

Absolute return: a straightforward 150 percent gain.

CAGR:

CAGR = (Ending Value / Starting Value)^(1/Years) - 1

CAGR = (25,000 / 10,000)^(1/7) - 1 = (2.5)^(1/7) - 1 ≈ 14.0%

That 14 percent is the annual rate that, compounded every year for 7 straight years, turns $10,000 into $25,000. One number you can hold up against other investments, other periods, or a benchmark, and get a meaningful comparison.

Our CAGR Calculator runs this instantly for any two values and time period.

What CAGR Doesn't Tell You

CAGR smooths the path between start and end — that's exactly its strength, and exactly its blind spot. Two investments can post the same CAGR, one moving steadily, the other swinging wildly.

Two funds, both showing a 10 percent CAGR over five years. One delivered roughly 10 percent every single year. The other gained 40 one year, lost 15 the next, and still averaged out the same. Anyone who needed money during that second fund's down year would've had a very different experience than the CAGR alone suggests.

So CAGR works best paired with a volatility measure — standard deviation, maximum drawdown — rather than used on its own.

Using CAGR Well

Compare over the same period. A 5-year CAGR and a 10-year one aren't directly comparable — different market conditions can dominate each. Match the periods first.

Look at multiple horizons. Checking 3, 5, and 10-year CAGR for the same fund shows whether strong performance is consistent, or was one unusually good stretch.

Don't chase the highest number. A fund with an eye-catching CAGR, built on a handful of extreme years, might carry more risk than you're prepared for. Read it alongside volatility and your own tolerance.

FAQ

Is CAGR the same as annualized return?

Yes, pretty much interchangeable. Both describe the same smoothed, compounded annual growth rate.

Can CAGR be negative?

Yes — if the ending value is lower than the starting value, CAGR comes out negative.

What's a good CAGR for stocks?

Historically, broad equity markets have delivered roughly 8 to 12 percent over long, multi-decade periods — though it varies a lot by market and era. Treat any historical figure as context, not a guarantee.

Does CAGR apply outside investments?

Yes — commonly used for revenue growth, user base growth, anything that compounds over multiple years.

Putting It to Use

CAGR won't tell you everything, but it's a fair, apples-to-apples starting point for comparing funds, stocks, or time periods. Pair it with a volatility measure and you've got a genuinely useful pair of numbers.

Try the CAGR Calculator for your own portfolio or any fund you're evaluating.