Returns jump around year to year, which makes investments hard to compare. CAGR collapses that messy path into one smooth annual growth rate — the number investors actually use to judge performance.
Answer first: the compound annual growth rate (CAGR) is the constant yearly rate that would take your starting amount to your ending amount over a given period, as if it grew by exactly that much every year. It assumes profits are reinvested and compound, so it captures the real, geometric growth of an investment rather than a naive average.
CAGR = (Ending value ÷ Beginning value)1 ÷ years − 1
Example: $10,000 that grows to $20,000 over 7 years has a CAGR of (20,000 ÷ 10,000)1/7 − 1 ≈ 10.4% per year. Compute your own in the annualized return (CAGR) calculator.
This is the trap CAGR is built to avoid. Suppose an investment gains 50% one year and loses 50% the next. The simple average return is 0% — sounds like you broke even. But $100 grows to $150, then falls to $75: you actually lost 25%. CAGR captures that reality (it would report roughly −13.4% a year), because it multiplies the growth factors instead of adding the percentages.
That is why financial regulators require funds to report standardized average annual total returns — a compounded, CAGR-style figure — rather than misleading simple averages, so investors can compare products on equal footing (SEC Investor.gov).
CAGR's strength — smoothing — is also its weakness. It draws a straight line to the endpoint and says nothing about the white-knuckle drops along the way, so two investments with the same CAGR can have wildly different risk. Pair it with a risk measure like the Sharpe ratio to see the full picture. CAGR also ignores money you added or withdrew mid-period, and it is strictly backward-looking: it summarizes what happened, not what will.
Educational, not advice: CAGR is a historical summary that hides volatility and ignores cash flows; it does not predict future returns. This page is for learning only and is not financial advice. For official basics, see the U.S. SEC at investor.gov.
Run the numbers in the annualized return calculator or the investment return calculator, see compounding in the compound interest calculator, and read about the time value of money.
Last updated 25 June 2026 · Written by Mustafa Bilgic. Educational only — not financial advice.
CAGR, the compound annual growth rate, is the single steady annual rate at which an investment would have grown to its final value over a period, assuming profits were reinvested each year. It smooths out volatile yearly returns into one comparable figure.
CAGR = (ending value ÷ beginning value)^(1 ÷ number of years) − 1. For example, growing $10,000 to $20,000 over 7 years is (20000/10000)^(1/7) − 1, or about 10.4% per year.
A simple average just adds the yearly returns and divides by the number of years, ignoring compounding. CAGR accounts for the fact that gains build on gains and losses shrink the base, so it always equals or is below the simple average when returns vary.
CAGR hides volatility — it shows a smooth line even if the real path was a roller coaster — and it ignores any cash you added or withdrew along the way. It is a backward-looking summary, not a prediction of future returns.