What Is CAGR and How to Calculate It

Updated June 2026 · By ToolFern

CAGR appears constantly in financial reports, investment pitches, and business presentations. It looks technical, but the idea behind it is straightforward. Once you understand what CAGR measures and why it matters, you can use it to cut through misleading "average return" figures and compare investments or businesses on equal terms.

What CAGR means

CAGR stands for Compound Annual Growth Rate. It answers one question: if a value grew from a starting point to an ending point over a number of years, what single annual rate of growth produces that same result?

Actual growth rarely happens at a perfectly constant rate. A business might grow 30% one year and 5% the next. An investment portfolio might gain 20% one year and lose 8% the following year. CAGR smooths all of that into one clean number that represents the equivalent steady-state growth rate over the whole period.

The CAGR formula

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

Where n is the number of years.

Worked example

A company's revenue grows from $1,000,000 to $2,500,000 over 5 years.

• Ending Value / Beginning Value = 2,500,000 / 1,000,000 = 2.5
• 1/n = 1/5 = 0.2
• CAGR = 2.5^0.2 - 1 = 1.2011 - 1 = 0.2011 = 20.11%

The company's revenue grew at a compound annual rate of approximately 20% per year over five years, regardless of whether any individual year was higher or lower.

CAGR vs. average annual return

These two numbers are often confused, and the difference matters:

Imagine an investment of $100 that gains 50% in year 1 ($150) and loses 50% in year 2 ($75). The simple average return is (50% + -50%) / 2 = 0%. But you actually lost money: you started with $100 and ended with $75.

The CAGR is: (75/100)^0.5 - 1 = 0.866 - 1 = -13.4%. This correctly reflects the actual performance.

CAGR is always the more honest number when comparing investments or assessing past performance. Simple average return can be deeply misleading after volatile years.

What CAGR is used for

• Comparing investments: Two funds with different start dates and end dates can be compared directly on a CAGR basis. A fund that returned a CAGR of 12% over 10 years clearly outperformed one that returned 9% over 7 years, even if the absolute returns look similar.
• Business reporting: Revenue CAGR, customer CAGR, and user growth CAGR are standard metrics in investor presentations. They let analysts quickly assess the growth trajectory without getting into year-by-year variance.
• Goal setting: If you want to turn $10,000 into $50,000 in 10 years, you need a CAGR of about 17.5%. Knowing this helps you choose the right assets or savings rate.
• Market sizing: Industry reports frequently use CAGR to project future market sizes based on current trends.

Limitations of CAGR

CAGR tells you the start and end, but nothing about the path in between. Two investments can have identical CAGRs but wildly different risk profiles. One might be a stable bond rising steadily each year; the other might be a volatile stock that crashed 60% before recovering. The CAGR does not capture volatility, drawdown, or risk.

Always pair CAGR with other metrics when evaluating investments: maximum drawdown, standard deviation, or Sharpe ratio give you a fuller picture of risk-adjusted returns.

Frequently asked questions

What does CAGR stand for?

CAGR stands for Compound Annual Growth Rate. It is the rate at which an investment, revenue, or any other metric would have grown if it had grown at a steady rate each year over a given period, assuming all growth was reinvested.

What is a good CAGR?

It depends on context. For a large-cap stock portfolio, 7 to 10 percent per year is considered solid (the S&P 500 has historically returned around 10% annually). For a small startup, 20 to 30 percent in early years is expected. Always compare against a relevant benchmark.

What is the difference between CAGR and average annual return?

Average annual return adds up each year's return and divides by the number of years. CAGR calculates the single constant rate that produces the same end result as the actual varying returns. CAGR is almost always the more accurate number because it accounts for the compounding effect of losses and gains.