CAGR (Compound Annual Growth Rate)

CAGR is the metric that smooths out the chaos. Real business growth is lumpy: you're up 40% one year, flat the next, down 5% the third. CAGR tells you the steady annual growth rate that would have gotten you from point A to point B over a given period, as if growth had been perfectly consistent.

It's the single most common way to express historical growth or project future growth in business planning, investor presentations, and marketing strategy documents. And it's routinely misused by people who don't understand what it actually measures.

The Formula

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

Where n = number of years

Example: Revenue grew from $10M to $25M over 5 years.

CAGR = ($25M / $10M)^(1/5) - 1 = (2.5)^0.2 - 1 = 0.201 = 20.1%

This means the business grew at an equivalent steady rate of 20.1% per year over the five-year period, even though actual annual growth rates may have varied wildly.

Why Marketers Use CAGR

Market sizing and TAM analysis. When you're estimating the total addressable market in 2030, you start with today's market size and apply a CAGR. "The global SaaS market was $273B in 2023 and is projected to reach $908B by 2030, representing a CAGR of 18.7%." That's how market research reports express growth.

Campaign and channel benchmarking. Comparing growth rates across channels with different starting points. If organic search revenue grew from $500K to $2M in 3 years (CAGR: 59%) while paid social grew from $2M to $4M (CAGR: 26%), organic is growing faster on a rate basis even though paid added more absolute dollars.

Goal setting and forecasting. "We need 25% CAGR over the next 3 years to hit our $50M target." CAGR makes growth targets concrete and testable.

What CAGR Hides

This is where people get into trouble. CAGR smooths everything, which means it hides important information:

The CAGR of 20.1% looks like steady, healthy growth. The reality is a rollercoaster with an 80% spike, a 17% decline, and decelerating growth. The volatility matters for resource planning, hiring, and cash management, but CAGR doesn't show it.

CAGR is a summary, not a story. Always look at the underlying annual data.

CAGR vs. Other Growth Metrics

CAGR vs. Average Annual Growth Rate: These are not the same. Average annual growth is the arithmetic mean of individual year growth rates. CAGR accounts for compounding. With volatile growth, the average will overstate actual performance. If you grew 100% year one and shrank 50% year two, your average annual growth is 25%, but your CAGR is 0% (you started and ended at the same number).

What's Changed Recently

AI market projections lean heavily on CAGR. The generative AI market CAGR estimates range from 35% to 50% depending on the research firm, which means projections for 2030 vary by hundreds of billions of dollars. The choice of CAGR assumption drives the entire market narrative.

Investor scrutiny of CAGR claims has increased. Companies cherry-picking favorable start and end dates to inflate CAGR (start from a down year, end at a peak) face more pushback. Sophisticated investors now ask for year-by-year data alongside any CAGR claim.

SaaS benchmarking uses CAGR extensively. Bessemer Venture Partners' Cloud Index and similar benchmarks report CAGR by company size cohort, giving SaaS marketers clear targets for what "good" growth looks like at their stage.

Limitations

CAGR has real blind spots that marketers should understand:

• Ignores volatility between start and end dates
• Sensitive to endpoint selection (cherry-picking dates can manipulate the result)
• Assumes reinvestment at the same rate (may not be realistic)
• Doesn't account for risk (a 20% CAGR in crypto is not the same as 20% CAGR in consumer staples)
• Not useful for negative-to-positive transitions (if you go from -$5M to +$10M, the formula produces misleading results)

Frequently Asked Questions

When should I use CAGR vs. year-over-year growth?

Use CAGR for multi-year trends, market sizing, and comparing growth across different time periods. Use YoY growth for recent performance, quarterly reviews, and understanding current momentum. Present both when the audience needs the full picture.

How do I calculate CAGR in Excel?

Two ways: =(Ending/Beginning)^(1/Years)-1 or use the RATE function: =RATE(Years, 0, -Beginning, Ending). Both give the same result.

Can CAGR be negative?

Yes. If ending value is less than beginning value, CAGR is negative. A business that went from $50M to $30M over 5 years has a CAGR of -9.7%. Negative CAGR is a clear signal of structural decline.

What's a "good" CAGR?

It depends entirely on context. S&P 500 historical CAGR: about 10%. High-growth SaaS: 30-50%. Mature consumer goods: 3-5%. Compare to your industry and stage, not to absolute numbers.

Sources & References

1. Investopedia. "Compound Annual Growth Rate (CAGR)." investopedia.com
2. Corporate Finance Institute. "CAGR." corporatefinanceinstitute.com
3. Bessemer Venture Partners. "Cloud Index." bvp.com/cloud-index
4. Wall Street Prep. "CAGR Calculator." wallstreetprep.com

Written by Conan Pesci | Last Updated: April 2026