Compound Annual Growth Rate.

Updated

CAGR is the cleanest way to compare growth across companies, products, or time periods of different lengths. Instead of saying "we grew 280% over four years," CAGR translates that into "we grew at 39% per year compounded" — which is directly comparable to any other annual growth rate, anywhere.

How Joy Subscriptions handles this

Joy Subscriptions, a build-to-order subscription app for Shopify, breaks the compound annual growth rate down far enough to act on rather than only to report.

Retention and churn cohorts show who is staying and who is leaving, and when, rather than only how many.

The intuition

If your subscription MRR was $100,000 at the start of year 1 and $250,000 at the end of year 4, you grew 150% over four years. But that's not 37.5% per year (150% ÷ 4) — because growth compounds. The actual annual rate that, if applied consistently, would turn $100K into $250K in four years is about 25.7%. That's the CAGR.

When to use CAGR

  • Comparing multi-year growth across products, business lines, or competitors.
  • Reporting investor-facing growth in fundraising decks and annual reports.
  • Forecasting steady-state growth when you have a long enough history to smooth seasonal noise.
  • Benchmarking against market growth (e.g., the subscription ecommerce market grew at 16% CAGR from 2018 to 2024 — how did you compare?).

When NOT to use CAGR

  1. Volatile periods. CAGR smooths everything into a single rate. If 90% of your growth came in one year, CAGR hides that.
  2. Very short periods. A 6-month CAGR is mostly noise. Use month-over-month or quarter-over-quarter growth instead.
  3. Forecasting future growth. Past CAGR is a description, not a prediction. Many businesses' growth rates decline sharply as they scale.
  4. Negative starting values. The math breaks. Use absolute change or a different metric instead.

For subscription merchants

CAGR is most useful when reporting MRR or ARR growth across three years or more. Below that, month-over-month and year-over-year growth rates tell the operating story better. Above that, CAGR becomes the natural lens — and the metric investors will ask for first.

See compound annual growth rate formula for the calculation walkthrough and growth rate for the broader concept.

Frequently asked questions

What does CAGR mean in business?+
CAGR (compound annual growth rate) is the smoothed annual rate of growth between two points in time, accounting for compounding each year. It expresses multi-year growth as a single annualized number — the rate at which a value would have grown if it grew at the same percentage every year.
How is CAGR different from average growth rate?+
Average growth rate (the simple average of annual growth rates) ignores compounding. CAGR accounts for compounding — the fact that this year's growth is calculated off last year's higher base. CAGR is always lower than or equal to the simple average for the same period.
Is a 25% CAGR good?+
For an established subscription business, very strong. For an early-stage subscription business, average-to-low — investor-backed subscription companies often target 100%+ CAGR in the first 2–3 years. The benchmark depends entirely on stage and category.
Can CAGR be misleading?+
Yes. CAGR smooths a single rate across an entire period, hiding volatility, one-time spikes, or declines. A business with CAGR of 30% might have grown 0% one year and 70% the next. Always pair CAGR with year-over-year detail for the complete picture.

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