Head-to-head
Revenue Growth Rate vs CAGR
Both numbers describe the same five years of revenue, and they disagree by almost six points a year. The growth rate divides the change by the starting figure. CAGR finds the constant rate that would produce the same ending figure. One is an arithmetic summary, the other is a statement about compounding, and only the second one reproduces the revenue you actually have.
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The simple version is the one that gets quoted in pitch decks, because it is bigger. Total growth of 108.33% over five years, divided by five, gives 21.67% a year — a figure that treats each year's gain as if it were measured against the original base rather than against the previous year's. Compound 21.67% for five years and you land at $3.2M instead of $2.5M.
CAGR is smaller precisely because it is honest. It solves for the rate that turns $1.2M into $2.5M in five years, which is 15.81%, and that rate can be applied year by year to reproduce the actual path. It is still a smoothed figure — the real years were uneven — but it is one that survives being checked.
The practical rule is simple: use the simple rate only for a single period, and CAGR for anything spanning more than one. Mixing them is how a company reports 21.67% growth while its own model compounds to a number it never hit.
Revenue growth
How To Calculate Revenue Growth Rate
Revenue growth is a gap divided by where the business started. The annualised figure is a different question with a different answer, and collapsing the two into one number is why most growth reports quietly overstate themselves.
CAGR
How To Calculate CAGR
CAGR compresses a messy multi-year history into one smooth annual rate. Because it reports the same kind of number for a seven-year stock hold and a five-year revenue line, it is the standard way to put two very different histories on one scale.
How They Differ
| Attribute | Revenue growth | CAGR |
|---|---|---|
| What it measures | Change over the period, divided by the base | The constant rate that reproduces the end value |
| Formula | (End − Start) ÷ Start | (End ÷ Start)^(1 ÷ years) − 1 |
| Single period | Correct, and identical to CAGR | Identical to the growth rate |
| Multiple years | Overstates, because the base never grows | Correct, because it compounds |
| Five years, $1.2M to $2.5M | 108.33% total, 21.67% a year | 15.81% a year |
| Compounding the answer | Gives $3.2M, which is wrong | Gives $2.5M, which is right |
| Sensitivity to the start year | Very high — a small base inflates it | Lower, because the base sits inside the root |
| Best for | One year, or a total change with no annualising | Anything spanning several years |
The Same Numbers, Both Ways
Revenue of $1.2M in the first year and $2.5M five years later, summarised both ways.
- Starting revenue
- $1,200,000
- Ending revenue
- $2,500,000
- Years
- 5
| Line | Revenue growth | CAGR |
|---|---|---|
| Total change | 108.33% | 108.33% |
| Per year | 21.67% | 15.81% |
| End value if that rate is compounded | $3,199,185 | $2,500,000 |
| Error against the real figure | $699,185 | $0 |
| Years to double at that rate | 3.53 | 4.72 |
| Periods it can be applied to | One | Any number |
Dividing 108.33% of growth by five gives 21.67% a year, and compounding that rate would turn $1,200,000 into $3,199,185 — $699,185 more revenue than the business ever had. The rate that actually reproduces $2,500,000 is 15.81%, which is 5.86 points lower and correct.
When To Use Each
Revenue growth
- You are reporting a single year's change and there is no annualising to do.
- You want the total change across a period without implying anything about the path.
- The period is one year or less, where the two methods give the same answer anyway.
CAGR
- You are annualising anything that spans more than one year, such as a five-year track record.
- You need a rate that can be compounded forward to reproduce the actual ending value.
- You are comparing growth across companies or periods with different lengths.
Common Questions
Why is the simple average always higher?
Because it divides a change measured against the original base by the number of years, while each year's real gain is measured against a larger base. The gap widens with both the growth rate and the number of years, so it is barely visible over two years and enormous over ten.
Can CAGR be negative?
Yes, whenever the ending value is below the starting one. A business going from $2.5M to $1.2M has a CAGR of −13.66%, which is a useful sanity check: the same formula works in both directions without special cases.
Does CAGR mean the growth was smooth?
No. CAGR is a single rate that reproduces the endpoints, and it says nothing about the path between them. A company that fell 40% then tripled has the same CAGR as one that grew steadily, which is why it is always read alongside the yearly figures.
Which one do investors expect?
CAGR, for any period longer than a year. It is the figure that survives being recomputed, and the simple average is a well-known way to inflate a track record — which is exactly why a sophisticated reader checks which one is being quoted.
How do I handle a year with zero revenue?
You cannot: the ratio is infinite and CAGR has no value. Start the series at the first year with meaningful revenue and say so, rather than reporting a rate computed from a near-zero base.
More Comparisons
- ROI vs CAGR
ROI measures the whole return; CAGR turns it into a compound annual rate. A 100% return over five years is 20% a year by division but 14.87% a year in reality.
- Nominal vs Real Return
A 10% return with 3% inflation is a 6.80% real return, not 7%. $10,000 grows to $16,105 in five years, but only $13,892 of that is in today's money — $2,213 of the gain is the price level moving, not you.
- Down Payment vs Loan-to-Value
A $400,000 house with $80,000 down is 20% down and 80% LTV — the same fact twice. Put 5% down instead and the loan grows to $380,000, the payment rises $379.24 a month, and mortgage insurance usually arrives with it.
Sources
- Compound annual growth rate — definition and calculation — Corporate Finance Institute
- Revenue growth — how it is measured and reported — Corporate Finance Institute
- How to read a financial statement — U.S. Securities and Exchange Commission
Both methods sit in Finance.