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The Rule of 40 is a widely-used SaaS and software industry heuristic: a healthy company's revenue growth rate plus profit margin should add up to 40% or more. It's popular with venture capital investors and SaaS operators as a quick way to balance growth against profitability — not a strict accounting formula.
This calculator adds your revenue growth rate and profit margin to find your Rule of 40 score.
How it works
Enter your revenue growth rate (year-over-year, as a percentage) and profit margin (as a percentage). The tool adds the two together and checks whether the result meets or exceeds the 40% benchmark.
- Enter revenue growth rate (%).
- Enter profit margin (%).
- Click Calculate to see your results.
Examples
A fast-growing, moderately profitable company
25% revenue growth plus a 15% profit margin gives a Rule of 40 score of exactly 40 — right at the benchmark.
Who should use it
- Benchmarking a SaaS or software company's overall health for internal review or investor conversations.
- Comparing trade-offs between prioritizing growth versus profitability.
Industry applications
- SaaS and software company financial analysis
- Venture capital and startup benchmarking
Advantages
- Simple way to check the widely-referenced 40% benchmark in one calculation.
- Allows meaningfully comparing growth-focused and profitability-focused companies on the same scale.
Limitations
- A popular heuristic, not a rigorous or universally-agreed accounting standard — different investors may apply it differently.
Common mistakes to avoid
- Treating the Rule of 40 as a precise, universally-applicable requirement rather than a general industry heuristic.
- Using inconsistent time periods for growth rate and profit margin (e.g., quarterly growth against annual margin).
Best practices
- Use consistent, comparable time periods (like trailing twelve months) for both your growth rate and profit margin figures.
Tips
- If your score is below 40, consider whether pushing growth or profitability further would move the needle more — the Rule of 40 doesn't care which lever you pull, only the combined total.