SaaS metrics

Rule of 40 Calculator

Check whether your SaaS business passes the Rule of 40 — the sum of growth rate and profit margin.

Enter your values

Results update as you type. Nothing is sent anywhere — the maths runs in your browser.

%

Year-over-year revenue growth percentage.

%

EBITDA or free cash flow margin.

Formula

Rule of 40 Score = Revenue Growth % + Profit Margin %

A score of 40 or above suggests a healthy balance of growth and profitability. High-growth companies can afford lower margins, and vice versa.

Rule of 40 Score
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Enter values to calculate.

Growth rate
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Profit margin
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Passes Rule of 40?
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Tier
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Frequently asked questions

What is the Rule of 40?

A SaaS heuristic: if growth rate + profit margin ≥ 40, the business is balancing growth and profitability well.

Which margin should I use?

Most commonly EBITDA margin or free cash flow margin. Be consistent with your peers for comparison.

What if I am below 40?

It means you may be spending too much on growth without returns, or growing too slowly for your burn. Optimize one or both.

Do public SaaS companies pass?

About half of public SaaS companies score above 40. Top performers like Datadog and CrowdStrike score 60+.