SaaS Rule of 40 Health & Efficiency Calculator
Calculate your SaaS Rule of 40 score: Growth Rate % + Profit Margin %. Evaluate overall subscription performance and investor appeal.
Calculated Results
Rule of 40 Score
40%
Passes Rule of 40?
YES (Pass)
Rating: Healthy
About this tool
The Rule of 40 is the definitive financial heuristic used by late-stage venture capitalists, private equity funds, and public market software analysts to measure the overall operational excellence of a subscription software company. The rule states that a healthy SaaS business's year-over-year revenue growth rate percentage plus its profitability margin percentage (Free Cash Flow margin or EBITDA margin) should equal or exceed 40%. The metric elegantly accommodates different corporate life stages: an early-stage startup growing at 60% YoY with a -20% cash burn margin scores a 40%, just as a mature enterprise software giant growing at 15% with a 25% profit margin satisfies the rule. Scoring consistently above 40% correlates directly with premium valuation multiples. Use this tool to benchmark your Rule of 40 performance.
How It Works
- 1Input your Year-over-Year (YoY) revenue growth rate percentage.
- 2Input your operational profit margin percentage (Free Cash Flow Margin or EBITDA Margin).
- 3Inspect your composite Rule of 40 score, pass/fail status, and investor appeal grade.
Formula & Math
Transparent LogicRule of 40 Score (%) = YoY Revenue Growth Rate (%) + Profit Margin (%)
Worked Practical Example
A high-growth SaaS grows revenue by 50% year-over-year while operating at a -5% Free Cash Flow margin.
Calculation / Steps
50% + (-5%) = 45.0%
Expected Result
Score of 45.0% (Passes Rule of 40; top-tier operational efficiency).
Frequently Asked Questions
Which profit metric should be used for the Rule of 40?+
Free Cash Flow (FCF) margin is preferred by growth investors; EBITDA margin is commonly used in private equity and traditional finance.
Does the Rule of 40 apply to early-stage startups under $1M ARR?+
The Rule of 40 is most meaningful once a company scales past $5M to $10M ARR. For early-stage startups, pure growth rate and retention take precedence.
What is considered a world-class Rule of 40 score?+
Automate retention on your cancel button
BoolBul lifts both sides of your Rule of 40 score: it preserves top-line growth and reduces customer support and replacement costs.
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