Tools · Capital Efficiency
The Rule of 40, without false equivalence.
An analyzer for software growth and profitability trade-offs. It plots your performance on the 2D frontier, estimates implied valuation multiple adjustments, and exposes why equal numerical scores do not create equal enterprise value.
Rule of 40 & Capital Efficiency Analyzer
Analyze the trade-off between top-line revenue growth and profit margin. Map your position against the Rule of 40 frontier, evaluate implied valuation multiple impact, and identify your required operational trade-offs.
Company Profiles (Presets)
€
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FCF accounts for working capital and capex without distorting for stock-based compensation (SBC).
Rule of 40 Score & Valuation
Combined Rule of 40 Score
44.0%
Passing Frontier
Implied Multiple Impact
+15% Premium
Relative to SaaS index median Required Margin at Current Growth
12.0%
Margin required for 40% at current growth Required Growth at Current Margin
24.0%
Growth required for 40% at current margin Annual Profit / Cash Flow (€)
+€4,000,000
FCF at 16.0% margin 2D Growth & Profitability Frontier
Sensitivity Matrix: Growth vs Margin
| Growth \ Margin | -20% | -10% | 0% | +10% | +20% | +30% |
|---|
Methodological Boundary
What this instrument is built on
The analytical framework draws on corporate finance, valuation theory, and empirical software benchmarks:
- Michael J. Mauboussin (2014): Capital allocation, return on invested capital (ROIC), and the growth-reinvestment trade-off.
- Brad Feld (Foundry Group, 2015): The operating heuristic of the 40% rule for software companies.
- Bessemer Venture Partners & KeyBanc Capital Markets: Empirical SaaS benchmarks, multiple expansion regressions, and cash flow durability.
- Koller, Goedhart and Wessels (McKinsey & Company): Valuation and the fundamental driver of enterprise value (ROIC vs. growth).
Related journal routes & concepts
The analyzer is an active instrument. The following articles examine cost boundaries, capital efficiency, and unit economics: