The Rule of 40 is a software industry benchmark stating that a healthy SaaS company's combined growth rate and profit margin should equal or exceed 40%.
Essential for navigating early-stage business execution; mastering Rule of 40 allows founding teams to scale operations, manage risk, and optimize efficiency for late-stage growth efficiency audits and public listing planning.
The Rule of 40 is a key benchmark for mature SaaS companies. It recognizes that growth and profitability can be traded off: a startup growing at 80% can afford to run a -40% cash margin, while a slow-growing company (e.g., 10%) must generate strong profit margins (e.g., 30%) to remain healthy.
Typically, YoY Revenue Growth Rate % + EBITDA Margin % (or Free Cash Flow Margin %).
It is primarily used by late-stage venture capitalists, private equity firms, and public markets to evaluate growth-profit trade-offs.
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