Rule of 40
The Rule of 40 is the SaaS valuation framework stating that revenue growth rate plus profit margin should equal at least 40% — providing a unified measure balancing growth and profitability that has become a key benchmark for SaaS company quality assessment.
Why This Matters
Rule of 40 elegantly balances the growth-versus-profitability tradeoff in SaaS. A company growing 60% with -20% profit margin meets the rule (60 - 20 = 40). A company growing 20% with 20% profit margin also meets it. Either profile is considered healthy from valuation perspective. Companies below the rule (e.g., 30% growth at -20% margin = 10) face valuation pressure. Investors increasingly use Rule of 40 as benchmark for SaaS company quality, with elite companies achieving Rule of 50 or 60. The framework provides organizational discipline balancing growth investment with sustainable economics.
Frequently Asked Questions
Frequently Asked Questions
What Rule of 40 score is healthy?
Above 40 is healthy. Above 50 is strong. Above 60 is best-in-class. Below 30 typically faces valuation pressure. The framework allows different growth-vs-profitability mixes — high growth at low margin or moderate growth at high margin both can meet the rule.
Does Rule of 40 apply to non-SaaS B2B?
Originally developed for SaaS valuation context but broader B2B applications increasingly use the framework. Different industries may have adjusted benchmarks (Rule of 30 for slower-growth segments, Rule of 50 for premium growth segments). The underlying balance principle applies broadly.