Metrics & Performance
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Quick Answer
A SaaS benchmark where a company's revenue growth rate plus profit margin should exceed 40%. Companies above 40% are considered well-balanced between growth and profitability.
Rule of 40 Score
Rule of 40 = Revenue Growth Rate (%) + Profit Margin (%)
Where
The Rule of 40 is a widely used benchmark for evaluating SaaS company performance. It states that a healthy SaaS business should have its revenue growth rate plus profit margin equal to or exceed 40%. Formula: Revenue Growth % + Profit Margin % ≥ 40. For example: a company growing 60% with -10% margins scores 50 (good). A company growing 20% with 25% margins scores 45 (good). A company growing 15% with 10% margins scores 25 (concerning). The metric acknowledges that high-growth companies can sacrifice profitability, and slower-growth companies should compensate with stronger margins. Originally popularized by Brad Feld and venture investor Bain, the Rule of 40 has become a standard evaluation framework used by growth equity investors, public market analysts, and boards of directors.
What good looks like
Why It Matters
The Rule of 40 gives founders and investors a simple health check that balances two often-competing priorities: growth and profitability. It's particularly relevant for SaaS companies approaching or past Series B, where investors expect a credible path to sustainable economics. Public SaaS companies trading above the Rule of 40 command premium valuations — Datadog (score: 70+) trades at 20x+ revenue while companies below 40 trade at 5-8x.
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The Rule of 40 is a widely used benchmark for evaluating SaaS company performance. It states that a healthy SaaS business should have its revenue growth rate plus profit margin equal to or exceed 40%. Formula: Revenue Growth % + Profit Margin % ≥ 40.
Understanding Rule of 40 is critical for founders navigating the fundraising process. It directly impacts deal terms, valuation, and the relationship between founders and investors.
Rule of 40 falls under the metrics category in venture capital. This area covers concepts related to the quantitative measures used to evaluate fund and company performance.
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