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Rule of 40
A benchmark stating that a SaaS company's growth rate plus profit margin should equal or exceed 40% to be considered healthy.
Formula
Rule of 40 Score = Revenue Growth Rate (%) + Profit Margin (%)
Profit Margin can be EBITDA margin, operating margin, or free cash flow margin
Target: Score ≥ 40
Definition
What is the Rule of 40?
The Rule of 40 states that a healthy SaaS company's growth rate plus profit margin should equal or exceed 40%. It's a balancing test that allows for different strategies while ensuring overall efficiency.
A company growing 50% with -10% margins scores 40. A company growing 20% with 20% margins also scores 40. Both are considered healthy by this benchmark.
Why the Rule of 40 Matters
The Rule of 40 acknowledges that growth and profitability are trade-offs. Young companies sacrifice profits for growth. Mature companies sacrifice growth for profits. This metric lets you compare them fairly.
Investors use it as a quick health check. Companies consistently above 40 command premium valuations. Those below 40 face harder questions about their path to efficiency.
Rule of 40 Benchmarks
Below 20: Struggling. Neither growing fast nor profitable. 20-40: Acceptable. Room for improvement. 40-60: Healthy. Well-balanced business. Above 60: Elite. Top-tier SaaS performance.
Example
Company A (Growth-focused):
- Revenue growth: 60%
- Profit margin: -15%
- Rule of 40 score: 60 + (-15) = 45 ✓
Company B (Profitable):
- Revenue growth: 20%
- Profit margin: 25%
- Rule of 40 score: 20 + 25 = 45 ✓
Both pass. Different strategies, same efficiency outcome.
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