The Rule of 40 Calculator benchmarks the operating health of software companies by measuring the trade-off between growth velocity and profitability. It states that a healthy software company’s annual revenue growth rate plus its profit margin should satisfy or exceed 40%.

Mathematical Formula

Rule of 40 Score (%) = Revenue Growth Rate (%) + Profit Margin (%)

How Different Profiles Satisfy the Rule

  • High Growth Profile: 60% YoY Revenue Growth + (-15% Free Cash Flow Margin) = 45% (Meets Rule).
  • Balanced Profile: 30% YoY Revenue Growth + 15% Free Cash Flow Margin = 45% (Meets Rule).
  • Mature Cash Cow Profile: 15% YoY Revenue Growth + 30% Free Cash Flow Margin = 45% (Meets Rule).

Frequently Asked Questions (FAQ)

Can an unprofitable startup satisfy the Rule of 40?

Yes. An early-stage startup burning cash with a -20% margin is in great shape if it is growing revenue at 70%+ YoY (Score = 50%).

When does the Rule of 40 become relevant?

It is typically enforced once a company reaches scale—usually between $5M and $10M+ in Annual Recurring Revenue (ARR).