Q&A: the Rule of 40 in the valuation scheme

Q: Ayman, can you explain or give insights on "Rule of 40" in the valuation scheme?

A: The Rule of 40 is frequently cited as a key benchmark for evaluating hypergrowth companies, particularly in the SaaS and tech sectors. It suggests that a company’s growth rate plus profit margin should equal or exceed 40%. In theory (or the thesis behind it), this balance signals a healthy blend of growth and profitability.

For example, a company growing at 50% with a -10% profit margin would meet the Rule of 40, as would another growing at 20% with a 20% profit margin. It is a resilient assessment for companies at different stages of their lifecycle, from aggressive growth phases to more mature, profit-focused operations.

One of the more strategic uses of the Rule of 40 is its application in justifying a premium to the Enterprise Value (EV) multiple. In high-growth sectors, companies meeting or exceeding the Rule of 40 often command higher valuation multiples.

For example, consider two SaaS companies:

• Company A: Growth rate of 30% and profit margin of 15% (Rule of 40 = 45)
• Company B: Growth rate of 25% and profit margin of 5% (Rule of 40 = 30)

Company A not only meets but exceeds the Rule of 40, potentially justifying a higher EV/Sales multiple. If the industry average EV/Sales multiple is 10x, Company A might attract a 12x multiple, reflecting its superior growth-profitability balance. Meanwhile, Company B might be valued closer to the industry average or even at a discount.

Sometimes, to quantify the premium, we bring the result of the rule of 40, divide it by 40, and this becomes the amount of premium.

For example for company A:

• The EV/Sales=10x,
• Premium =Rule of 40/40 = 45/40 = 1.125
• New EV/sales = 10x * 1.125= 11.25x

While the Rule of 40 is useful for quick benchmarking, it is essential to approach it with a critical perspective:

• Lack of Quantitative Depth: The Rule of 40 offers a quick snapshot but lacks the quantitative rigor required for thorough financial analysis. It does not account for cash flow, operational efficiency, or capital structure.
• Valuation Distortion: The premium applied to EV multiples can create a distorted view of valuation, especially in bull markets where growth is heavily rewarded, potentially leading to overvaluations.
• Context Matters: The relevance of the Rule of 40 varies by industry and company maturity. A 20% growth rate may be impressive for a mature firm but unimpressive for an early-stage startup.

While the Rule of 40 provides a convenient shorthand for evaluating growth companies, it should not be the sole basis for investment decisions.