The Data Behind the Rule of 40%
In “The Rule of 40% for a Healthy SaaS Company,” Brad Feld shared a simple rule of thumb growth investors often apply to judge the attractiveness of a $50M business. “The 40% rule is that your growth rate + your profit should add up to 40%.”
I was curious if this theory were broadly true, applicable for growth stage companies Brad mentioned, but also early stage companies. So, I calculated this metric, which I’ll call the GP metric in this post, for all the publicly traded SaaS companies over their lifetimes.






