It's a financial framework that measures revenue growth vs profit margins. The Rule of 40 determines the health and/or attractiveness of your business. To CFO’s, it adds financial discipline to your decision-making process.
How to Calculate the Rule of 40
Rule of 40 = growth % + profit margin
If revenue growth is 15%
and profit margin is 20%
Your rule of 40 number is 35%
Can you have negative inputs? Yes, that’s the meaning of the Rule of 40.