Imagine a SaaS entrepreneur looking out over a flat dashboard of lead metrics, her team fatigued, and her marketing spend in the crosshairs of investors screaming for return. She understands that her product is upending the market, yet her marketing initiatives are a disjointed series of campaigns disconnected from the company's vision. This is the dilemma for most B2B and SaaS growth-stage business owners, with the need to scale muddying the reluctance to adopt a strategic, high-impact fractional CMO content marketing strategy. A fractional CMO is the solution, offering C-level strategy without the cost of an in-house full-time executive. How do you, however, prove the return on investment of an off-the-clock marketing executive in a results-driven world? This article presents a straightforward formula to calculate the ROI of a fractional CMO, which will allow CEOs, CMOs, and founders to be able to quantify performance and attain sustainable growth.