This document provides guidance on creating a business case for accessibility. It explains that a business case evaluates the benefits, costs, and risks of options to help decision making. A successful business case is aligned with business strategy, demonstrates clear overall benefits to the organization, and is backed by evidence with executive support. The document cites data showing the size of the disability market and references research reports highlighting the costs of inaccessibility and benefits of accessibility such as increased customers, spending, and reputation as well as reduced costs. It emphasizes using data and stories to engage executives and considering everyone's motivations.