CISOs already know that cybersecurity is a core competency of their businesses. Other executive leaders may not. This is often in part because security leaders failed to highlight how many externalities force security spending. Those externalities include customers, cyberinsurers, and regulators. This report introduces a new Forrester methodology that demonstrates how cybersecurity spending directly impacts revenue. Security leaders can use it to defend their security budgets to the board, C-suite, and other stakeholders.