Rutgers and Planned Parenthood Association Ghana have introduced a costing tool for civil society organisations implementing comprehensive sexuality education (CSE) programmes. This user-friendly, no-cost tool helps make CSE programmes more efficient, enabling organisations to maximize the impact of their existing budgets. It also generates graphs, charts, and policy briefs to demonstrate the value of CSE to governments and donors, showing how investment in CSE supports broader health and social objectives. Plus, it can support policy advocacy and planning for scaling up initiatives. The CSE Costing tool consists of the following files: 1) The CSE Costing Tool 1.0 with training data (XLSM file); 2) The Microsoft Publisher File for the Policy Brief Template; and 3) The User Manual.