Plans for sanitation improvements often stall at an early stage due to the challenge of costing different sanitation options, leaving low-income communities without improved sanitation. To address this need, WSUP, IWA and local partners have developed a financial tool which helps planners get a preliminary understanding of the affordability of different sanitation improvement strategies.

This Topic Brief describes the development of the prototype tool, how it works, its practical application in two wards of Dhaka and the results it produced. Ways in which the tool could be improved are noted, and the Topic Brief ends with a discussion of the tool’s potential wider applications.