Download our calculator

Last reviewed:

Please click to download the Thames Water DAD calculator 2018-19 V1.0.xlsm (last updated: 6 Feb 2018).

Please check back regularly to ensure you’re using the latest version of this tool.

We’ve designed this calculator to help you easily estimate our financial contribution towards new water mains and sewers (the income offset or asset payment). It’s a Microsoft Excel-based tool which contains macros, and has been designed to run on a desktop or laptop computer running Excel 2010, or later, on Windows 7, or later. It isn’t compatible with mobile devices. We don’t collect any data that you enter into this calculator – it’s purely for your use in creating estimates.

We’ve virus-scanned this file using ESET Smart Security (product version 10.1.235.0 with the virus signature database up to date) but please follow your standard security procedures when downloading from the internet.

This is intended to be a self-service tool to help you with estimating your charges, so please don’t send this file to us. The tool has built-in instructions and tips to help you use it, but if you have any questions or encounter any issues please do contact us quoting ‘DAD calculator’.