Download our calculators

We’ve designed two calculators to help you easily estimate our financial contribution towards new water mains and sewers (the income offset or asset payment). They’re Microsoft Excel-based tools which contain macros, and have been designed to run on a desktop or laptop computer running Excel 2010, or later, on Windows 7, or later. They aren’t compatible with mobile devices. We don’t collect any data that you enter into these calculators – they’re purely for your use in creating estimates.

We’ve virus-scanned these files using ESET Smart Security (produce version with the virus signature database up to date) but please follow your standards security procedures when downloading from the internet.

These are intended to be self-service tools to help you with estimating your charges, so please don’t send these files to us. The tools have built-in instructions and tips to help you use them, but if you have any questions or encounter any issues please do contact us quoting ‘DAD calculator’.

2019/20 calculator

Our 2019/20 calculator uses the charges applicable from 1 April 2019.