Free
Informational tool, not legal advice. Band rate defaults are editable estimates from published 2026 tariff tables — always confirm the exact figure with your own bill or DisCo.

1. Log your real supply hours

Enter how many hours of electricity you actually got each of the last 7 days. Leave a day blank if you didn't track it.

2. Your billing details

Copy these from your latest bill. The rate fields are pre-filled with typical 2026 defaults — edit them if your bill shows a different figure.

Optional — leave blank to use the typical default for that band.