Compare tariffs with your smart meter data

Use your own half-hourly readings to see whether a tariff with a cheaper period would have suited you.

Your half-hourly electricity use (CSV file)

Download it from your supplier's app or website, or a smart-meter data service. It needs a start-time column and a kWh column. The file is read on your device and is not uploaded.

Tariff A: single rate

The price cap for your region, unless you enter your own rates.

Region

Unit rate (p/kWh)Cap: 26.32p

Standing charge (p/day)Cap: 54.83p

Tariff B: with a cheaper period

Cheap rate (p/kWh)

Other times (p/kWh)

Cheap fromUntil

Standing charge (p/day)

Choose a CSV file to see what your own use would have cost.

No data file? Use the simple tariff calculator →