Planning tool
Cosy Octopus heat pump running cost calculator
Estimate a year of heat pump running costs on Cosy Octopus against Flexible Octopus, using today’s Cosy bands for your region.
Today’s Cosy bands in London
| Time | Price per kWh |
|---|---|
| 00:00–04:00 | 28.80p |
| 04:00–07:00 | 14.12p |
| 07:00–13:00 | 28.80p |
| 13:00–16:00 | 14.12p |
| 16:00–19:00 | 43.19p |
| 19:00–22:00 | 28.80p |
| 22:00–24:00 | 14.12p |
Standing charge 42.29p a day. Times are UK clock time.
Your estimate
- Cosy Octopus
- £1,712.92 a year
- Flexible Octopus
- £1,879.78 a year
Cosy is about £166.86 a year cheaper on these assumptions.
Rates used: cheap 14.12p, standard 28.80p, peak 43.19p per kWh.
Choosing your shares
Heat pumps that pre-heat the house and the hot-water cylinder during the cheap periods, and ease off during the peak, get the most from Cosy. If your heat pump runs evenly all day, set the cheap share to roughly the fraction of the day the cheap bands cover. Your heat pump’s app or a separate meter can show its real yearly use.
What the estimate leaves out
This is an estimate, not a quote. It applies today’s Cosy and Flexible prices to a whole year, so it does not follow price changes or seasonal differences in when your heat pump runs. Cosy eligibility depends on your heating system: check with Octopus. Read the heat pump tariff guide or compare Cosy vs Agile.