Octopus Cosy UK Tariff (2026) is a time-of-use electricity plan tailored for heat pump and battery storage users in the United Kingdom. This tariff, offered by Octopus Energy, offers significant savings to those who can align their energy consumption with off-peak hours. The Off-Peak rate ranges from 12p to 15p per kWh during specific windows, while the Peak rate fluctuates between 35p and 50p per kWh at other times. By optimising usage during cheaper periods-such as 04:00-07:00, 13:00-16:00, and 22:00-00:00-customers can potentially save up to £500 annually compared to standard tariffs.
verage £125-£300 additional annual saving vs the tariff alone.
- Octopus Cosy + EV smart charger - schedule overnight charging. EV owners save £400-£800/year on this combo vs Standard Variable Tariff.
- Octopus Cosy + heat pump + battery - full-stack low-carbon home setup. Average £700-£1,500/year savings vs gas heating + standard electricity.
Related guides
Sources
- Octopus Energy published tariff page (most recent rates)
- Ofgem Time-of-Use Tariff Database
- Energy UK consumer trends report (2026)
