Claim £100 when you book a Cosy Heat Pump installation through Octopus Energy using an official referral link. The reward lands after install completes – as a gift card or account credit – and it stacks with the government’s Boiler Upgrade Scheme (BUS), which can take up to £7,500 off your install quote directly.
If you’re considering swapping a gas, oil or LPG boiler for an air source heat pump, this guide explains how the £100 referral works, what’s included in an Octopus install, how it combines with the BUS grant, and what eligibility looks like. Last updated: June 2026.
Octopus Energy installs air source heat pumps under their Cosy Heat Pump service, which combines a heat pump install with an optional electricity tariff (Cosy Octopus) optimised for heat-pump usage patterns. The referral programme is part of Octopus’s tech-referrals scheme – the same system used for solar and EV charger referrals.
There’s no code to copy and paste. You start your enquiry via an official referral link and the £100 reward is attached to your application automatically. You don’t pay anything extra to use the referral, and it doesn’t reduce the install quote you’re shown – it lands after install completes, typically as a gift card or as a credit applied to your Octopus account.
You can read more about how Octopus referrals work in our guide to whether the Octopus referral scheme is legit, and how long credits typically take in how long the £50 referral credit takes (timing for the heat pump credit is similar – a few weeks after installation).
This is the big one. The Boiler Upgrade Scheme is a UK government grant of up to £7,500 for air source or ground source heat pumps in England and Wales. Octopus handle the BUS paperwork for you when you install a Cosy Heat Pump – you don’t have to apply separately.
The £100 referral reward is separate from the BUS grant. You can claim:
Combined effect: a typical £14k Cosy Heat Pump install can drop to around £6,400 net of grant, plus £100 back after completion. The referral is small relative to BUS, but it’s free money on top.
Booking through Octopus is a complete bundled install. A typical installation includes:
The £100 referral stacks on top of all of that.
Short answer: usually yes, once the heat pump is installed. The Cosy Octopus tariff is an electricity tariff with three cheaper ‘cosy’ windows (early morning, midday, evening) designed around heat-pump load patterns. It’s not mandatory, and the £100 referral pays regardless of which electricity tariff you’re on after install.
But running a heat pump on a standard variable tariff means paying peak rates during the hours your pump is working hardest. The Cosy Octopus windows typically cut running costs significantly versus standard variable – similar to how Intelligent Octopus Go structures cheap windows around overnight EV charging.
Octopus confirm your home is suitable during their survey. Typical eligibility:
You do not need to be an existing Octopus Energy customer to claim the £100 heat pump referral – the Cosy Heat Pump install is a separate service. If you also want to switch your electricity supply to Octopus, the £50 switch referral is a separate offer that stacks.
Yes. Octopus runs several independent referral schemes you can stack:
Each is a different programme with its own link, and they don’t conflict.
The Octopus heat pump referral code is one of the easiest extras to claim before booking a Cosy Heat Pump install: £100 reward on top of a fully bundled installation, BUS grant paperwork handled for you, and MCS certification included. There’s no code to remember – just start your enquiry through an official referral link and the credit tracks itself.
£100 paid as a gift card or account credit when you complete a Cosy Heat Pump installation booked through Octopus via an official referral link.
Yes. The BUS grant of up to £7,500 reduces your install quote directly, while the £100 referral is a separate post-install reward. Both apply to the same installation, and Octopus handle the BUS paperwork for you.
No. The £100 referral is paid regardless of which electricity tariff you’re on after install. The Cosy Octopus tariff is optional but typically saves money on heat-pump running costs.
Yes. You don’t need to be an existing Octopus electricity customer to install a Cosy Heat Pump or to claim the £100 referral. The £50 switch referral is a separate offer that stacks.
Octopus’s survey tells you upfront. There’s no charge for the survey if you decide not to proceed, and no obligation. If you need insulation or radiator upgrades first, Octopus can quote for those separately.
Most referrals are credited within a few weeks of installation completion. If yours hasn’t arrived after 8 weeks, contact Octopus support with your installation date and the referral link used.
Disclaimer: Octopus Energy Cash is an independent website and is not affiliated with, endorsed by, or operated by Octopus Energy Ltd. ‘Octopus Energy’ is a trademark of its respective owner. Referral reward amounts and scheme terms are set by Octopus and may change without notice; always confirm the current offer on the official Octopus Energy website before booking. We explain how we make money on our disclosure page.
