Last Updated on July 24, 2026
£50 credit for each side
£100m paid out over 8 years
7.7M household customers
UK’s no.1 electricity supplier
The move
Energy is a category people actively dislike. Nobody recommends their supplier at dinner parties. Octopus Energy decided that was exactly the opportunity, and built its growth engine on the least glamorous mechanic in marketing: a referral link.
The deal is simple. Refer a friend, and you both get £50 of credit (£75 each for business referrals). There is no cap. Some customers have referred dozens of people. By April 2024, Octopus announced it had paid out nearly £100 million in referral credits over roughly eight years, and it framed the number exactly the way you would hope: money it would rather give to customers than spend on advertising or hand to price-comparison sites.
The same announcement put Octopus at 7.7 million household customers, and Ofgem figures confirmed it as the UK’s largest electricity supplier. Kantar analysis credits around 2.6 million customers, roughly five points of market share, to organic growth since the end of 2021. By 2025, nearly 40% of consumers said they had heard good things about Octopus.
Why it worked
Referral schemes are everywhere and most of them are wallpaper. The Octopus version worked for two reasons that have nothing to do with the £50.
First, the product deserves the recommendation. Octopus won Which? Recommended Provider seven years running. Referrals are a multiplier on satisfaction, not a substitute for it. A referral scheme bolted onto mediocre service just pays people to spread indifference.
Second, the incentive is two-sided and framed honestly. Both people get the same £50, so recommending a friend never feels like taking a commission off them. And Octopus tells customers openly that the scheme is their ad budget redirected. That transparency turns a promotion into a shared arrangement: help us skip the middlemen and we will split the savings with you.
The principle
Word of mouth is not a happy accident to hope for. It is a channel you can build, budget for and measure. The question is not whether people would recommend you, it is whether you have made recommending you easy, rewarding and fair for both sides.
Steal this
A referral engine is one of the few marketing systems that gets cheaper per customer as it grows. Here is the small business version.
Earn it first. Check your reviews, your complaints, your repeat rate. If customers are not already happy, fix that before paying for referrals, or you will amplify the wrong message.
Make the reward two-sided and equal. £20 off for the new customer and £20 for the referrer feels fair. One-sided schemes feel like asking friends to monetise each other, and people quietly refuse.
Fund it from your ad budget and say so. ‘We would rather give this to you than to Facebook’ is an honest, likeable line, and it reframes the reward as a shared win rather than a bribe.
Remove every ounce of friction. A personal link or a simple ‘mention Sarah sent you’ beats forms and codes. Ask at the moment of delight: right after a five-star review, a completed job or a compliment.
Sources & further reading
- Octopus hands out £100m to customers in referral payments · Octopus Energy
- How Octopus achieved stunning growth · Kantar
- How Octopus referrals work · Octopus Energy
The Whito verdict
Octopus turned the most boring mechanic in marketing into £100 million of customer goodwill and the UK’s largest electricity customer base. The trick was never the £50. It was a product worth recommending, a fair two-sided deal, and the honesty to say ‘this is our ad budget, you have it instead’.
Most small businesses have happier customers than Octopus and no referral system at all. That gap is free money being left on the table every week.
Build Stage
Could referrals grow your business?
Get a free Growth Report and find out whether a referral system is the cheapest growth channel you are not using.
Frequently asked questions
How does the Octopus Energy referral scheme work?
Existing customers share a personal link, and when a friend switches, both sides receive £50 of energy credit (£75 each for business referrals), with no cap on how many people you can refer. By April 2024 Octopus had paid out nearly £100 million in referral credits over roughly eight years.
Did referrals really drive Octopus Energy’s growth?
Octopus has never published an exact percentage, but the verifiable markers are strong: £100m paid in referral credits, 7.7 million household customers by April 2024, Ofgem confirming it as the UK’s largest electricity supplier, and Kantar crediting around 2.6 million customers to organic growth since late 2021.
How can a small business build a referral scheme like Octopus?
Make sure the service is worth recommending first, then offer an equal two-sided reward, fund it from your advertising budget and say so openly, and remove friction: a simple link or ‘mention my name’ beats codes and forms. Ask at the moment customers are happiest.
