Intelligent Octopus Go vs Go Max: 9.9p or 6.5p?
Octopus now lists two variable Intelligent Octopus Go versions. Here are the London rates, the break-even point and who each one suits.
- Checked 9 November 2026
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Quick answer
The Octopus Energy referral code is sepia-star-913: open https://share.octopus.energy/sepia-star-913 to use it. £50 credit each for a home, £75 for a business or charity (checked 9 November 2026). There's no code box at sign-up: the code is the end of the link, so open the link before you get a quote.
Two variable versions: on 9 November 2026, Octopus's public price data listed Intelligent Octopus Go at 9.90p/kWh off-peak with a 34.16p/kWh day rate, and Intelligent Octopus Go Max at 6.50p/kWh off-peak with a 38.27p/kWh day rate (London, same 42.56p/day standing charge, no exit fee).
Which is cheaper? Max wins only if more than about 55% of your electricity is used at the off-peak rate (smart charging plus the 23:30–05:30 window). Mostly-EV homes that shift appliances overnight usually clear that; lighter users may not.
Check with Octopus: its own page still advertises "from only 6.5p/kWh", so confirm which version your quote shows before you switch.
What changed
Until the start of November, Octopus's price data listed one variable Intelligent Octopus Go version at 6.50p/kWh off-peak. By 9 November 2026 that product was named "Intelligent Octopus Go Max", and a new variable product called "Intelligent Octopus Go" had appeared with a higher off-peak rate and a lower day rate. Octopus's Intelligent Octopus Go page also now compares the tariff with "Flexible Max" for heavy drivers. Octopus hasn't explained the change on the pages we checked, so treat this page as a dated reading of its price data.
| Version | Off-peak / day / standing charge |
|---|---|
| Intelligent Octopus Go, variable (from 5 Nov 2026) | 9.90p / 34.16p / 42.56p per day |
| Intelligent Octopus Go Max, variable (from 29 Oct 2026) | 6.50p / 38.27p / 42.56p per day |
| Intelligent Octopus Go 12-month fixed (from 27 Oct 2026) | 7.90p / 38.89p / 42.56p per day, £50 exit fee |
Which one suits you?
The two versions have the same standing charge, so the choice is about the balance between the off-peak and day rate. Max saves 3.4p on every off-peak kWh but costs 4.12p more on every day-rate kWh. They break even when about 55% of your kWh are off-peak.
| Share of use at off-peak rate | Intelligent Octopus Go (9.90p) | Max (6.50p) | Cheaper |
|---|---|---|---|
| 40% | £734 | £767 | Standard by £33 |
| 55% | £624 | £624 | Max by £1 |
| 70% | £515 | £481 | Max by £34 |
| 85% | £406 | £338 | Max by £68 |
- EV-heavy home: if most of your electricity is car charging and overnight appliances, you're likely above the break-even share, so Max tends to suit.
- Light overnight use: if you charge occasionally and run most of the house in the day, the 9.90p version's lower day rate tends to suit.
- Want certainty: the 12-month fixed version trades a higher off-peak rate (7.90p) for a fixed price and a £50 exit fee.
What to do next
- Check your car or charger on the compatible cars and chargers page and Octopus's own checker.
- Switch to Octopus with the referral link
share.octopus.energy/for £50 credit (£75 for a business).sepia-star-913 - Once your smart meter is connected, move to Intelligent Octopus Go in the app and compare the rates it shows against this page.
Full tariff guide: Intelligent Octopus Go: how it works, rates and eligibility. Referral steps: Intelligent Octopus Go referral link.
Questions
What is the difference between Intelligent Octopus Go and Intelligent Octopus Go Max?
On 9 November 2026, Octopus's public price data listed two variable versions in the London region: "Intelligent Octopus Go" (from 5 November 2026) with a 9.90p/kWh off-peak rate and a 34.16p/kWh day rate, and "Intelligent Octopus Go Max" (from 29 October 2026) with 6.50p/kWh off-peak and 38.27p/kWh day. Both have a 42.56p/day standing charge and no exit fee.
Which Intelligent Octopus Go version is cheaper?
It depends on how much of your electricity is off-peak. Using the London rates above and ignoring standing charges (which are identical), Max works out cheaper once more than about 55% of your electricity use is at the off-peak rate. Below that, the 9.90p version is cheaper.
Is the 6.5p rate still available?
Octopus's own Intelligent Octopus Go page still said "from only 6.5p/kWh" on 9 November 2026, and its price data still lists the 6.50p version, now named "Max". We can't see which version Octopus offers to each new customer, so get a quote on octopus.energy.
Are the rates the same in every region?
No. Octopus says day rates and standing charges vary by region; the figures here are for London.
What about the 12-month fixed version?
On 9 November 2026 the 12-month fixed version listed 7.90p/kWh off-peak, 38.89p/kWh day and a £50 exit fee (London). There is also an "EV Saver" 12-month fixed version at 6.90p/kWh off-peak aimed at Octopus Electric Vehicles lease customers; check eligibility with Octopus.
Do I need a different referral link for Max?
The Octopus Energy referral code is sepia-star-913: open https://share.octopus.energy/sepia-star-913 to use it. £50 credit each for a home, £75 for a business or charity (checked 9 November 2026). There's no code box at sign-up: open the link before you get a quote and sign up online. Forgot the link? Octopus says you can tell it the code afterwards, as long as you signed up directly on its website. Octopus switches new customers to Flexible Octopus first, then you move to an Intelligent Octopus Go version in the app once your smart meter is connected.
← Back to EV tariff hub How to use the Octopus Energy referral code
Switching to Octopus Energy? Get £50 credit with this referral link
Or copy the link to open later:
share.octopus.energy/sepia-star-913