Discover Octopus Go 12M Fixed, the popular smart tariff designed for electric vehicle owners in 2026, offering incredibly cheap electricity rates every night for EV charging and other household use. This fixed-rate plan provides price stability for 12 months.
Are you an electric vehicle (EV) owner in the UK looking to dramatically reduce your charging costs and gain price certainty for the year ahead? Then Octopus Go 12M Fixed could be the perfect energy tariff for you in 2026. Designed specifically with EV drivers in mind, this innovative smart tariff from Octopus Energy offers a fantastic solution for powering your car – and your home – with super cheap electricity during off-peak hours.
Octopus Energy is renowned for its commitment to fair pricing, excellent customer service, and innovative tariffs that cater to modern energy usage patterns. The Octopus Go 12M Fixed tariff is a prime example, providing a fixed-rate structure for 12 months, giving you peace of mind against fluctuating energy prices.
Octopus Go 12M Fixed is a smart, time-of-use tariff that provides a significantly cheaper electricity rate during a dedicated overnight window, alongside a standard daytime rate. As the name suggests, the unit rates and standing charges are fixed for a full 12 months from the start of your contract, offering stability in your energy bills.
The core feature of this tariff is its incredibly low off-peak electricity rate, available between 00:30 and 05:30 every single night. This five-hour window is specifically designed to allow EV drivers to charge their vehicles when demand on the grid is lowest, but it's also perfect for running other high-consumption appliances like washing machines, dishwashers, and tumble dryers on a timer.
To be eligible for Octopus Go 12M Fixed, you will need a working smart meter that sends half-hourly readings to Octopus Energy. This ensures accurate billing for your different usage periods.
This tariff is a game-changer for specific types of households:
This is the primary target audience. If you own an EV and can reliably plug it in overnight, the savings on charging alone can be substantial. Imagine waking up to a fully charged car for a fraction of the cost of standard tariffs.
Beyond EVs, if you have other appliances that can be timed to run overnight, such as storage heaters, washing machines, dishwashers, or even charging other devices, you can benefit significantly from the cheaper rates.
The 12-month fixed term means your unit rates and standing charges won't change, providing predictability in your energy budget, which is invaluable in today's energy market.
As a smart tariff, it requires a smart meter to function correctly. If you don't have one, Octopus Energy can often arrange for a free installation.
The headline benefit. Charge your electric car for significantly less than on a standard tariff, making EV ownership even more cost-effective.
Enjoy peace of mind knowing your electricity rates and standing charges are locked in for a full year, protecting you from potential price rises.
It's not just for your car! Shift other high-energy activities like laundry or dishwashing to the off-peak window to save even more on your household bills.
By charging your EV overnight, you're helping to balance demand on the national grid, making better use of renewable energy sources which often generate electricity during off-peak hours.
Octopus Energy is consistently praised for its outstanding customer support, making your energy experience smooth and hassle-free.
While Octopus Go 12M Fixed offers fantastic value, it's important to be aware of its characteristics:
To compensate for the cheap overnight rate, the daytime electricity rate is typically higher than on a standard single-rate tariff. This means if you use a lot of electricity during the day and can't shift your usage, this tariff might not be the best fit.
To truly maximise savings, you need to be disciplined about timing your EV charging and other appliance usage within the 00:30 - 05:30 window.
The Octopus Go 12M Fixed tariff comes with a £50 exit fee if you decide to leave the tariff before your 12-month contract is up. This is a common feature of fixed-rate tariffs and should be factored into your decision.
Without a functioning smart meter that sends half-hourly readings, you won't be able to access this tariff.
Please note that electricity unit rates and standing charges for Octopus Go 12M Fixed vary depending on your specific region in the UK. As an expert energy writer, I cannot provide real-time, personalised rates here. To get an accurate quote tailored to your postcode for 2026, we highly recommend visiting the Octopus Energy website directly and entering your details. They will provide transparent pricing for both the off-peak and peak periods, as well as the daily standing charge applicable to your area.
When considering Octopus Go 12M Fixed, don't just look at the low overnight rate in isolation. It's crucial to:
If Octopus Go 12M Fixed sounds like the ideal tariff to power your EV and save on your household electricity bills in 2026, making the switch to Octopus Energy is straightforward. Their award-winning customer service team will handle everything for you.
Join the thousands of happy Octopus Energy customers today and start enjoying smarter, greener, and often cheaper energy. Plus, as a thank you for using our referral, you'll receive a £50 credit to your new Octopus Energy account!
Ready to make the switch and save? Join Octopus Energy today and get £50 credit when you sign up using our referral link: https://share.octopus.energy/wise-peach-776
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Use our referral link and get £50 credit added to your Octopus account when you switch.
Get £50 & Switch Now →| Product Code | GO-FIX-12M-26-10-14 |
| Type | Fixed |
| Green | ❌ No |
| Tracker | ❌ No |
| Prepay | ❌ No |
| Available from | Oct 2026 |
| Status | ✅ Active |
Real people saving real money with Octopus Energy