Octopus Go 12M Fixed in 2026: Your Smart EV Tariff Guide

Octopus Go 12M Fixed: Powering Your EV and Savings in 2026

Are you an electric vehicle (EV) owner in the UK, or someone who uses a lot of electricity during the night? Then Octopus Go 12M Fixed could be the perfect energy tariff for you in 2026. Designed with smart charging in mind, this popular tariff from Octopus Energy offers significantly cheaper electricity during specific overnight hours, all locked in for a full year.

What is Octopus Go 12M Fixed?

Octopus Go 12M Fixed is a specialist smart tariff that provides a fixed price for your electricity and gas (if applicable) for 12 months, with a unique twist: incredibly low electricity rates during a dedicated off-peak window. Specifically, you'll benefit from super cheap electricity between 00:30 and 05:30 every single night. This five-hour period is perfectly timed for charging your EV while you sleep, or running other high-usage appliances like dishwashers, washing machines, or storage heaters.

As a 12-month fixed tariff, it means the unit rates for your electricity (both peak and off-peak) and gas, along with your standing charges, remain constant for a year from the date you switch. This provides valuable price certainty and protection against potential energy market fluctuations throughout 2026.

Who is Octopus Go 12M Fixed For?

This tariff is specifically tailored, but not exclusively limited, to certain households:

• Electric Vehicle Owners: This is the primary audience. The cheap overnight rates make charging your EV incredibly cost-effective, significantly reducing your transport fuel bills.
• Smart Meter Users: A smart meter (specifically a SMETS2 or an upgraded SMETS1) is essential for Octopus Go 12M Fixed, as it allows Octopus to track your half-hourly usage and apply the correct peak/off-peak rates.
• Households with High Overnight Usage: Even without an EV, if you can shift a significant portion of your electricity use to the 00:30-05:30 window (e.g., using timers for washing machines, tumble dryers, dishwashers, or having electric storage heaters), you could see substantial savings.
• Those Seeking Price Stability: The 12-month fixed term offers peace of mind, protecting you from potential price rises in the energy market for a full year.

Key Benefits of Octopus Go 12M Fixed

Choosing Octopus Go 12M Fixed in 2026 comes with a range of advantages:

• Significant Savings on EV Charging: Enjoy dramatically lower costs for powering your electric vehicle, making owning an EV even more economical.
• Fixed Prices for 12 Months: Gain financial predictability with unit rates and standing charges locked in for a year, shielding you from market volatility.
• Optimise Home Energy Use: Encourage smarter energy habits by using high-drain appliances during the cheaper off-peak window.
• Supports Renewable Energy: Charging during off-peak hours often aligns with periods of higher renewable energy generation, contributing to a greener grid.
• Award-Winning Customer Service: Benefit from Octopus Energy's renowned customer support, consistently rated highly by consumers.

Potential Drawbacks and Considerations

While highly beneficial for many, it's important to consider if Octopus Go 12M Fixed is right for your specific circumstances:

• Smart Meter Requirement: You must have a functioning smart meter. If you don't, Octopus Energy can usually install one for free.
• Higher Daytime Rates: To offer such low overnight rates, the daytime electricity rates on Octopus Go 12M Fixed are typically higher than a standard flexible tariff. If you use most of your electricity during peak daytime hours and can't shift usage, this tariff might not be the most cost-effective.
• Early Exit Fees: As a fixed tariff, there may be early exit fees if you decide to switch away before your 12-month contract ends. Always check the terms and conditions.

Current Rates for Octopus Go 12M Fixed (2026)

As of 2026, the standing charge for Octopus Go 12M Fixed is:

• Electricity Standing Charge: 44.40807p/day (inc VAT)

Please note that electricity unit rates (both off-peak and peak) and gas rates vary significantly based on your geographical location in the UK and the prevailing market conditions at the time you sign up. To get the most accurate and personalised quote for your home, including your specific unit rates, it's essential to visit the Octopus Energy website directly and enter your postcode.

Is Octopus Go 12M Fixed Right For You in 2026?

To determine if Octopus Go 12M Fixed is your ideal tariff, consider your energy consumption habits. If you own an EV and regularly charge it overnight, or if you can effectively schedule other high-power appliances to run between 00:30 and 05:30, the savings can be substantial. If most of your electricity use is during the day and cannot be shifted, you might find a different Octopus tariff, such as a standard fixed or flexible option, more suitable.

Ready to Supercharge Your Savings?

If Octopus Go 12M Fixed sounds like the perfect fit for your smart home and EV in 2026, switching to Octopus Energy is straightforward. They handle the entire process, ensuring a smooth transition without interruption to your supply.

Join the thousands of happy Octopus Energy customers and start making the most of those super cheap overnight rates. Plus, when you use our exclusive referral link, you'll get a £50 credit added to your new Octopus Energy account!

Don't miss out on smart savings. Get your personalised quote and switch today:

Join Octopus Energy & Get £50 Credit!