Changing tariffs within Octopus
Octopus usually makes tariff changes easier than a full supplier switch, but it is still worth slowing down before you tap confirm. Some options need a smart meter, some need a particular heating or EV setup and some fixed deals now carry exit fees.
Reviewed May 2026: this guide has been checked against Octopus guidance on changing tariffs, fixed-tariff exit fees, Agile, Tracker, Cosy and Intelligent Octopus Go eligibility. Always check the final tariff quote in your own Octopus account because rates and eligibility vary by region, meter setup and product version.
The short version
If you are already with Octopus, start from your online account or app and look for the tariff-change option. Octopus says existing customers can normally compare their current costs with available alternatives online, then switch themselves if the option is shown.
The tariff-change option is most straightforward when you are on a variable tariff such as Flexible Octopus. If you are on a fixed tariff, Octopus says the online option may only appear near the end of your contract, or you may need to contact support. Read the exit-fee line before leaving any fixed tariff early, even if you are staying with Octopus.
How to change tariff
Open your Octopus account and find the tariff section. On the website, Octopus describes this as Change my tariff under your account balance. The app may surface it slightly differently, but the decision is the same: compare your current tariff with the alternatives Octopus is willing to offer for your property.
Before confirming, check four things:
- the unit rates and standing charge for your region
- whether the tariff is variable, fixed or smart time-of-use
- the exit-fee line and fixed-term length
- any setup requirement, such as a smart meter, EV, compatible charger or electric heating
If the tariff is not shown, it does not always mean you can never join it. It may mean Octopus cannot yet read your smart meter, your current fixed deal has not reached its online change window or your device setup still needs checking.
Exit fees: when they matter
Flexible Octopus is a variable tariff and Octopus currently describes it as a no-exit-fee plan. Agile and Tracker also remain designed so customers can leave without an exit fee, although Tracker has rejoin rules if you leave before the end of the term.
Fixed tariffs are different. Octopus reintroduced exit fees on some new fixed deals in March 2026, and its own help page says any exit fee should be clearly shown before you switch. Existing fixed deals keep the terms you agreed when you joined, so do not assume someone else’s exit-fee screenshot applies to your account.
This matters for Go, Intelligent Octopus Go, Cosy and normal fixed tariffs because the exact fee and term can depend on the version currently offered to you. Treat the account quote as the source of truth before moving away from a fixed product.
What each tariff normally requires
For a fuller overview of how the tariffs differ, see our guide to understanding tariffs and tariff chooser. As a quick check:
Flexible Octopus is the default variable tariff. It does not need a smart meter, although smart readings still make billing easier.
Agile Octopus needs a smart meter that Octopus can connect to for half-hourly readings. Octopus says it can connect to SMETS2 meters and some SMETS1 meters, but the handover can take time.
Tracker needs regular smart-meter data because the unit rate changes daily. It is not the same as the Ofgem price cap, even though Octopus has separate protection rules for Tracker versions.
Octopus Go is for EV households. Check the live quote and eligibility route because Octopus may ask for EV evidence and the available fixed product can change.
Intelligent Octopus Go needs electricity supply with Octopus, a smart meter and either a compatible EV or charger integration. Octopus’s live page now highlights Andersen charger support as well as other supported chargers and vehicle links, but the compatibility tool is the safest check because support changes.
Cosy Octopus is for homes with a heat pump, electric boiler or electric radiators and a smart meter Octopus can read. It is a heating-load tariff, so do not choose it just because one cheap window looks attractive.
Snug Octopus is for suitable storage-heater homes with the right SMETS2 auxiliary load control setup. If that phrase is not familiar, ask Octopus before assuming your existing storage heaters qualify.
Flux is now a legacy solar import/export tariff for existing customers rather than a normal new-switcher option. New solar customers should usually compare current export choices and any available Intelligent Flux route instead.
Timing your change
The best timing depends on the tariff rather than on a generic rule.
For Agile, the main question is whether you can shift usage away from expensive half-hours, especially the early-evening peak. Seasonal wholesale patterns can help or hurt, but your own flexibility matters more than trying to guess the perfect month.
For Tracker, be comfortable with daily price movement before you join. If you leave before the term ends, check the rejoin rule rather than assuming you can hop in and out without consequence.
For Go or Intelligent Octopus Go, wait until the EV and charging setup is real enough to pass eligibility checks. Intelligent Go also needs the app/device connection to work, so leave time for pairing and test charging instead of planning a tariff switch the night before a long journey.
For Cosy, focus on heating behaviour. It suits homes that can move heat-pump or electric-heating load into its cheaper periods without making the house uncomfortable or pushing too much use into peak windows.
What happens to billing
When a tariff changes, Octopus needs a clean reading point so usage before and after the change is priced correctly. A communicating smart meter normally handles this. If your meter is not sending readings reliably, submit a manual reading when the account asks for one and keep a photo for your records.
Your next statement may show two sets of rates if the tariff changed part-way through the billing period. Your Direct Debit may also be reviewed after the change, especially if the new tariff changes your expected annual cost.
If something looks wrong, check the dates first. A bill covering the old tariff period is not the same thing as Octopus ignoring the new tariff. Our guides to submitting meter readings and why app usage and bills do not always match explain the usual evidence to gather.
Gas and electricity can be separate
If Octopus supplies both fuels, changing the electricity tariff does not necessarily change the gas tariff. This is common because smart tariffs such as Agile, Go, Intelligent Go and Cosy are electricity products. You might have a smart electricity tariff while your gas stays on Flexible or a separate fixed product.
Check both fuels before confirming anything. It is easy to focus on the EV or heat-pump saving and miss a gas tariff that is still fixed, ending soon or carrying different terms.
A sensible way to decide
Use the tariff-change screen as a quote, not as a recommendation. If you can shift usage and accept price movement, Agile or Tracker may be worth comparing. If you charge an EV at home, compare Go and Intelligent Go against your charger compatibility and day-rate exposure. If your main load is electric heating, compare Cosy against your actual heating schedule.
If you decide Octopus is still the right fit and you are not already a customer, the referral-code page explains how Matt’s referral link works before you start the switch.