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Octopus Energy mascot with heat pumps and hot drink

Introducing Cosy Octopus

The smart electricity tariff designed to keep heat-pump homes toasty.

Don't have a heat pump yet? Find out more about switching to cleaner, greener heating.

Dip with chips
Triple dip with Cosy Hours

Keep your home warm for less with super cheap rates, three times a day, every day.

Heat pump
Stay cosy and spend less

Shift your heat pump and other electricity use and save an extra £300 on your electricity bills.

Piggy bank
Shift more, save

The more heat pump use you shift out of peak, the more you'll keep in your pocket.

How does it work?

Cosy Octopus is a 3 rate tariff with triple dip Cosy Hours every day: eight hours of super cheap electric to warm your home.

Graph showing Cosy Octopus rates with a double dip of cheap energy
  1. Three cosy periods of super cheap rates between 04:00 - 07:00, 13:00 - 16:00 and 22:00 - 00:00 every day, 51% cheaper than the Day rate in your region.
  2. A peak rate between 16:00 - 19:00, 45% above the Day rate in your region.
Constantine with a cup of coffee

Sign me up!

You need a heat pump to be eligible for Cosy Octopus, but it doesn’t need to have been installed by us. If you're in the process of getting one installed, you can still switch to Cosy.

Don't have a heat pump but interested in an estimate?
Click here to find out more

To switch to Cosy Octopus you'll need to:


Be an Octopus Energy customer

If you're not with us yet, sign up below and you'll join us on one of our standard tariffs initially while we connect all the dots behind the scenes.


Have a smart meter we can connect to

We can connect to second generation (SMETS2) meters, and some types of first generation (SMETS1) smart meters.


Hang tight while we connect to your smart meter

It generally takes us around 14 days to connect to a smart meter so we can read it remotely – whether it's one we've just installed, or one we're taking over after you switch to us. Read more on this.


Accept our Terms & Conditions via email

Once we're connected and getting half–hourly readings from your smart meter, we'll send you an email asking you to accept the Terms & Conditions of Cosy Octopus to complete your switch. Have a read of our smart tariff Terms & Conditions now..


You're all good

Your tariff will change automatically to Cosy Octopus. You should see the change straight away on your online account.

Don't have a heat pump yet? Find out more about making the switch to super green heating here.

Cosy Octopus is a product of our labs, available now to customers through our beta programme

You'll need a SMETS2 smart meter, or some types of first generation (SMETS1) smart meters, that we can receive half-hourly consumption data from.

Don't have a suitable smart meter?

Start your switch below to register your interest for a smart meter. The smart meter installation comes at no extra cost.

Once you've registered your interest, our team will be in contact when we have an appointment in your area.

Cosy Octopus is a beta product. Some things may not work the first time, and installations and processes may take longer than we'd like. Third party tech like In-home Displays won't always work, and on occasion data issues with smart meters can take significant time to fix or prevent things from working at all.

To be eligible for Cosy, you should have a heat pump (air, or ground source) at a property we supply. We may ask you to provide the MCS certificate for your heat pump installation to confirm this.

If you're cool with this, and you'd still like to work with us to make world-changing energy tariffs a reality, check this box so we know you're on board. You will always be able to switch to one of our fairly priced standard tariffs at any time.

Already an Octopus customer?

Log in to your account to switch to Cosy Octopus through your online dashboard.

Not yet with Octopus?

No problem. We'll get you up and running, and install a smart meter if you need one at no extra charge.

Cosy Octopus is a cutting edge innovation created by Octopus's unique technology. Unlike products available from other companies, it relies on a smart meter system (which as our Founder Greg explains here, is not always fully reliable). Some customers have experienced delays. However, of the thousands of customers on these smart tariffs, the vast majority are now experiencing smooth service.

This figure is calculated based on applying the average 12 month saving seen by our Octopus Cosy customers (20%) to a typical heat pump and other electricity usage (5,783 kWh) based on July 24 price cap prices.

Yes, Cosy is a flexible (aka variable) tariff. This means the price - the unit rates and standing charge - of the tariff can rise and fall with wholesale energy prices.

We'll always give reasonable notice of any changes to the pricing of flexible tariffs. When the price of our flexible tariff changes, the price of your Cosy tariff will also change (as Cosy rates are calculated as a percentage of the flexible rate in your area).

There's no exit fees or tie-ins, so if Cosy Octopus doesn't work for you, you're free to switch tariffs or change suppliers with no penalties at any time.

Remember: your monthly payment isn't fixed. We only recommend changing your Direct Debit if your usage is greatly above - or below - your monthly payments.

No, Cosy Octopus is an electricity only tariff, and takes advantage of the variability of electricity wholesale prices throughout the day.

Yes, all of our innovative tariffs rely on smart meter tech. We also need to be able to link to your smart meter, so we can get at the data. This means you'll need to:

  1. Be supplied by Octopus
  2. Have a SMETS2, or Secure SMETS1 smart meter we can take half hourly readings from.

Not with us yet? Join Octopus Energy through our Cosy Octopus sign-up page, and we'll put you on an interim tariff until you've switched and had your smart meter installed / working on our systems.

Industry rules mean we can't replace a meter we don't supply. It's the same story getting the data from your meter; you need to be an Octopus customer. This means we don't know for sure that your account / meter will work with this tariff until we have you on supply with Octopus.

If you don't have a smart meter, we'll contact you to book an installation once your account has switched to us.

Number one and most important: no matter what your In-Home Display (IHD) - the little portable screen you get with smart meters - says, your triple dip super cheap periods stay between 04:00 - 07:00, 13:00 - 16:00, and 22:00 - 00:00 while your peak period stays between 16:00 - 19:00

Customers on our other smart tariffs sometimes see their in-home display (IHD) showing the off-peak rate kicking in at 01:30am, or their peak rate starting at 17.00pm. This is because IHDs aren't very good at accounting for daylight saving times.

You should trust what we put on your bills. The IHD isn't really determining anything on your meter or tariff, rather just showing some information that might not be correct. Ultimately, our system is set up to account for changes due to daylight savings, so please don't worry: your bills and charges will be correct!

As an alternative, you can use the Octopus mobile app instead and be assured that you are seeing the correct information at all times.

If you have a heat pump (air or ground source) installed at your property, you can join Cosy Octopus. If you have another system in your property, get in touch and we'll let you know if you're eligible for the tariff.

Why Octopus?

Which Recommended Supplier 2024Which Recommended Supplier 2023Which Recommended Supplier 2022Which Recommended Supplier 2021Which Recommended Supplier 2020Which Recommended Supplier 2019Which Recommended Supplier 2018

2024 · 2023 · 2022 · 2021 · 2020 · 2019 · 2018

Great value for the long term

Our standard prices have always been cheaper than any large supplier

Uswitch Supplier of the year award

2023 · 2021 · 2020 · 2018

The UK's most awarded energy supplier

We've won more awards for customer service than anyone else.

Good Shopping Guide Ethical Accredited

The only accredited energy supplier

100% green energy

All our electricity comes from 100% renewable sources like sun, wind and water

Don't take our word for it.

As featured by

“Octopus Energy can save you money - and it's better for the environment, too”

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“The company that has done the most to advance UK renewables”

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“The only energy firm we've awarded Which? Recommended Provider status to more than twice”

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“Independent supplier Octopus Energy; a supplier that's aiming to shake-up the market”

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“Octopus Energy takes on the big six suppliers”

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“The energy industry is starting to feel the effects of Octopus' sucker punch”

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