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While this is a legal agreement, we have tried to write it in a way that is clear and easy to understand. If there’s anything you’re not sure about in this agreement, please get in touch with our Member Support Team. You can find our contact details at

Note: the information in this agreement relates to our Carbon Calculator and carbon offsets. If Bulb is also your energy provider, please see our standard terms and conditions.

To start, here are some definitions of terms used throughout this section:

These terms and conditions.
Annual carbon footprint
A person's total carbon emissions, measured in tonnes, over a 12-month period.
The people who calculate your carbon footprint. Bulb is our trading name. Our registered company and the energy licence holder is Bulb Energy Limited Company Number 8469555 registered in England. Our registered business address is 155 Bishopsgate, London EC2M 3TQ.
Carbon Calculator
The online Bulb Carbon Calculator provided on the Bulb website.
Carbon credit
A certificate verifying one tonne of carbon emissions has been reduced by a carbon reduction project. One or more can be bought to offset emissions created elsewhere. We buy carbon credits verified by internationally recognised standards, the Verified Carbon Standard and Gold Standard.
Carbon offsetting
A way of balancing out carbon emissions by buying carbon credits for the same amount. Money raised from the purchase of carbon credits goes towards the carbon reduction project concerned.
Carbon offsetting service
The service offered by Bulb. On receipt of each monthly payment from you, we buy one carbon credit for every tonne in your monthly carbon footprint.
Carbon reduction projects
Projects committed to reducing emissions in other parts of the world. Bulb selects its carbon reduction projects in partnership with EcoAct.
Our partners, who we work with to receive and process emissions reductions on our behalf. Their registered company name is Carbon Clear Ltd, their registered address is Unit A, 70-79 York Way, London, 9AG, and their company number is 05575619.
Monthly carbon footprint
One twelfth of the annual carbon footprint indicated in tonnes.
Our payment partners, who send and receive debit/credit card payments on our behalf. Stripe is their trading name. Their registered company name is Stripe Payments Europe, Ltd, their registered address is The One Building, 1 Grand Canal Street Lower, Dublin 2, Ireland, and their company number is 513174.
The person who has signed up to carbon offseting.
  1. Carbon offsetting service

    1. Our agreement together begins when we send you an email acknowledging your payment and confirming the carbon emissions (in tonnes) you’re paying to offset. By making a monthly offsetting payment, you agree to be bound by this agreement. This agreement may change in future, so please check back regularly to read it. 

    2. You have made a commitment to us that you are over 18, live in the United Kingdom and you are allowed to sign up to this agreement.

    3. You agree that you’ve entered into this agreement with Bulb in your personal capacity via the Bulb website, and that you haven’t entered into this agreement with Bulb via or on behalf of any other third party agent.

  2. How to offset your carbon footprint

    To offset your carbon footprint you can either:

    1. use the Carbon Calculator to calculate your own annual carbon footprint based on your lifestyle; or

    2. choose to offset a fixed amount.

    Then you must enter your credit/debit card details in the secure payment gateway (operated by Stripe) on the Bulb website.

  3. When you start offsetting

    As soon as you’ve made a payment, we will:

    1. send an email acknowledging your first payment, confirming your monthly payment schedule and the size of the monthly carbon footprint you are paying to offset;

    2. make sure each monthly payment goes towards projects reducing carbon emissions at least equal to this monthly carbon footprint;

    3. make sure we receive proof that those reductions in carbon emissions have occurred in the form of carbon credits;

    4. make sure that carbon credits purchased by us are registered appropriately by EcoAct so they cannot be double-counted or re-sold. We do this by “retiring” each carbon credit in the registry, marking it as already used, in Bulb’s name and not yours;

    5. send emails (unless you have requested not to receive them) updating you on Bulb’s carbon reduction projects; and 

    6. send reminder emails on or around the annual anniversary of your first payment. 

  4. Payments

    1. Payments to offset your monthly carbon footprint will start on the day you sign up for our carbon offsetting service, and continue on a monthly basis until it is cancelled. Payment will be taken on the same day of the month as the first payment (or the closest date possible).

    2. Each payment will purchase carbon credits equal to either your monthly carbon footprint, or the fixed amount you signed up to offset.

    3. Payments are not subject to VAT. They can only be made via the secure payments operated by Stripe on the Bulb website. This secure payment gateway also provides details of the credit and debit cards that can be used. 

    4. All payments will be made through Stripe. 

    5. The cost of a carbon credit may increase over time. We reserve the right to increase the cost to offset per tonne in line with such increases. We’ll give you 30 days’ notice to let you know about any changes, so you can choose whether to continue offsetting with us.

    6. The way we calculate carbon emissions in the Carbon Calculator may improve over time. We reserve the right to change the tonnage of CO2e for each daily activity you undertake, but the size of your monthly carbon footprint and cost of your monthly payments will remain the same as at time of purchase. They will not change unless you recalculate your annual carbon footprint based on the new calculations.

    7. If we are unable to accept your order, for example, if we identified an error in the price or description of the carbon credit, we will inform you of this and will not charge you.

  5. When you end offsetting

    1. This agreement is independent from any agreement you have with Bulb to supply your energy. If you are switching energy supplier, we will continue to take your carbon offsetting payments until you end this agreement by cancelling carbon offsetting in your Bulb account.

    2. You have a legal right to change your mind and terminate this agreement within 14 days of starting carbon offsetting (this is called a cooling-off period). The 14-day cooling-off period starts on the date your first payment is taken. 

    3. You can end your agreement with us at any time by cancelling carbon offsetting in your Bulb account. Your carbon footprint will remain offset for a month after your last payment, but we won’t take any more monthly payments. However if you cancel less than 24 hours before your next payment is due, the payment may still be taken by Stripe. In this case, you can request a refund by contacting help using the email address associated with your Bulb account. You can find our contact details at

    4. You may end this agreement with us immediately if any of the below happens. We will refund you in full for any services that have not been provided and you may be entitled to compensation. The reasons are:

      1. we have told you about an upcoming change to our carbon offsetting service and you do not agree to these changes;

      2. we have told you about an error in the price or description of our carbon offsetting service you have ordered and you do not wish to proceed;

      3. there is a risk that supply of the carbon credits may be significantly delayed because of events outside our control;

      4. we have suspended supply of the carbon credits for technical reasons, or notify you that we are going to suspend them for technical reasons, in each case for a period of more than 90 days; or

      5. we have done something wrong and you have a legal right to end the agreement.

    5. You will receive refunds due to you as soon as possible. If you are exercising your right to change your mind within 14 days of your purchase, then your refund will be made via Stripe within 5-10 days of you cancelling carbon offsetting in your Bulb account. Subject to 5.2 above,  if you exercise your right to change your mind after the initial 14-day cooling-off period, we can’t refund payments we have already received.

  6. Other things to consider when using the Carbon Calculator

    1. Although specific carbon emissions reduction projects may be highlighted on the Bulb website, we do not undertake to apply any sums paid to us to any specific project. We reserve the right to apply sums to any emissions reduction project whether or not referred to in the website or otherwise (provided they meet Bulb requirements, can prove emissions reductions and have been independently verified).

    2. Where you choose to offset your personalised carbon footprint, we have based our emissions calculations on your responses to the questions asked on the Carbon Calculator. Our calculations are estimations based on current scientific data relating to emissions factors, but the accuracy of the calculations cannot be guaranteed. As new scientific data is published, we will review our calculations and make appropriate adjustments when we consider it necessary.

    3. We'll update the figure for the average UK carbon footprint from time to time. You can read about how we calculate this average on our website. If you choose to offset a fixed amount based on the average UK carbon footprint, the cost of your monthly payments will remain the same as at time of purchase.

    4. We only supply carbon offsetting for personal use or for internal use by your business, and you agree not to use them for any resale purposes.

    5. We are not responsible for any Carbon Calculator users’ claims that they are, or their business is, carbon neutral. 

    6. The Carbon Calculator is owned and managed by Bulb. 

    7. Our Carbon Calculator website is solely for the promotion of the Carbon Calculator in the UK. Unfortunately, we cannot provide carbon offsetting to people who live, or businesses established, outside the UK.

  7. Changes to this Carbon Calculator agreement

    1. From time to time, we may update this agreement to comply with changes to laws or regulations, or where our business necessitates a change to this agreement. Please check this page regularly to review updated terms. The date this agreement was last updated is at the bottom of this page.

  8. What we're responsible for

    1. Our liability (including for negligence and breach of statutory duty) is limited to the amount you paid for our carbon offsetting service in any 12-month period. We are responsible for any liability which is not capable of being excluded by law.

    2. Except in relation to any liability which is not capable of being excluded by law, we are not liable for any loss or damage (including negligence and breach of statutory duty) that we couldn't reasonably have expected would result from breach of this agreement at the time you entered into it.

  9. Using personal information

    1. We will process your personal data in line with our Privacy Policy, which we may amend from time to time. You can find it at

    2. You have a number of rights which relate to access and control of your data. These are also set out in our Privacy Policy, which you can find at

  10. Our complaints procedure

    1. If you're unhappy with our service, you can make a complaint by emailing us at We will follow the complaints policy on our website.

  11. Other conditions

    1. In the event of a company restructure, change of ownership or another event required as part of our general course of business, we may transfer any of our rights or obligations under this agreement and it may not be possible to notify you or seek your permission beforehand.

    2. In the event of change that may affect this agreement, you are not able to transfer your rights or obligations under this agreement without agreeing this with us.

    3. We won't tolerate violence, physical aggression or verbal or written abuse towards our staff or agents. If it happens, we can take legal action or report it to the police.

    4. If we need to serve a notice on you in connection with this agreement, we will use either your email address or postal address that you have provided to us. If we post a notice to you in connection with this agreement, it will be assumed to have been delivered two working days after it was posted unless it is issued to you by hand or email in which case it will be considered to have been delivered immediately.

    5. This agreement, any other agreements you receive from us, and any documents explicitly referred to in this agreement, are the entire agreement between you and us.

    6. Nothing in this agreement affects our legal rights or powers. Nothing in this agreement affects any of your statutory rights that can't be excluded by law.

    7. If any part of this agreement is void or unenforceable, the rest of the agreement will be unaffected.

    8. This agreement is governed by the laws of England. If there is any dispute between us, it will be dealt with by the courts of England.

  12. Online services

    1. By using the Carbon Calculator or any online tools provided by Bulb to offset carbon emissions, you agree that we will provide you the services under this agreement online and you agree that you will provide us with accurate personal details, including your personal email address, and will keep these details up to date.

    2. If you're unable to use our online service due to reasons we agree are beyond your control, you will in no way be penalised for this.

  13. The Bulb brand

    1. About our brand and how to use it

      1. We want to make sure the Bulb brand is used in the right way. We don't want to confuse people. Feel free to link to Bulb's website/social media accounts, but please do not use the Bulb brand name in any of your own online profile names, handles, or website URL.

      2. Please get written permission from Bulb before using any of Bulb's brand features. Bulb's brand features include but are not limited to:

        • The Bulb logo

        • Bulb's brand colours

        • Bulb's font

        • Bulb's supergraphics

Last updated: 4 August 2021