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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 is anything you are not sure about in this agreement or you wish to make a complaint, please get in touch with our Carbon Calculator Support Team. You can contact us at We would love to hear from you.

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.
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 app and website.
Carbon Footprint
Tonnage of CO2e emissions for a 12 month period.
Carbon Offset
A way in which you can balance your CO2e emissions by contributing towards carbon offset projects.
Carbon Offset Projects
Emissions reduction projects selected by Bulb in partnership with ClimateCare.
Our partners, who are contracted to receive and process emissions reductions on our behalf. Their registered address is 112 Magdalen Road, Oxford, OX4 1RQ.
The person or business that has purchased a carbon offset.

1. Carbon Calculator services

  • 1.1. Our agreement together begins when we send you an email acknowledging your payment and confirming the CO2e emissions (in tonnes) that you have paid to offset through the Carbon Calculator. By making a payment to balance your carbon footprint through the Carbon Calculator, you agree to be bound by this agreement.

  • 1.2. 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.

  • 1.3. You agree that you have entered into this agreement with Bulb in your personal capacity via the website or Bulb app and you have not entered into this agreement with Bulb via any other third party agent.

2. How to purchase your carbon offset

To purchase a carbon offset you are required to:

  • 2.1 use the Carbon Calculator to calculate your carbon footprint; and

  • 2.2 enter your credit/debit card details in the secure payment gateway on the Bulb website or Bulb app (operated by Stripe).

3. When will we start providing the carbon offset

We will begin providing you with the carbon offset as soon as we have contributed to the carbon offset projects on your behalf. Once we receive your payment we will:

  • 3.1 send an email acknowledging your payment and confirming the carbon footprint that you have paid to offset through the Carbon Calculator;

  • 3.2 ensure that your payment will be used towards purchasing emissions reductions of CO2e at least equal to the tonnage of CO2e that the Carbon Calculator indicated need to be purchased to balance your carbon footprint;

  • 3.3 ensure that we receive proof that those CO2e emissions reductions have occurred and have been independently verified;

  • 3.4 ensure that CO2e emissions reductions purchased by us are registered appropriately by ClimateCare to ensure that they cannot be double-counted or re-sold (you will not receive any title to the emission reductions);

  • 3.5 provide emails (unless you have requested not to receive these) updating you on Bulb’s carbon offsetting services; and

  • 3.6 send reminder emails on or around the anniversary of your carbon offset purchase.

4. Ending your carbon offset agreement with us

  • 4.1 You have a legal right to change your mind and terminate this agreement within 14 days of purchasing the carbon offset (this is called a cooling off period).

  • 4.2 Our agreement to provide the carbon offset to you will be completed when we email you to confirm we accept your order, but you can still change your mind and terminate this agreement within 14 days of purchasing the carbon offset.

  • 4.3 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:

  • 4.3.1 we have told you about an upcoming change to the carbon offset services or this agreement and you do not agree to these changes;

  • 4.3.2 we have told you about an error in the price or description of the carbon offset you have ordered and you do not wish to proceed;

  • 4.3.3 there is a risk that supply of the carbon offset may be significantly delayed because of events outside our control;

  • 4.3.4 we have suspended supply of the carbon offset 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

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

  • 4.4 To end the agreement with us, please let us know within 14 days of purchasing the carbon offset by emailing us at or alternatively write to us at Bulb (Carbon Calculator) 155 Bishopsgate, London EC2M 3TQ. Please provide your name, details of the order, and your phone number and email address.

  • 4.5 We will make any 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 within 14 days of you telling us you have changed your mind. No refunds can be given if you exercise your right to change your mind after the 14 day cooling off period.

5. Payments

  • 5.1 Payment for emissions reductions can only be received via the secure payment gateway accessible through the Bulb website or Bulb app. The secure payment gateway provides details of the credit and debit cards that can be used to make payment and the transaction charges applicable to each type of card. Transaction charges and VAT (at the rate applicable at the time of payment) will be added to your purchase of emissions reductions of CO2e that you have chosen to offset.

  • 5.2 All payments will be made through Stripe.

  • 5.3 The cost of a carbon offset may increase over time. We reserve the right to increase the cost per tonne applied within the Carbon Calculator in line with such increases, however, the cost of your carbon offset is valid at time of purchase and you will not be asked to pay any additional funds.

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

6. Other things to consider when using the Carbon Calculator

  • 6.1 Although specific CO2e emissions reduction projects may be highlighted on the Bulb website or Bulb app we do not undertake to apply any sums paid to us to any specific project and reserve the right to apply sums to any emissions reduction project whether referred to in the website, app or otherwise (provided they meet Bulb requirements and subject to proof of emissions reductions and independent verifications).

  • 6.2 We have based our emissions calculations on your responses to the questions asked on the Carbon Calculator and our emissions 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.

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

  • 6.4 We cannot be responsible for any Carbon Calculator users' claims that they are, or their business is, carbon neutral.

  • 6.5 The Carbon Calculator is owned and managed by Bulb.

  • 6.6 Our Carbon Calculator website and app is solely for the promotion of the Carbon Calculator in the UK. Unfortunately, we cannot provide carbon offsets to people that live, or businesses that are established, outside the UK.

7. Changes to this Carbon Calculator Agreement

  • 7.1. 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. Cancelling your direct debit

  • 8.1. If you agree to pay by Direct Debit, you have the right at any time to cancel the mandate for us to take payments by informing your bank of this fact. Depending on the bank's terms, you may be required to give a certain amount of notice before the payment is due to be taken, or to provide your cancellation in writing. You should check the requirements directly with your bank.

  • 8.2. If, after having cancelled your Direct Debit (by contacting your bank in accordance with Clause 8.1), the payments still continue to be taken, you should first contact your bank to obtain a refund. Under the Direct Debit Guarantee, your bank will be liable to refund you for any payments that continue to be made after you cancel your Direct Debit.

  • 8.3. You must notify us that you have cancelled your Direct Debit, so that we can update our records. You should also ensure that you arrange alternative means of making any required payment to us.

9. What we're responsible for

  • 9.1. Our liability (including for negligence and breach of statutory duty) is limited to the amount you paid for the Carbon Offset in any 12 month period. We are responsible for any liability which is not capable of being excluded by law.

  • 9.2. 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.

10. Using personal information

  • 10.1. 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

  • 10.2. 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

11. Our complaints procedure

  • 11.1. 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.

12. Other conditions

  • 12.1. 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.

  • 12.2. 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.

  • 12.3 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.

  • 12.4. 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.

  • 12.5. 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.

  • 12.6. 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.

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

  • 12.8. 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.

13. Online services

  • 13.1. By using the Carbon Calculator, 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.

  • 13.2. 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.

14. The Bulb brand

  • 14.1. About our brand and how to use it

  • 14.1.1. 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.

  • 14.1.2. 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