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Contract Natural Gas (CNG)

Business Gas from CNG

UK owned and run independent gas supplier Contract Natural Gas (CNG) has a range of different business gas tariffs to suit businesses of any size.

CNG was established in 1994, at the opening of the competitive energy market, and has developed into a major player in the SME gas market.


The CNG Checklist


  • Are their prices fully fixed? No, all contracts allow pass through of cost changes
  • Do they include metering and transportation costs in the price? Yes
  • Do they include FIT and RO and CFD in the price? Not applicable, gas supplier
  • What is their back billing policy? Anything up to 6 years
  • Do they require a letter of authority? Yes
  • Does the contract lapse on change of tenancy? Yes


  • Is your contract end date on the invoice? Yes
  • Is your termination date on the invoice? Yes
  • When will your renewal letter arrive? 120 days before end date
  • When do you need to terminate? At least 90 days before end date
  • Do they require termination letter by recorded delivery? Yes
  • Will they rollover your contract? Yes
  • How high are the out of contract rates? 6.95p/kWh



  • Do they install smart meters as part of the supply contract? No
  • Do they support existing smart meters with full functionality? Yes
  • Do they provide New Connection & Upgrade Services? Yes
  • Do they support IGT meters? Yes however these require bespoke pricing
  • Do they support all electricity profiles including half hourly? Not applicable, gas supplier only
  • Do they support related and aggregated meters? Support aggregated but not related meters


  • Do they offer green and renewable products? No
  • What is their Fuel Mix? Not required as a gas only supplier

Other things to know about CNG:

The Harrogate based business is:
  • A commercial only gas specialist;
  • Offers 1-4 year contracts;
  • Offers products with no standing charge;
  • Will only consider customers with a credit score (Delphi) of more than 30;
  • Will take on low consumption meters;
  • Provides one-to-one account management to its customers;
  • Offers a flexible billing service in tune with your business’s needs
  • Offers inclusive smart meters for new and existing customers over 293,000kWh
  • Offers Smart Meter upgrades to all customers
  • Operates a full site works service of new connections, meter installs, & upgrades


CNG’s latest contract terms Click on the following link to access CNG’s latest contract terms for business energy customers: CNG’s T&Cs Are CNG’s contracts fully fixed? No, all elements of the CNG price can be passed through. This means that when you agree a contract with CNG the price can change through the contract term to reflect additional costs.
  • Commodity: Inclusive, Variable from the second contract year and every subsequent year thereafter
  • Transportation: Inclusive, Variable
  • Metering: Inclusive, Variable
CNG also reserves the right to amend the terms of the contract in the following circumstances:
  • Where the customer fails to fulfil their obligations under the contract.
  • Where gas customers fail to use the stated consumption under the terms of the contract.
To find out more visit our Guide to Fixed Prices. Back billing and CNG CNG are not currently signed up to the Energy UK Back Billing standards. This means that CNG are able, under the Limitations Act, to back bill their customers for anything up to 6 years. Many suppliers have voluntarily limited their back billing rights to two years and in some cases a single year. CNG are therefore one of the less amenable suppliers in this area making a smart meter a sensible choice with CNG. To find out more visit our Guide to Back billing. CNG and Letters of Authority In order to act on your behalf in securing your business a great energy deal CNG require us to have a signed Letter of Authority from yourselves. The fastest way to authorise us to work on your energy supply arrangements is to use our eSign service to agree our Evergreen Letter of Authority. Change of Tenancy and CNG Moving into a premise is known as a Change of Tenancy in the business energy market. It has also been termed a Change of Occupier or is known by its acronyms CoT and COO. However it is referred to, the opportunities it opens up are the same. This is great news for deal seekers. Whilst the existing supplier is obliged to continue to provide energy to the new occupier, the occupier is not obliged to take out an extended contract with that supplier. Indeed a Change of Tenancy customer has total freedom of movement and is free to accept a contract with a supplier of their choice There are however of course a number of rules and requirements. Firstly, as the new occupier, if you use energy you will need to pay for it, regardless of your contractual status. Secondly, you will need to identify as quickly as possible the identity of the existing supplier Thirdly, you will need to field calls from sales organisations and the existing supplier themselves offering you contracts of varying lengths to continue or to begin to supply the premises. As a result as a new occupier you will need to agree a new contract either with the existing supplier or with a new supplier of your choice. Not only that but you will need to inform the existing supplier as quickly as possible that you are the new tenant to prevent you being held liable for charges incurred by the previous occupier should they not have ended their agreement satisfactory. It can prove a real headache knowing whom to trust – whether it’s the old tenant, the landlord the current supplier, the pushy salesman ringing, knocking and emailing, the prospective new suppliers. That’s where Business Juice comes in, by working on your behalf, identifying your existing supply arrangements, reporting your change of tenancy, ensuring you are not held liable for costs not incurred before your occupation and benchmarking contracts for your selection we can help you save time, money and a whole lot of stress.

eSign – Fast, Convenient Online Approval

The fastest way to authorise us to work on your energy supply arrangements is to use our eSign service to agree our Evergreen Letter of Authority. We’ll take care of all correspondence, handle all the loose ends and enable you to focus on establishing your business in its new premise. And what’s more once your contract is in place we’ll manage your supplier relationship from beginning to end, all part of the Business Juice service.
Business Juice Top Tip Always ensure that you take opening meter readings on the day, or as close as possible to the day, that you move into the premises to ensure that you only pay for the energy that you use.


Where to find your contract end date on your CNG bill Your CNG gas invoice places the contract end date on right hand side of the first page of the invoice. This is opposite your business address. CNG also detail the date any termination notice must be received by in order to switch contract or supplier.

If in doubt feel free to fax us your bill on 0845 387 5701 or send it to and we will help locate the information for you.

When to expect your CNG renewal letter CNG sends their renewal letter to customers around 120 days in advance of the contract end date. This will contain CNG ‘s proposal for your rates for the coming period. It may provide a variety of options or a single price. It will however not be the most competitive price available in the market as the renewal letter is designed for customers who don’t use an energy broker and as such are priced at a higher level than can be obtained in the market.
Business Juice Top Tip Every Business Juice client receives a unique key facts statement detailing all there is to know about their energy contract including all the important dates relative to your deal. Sign up today and take control with Business Juice.

Terminating with CNG

You are required by CNG to provide written notice at least 90 days before your contract ends of your intent to terminate your contract at the end of its fixed period.
Business Juice Top Tip Terminating your contract is key to gaining freedom of movement and having access to the best deals for your next business energy contract. It pays to always be aware of your termination obligations so as to ensure that you act as soon as conditions allow in order to help you get the best out of the business energy market. Or better still sign up for our evergreen letter of authority and we will terminate on your behalf well ahead of time and provide you with a range of market leading options at the right time to suit your business.
Rollover Contracts and CNG CNG operate a policy of selling auto-rollover contracts. If you fail to terminate your existing contract more than 90 days ahead of your contract end date you will be rolled over for a fixed term of 12 months. By using Business Juice you can avoid the costly mistake of falling into the rollover trap and paying premium rates for 12 months. To find out more visit our Guide to Rollover Contracts. Terminating but remaining on supply with CNG If you terminate but fail to leave CNG’s supply at your contract end you will be placed on CNG’s punitive Out-of-Contract rates. If you have provided termination notice to CNG and expressed your intent for freedom of movement at contract end but you fail to leave CNG’s supply you will be placed on CNG’s out of contract rates. Don’t be caught out! By using Business Juice to manage your energy contracts we will terminate and manage your new contract seamlessly to ensure you avoid penalty rates. CNG and Out of Contract Rates CNG out-of-contract rates are 6.95p/kWh and a variable standing charge. Even one week exposed to this level of charges mounts up, that’s why clients taking our contract life management service makes sense: removing your exposure risk and letting you focus on your business confident in the knowledge that your energy contracts are in safe hands. To find out more visit our Guide to Out of Contract Rates


What payment terms does CNG offer? CNG operate a Monthly, Variable Direct Debit meaning the amount you pay directly relates to the volume of energy you consume each month. CNG also offers cash/cheque payment terms however this is only in limited circumstances where agreed with CNG. To find out more visit our Guide to Supplier Payment Terms. How to claim the reduced VAT rate for your CNG bill? Click here for CNG’s VAT declaration certificate. To find out if your business is eligible for paying the reduced rate of VAT on your business energy bill visit our Guide to VAT Declaration. When to expect your bill from CNG CNG operate a policy of billing their customers on a monthly basis. CNG and Online Billing CNG do not currently offer their customers online billing. This means CNG customers will continue to receive paper invoices. Where to find your metering information on your CNG bill Your CNG gas invoice will feature the gas meter point reference number, the MPRN, on the first invoice page, located on the upper left hand side above the supply address. If in doubt feel free to fax us your bill on 0845 387 5701 or send it to and we will help locate the information for you.


CNG and Smart Meters In line with the mandated rollout of smart meters CNG installs meters for gas customers consuming more than 732,000 kWh per annum. In addition CNG install smart meters as part of their contract terms for gas customers consuming less than 732,000 kWh per annum. CNG will also inherit smart meters of any type and will continue to operate the meter with its full smart functionality. This is done at no extra cost to you. For more information on Suppliers’ policies on smart metering visit our Guide to Suppliers & Smart Meters. CNG & New Connections and Upgrade services CNG currently only offer new connections and upgrade services to customers when they take out a new 12, 24, 36 or 48 month contract. If this doesn’t suit your requirements, to find out which suppliers meet your connections needs call us on 0800 051 5770. Go one step better and by appointing Business Juice to manage your energy contracts you can take advantage of our management fee free new connections and upgrades offer. CNG & IGT Meters CNG support meters supplied via IGT networks (Independent Gas Transporter). If your gas supply is delivered via an IGT network then unlike some suppliers CNG can offer you a gas supply contract. However the meter will require a bespoke priced gas supply contract. CNG & Supporting Meter Types CNG support all gas meter types including ‘aggregated’ meters. This means whatever gas metering system you have, even if it is supplied via an IGT network, CNG can support it.

Getting in touch

Does CNG sound like the business energy supplier you’re looking for? If so call now on 0800 051 5770 or alternatively the fastest way to authorise us to work on your energy supply arrangements is to use our eSign service to agree our Evergreen Letter of Authority. Not sure if CNG is right for you? If you’re looking at switching your energy supplier, we’re here to help you determine whether CNG is right for you. We take the research, negotiation and paperwork off your hands and help you switch to a better deal with your choice of new energy supplier. How we help you switch your business energy supplier. Our team of energy experts can help you determine whether CNG is going to be the right supplier for you. The service we provide is independent and impartial, making sure that you get exactly the right deal for your business.