A fixed contract sets your commodity unit rate for an agreed term. This supports predictable budgeting for the commodity element of your bill. Your total invoice can still change because it includes network, industry and other third-party charges that sit outside the commodity unit rate.

Fixed means the commodity cost of electricity and our supply margin are priced as agreed in the contract details for the term. Fixed does not mean every charge on the invoice is fixed. Some charges are pass-through and can change in line with industry rules and third-party costs.

Your contract allows us to pass through third-party costs in full, without mark-up unless your agreement states otherwise. These costs can change during the term. This includes new charges being introduced and changes that are greater than the assumptions or forecasts available at the time of contracting.

Pass-through costs can include distribution and transmission charges, balancing and system charges, settlement and trading charges, loss factors and group corrections, Capacity Market charges, and environmental or social obligation scheme costs. Metering, data and registration related charges can also be passed through.

If there is a change in law or a market change that affects the cost, method, or risk of supplying electricity, we may vary charges to reflect that change in line with the contract. Changes applied under these provisions do not give a right to terminate early.

Standing charges and pass-through costs

Your standing charge includes charges we incur to serve your site that sit outside the commodity unit rate. For half hourly metered electricity this includes metering and data services, plus fixed elements of network charges. These amounts are pass-through and are billed based on our underlying costs.

This typically includes Meter Operator charges, data collection and data aggregation services for half hourly metering, and the fixed charges set by distribution and transmission networks. Where these costs change during the contract term, we will reflect the updated charges from the relevant effective date, in line with your agreement.

Your price is based on the consumption and half hourly usage profile used at quotation. Your contract includes a volume tolerance of plus or minus 10 per cent of the contracted annual consumption for each supply point, assessed per supply point and not across sites unless agreed in writing.

Tolerance also applies to your usage profile. A significant shift in when you use electricity, including movement between DUoS time bands, can be treated as outside tolerance even if total kWh stays within 10 per cent.

If consumption or profile shape falls outside tolerance, we may charge the out-of-tolerance volume at our then-current deemed or out-of-contract rates. We may also recover additional costs we incur as a result, and we may adjust the contract price for the remainder of the term to reflect the revised usage level or pattern.

If consumption exceeds tolerance by more than 20 per cent in any rolling three month period, we may apply out-of-tolerance charges immediately rather than waiting for the end of the contract year.

If you expect your consumption or profile to change beyond tolerance, you must notify us as soon as possible. We may then review and renegotiate the contract, including price and terms.

If your pricing was agreed on an aggregated multi MPAN basis, the pricing can depend on those MPANs registering and remaining on supply. If a material portion of the priced volume drops away, the contract may allow a re-price of the remaining MPANs for the rest of the term, or recovery of incremental costs that arise.

To quote accurately we usually need your MPAN, site details, and a sufficient period of complete half hourly data. We also need to understand any planned operational changes that could materially affect consumption or load shape. If data is missing or unreliable, we may need to use estimates and then reconcile once settled data is available.

If a new fixed term is not agreed before the end of your fixed term, supply can continue on deemed or out-of-contract terms. These rates are typically higher and are designed to reflect the additional risk of supplying without a fixed term contract.

Billing is based on half hourly settled volumes for each supply point, including the relevant loss factors and any industry group correction applied through settlement. If settled data is not available, we may use metered data or estimates until settled data is available, subject to the contract terms.