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Contract structures

Fixed versus pass-through business electricity contracts

The word fixed does not always mean every component is fixed. Compare the actual list of included and variable charges.

Last reviewed 18 September 2026

Key answer

Read the contract's cost boundary

A fully fixed offer aims to bundle more components into agreed rates, while a pass-through structure allows specified external costs to be charged as they arise. Labels vary, so the written inclusions and exclusions matter more than the product name.

Procurement colleagues reviewing a commercial energy contract, relevant to fixed versus pass-through business electricity contracts
Contract structure, dates and risk allocation matter alongside the headline rate.

The practical trade-off

A broader fixed price can improve budget certainty, but the supplier prices the risk of future cost changes. Pass-through pricing can make individual components more transparent while exposing the business to movements and reconciliation.

Compare a realistic range, not just the starting rate. Ask for an example invoice and a list of every item that can change during the term.

  • Which wholesale and network elements are fixed?
  • Which policy charges can change?
  • How and when are pass-through costs reconciled?
  • Are metering, capacity and broker costs separate?
  • How is the annual estimate calculated?
Small business owner discussing an energy contract renewal, relevant to fixed versus pass-through business electricity contracts
Early renewal preparation gives a business more time to check its options.
Finance manager checking the terms in a business energy agreement, relevant to fixed versus pass-through business electricity contracts
Record the key dates, charges and assumptions before accepting a contract.

Sources

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Next step

Compare the known costs

Calculate both quotes, then record variable items beside the result.

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