Hidden non-commodity costs: why two-thirds of your UK business energy bill isn't the commodity
About two-thirds of a UK business electricity unit rate isn't the commodity itself. It's grid maintenance, distribution, transmission, government levies and infrastructure charges. These components are quietly rising and increasingly drive your unit rate — even when wholesale falls.
The myth of the cheap unit rate
When you compare two energy quotes side-by-side, the unit rate (the pence-per-kWh number) is the headline. But the unit rate is a packaged number — and most of what's packaged inside it isn't the energy itself.
For a typical UK commercial electricity contract, the breakdown looks roughly like this: about one-third commodity (the actual electrons), and about two-thirds non-commodity — the various regulated, infrastructure and policy charges that the supplier collects on behalf of the broader system.
What makes up the non-commodity portion
- DUoS (Distribution Use of System): the cost of running the regional distribution network operators (DNOs) — the wires between the transmission grid and your meter.
- TNUoS (Transmission Network Use of System): the cost of the high-voltage transmission grid.
- BSUoS (Balancing Services Use of System): the cost of National Grid ESO's real-time balancing of supply and demand.
- RO (Renewables Obligation): recovers payments to renewable generators commissioned before April 2017.
- FiT (Feed-in Tariff): recovers payments to small-scale generators commissioned under the FiT scheme.
- CfD (Contracts for Difference): recovers the difference between strike prices and market prices for newer renewables.
- Capacity Market: recovers payments to generators that committed to be available during winter peaks.
- CCL (Climate Change Levy): the per-kWh environmental tax.
- E11 (from April 2025): a new charge funding the UK's new nuclear generation programme.
Why these are quietly rising
Most non-commodity charges are set by regulators or network operators on long cost-recovery cycles. The big drivers are grid investment, renewables and new-nuclear funding, system balancing, and net-zero policy. Multiple government schemes are funded via levies on electricity. Some will fall over time; most will rise.
What you can do about it
You cannot opt out of non-commodity charges entirely. But you can choose how you take the risk — by deciding which components to fix into your unit rate (paying a premium for certainty) and which to pass through (paying actuals each period). On a flex or multipurchase contract, you make the choice per component.
Bottom line
If you only ever look at the unit rate, you're missing two-thirds of the story. Understanding the non-commodity components is what turns a procurement exercise from a price comparison into an actual risk-management decision.
Hidden non-commodity costs: why two-thirds of your UK business energy bill isn't the commodity — quick questions
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