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
More articles
The UK Capacity Market — what it costs you, what it earns you
The UK Capacity Market is a critical mechanism for ensuring grid stability, but it directly impacts business energy bills through the Capacity Market charge. This article explains how the charge appears on your bill, who pays it, and how businesses with backup generation or storage can participate to generate income. It also outlines when participation makes financial sense.
GB Energy: What’s Actually Happened Since Launch
Since its launch in 2023, GB Energy has delivered on core commitments: securing 150+ GWh of renewable capacity, stabilising the wholesale market through targeted contracts, and signalling strong government support to private investors. For UK businesses, this means clearer price signals, improved procurement certainty, and a foundation for long-term energy strategy. The next 24 months will be decisive for grid integration and market reform.
Half-hourly Settlement One Year On: What UK Businesses Need to Know
One year after Ofgem’s Market-wide Half-Hourly Settlement (MHHS) rollout, UK businesses face a transformed energy landscape. While the transition has improved billing accuracy and enabled new tariff opportunities, many still operate under outdated contracts that ignore half-hourly data. This article outlines the practical impacts, identifies where savings are now possible, and explains why re-evaluating your energy contract is essential.
Ready to take control of your energy spend?
Talk to a TUS energy consultant about a free Energy Health Check — usually 15 minutes, with a written summary back to you.