UK business gas is a smaller market than business electricity, less crowded with brokers, and more exposed to a single wholesale benchmark: the National Balancing Point. That concentration changes the comparison. A useful business gas quote is read against NBP forwards and the seasonal shape of consumption, not against a simple unit-rate league table.
TL;DR
- Non-domestic gas has no Ofgem price cap. The Tariff Cap Act 2018 covers only domestic default and standard variable tariffs; business gas pricing is unregulated at the headline level, with microbusiness protections in the supply licence.
- UK business gas wholesale is priced against the National Balancing Point (NBP), traded at ICE Endex and OTC. NBP forwards drive both fixed retail rates and any index-linked flex contract.
- Deemed and out-of-contract gas rates are routinely 40 to 100% above the equivalent fixed contract. Ofgem rules require suppliers to publish them, and many businesses sit on them for months.
- Climate Change Levy on natural gas in 2025-26 is 0.775 p/kWh, the same headline rate as electricity (HMRC CCL rates, April 2025). VAT is 20% non-domestic, 5% under the de minimis threshold.
- The dual-fuel framing carried over from domestic supply does not work for most businesses. Gas and electricity contract cycles, suppliers, and hedging shapes are routinely treated as separate procurement exercises.
Last reviewed: May 2026
How UK business gas pricing actually works
The structure of a non-domestic gas unit rate looks similar to electricity at first glance and diverges at the wholesale layer. Both have a unit rate (p/kWh), a daily standing charge, a Climate Change Levy line, and VAT. Underneath, the wholesale market is different: gas is priced against the National Balancing Point, the virtual trading hub for UK gas defined under the gas transportation arrangements. NBP day-ahead and forward prices, traded on ICE Endex and bilaterally OTC, are the reference any retail business gas supplier hedges against.
The non-commodity stack for gas is smaller than for electricity. The principal components are National Transmission System (NTS) entry and exit charges, Local Distribution Zone (LDZ) transportation charges, shipper costs, metering charges, and the supplier's operating margin. There is no large policy levy stack on gas equivalent to the electricity Contracts for Difference levy or Renewables Obligation. DESNZ Q1 2026 industrial energy price statistics show non-commodity costs typically run roughly 20 to 30% of a non-domestic gas unit rate, against 40 to 55% for electricity at comparable consumption.
That lower non-commodity share means business gas unit rates track wholesale more directly than electricity does. When NBP forwards move, business gas quotes move with less buffer. A 20% wholesale move shows up in retail quotes faster than the equivalent electricity move would.
Gas is closer to the wholesale curve than any other regulated UK fuel.
Standing charges on gas tend to be lower than on electricity but follow the same per-meter logic: every gas meter point reference carries a daily fixed fee. A multi-site business with twelve sites pays twelve gas standing charges per day, every day of the year, whether the boilers run or not.
Wholesale gas: what actually drives the NBP curve
NBP is shaped by a small set of supply and demand variables. On the supply side: UK Continental Shelf production (declining structurally), Norwegian pipeline imports through the Langeled and Vesterled interconnectors, LNG imports through the Isle of Grain, South Hook and Dragon terminals, and interconnector flows from continental Europe through the IUK and BBL pipelines. On the demand side: heating load (weather-driven), power sector gas burn (driven by electricity demand and the gas-versus-renewables merit order), and industrial demand.
Seasonality is the strongest single signal. NBP forwards routinely show a winter premium of several pence per therm above summer months because of heating load. A 12-month fixed retail quote prices the average of the forward strip across that delivery period; a 24-month quote averages two winter peaks and two summer troughs.
The 2022-2023 NBP spike, driven by the Nord Stream rupture and the collapse of Russian pipeline flows to Europe, reshaped the forward curve for years. NBP forwards through 2025-2026 have settled well below the 2022 peak but remain above the pre-2021 baseline. DESNZ Q1 2026 statistics show non-domestic gas unit rates at small consumption bands averaging roughly 6 to 9 p/kWh in early 2026, against pre-2021 averages closer to 3 to 4 p/kWh.
The catch is that suppliers hedge differently. A supplier that bought 2027 forwards in early 2025 will quote differently from one that bought them in late 2025. Two quotes on the same day for the same contract can reflect entirely different hedge books. That dispersion is wider on gas than on electricity because the wholesale share of the unit rate is larger.
Fixed retail versus index-linked: which works for what
The default non-domestic gas contract for SMEs is a fixed-term fixed-rate deal: 12, 24, 36 or 48 months at a flat p/kWh and a flat standing charge. The supplier hedges the forward strip and prices a margin on top. For consumption below roughly 1 GWh per year, fixed is almost always the cleanest option because the hedging cost is bundled in.
Above that threshold, NBP-linked or basket contracts start to make sense. An NBP-linked contract takes the non-commodity layer at supplier rates but buys wholesale gas in tranches against the NBP forward curve, on dates the customer chooses. The customer carries the timing risk; the supplier carries delivery, settlement and shaping. Basket contracts pool multiple consumers under a single managed hedge run by an energy management firm.
For very large consumers, gas PPAs and direct supply agreements exist but are rare outside the largest industrial off-takers. The corporate PPA market in gas is far smaller than in electricity because there is no analogue to the renewable generator structure that drives electricity PPAs.
In practice, the dividing line between fixed and flex sits somewhere between 1 and 3 GWh of annual gas consumption. Below it, fixed is the calmer choice. Above it, flex becomes economic once management fees are accounted for.
The deemed rate trap
When a non-domestic gas contract ends and the customer has not signed a new one, the supplier rolls the meter onto a deemed or out-of-contract tariff. Ofgem rules in the supply licence require suppliers to publish those tariffs. Most do so on their non-domestic web pages or on request. The rates are routinely 40 to 100% above the equivalent fixed contract. A business misses the renewal window, drops onto the deemed rate, and stays there because the renewal letter went to an old address or sat unread in a shared inbox. Three months on the deemed rate at 80% above market on a 100,000 kWh gas profile is a four-figure overpayment, often more than the saving available from any other procurement decision in the year. The pattern is so common that Citizens Advice and Ombudsman Services Energy both publish dedicated guidance for businesses caught on deemed rates. A simple diary entry six months before contract end is the cheapest control the average SME can put in place.
The microbusiness protections in the supply licence require suppliers to send contract end notifications inside a defined window before the contract end date, and to set out the principal terms of any renewal on offer. The notification must arrive in writing. A business that does not receive one has grounds for complaint to the supplier and, if unresolved, escalation to Ombudsman Services Energy.
Citizens Advice and the Ofgem energy advice line for businesses both publish step-by-step guidance on what to do when a deemed rate has kicked in. The practical sequence: switch immediately to the cheapest available fixed contract, separately raise a complaint about the renewal notification process if it was missed, and only escalate to the Ombudsman after the supplier's own complaints process has been exhausted (or after eight weeks).
Why dual-fuel framing misleads businesses
Domestic energy marketing is built around the dual-fuel package: gas and electricity from the same supplier at a small bundled discount. That model does not translate cleanly to non-domestic supply.
Three reasons. First, gas and electricity contract end dates almost never align unless a business has actively synchronised them, which usually requires accepting a short or long bridging contract on one of the two. Second, the supplier mix that is competitive on business gas is different from the mix competitive on business electricity: the largest non-domestic suppliers play in both markets, but mid-tier and specialist names lean one way or the other. Third, the hedge cycles are different: gas tracks NBP, electricity tracks GB baseload and peak shape, and a supplier that is sharp on one is rarely sharp on both at the same time.
Most procurement consultants run gas and electricity as separate tenders for that reason. A small operator who insists on a single dual-fuel non-domestic deal is usually paying a small premium for the convenience.
Bundling is a domestic habit, not a procurement strategy.
The exception is the very smallest microbusiness, where the procurement effort to run two tenders exceeds the potential saving from running them separately. For a microbusiness on 12,000 kWh of gas and 8,000 kWh of electricity, dual-fuel from a single supplier may be the most rational use of management time, even if the headline pence per kWh is marginally higher.
Comparing quotes: what to actually look at
A genuine business gas comparison surfaces more than the p/kWh figure. The full quote should show unit rate, daily standing charge, contract term, start and end dates, the consumption volume the quote is priced against, the tolerance band, early termination terms, deemed-rate (or out-of-contract) rates, and any broker uplift. A quote that hides any of these lines is incomplete.
The table below sets out the rough shape of where business gas costs land at three illustrative consumption bands. These are indicative of the 2025-26 market structure rather than a supplier price list.
| Cost layer | Microbusiness (12,000 kWh/yr) | SME (200,000 kWh/yr) | Mid-market (2 GWh/yr) |
|---|---|---|---|
| Wholesale (NBP) share of unit rate | roughly 55-65% | roughly 60-70% | roughly 65-75% |
| Non-commodity share (transportation, shipper, metering) | roughly 20-30% | roughly 15-25% | roughly 10-20% |
| Standing charge per day | 20p to 60p | 40p to 150p | negotiated |
| Climate Change Levy (HMRC, 2025-26) | 0.775 p/kWh | 0.775 p/kWh | 0.775 p/kWh or reduced under CCA |
| VAT | 20% (5% under de minimis 145 kWh/day) | 20% | 20% |
| Typical contract path | fixed 1-3 yr | fixed 1-4 yr | flex, basket, NBP-linked |
The de minimis threshold for VAT on gas is different from electricity. For gas, an average daily use below 145 kWh qualifies for 5% VAT rather than 20%. For electricity the threshold is 33 kWh per day. A business close to either threshold should run the calculation on twelve months of metered data, not on a single month, because HMRC applies the rule to average consumption across the supply period.
Standing charges deserve more weight than the typical SME owner gives them. A gas meter standing charge at 50p per day is roughly 182.50 GBP per year before any unit consumption. For a property used only seasonally (a Highland holiday let, a Pembrokeshire surf school, an Aberystwyth student-let HMO that empties for July and August), the standing charge can dominate the bill.
Microbusiness protections and the Ofgem licence
The microbusiness definition under the Ofgem supply licence sits at no more than 100,000 kWh of electricity per year, no more than 293,000 kWh of gas per year, or fewer than ten full-time equivalent staff with annual turnover below the threshold set in the licence conditions. The gas figure is higher than the electricity figure because the same headcount tends to use more gas in kWh than electricity in kWh, particularly in hospitality and small manufacturing.
Microbusiness protections include the requirement that the supplier send contract end notifications, publish principal terms in writing, offer access to ADR (Ombudsman Services Energy), and refrain from objecting to a switch on grounds other than legitimate debt. The microbusiness protections were tightened across 2023-2024 through the non-domestic market review, with further changes flagged in Ofgem's January 2026 statutory consultation on TPI rules.
The 17-day faster switching process applies to non-domestic gas as it does to electricity. The same operational reality applies: switches inside the contract end window run smoothly; switches outside it land the meter on the deemed rate until registration completes.
For a business in Wales, Scotland or England, the same Ofgem regime applies. Non-domestic gas supply is reserved to Westminster and regulated by Ofgem across Great Britain. Northern Ireland sits under the Utility Regulator, with a separate retail gas market structured around Phoenix Natural Gas, SSE Airtricity NI and firmus energy in different licence areas; a Belfast business compares those names rather than the GB supplier set.
Contract length tradeoffs in 2026
The decision between a 1-year and a 4-year gas fix in 2026 is a wholesale forward bet dressed up as a procurement choice. With NBP forwards still elevated against the pre-2021 baseline but well below the 2022 spike, a 12-month fix carries the risk that wholesale rises through the next two winters; a 48-month fix carries the risk that wholesale falls and the locked-in margin looks expensive in three years' time.
Most procurement desks running tenders through Q2 2026 are splitting the difference: 24-month fixes for SMEs that want a clean lock without committing too far forward, 36-month fixes for larger consumers with confidence in their consumption profile, and short 12-month fixes for businesses planning energy efficiency work or site closures inside the next 18 months.
The break clause is the underrated detail. Most non-domestic gas fixes do not have a break clause. Early termination triggers payment of remaining margin on forecast volume. For a business planning to close or relocate a site inside the contract term, that exit cost can be the difference between a clean break and a five-figure surprise.
A 4-year fix from a published-rate supplier today does not necessarily price below a 4-year fix from a non-published supplier on the same load. The published rate sets a benchmark a small operator can negotiate against, but the lowest market price for a given load is still usually found through a competitive tender across three or four suppliers, with broker commission visible.
Reading the meter and the MPRN
Every UK gas meter has a Meter Point Reference Number (MPRN), the gas equivalent of the electricity MPAN. The MPRN is the unique identifier the new supplier needs to register the meter. It appears on every gas bill, usually at the top of the second page or on the supply details section, and is between 6 and 10 digits long.
A quote issued against the wrong MPRN will not switch cleanly. A quote issued against the right MPRN but the wrong consumption volume will reconcile against actual consumption at the end of the contract year. Both are checks worth running before signing.
The Annual Quantity (AQ) figure on the bill is the supplier's view of expected annual consumption, used to set the standing charge band and to forecast for hedging purposes. If the AQ is materially wrong (a business that has insulated the roof, installed a heat pump for low-temperature heating, or changed operating hours), the supplier should be asked to update it before the next quote.
One final detail. Gas Safe Register is the UK statutory body for gas engineers; any work on a non-domestic gas meter or connected appliance must be carried out by a Gas Safe registered engineer. That is unrelated to the supply contract but worth noting: a quote that includes meter changes or asset moves should sit alongside a Gas Safe engineering plan.
Editorial disclaimer. KaelTripton is an independent UK publisher. This article is editorial, not personal financial or energy procurement advice. Rates, caps, grant levels and supplier offers move; verify any figure with the named primary source before acting on it. KaelTripton does not earn commission from suppliers or brokers mentioned.
Frequently asked questions
Is there an Ofgem price cap on business gas?
No. The Ofgem default tariff cap under the Tariff Cap Act 2018 applies only to domestic default and standard variable tariffs. Non-domestic gas supply is uncapped at the headline level; microbusiness protections come through the supply licence conditions instead.
What is the deemed rate on business gas and why does it matter?
The deemed rate is the tariff a supplier moves a meter to when the contract ends and a new one has not been signed. It is routinely 40 to 100% above the equivalent fixed contract and Ofgem rules require suppliers to publish it. Missing the renewal window is the most expensive single mistake an SME makes on gas procurement.
How does the Climate Change Levy work on business gas in 2025-26?
HMRC's CCL main rate for natural gas, updated April 2025, is 0.775 p/kWh for 2025-26. Businesses on a Climate Change Agreement with their sector trade body can claim a reduced rate. The levy is itemised on non-domestic bills and does not apply to domestic supply.
Does dual-fuel make sense for a UK business?
Usually not above microbusiness scale. Gas and electricity contract end dates rarely align, the competitive supplier set differs between the two fuels, and the hedging cycles are independent. Most procurement consultants tender gas and electricity separately for that reason.
What is the VAT de minimis threshold for business gas?
Average daily use below 145 kWh qualifies for 5% VAT rather than the standard 20% non-domestic rate. HMRC applies the rule to average consumption across the supply period, not to a single month. The electricity threshold is different at 33 kWh per day.
How long does a business gas switch take in 2026?
Standard switches run on the Ofgem 17-day faster switching process where the new contract is signed inside the contract end window and no debt block sits on the meter. Switches outside that window can leave the meter on a deemed rate for several weeks until registration completes.
Sources
- Ofgem - Energy policy and regulation landing page (2026)
- Ofgem - Energy advice for businesses
- Ofgem - Non-domestic market review: TPI rule changes, January 2026 statutory consultation
- DESNZ - Energy prices statistics collection, Q1 2026 release
- HMRC - Climate Change Levy rates, April 2025 update
- Ombudsman Services Energy - non-domestic complaints jurisdiction
- Citizens Advice - energy supply guidance for small business
- DESNZ - Department for Energy Security and Net Zero homepage
