Business Gas Comparison UK: Rates, Contracts and How to Switch

Business gas prices in the UK are set commercially between supplier and customer, without the protection of the domestic price cap. For most businesses, gas costs are a significant but often under-scrutinised element of overheads, particularly in sectors with high heat demand such as hospitality, food processing and manufacturing.

This guide explains how business gas pricing works, what drives rate differences between businesses, and how to approach switching or renegotiating a gas contract.

How is business gas priced in the UK?

Business gas prices are primarily driven by wholesale gas market costs. The UK wholesale gas market trades on the National Balancing Point (NBP), with prices influenced by European gas supply and demand, storage levels, LNG import availability and seasonal heating demand. Retail business gas prices reflect wholesale costs plus network distribution charges, supplier operating costs and margins, the Climate Change Levy (CCL), and VAT. The DESNZ publishes quarterly data on non-domestic gas prices through the Quarterly Energy Prices series. DESNZ Table E4.2 provides annual average prices by consumption band and is the primary official source for UK business gas price benchmarking.

Business gas rates by consumption band

The clearest pattern in DESNZ non-domestic gas data is the inverse relationship between consumption volume and unit rate. In 2024, DESNZ Table E4.2 shows that businesses consuming below the lower threshold paid an average of 5.64 pence per kWh for gas, while businesses consuming above 27,778 MWh annually paid an average of 4.49 pence per kWh. The difference of approximately 1.15p/kWh represents a significant cost premium for smaller consumers. On an annual consumption of 50,000 kWh, typical for a small hospitality or retail business, this equates to approximately £575 per year in additional gas cost purely from being a small customer. In Q4 2025, manufacturing sector gas prices averaged 3.5p/kWh, a decrease of 11.6% year on year according to DESNZ Quarterly Energy Prices (March 2026).

Gas contract types for businesses

Fixed-term contracts lock the unit rate for the contract duration, typically 12, 24 or 36 months, and are the most common structure for small and medium-sized businesses. Flexible purchasing contracts allow larger businesses to purchase gas in tranches as market opportunities arise, requiring active energy management capability. Deemed or out-of-contract rates apply where no formal supply agreement is in place and are typically the most expensive rates offered by the supplier. Interruptible contracts offer lower unit rates to large industrial users in exchange for the supplier's right to interrupt supply during periods of high system demand - not suitable where gas continuity is operationally critical.

The MPRN and what you need to switch gas supplier

The Meter Point Reference Number (MPRN) is the unique identifier for a business gas supply point. It is required when obtaining quotes from new suppliers or initiating a switch and can be found on the current gas bill. To obtain a competitive gas quote, a business needs the MPRN, annual consumption in kWh, the contract end date and notice period, and the current unit rate and standing charge for comparison.

Switching business gas supplier: the process

Check the contract renewal window first: most fixed-term business gas contracts require 30 to 90 days notice before the end date. Missing this window typically triggers automatic rollover at the supplier's current rates. Obtain the MPRN and consumption data, then obtain at least three quotes comparing total annual cost rather than unit rate alone. Confirm what broker commission or uplift is embedded in any quoted rate. The new supplier handles the transfer notification through Uniform Network Code (UNC) procedures. Submit a gas meter reading on the transfer date to both suppliers to ensure accurate final billing.

Gas and electricity: should a business use one supplier for both?

Many UK businesses purchase gas and electricity from the same supplier on a dual fuel basis, simplifying billing and account management. Some suppliers offer a marginal discount for dual fuel contracts. However, the best available gas rate and the best available electricity rate may not always come from the same supplier. Businesses with significant energy spend may benefit from tendering gas and electricity contracts separately to optimise each independently. For smaller businesses where administrative simplicity is a priority, a dual fuel contract from a supplier with competitive rates on both fuels is a reasonable approach, provided rates are benchmarked at contract renewal.

Ofgem regulation and business gas customer protections

The regulatory framework for business gas customers is evolving in parallel with the electricity market. Ofgem's non-domestic market review identified patterns of consumer harm in the gas broker market, including undisclosed commissions, extended contract lock-ins and automatic rollover practices. The incoming TPI regulatory framework will apply to gas brokers as well as electricity intermediaries, requiring registration, conduct standards and commission disclosure.

For businesses with complaints about their gas contract or supplier, the formal route is through the supplier's complaints process and then, for eligible microbusinesses, the Energy Ombudsman. The Energy Ombudsman's non-domestic jurisdiction covers businesses with fewer than 10 employees and annual turnover not exceeding two million euros. The Energy Ombudsman can award remedies including contract correction, bill adjustment and compensation. The Energy Act 2023 gave Ofgem enhanced enforcement powers applicable to the non-domestic market. Businesses should keep records of their contracts, renewal notifications and correspondence with suppliers and brokers, as these are relevant to any dispute resolution process.

Reducing business gas consumption

UK business gas consumption fell 13.28% between 2014 and 2023, driven by building insulation improvements, boiler and heating system upgrades, and fuel switching to heat pump technology. ESOS audits, mandatory for large businesses every four years under the Energy Savings Opportunity Scheme Regulations 2014 (SI 2014/1643), typically identify gas efficiency measures as among the highest-return interventions. The Industrial Energy Transformation Fund (IETF) provides funding support for businesses looking to reduce gas dependency through electrification and efficiency measures - details at gov.uk/guidance/industrial-energy-transformation-fund.

Frequently asked questions

Is there a price cap on business gas in the UK?

No. The Ofgem domestic price cap does not apply to business gas customers. Business gas prices are negotiated commercially between supplier and customer. Ofgem requires suppliers to offer reasonable deemed contract rates, but there is no cap on business unit rates.

What is the MPRN and where do I find it?

The Meter Point Reference Number (MPRN) is the unique identifier for a gas supply point at a specific address. It is a 10-digit number printed on the current gas bill, typically near the meter details section. It can also be obtained by contacting the current gas supplier.

How much notice do I need to give to switch business gas supplier?

Notice periods for business gas contracts vary but 30 to 90 days before the contract end date is typical. The exact requirement will be in the supply contract terms. Failing to give notice triggers automatic rollover at the supplier's current standard business rates.

What is the Climate Change Levy on business gas?

The Climate Change Levy (CCL) on gas is currently 0.672 pence per kWh from April 2025 (HMRC). Businesses with a Climate Change Agreement (CCA) can claim a 65% exemption on gas CCL. Details are at gov.uk/guidance/climate-change-levy-rates.

Can I get a dual fuel contract for gas and electricity?

Yes. Many business energy suppliers offer combined gas and electricity contracts on a dual fuel basis. Businesses should confirm that both fuel rates are competitive against the market at renewal, as the best dual fuel deal is not always from the same supplier as the best individual fuel deals.