How to Compare Business Gas Rates in the UK

Running a business in the UK comes with plenty of expenses — and energy bills are one of the biggest. Yet most business owners never bother to compare their commercial gas rates. The result? Thousands of pounds wasted every year on overpriced tariffs.

What Is a Business Gas Tariff?

Unlike domestic energy, business gas tariffs are customised based on your location, annual consumption, credit history, and meter type. Two businesses on the same street could be paying very different rates — which is exactly why comparing commercial gas prices regularly is so important.

The 4 Types of Business Gas Tariffs

Fixed Tariff — Locks in your unit rate for the contract term. Best for budget certainty and usually the most competitive option.

Rolling Contract — Auto-renews each year, typically at higher rates. Many businesses end up here without realising it.

Out-of-Contract Rates — Applied when your contract expires without renewal. Rates are significantly higher, but you can switch with just 28 days' notice.

Deemed Rate Tariff — Kicks in when you move into new premises or let a contract lapse. These are among the most expensive rates available.

Current UK Business Gas Rates (2025/2026)

Business Size

Usage per Year

Price per kWh

Standing Charge/Day

Microbusiness

5,000–15,000 kWh

7.5p

36p

Small Business

15,001–30,000 kWh

6.9p

44.8p

Medium Business

30,001–65,000 kWh

6.9p

46.7p

Large Business

65,000+ kWh

7.2p

48.7p

If you're paying above these figures, you're very likely overpaying.

How to Switch in 3 Simple Steps

1. Enter your postcode on a commercial gas comparison service

2. Speak to an energy expert who matches deals to your usage profile

3. Your new supplier handles the switch — zero disruption to your supply

You can switch during your renewal window, which typically opens 6 months before your contract ends. Don't wait until the last minute or you risk being auto-rolled onto a more expensive tariff.

Commercial Gas Is Not Like Domestic Energy

Business gas contracts work very differently from household energy deals. Tariffs are negotiated rather than fixed, contracts typically run for one to five years, and pricing depends on factors like your annual consumption, business type, and the current wholesale market. Because of this complexity, many businesses stick with the same supplier year after year often to their financial detriment.

When a fixed term contract expires without action, suppliers frequently move businesses onto "out of contract" rates, which can be substantially higher than negotiated tariffs. Regular comparison is the simplest and most effective way to avoid this unnecessary cost.

What Affects Your Commercial Gas Rate?

Understanding what drives your quote helps you negotiate from a position of knowledge. Key factors include:

• Annual consumption (kWh) - higher usage generally attracts better unit rates

• Business sector - risk profiles vary by industry

• Contract length - longer terms can sometimes secure lower rates

• Location - distribution charges differ by region

• Payment method and credit history - suppliers factor these into pricing

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