The best business gas rates in September 2026 sit at or below roughly 8p per kWh for most small and mid-sized sites. The wider market runs up to about 10p, and out-of-contract rates hover around 12p.
If your renewal quote has just landed and the number made you wince, you are not imagining things. Wholesale gas has been volatile since renewed conflict in the Middle East disrupted global supply earlier this year, and unlike households, businesses get no Ofgem price cap to cushion the blow. So what should you actually be paying? That depends on how much gas you use, which is why a café, a bakery and a hotel should never chase the same headline number.
This article explains what counts as a good rate for your size, how British Gas, Scottish Gas and other suppliers fit in, and what to check besides the unit price. You will find benchmarks, worked examples, a practical checklist and an FAQ.
What is driving business gas rates in September 2026?
Before you judge any quote, it helps to know what you are up against. Two forces matter most right now.
Wholesale gas is high and jumpy
Wholesale gas spiked in March 2026 after renewed conflict in the Middle East, and it has stayed volatile since. Trading Economics reports UK gas at 183 pence per therm on 26 September, up 118% on a year earlier, with Gulf LNG flows still disrupted and European storage only just over 70% full ahead of winter. One therm is about 29.3 kWh, so that is roughly 6.2p per kWh before transport, levies and supplier costs are added. Catalyst Commercial puts winter 2026 forward gas near 181p per therm but summer 2027 near 130p, so timing matters.
There is no price cap for businesses
Ofgem's cap protects households on default tariffs. From 1 October, it sets the household gas unit rate at 7.97p per kWh including 5% VAT, up from 7.33p, according to The Energy Shop. Businesses get no such safety net. Your rate is negotiated, so it depends on your usage, location, credit profile, contract length and the day you sign. That is why the same site can be quoted very different prices a fortnight apart.
Fixed one-year rates eased after 2023 and sat near 6p through 2024 and 2025 before jumping in 2026. A small business fixed for a year now pays about 10.4p on average, against a 2025 average of 6.36p, according to Business Energy Deals.
What counts as a good business gas rate for your size?
A good rate is relative. A 40,000 kWh site will always pay less per kWh than a 10,000 kWh one, because suppliers spread their fixed costs over more gas. So start by finding your size band.
Find your size band
Comparison panels group business gas users roughly like this: micro (5,000 to 15,000 kWh a year), small (15,001 to 30,000), medium (30,001 to 65,000) and large (above 65,000). Ofgem uses its own label. It treats you as a microbusiness if you use less than 293,000 kWh of gas a year, or have fewer than 10 employees and turnover within about €2 million. That matters because microbusinesses get extra protections, such as renewal notices and the return of any account credit if a supplier fails, according to Love Energy Savings. Not sure of your usage? Check a recent bill, or use our guide to find your gas meter number (MPRN).
Our rate ladder for September 2026
Here is a rule of thumb for judging a fixed unit rate this month. We use the September panel average as the strong line, and the top of this month's published averages as the point where you should start asking questions. These are guides, not quotes.
Your size | Typical annual usage (kWh) | Strong | Typical | High: ask questions |
Micro | 5,000 to 15,000 | 8.0p or below | 8.1p to 10.5p | Above 10.5p |
Small | 15,001 to 30,000 | 8.2p or below | 8.3p to 10.5p | Above 10.5p |
Medium | 30,001 to 65,000 | 8.1p or below | 8.2p to 10.0p | Above 10.0p |
Large | 65,001 and over | 7.7p or below | 7.8p to 9.7p | Above 9.7p |
Rates are pence per kWh, usually quoted before VAT and the Climate Change Levy. Land in the last column and you are not automatically being overcharged, but compare before you sign. Sit near 12p and check your paperwork, because that is where out-of-contract pricing lives.
Why published averages disagree
You will see different averages online because each source measures something different.
Source | Date | What it measures | Unit rate quoted |
MoneySuperMarket (Bionic panel) | 1 to 8 Sept | Average fixed rate across a supplier panel, including maximum broker commission | 8.0p micro, 8.2p small, 8.1p medium, 7.7p large |
24 Sept | Indicative delivered rate for a larger business fixing for winter 2026 | 8.0p to 8.5p | |
23 Sept | Average one-year fixed rate | 10.4p small, 9.9p medium, 9.7p large | |
Sept | Average two-year fixed rate | 11.3p up to 5,000 kWh, 10.0p to 15,000, 9.8p to 25,000, 9.5p to 50,000 | |
8 Sept | Average out-of-contract rate | 12.0p |
Treat them as a range. The panel average is the lower marker, the one and two-year averages show where much of the market sits, and 12p shows the cost of drifting. The same panel averaged 6.2p to 7.2p in April, against 7.7p to 8.2p in early September, so rates move fast. Government statistics can look lower still, because they average contracts signed at different times.
What is the gap between strong and high costs
Two pence sounds trivial until you multiply it by your usage. These examples are illustrative.
Business | Annual gas use (kWh) | Strong rate | High rate | Gap | Extra cost a year |
Café | 12,000 | 8.0p | 10.5p | 2.5p | £300 |
Small restaurant | 25,000 | 8.2p | 10.5p | 2.3p | £575 |
Bakery | 50,000 | 8.1p | 10.0p | 1.9p | £950 |
Small hotel | 100,000 | 7.7p | 9.7p | 2.0p | £2,000 |
Unit rate or standing charge: which matters more?
Headline unit rates get the attention, but the standing charge is a daily fee you pay regardless of how much you use. MoneySuperMarket's September panel shows daily standing charges of roughly 44p to 60p, and 44p a day is about £160 a year.
A real example shows why you need both numbers. Love Energy Savings lists two-year fixed benchmarks for British Gas at 9.3p per kWh with a 48p daily standing charge, and for British Gas Lite, a separate online-only brand aimed at smaller businesses, at 9.5p with 23.1p a day. British Gas has the lower unit rate. Yet at 20,000 kWh a year, British Gas Lite works out about £51 cheaper, at £1,984 against £2,035. The two cross at roughly 45,400 kWh, and above that British Gas wins.
The lesson is simple. Smaller sites should weigh the standing charge heavily, and larger sites the unit rate. Always ask for both, then multiply them out for your own usage. These are benchmark rates, so live quotes will differ.
What else is on your business gas bill?
Two extras can make quotes look different when they are not.
The Climate Change Levy is 0.801p per kWh from 1 April 2026, rising to 0.827p from April 2027, according to Bionic. Some quotes show it separately, and some fold it in, so always ask whether a rate includes it. Businesses in a Climate Change Agreement pay only 11% of the main gas rate.
VAT is 20% for most businesses, and it applies to the levy too. Very low users, below about 145 kWh of gas a day, can qualify for 5% VAT and pay no levy at all.
British Gas, Scottish Gas and other suppliers: what to know before you compare
Just have a look at some key information before making any comparison.
Are British Gas and Scottish Gas the same company?
Yes. Scottish Gas is the name British Gas trades under in Scotland, and both belong to Centrica, according to Wikipedia. Do not confuse it with ScottishPower, which is a separate supplier. Network costs vary by region, so a site in Scotland and one in England can still be priced differently, even from the same parent.
Why you will not always see a headline rate
British Gas Business does not publish the fixed gas rates it offers new customers, though it does publish out-of-contract rates. Its fixed plans run for one to three years. The out-of-contract gas rates it listed from 24 May 2026 were 10.54p per kWh on its variable plan and 15.01p on deemed rates, with standing charges above £1.80 a day, according to Business Energy Deals. Those are the rates to avoid. To see what British Gas or Scottish Gas would charge your site, you need a quote, and the same goes for most large suppliers.
How the market compares
For a feel for the spread, here is a snapshot from our own comparison table for a 10,000 kWh site, excluding VAT, last updated 11 August 2026. Wholesale prices have moved since, so read it as a guide to the spread, not a live quote.
Ten fixed quotes from five suppliers ranged from £809 to £1,022 a year, a £213 gap on identical usage. British Gas Lite appeared twice among the five cheapest. Longer was not automatically cheaper either: TotalEnergies' two-year deal beat its four-year deal by about £111, while Utilita's three-year deal beat its two-year deal by about £100. Comparing is free to you, and we are paid by supplier partners when you switch through us.
Seven ways to secure the best business gas rates
Know your numbers. Have your annual kWh, meter type and MPRN to hand so quotes reflect your real usage. Our guide to business gas meter types helps if you are unsure which you have.
Diarise your renewal window. Drifting onto out-of-contract rates is the costliest mistake, and MoneySuperMarket puts the current average at 12.0p per kWh. British Gas Business, for example, writes to customers around 60 days before a fixed plan ends.
Compare early and like for like. Use the same term, payment method and treatment of levy and VAT. Many suppliers let you agree a new deal months ahead of your end date.
Do the standing charge sum. Multiply the unit rate and the daily charge by your own usage, as in the chart above.
Choose your term with care. MoneySuperMarket says 24 to 36 month deals are currently priced close to 12 month rates, but our snapshot shows longer is not always cheaper. With prices this volatile, there is no risk-free option: a shorter fix lets you re-price sooner if the market falls, while a longer one gives certainty if it rises.
Read the small print. Check exit fees, notice periods and auto-renewal terms. For contracts signed since 1 October 2024, Ofgem rules require broker fees to appear in a contract's principal terms, so ask any broker to show theirs.
Use less gas. Draught-proofing, boiler servicing and sensible heating controls cut your kWh, which trims the bill whatever the rate. Our UK gas price forecast guide covers more ways to prepare.
Frequently Asked Questions (FAQs)
What are the best business gas rates right now?
In September 2026, about 8p per kWh or below is strong for most sizes, up to roughly 10p is typical, and around 12p is what out-of-contract usually costs. Only a live quote for your postcode, meter and usage gives you your real figure.
How much is business gas per kWh?
Published September averages run from about 8.0p on broker panels to 10.4p for one-year fixes on small sites. The gap comes from what each source measures, so use the table above as a range.
Is there a price cap on business gas?
No. Ofgem's cap covers households on default tariffs only. Business rates are negotiated, which is why comparing matters.
Are British Gas and Scottish Gas the same company?
Yes. British Gas trades as Scottish Gas in Scotland, and both are part of Centrica. ScottishPower is a different company.
When should I compare or switch?
Start several months before your contract ends, and never let it roll onto out-of-contract or deemed rates. Leaving a fixed contract early usually means exit fees. On out-of-contract rates, you can typically leave with 28 days' notice.
Will switching interrupt my gas supply?
No. The physical supply stays the same, and only your supplier, contract and billing change. Business switches typically take two to six weeks.
Does it cost anything to compare with SwitchUrEnergy?
No. Our comparison is free to you, and we earn from supplier partners when a customer switches through our platform.
Final Words
The best business gas rates are not a single figure. They move with your size, your contract and the day you sign. In September 2026, aim for the strong end of your band, question anything in the high column, and treat 12p as a warning light. Then check the standing charge, the levy, the term and the exit terms before you commit.
Ready to see where your business sits? Compare the best business gas rates with SwitchUrEnergy, explore our business gas service, or call (0203) 9500885, Monday to Friday, 9 am to 5 pm. Comparing is free, and our team can talk you through your options before you decide.