On paper, winter 2027 gas looks almost cheap. Traders are swapping it at around 154.75 pence per therm, an old-fashioned unit of heat equal to roughly 29.3 kWh, which works out at a modest 5.3p per kWh. Yet that tidy figure is a mirage for anyone opening a household bill. Once delivery charges and supplier costs pile on, realistic planning rates climb to a far more sobering 9.7p to 10.2p per kWh through the colder months, nearly double the headline number.
Then there is the startling plunge. In the space of a single week, wholesale prices have tumbled by about 8%, a dramatic slide that has left households, businesses and forecasters scrambling to read the signals. Is this the first crack in a stubbornly expensive market, or a fleeting dip before the next painful spike? The forces behind this swing are more surprising than most people realise, and understanding them could make a real difference to what you pay when winter 2027 arrives.
Why Do Business Gas Prices Move in 2027?
Wholesale gas prices swing quite a lot. Winter-27 and Summer-27 each fell almost 8% in one week, yet Summer-27 still sits about 25% above its end of September level. Winter-27 now trades at 154.75 pence per therm (a therm is a standard unit for measuring gas energy), which works out at roughly £1.55 per therm, or about 5.3p per kWh.
Winter-27 and Summer-27 each fell almost 8% in one week, yet Summer-27 still sits about 25% above its end of September level.
To put that in context, a small business using 50,000 kWh of gas a year would see a wholesale cost of around £2,640 at today’s Winter-27 price, before the supplier adds network charges, its own margin, the standing charge and VAT. An 8% move in one week shifts that wholesale figure by about £210. Wholesale gas typically accounts for 60–75% of a delivered business gas bill, with transportation, metering, supplier margin and levies making up the rest.
Nobody can tell you where prices go next, because Strait of Hormuz talks remain unsettled. Most owners feel unsure, and you’re in good company. At your gas contract renewal, ask how your rate is built and on what date it was priced. Enerbiz tracks wholesale trends and standing charges across more than 20 UK suppliers, which helps businesses judge when a renewal rate is worth locking in.
What Could Gas Cost Your Business in 2027?
UK wholesale gas for early 2027 settled at 221.86 pence per therm (a therm is a unit of gas energy, equal to 29.3 kWh), or about 7.6p per kWh.
Although nobody can promise where gas will land, the forward prices (what traders agree today to pay for gas delivered in a future period) give you a fair range to plan around.
Wholesale is only 60 to 75 percent of your bill, so delivered rates could sit near 9.7p to 10.2p per kWh in winter and 7.6p to 8.1p in summer.
These are estimates, not quotes. For a small business using 30,000 kWh a year, split evenly between winter and summer, that works out at roughly £1,455 to £1,530 for the winter half and £1,140 to £1,215 for the summer half.
That puts the annual unit cost at around £2,595 to £2,745, before standing charges of about £180 to £365 a year, VAT and the Climate Change Levy.
Prices swung 31p per therm in two days, which is about 1p per kWh, or close to £317 a year on that same 30,000 kWh.
So you’re not alone if planning feels hard. A six-step tendering process can help larger users compare suppliers, validate volumes and secure contracts with clear terms.
Fixed-price contract rates stay as agreed until the end date, so the effect of higher wholesale prices appears at renewal, not during the fixed term. Before your contract ends, compare business gas offers, because renewal timing decides what you pay.
Should You Fix Your Business Gas Rate for 2027?
Fixing your gas rate means you lock in one price per kWh for the whole contract, so you know what you’ll pay and can budget with fewer surprises. Fixed quotes follow forward wholesale prices, so business gas rates move as the market moves. Enerbiz can help you compare options by forecasting cash flow under various contract terms.
Gas therm rates (a therm is a unit of gas energy, about 29.3 kWh) for December 2026 settled at 226.17p on 3 November, down from 238.97p a week earlier. That drop of 12.8p per therm works out at roughly 0.44p per kWh, or about £131 a year for a small business using 30,000 kWh.
As a guide, a small business on a fixed rate of 10p per kWh using 30,000 kWh a year would pay £3,000 for the gas itself. A standing charge of 50p per day adds about £183, bringing the yearly total to around £3,183.
- Your contract end date and notice period decide when you can lock a price.
- Out of contract rates are often higher than fixed term rates. At 14p per kWh, the same 30,000 kWh would cost £4,200, which is £1,200 more than the fixed example above.
- Nobody knows how Gulf shipping or low UK storage will play out, so no fix promises a saving. British gas storage has fallen for a second week to around 60% full, the lowest of seven major European markets listed.
If your contract ends within six months, get quotes now.
How Do You Spot Gas Uplifts Before Renewing?
How do you spot an uplift (the jump between your current rate and the price offered at renewal) before it reaches your inbox? Start by finding your contract end date on your invoice or online account, then watch the forward price for that start period. Forward prices are what traders pay today for gas delivered later, and they feed straight into commercial gas prices.
Spot an uplift before it lands: find your contract end date, then watch the forward price for that start period.
If you renew in April 2027, the Summer-27 price matters most. It rose from 150.42 to 164.30 pence per therm (a therm is a unit of gas energy, roughly 29.3 kWh) in one week.
On 500,000 kWh a year, that added roughly £2,400 to the wholesale cost, taking it from about £25,700 to about £28,000 before network charges, levies and supplier margin. Winter-27 gas also rose 13.06p to 156.00p a therm.
Nobody can predict next week. Many owners feel caught out, but you’re in good company, and checking early helps. Domestic Energy Switching offers ongoing monitoring of market movements and timely renewal suggestions to keep your budget predictable.
How Can You Compare Business Gas Quotes Online?
Once you know your contract end date and which way forward prices are moving, you can get real quotes online in one sitting. Many small business owners do this, and you’re in good company. Have your legal business name, site address, estimated yearly kWh (units of gas) and current supplier ready.
- Enter your postcode, and the form fills in your business name and address. Add your MPRN (the number that identifies your gas meter point).
- Review the panel quotes, each showing a unit rate plus a standing charge (a fixed daily fee).
- Compare the total yearly cost, not the unit rate alone.
Indicative one-year SME gas prices for small users sit near £0.122 per kWh, yet the yearly total sets your business gas bill. Benchmarking each quote against market options for standing charges and unit rates helps you spot an expensive fixed fee early.
For example, a business using 20,000 kWh a year on a quote of £0.122 per kWh with a £0.30 daily standing charge would pay about £2,440 for gas plus £109.50 in standing charges, giving a yearly total of £2,549.50.
A rival quote at £0.118 per kWh looks cheaper, but with a £0.60 daily standing charge it comes to £2,360 plus £219, or £2,579 a year.
That makes it £29.50 more expensive overall. Business gas contracts usually have no cooling-off period, so check the yearly total carefully before you sign.
Common Questions
What Happens if My Business Gas Contract Ends and I Do Nothing?
A stitch in time saves nine; doing nothing often costs more. Your supplier moves you onto a pricier out-of-contract rate or rolls you into a new term. Many owners get caught; you can check early.
How Long Does Switching Business Gas Supplier Usually Take?
Switching business gas usually takes 4 to 6 weeks from signing to going live. You can sign the same day, but notice periods and paperwork take the time. Your gas keeps flowing, and no engineer visits.
Can I Leave a Fixed Gas Contract Early if I Close My Business?
Maybe, but it depends on your contract’s wording. Some contracts allow exit when you close or when tenancy changes, though closing doesn’t cancel the fixed term automatically. Check your exit clause, and call your supplier, since you’d otherwise pay a termination fee.
Why Is My Gas Bill Estimated, and How Do I Fix It?
You missed a reading, so your supplier guessed from past usage. You’re not alone, and you can fix it: read your meter today, submit it online within five days, and check your next bill carefully.
Is VAT Charged on Business Gas, and Can I Reclaim It?
Yes, you’ll usually pay 20% VAT on business gas. You can reclaim overcharged VAT if your gas qualifies for the 5% reduced rate, like charity use. Just send a self-certificate through your supplier’s online account.
