Last updated: Saturday 12 September 2026 (Europe/London).
Next update: when Bionic or WeSave reprint their September panel averages, or when a supplier publishes a dated SME own-site rate card I can verify without inventing a SwitchSquid quote.
By: Switch Editorial Team, Switch Squid Ltd
There is no Ofgem price cap on business energy. That is the whole product difference. Domestic default tariffs from 1 October 2026 sit under a £1,723 typical Direct Debit ceiling. Your café, office or workshop does not. The rate you pay is the rate you last signed — or the deemed / out-of-contract rate the supplier puts you on when you miss the renewal window.
I am Switch. I will not invent a SwitchSquid live SME quote. What I will do is label dated broker averages I re-opened today. WeSave (market data reviewed 4 September 2026) puts average micro-business electricity at 27.20p/kWh with a 79.61p/day standing charge. Bionic (panel averages, 1–8 September 2026, inclusive of maximum Bionic commission) puts a micro-business band at 26.4p/kWh and 91.3p/day, about £2,973 a year at 10,000 kWh. Those two tables do not use the same usage bands. Read them as labelled snapshots, not as your invoice.
uSwitch’s business energy pages I opened still lead on older Bionic-sourced figures (April 2026 on one hub, August 2026 on another). That is the competitor gap this September URL is here to fill. When you are ready to compare for your MPAN, use the business energy hub — then confirm the contract on the supplier or broker paperwork, not on this table.
Why business electricity rates UK September 2026 look “about 26–27p”
Wholesale gas moved hard into early September. WeSave’s 7 September note said near-term wholesale electricity was around a quarter higher than a month earlier, and UK wholesale gas about 30% higher over 30 days, with European storage lower than recent Septembers (WeSave cited around 67% full in early September). I am passing that on as WeSave’s market commentary, dated 7 September 2026, not as an Ofgem statistic.
The domestic October cap still exists in the background because gas-fired generation sets a lot of GB power prices. It does not cap your business unit rate. A micro-business that fails to re-contract can be rolled onto deemed or out-of-contract rates with no regulated ceiling. Bionic’s own sales copy still says it can save SMEs up to 35% versus going out of contract. That is their claim, not mine.
WeSave averages — reviewed 4 September 2026
Source: WeSave, Business Energy Prices September 2026 and the matching latest business electricity rates page. WeSave labels these as indicative 1-year fixed-rate averages from data on 4 September 2026. Actual prices vary by consumption, location, meter type, supplier and term. VAT treatment is not a single number — most businesses pay 20% unless they qualify for the reduced 5% rate.
| Business size (WeSave band) | Annual usage | Avg electricity unit rate | Avg standing charge |
|---|---|---|---|
| Micro | 0–4,999 kWh | 27.20p/kWh | 79.61p/day |
| Small | 5,000–14,999 kWh | 26.90p/kWh | 87.83p/day |
| Medium | 15,000–24,999 kWh | 26.88p/kWh | 93.03p/day |
| Large | 25,000–49,999 kWh | 26.96p/kWh | 147.91p/day |
| Very large | 50,000+ kWh | Bespoke | Bespoke |
WeSave’s own “cheapest” column on the rates page still printed 24.684p/kWh across the micro-to-large bands as of that September snapshot. That is a cheapest-quoted unit rate, not the average, and it still needs a standing charge before it is a bill. I have left it labelled as WeSave’s cheapest column, not as a SwitchSquid winner.
WeSave’s September gas averages, same 4 September review:
| Business size (WeSave) | Annual usage | Avg gas unit rate | Avg standing charge |
|---|---|---|---|
| Micro | 0–4,999 kWh | 10.12p/kWh | 46.85p/day |
| Small | 5,000–14,999 kWh | 9.00p/kWh | 59.84p/day |
| Medium | 15,000–24,999 kWh | 8.94p/kWh | 75.65p/day |
| Large | 25,000–49,999 kWh | 8.97p/kWh | 117.13p/day |
Bionic averages — panel 1–8 September 2026
Source: Bionic business electricity, note on the page: averages received from Bionic’s panel (inclusive of maximum Bionic commission), 1–8 September 2026. Bionic’s size bands are not WeSave’s size bands. A “micro” here starts at 5,000 kWh.
| Bionic size band | Usage band | Unit rate | Standing charge | Their estimated annual bill |
|---|---|---|---|---|
| Micro | 5,000–15,000 kWh | 26.4p/kWh | 91.3p/day | £2,973 at 10,000 kWh |
| Small | 15,000–25,000 kWh | 27.2p/kWh | 107.4p/day | £5,832 at 20,000 kWh |
| Medium | 25,000–55,000 kWh | 26.2p/kWh | 223.8p/day | £11,297 at 40,000 kWh |
| Large | 55,000+ kWh | 26.2p/kWh | 293.9p/day | £15,483 at 55,000 kWh |
Rebuild Bionic’s micro example so you can see the standing-charge bite: 10,000 × 26.4p = £2,640, plus 365 × 91.3p = £333.25, total about £2,973. The standing charge is more than 11% of that bill. On the medium row it is worse: 365 × 223.8p = £817 a year before a single kWh. That is why “26.2p looks cheap” is how finance teams get burned at renewal.
Bionic also still shows a supplier-name table on the same URL with a note that those particular unit rates are 1–10 August 2026 (British Gas 30.1p / 59.2p, SSE 23.7p / 173.5p, Yu Energy 23.9p / 152.0p, and so on, at an assumed 9,234 kWh electricity). I am not ranking those August rows as September winners. If I reprint one, it is only to show that a low unit rate with a 173p standing charge can lose to a higher unit rate with a 60p standing charge. Do the annual sum.
uSwitch is still behind — treat April/August tables as history
On 12 September 2026, uSwitch’s main business-energy hub still showed a table noted as April 2026 Bionic panel data (micro 25.9p / 58.4p). A separate uSwitch business-electricity URL still showed an August 2026 Bionic panel (micro 27.8p / 54.9p). Neither is a September 2026 rate card. If you landed here from a “business electricity rates UK” search and a uSwitch tab is open, close the April one.
Our own business energy hub still cites “Bionic & BusinessComparison, April 2026” in places (commercial electricity 22.6p to 25.3p/kWh). That hub line is stale relative to the September broker pages above. Use this guide for the dated September snapshots; use the hub to start a comparison, then read the quote.
Standing charges, VAT, CCL — the bits a 26p tile hides
- Standing charge. Daily, meter-related, and it has been the quiet rise in 2026. Low-use sites (a small office, a lock-up with a fridge) can pay more in standing charges than in units. Always ask for both numbers.
- VAT. Most business electricity is 20%. A reduced 5% rate exists for qualifying use (de minimis / certain charitable and domestic-like use) — you usually have to declare it. Do not assume 5%.
- Climate Change Levy. Many SME invoices carry CCL on top of the unit rate unless you hold exemption paperwork. Ask whether the quoted pence is CCL-inclusive.
- Capacity / kVA / MOP / HH data. Half-hourly sites pick up extra lines that never appear on a domestic bill. If your MPAN profile class is 00, you are not on a simple SME two-rate quote.
A worked September illustration using WeSave’s micro averages, labelled as an illustration, not a quote: 4,000 kWh × 27.20p = £1,088, plus 365 × 79.61p = £290.58, subtotal £1,378.58 before 20% VAT. After 20% VAT that is about £1,654. Same kWh on Bionic’s micro unit rate but Bionic’s higher standing charge and a 10,000 kWh assumption is a different business. Do not mix the columns.
Compare before renewal — the only habit that matters
Business contracts do not drop you onto a capped SVT when they end. They drop you onto whatever the supplier calls deemed, out-of-contract, or extended supply. Those rates are designed to hurt. The switching window for many SME contracts opens months before the end date (often around two to six months, depending on the supplier and whether you are a microbusiness under Ofgem’s non-domestic rules). Put the end date in the calendar the day you sign.
A sane September checklist:
- Find the contract end date and notice period on the last invoice or the broker portal.
- Pull 12 months of kWh (both fuels if you are dual fuel) and the MPAN / MPRN.
- Ask for quotes at 12, 24 and 36 months. Winter 2026/27 wholesale is messy; a cheap 36-month headline can be a bad lock.
- Compare annual cost = (kWh × unit rate) + (365 × standing charge) + VAT + CCL, not the pence alone.
- Reject blend-and-extend on the first call unless you have a competing written quote in the other hand.
- If you are a home-based sole trader on a domestic MPAN, you may still be under the domestic cap — do not buy a business contract you do not need.
Microbusinesses have extra Ofgem non-domestic protections (clearer contracts, specified information, restrictions on some lock-in tricks). “Microbusiness” in Ofgem’s sense is not the same as WeSave’s 0–4,999 kWh band. If you have fewer than 10 employees and turnover/balance-sheet under the current micro thresholds, read the contract classification before you sign a three-year paper.
Fixed, variable, deemed — pick the product on purpose
- Fixed. Unit rate and standing charge locked for the term. You are buying certainty, not a bet that wholesale falls. Exit is usually ugly.
- Variable / flexible. Can move with the market. Fine if you have time to watch it; poor if you have a shop to run.
- Deemed / out-of-contract. The punishment tariff. Leave it.
- Time of use / HH. Cheaper night or shoulder pence, more admin. Only useful if you can shift load.
I am not going to tell a bakery to “wait for winter to cheapen”. WeSave’s own 7 September piece said there is no reliable way to know whether prices rise or fall from here. That is the honest line. Compare now if you are inside the window; do not wait for a headline.
FAQ — business electricity rates UK September 2026
Is there an Ofgem price cap on business energy?
No. The default tariff cap is a domestic protection. From 1 October 2026 it is £1,723 a year for a typical dual-fuel household on Direct Debit. Business sites have no equivalent ceiling. If you miss renewal, the supplier can put you on deemed or out-of-contract rates.
What is the average SME business electricity rate in September 2026?
It depends whose table you read. WeSave’s 4 September 2026 averages sit around 26.88p–27.20p/kWh by size band, with standing charges from 79.61p to 147.91p/day. Bionic’s 1–8 September 2026 panel averages sit around 26.2p–27.2p/kWh, with much higher standing charges on medium and large bands. Neither figure is your quote.
Why do standing charges matter so much for SMEs?
Because they are daily and they have climbed. On Bionic’s September medium row, 223.8p/day is about £817 a year before usage. A low-use site can spend more on standing charges than on units. Always compare the annual total, not the headline pence.
Should I fix business energy prices now?
Fix if you are inside the renewal window and you want a known pence through winter. Do not automatically take a 36-month cheapest tile. Get 12- and 24-month alternatives in writing. There is no cap to “beat” and no official forecast I will invent for January 2027 business rates.
Do I pay 20% VAT on business electricity?
Usually yes. Some qualifying use is 5%. You typically have to tell the supplier. Domestic electricity VAT falls to 0% from 1 October 2026 to 31 March 2027 — that cut is not a business-electricity giveaway.
How long does a business electricity switch take?
Non-domestic switches often complete around the existing contract end date, with a few weeks of industry process. You can usually agree a new contract months ahead so you are not dumped onto out-of-contract rates. Supply should not go off during a switch.
Where should I compare live business energy after this guide?
Start on SwitchSquid’s business energy hub with your postcode, usage and MPAN if you have it. Then read the broker or supplier quote, including standing charge, VAT and term. Editorial averages here are labelled WeSave (4 Sep 2026) and Bionic (1–8 Sep 2026). They are not SwitchSquid live quotes.
Bottom line
For business electricity rates UK September 2026, remember the rule the domestic pages get to ignore: no Ofgem cap. Dated broker snapshots sit around the mid-to-high 26p/kWh with standing charges that can run from about 80p/day on a WeSave micro average to well over 200p/day on Bionic’s medium band. Compare the annual sum before renewal, not the pence on a sales email. uSwitch and some of our own hub copy are still carrying April 2026 figures — this page is the September one. Get a written quote on the hub, then buy the contract, not the screenshot.
