🔍What We Know So Far
Confirmed: £1,723 a year from 1 October 2026.
Ofgem published the cap for 1 October to 31 December 2026 on Wednesday 26 August 2026. A typical dual-fuel household paying by monthly Direct Debit will pay £1,723 a year — up 3.6%, or about £60, on the £1,663 running since July. Ofgem rounds that to 4%. Every figure below is now the confirmed rate rather than a forecast.
To read the rise properly you need the baseline. Under the July 2026 cap, a typical dual-fuel household paying by direct debit faces £1,663 a year — a 13% rise on the April–June quarter, which restates to £1,489 on the same basis. Those are the rates you pay until 30 September; the new ones take over the next day.
If those figures look lower than the ones you remember, that's the yardstick moving rather than the price. From 1 July 2026 Ofgem updated its typical domestic consumption values to reflect how much less energy households now use — electricity down from 2,700 to 2,500 kWh a year, gas from 11,500 to 9,500 kWh. The identical cap that was announced as £1,862 on the old basis is quoted as £1,663 on the new one, and April's £1,641 becomes £1,489. Your unit rates are unaffected; only the illustration changed.
The two columns above are not like for like on electricity, and this is the single most misreported detail of this announcement. Ofgem quotes cap rates including VAT. July's 26.11p includes 5% VAT; October's 26.32p includes 0%, because the electricity VAT cut lands on the same day. So the underlying pre-tax electricity price rose considerably more than the 0.8% headline suggests — the tax cut is absorbing most of it. Gas keeps its 5% VAT throughout, so the gas figures do compare directly, and that 8.7% jump is entirely real.
Ofgem has confirmed the cap would have risen by around 6% without the VAT cut, which makes the electricity relief worth roughly 2.5 percentage points off the headline. It is a genuine saving. It just arrived as a smaller rise rather than as money back.
🗓️When Is the October Price Cap Announced?
Ofgem sets the cap quarterly and announces each level roughly five weeks before it takes effect. The October–December 2026 level was confirmed on 26 August 2026 and takes effect on 1 October 2026. The January–March 2027 cap follows in late November.
The level isn't plucked from the air on announcement day — it's calculated from costs observed during a fixed assessment window running 19 May to 18 August 2026. That window is the reason forecasts tighten as summer goes on: with every week of wholesale market data that lands inside it, less of the calculation is guesswork.
📊Forecast vs Confirmed — How Close Were They?
Now the cap is confirmed, the forecasts can be marked. We publish this because a forecaster's track record is the only sensible basis for judging their next prediction — and there is already a January 2027 forecast on the table.
The consultancy most widely quoted on cap forecasting landed within £14 of Ofgem, or under 1%. That is a good result and consistent with their record: their pre-announcement estimates have repeatedly come within a few pounds. It is the reason we quote them rather than the wider spread of forecasts circulating online.
The gas unit rate rose 8.7% while electricity rose 0.8% and the electricity standing charge fell 4.1%. Wholesale gas firmed through the assessment window, driven partly by unrest in the Middle East, and gas is where that fed through. A household heating with gas therefore feels this rise far more than an all-electric one.
Ofgem has said the cap would have risen around 6% without the electricity VAT cut, so the relief is worth roughly 2.5 percentage points. It is real money, but it arrived as a smaller increase rather than as a reduction — which is why the government's headline £45 saving and what people actually see on their bills are different things.
On the same consumption basis as October's £1,723, that would be a further 8.7% jump — far bigger than this one. On Ofgem's old basis the same forecast reads as £2,107, so check which basis any figure you see is using. Ofgem confirms the January cap in late November; this is a forecast, not a decision.
The confirmed rise is 3.6% — about £5 a month on a typical bill. Modest in isolation. What changes the picture is the January forecast sitting behind it: another 8.7% would add roughly £149 a year on top, and that lands in the depth of winter when consumption is at its highest.
That combination is why the fixing argument has strengthened. Martin Lewis has said people on the cap should fix, noting the cheapest fixes sit around 7% below the current cap level. Our guide on whether to fix works through when locking in genuinely earns its keep — and when it doesn't.
If you want to understand how these forecasts are built and how well they've held up historically, our price cap predictions guide walks through the mechanics.
🧾The Electricity VAT Cut Lands on the Same Day
This is the part that will make October's headline numbers confusing, so it's worth getting straight now. On 21 July 2026, new Prime Minister Andy Burnham announced that VAT on domestic electricity will be cut from 5% to 0%, running from 1 October 2026 to 31 March 2027.
Two things to be clear about. First, it applies to electricity only — gas keeps its 5% VAT. Second, it starts on 1 October 2026, the exact same day the new price cap takes effect.
Why the headline numbers will look odd
Ofgem's cap figures normally include 5% VAT — today's 26.11p/kWh electricity rate is a VAT-inclusive number. From 1 October, electricity rates under the cap will be restated without VAT. So you may see an electricity unit rate that looks lower than today's even if the underlying wholesale-driven cost has gone up. A cap rise and a tax cut arriving on the same date can partly cancel each other out on paper.
- Don't compare October's electricity rate directly to July's — one includes VAT, the other won't
- Gas is unaffected — the 5% VAT stays on gas, so any gas movement in the cap is a clean comparison
- The relief is temporary — it currently runs only to 31 March 2027, which is why a further rise is being forecast for January and beyond
- Electricity-heavy homes gain most — heat pumps, EVs and all-electric properties see proportionally more benefit than gas-heated ones
Our full electricity VAT cut guide breaks down what the change is worth to different household types and how it interacts with smart tariffs.
🏠What It Means for a Typical Household
If the central forecast is roughly right, a typical household is looking at around £3 a month more — a figure that is already net of the VAT cut, which pushes in the opposite direction on the electricity half of your bill. That's a materially smaller swing than the 13% jump in July.
But the timing matters more than the size. October is when heating goes back on. Even an unchanged cap means bills climb sharply in real terms through autumn simply because you're using more energy — and the October rates run through the whole of the first winter quarter.
The perennial point worth repeating: the price cap is not a cap on your total bill. It limits the unit rates and standing charges a supplier can charge on a default tariff. The typical-household figure is an illustration of what average usage costs, nothing more. Use less and you pay less — which is why the actions that reduce winter bills are the same regardless of what the January cap is announced in late November.
🤔Should You Fix Before October 2026?
With the announcement still weeks away and forecasts disagreeing by over £150, this is a genuine judgement call rather than a question with an obvious answer. The honest version:
- A 2% rise is a weak case for fixing — around £3 a month is inside the margin by which forecasts routinely miss, and it's a small thing to buy twelve months of inflexibility for
- Fix anyway if certainty has real value to you — a tight budget with no headroom for a winter surprise is a perfectly good reason, and it doesn't require you to have a view on wholesale gas
- The catch: fixed deals priced now already reflect the market's expectations, so a fix that looks cheap is pricing in an expected fall rather than handing you free money
- The VAT is not a wrinkle: VAT is a tax on the supply, not part of your tariff, so the 0% rate reaches fixed customers too from 1 October — your locked rate excluding VAT stays put and the amount you pay falls
- Smart tariffs are the third route — Octopus tariffs like Tracker and Agile follow wholesale prices, so they respond to market falls immediately rather than waiting for the next quarterly cap
- Changing your mind is free — Octopus charges no exit fees on any tariff, fixed included, so you can fix ahead of January and still move later without penalty if the market turns
There isn't a universally right answer here — our fixed vs variable guide walks through the comparison properly, and the Octopus Fixed page covers the rates. What is clear is that sitting on a default tariff with an expensive supplier is the one option that loses in every scenario.
⚡How to Get Ahead of the October Cap
You can't control what Ofgem announces, but you can control what it applies to. The cap is a ceiling on default tariffs — it says nothing about how low your rates can go. And with electricity VAT dropping to zero from the same day, tariffs that lean on electricity get a second tailwind:
Your unit rate moves with the wholesale market each day, so you don't wait a full quarter for falls to reach you — and because the October cap is now locked to a window that has closed, a Tracker customer feels any autumn softening months before a Flexible customer does. Built-in caps of 100p/kWh electricity and 30p/kWh gas protect against extreme spikes.
Prices change every 30 minutes and drop well below cap level overnight and when renewable generation is high. Shift the dishwasher, washing machine and charging into cheap slots and your effective rate falls — whatever the headline cap does in October.
For EV drivers this is the clearest cap-beater: overnight charging at around 7p/kWh against a cap electricity rate of 26.11p/kWh, with smart scheduling handled automatically. As an electricity-only tariff, it also benefits fully from the 0% VAT change.
Discounted scheduling windows sized to heat pump running patterns, typically saving around £219/year versus a gas boiler. With gas keeping its 5% VAT while electricity drops to 0%, the arithmetic for electrified heating improves further from 1 October.
Four things worth doing before 1 October regardless of the announcement:
- Check your Warm Home Discount eligibility before 23 August — the qualifying date for this winter's £150 discount falls three days before the cap announcement, and 2.7 million more households now qualify
- Switch and bank the £50 — the referral credit is certain in a way no forecast is, and it lands in your account when you switch via our link
- Submit a meter reading around 30 September — so your pre-October usage is billed at the old rates rather than estimated across the boundary
- Check when your fix ends — if it expires this autumn, you'll roll onto a cap-governed variable tariff, so decide before that happens by default
Our saving money guide covers stacking the £50 credit with the right smart tariff and Octoplus rewards, and how switching works walks through the five-minute process end to end.
✅Verdict — Prepare, Don't Predict
Verdict: A manageable rise now, and a much larger one forecast for January. That is the part worth acting on.
Ofgem confirmed the October–December cap on 26 August at £1,723, up 3.6% on July's £1,663 — about £5 a month. Gas drove almost all of it, rising 8.7%, while the electricity standing charge fell 4.1% and the 0% VAT absorbed what would otherwise have been a roughly 6% increase. Taken alone that's a rise most households can absorb. The reason to act is what comes next: Cornwall Insight forecasts about £1,872 for January on the same basis, a further 8.7% arriving exactly when winter consumption peaks. Martin Lewis has said people on the cap should fix. If you do, do it somewhere with no exit fees, so the decision stays reversible.
Octopus Energy supplies 7.3 million UK households, has been Which? Recommended for 9 consecutive years, and holds a 4.8/5 Trustpilot rating from 800,000+ reviews — with no exit fees on variable tariffs, so switching before the announcement costs you nothing in flexibility. Compare every Octopus tariff before October, and check back here on 26 August for the confirmed figures.