Ofgem’s October 2026 Energy Price Cap Rise: What Homeowners Should Do Before Winter

Ofgem has announced that the energy price cap will rise by 4% for the period from 1 October to 31 December 2026. The timing matters: the higher rates will take effect just as households begin using their heating more regularly, so even a relatively modest percentage increase could be noticeable on winter bills.

This is not simply a story about paying 4% more. A home’s actual increase will depend on its energy use, tariff, payment method, regional rates and heating efficiency. Two neighbouring properties could face very different bills even if both are covered by the same price cap.

For homeowners in Bordon, Whitehill, Liphook, Alton, Farnham and Haslemere, the practical priority is to make sure the heating system is not wasting expensive energy. That means understanding how the cap works, checking the boiler and controls, and fixing avoidable efficiency problems before cold weather exposes them.

What Ofgem has announced

On 26 August 2026, Ofgem confirmed a 4% rise in the default energy price cap for the final three months of the year. The new cap applies from 1 October until 31 December 2026, after which it will be reviewed again under Ofgem’s quarterly process.

The regulator adjusts the cap to reflect changes in wholesale energy prices and other regulated costs involved in supplying electricity and gas. Although the cap provides protection from unrestricted default-tariff pricing, it does not freeze household bills or guarantee a maximum total payment.

The widely quoted “typical household” figure is an illustration based on assumed consumption. Your supplier still charges for the energy you use. A larger, poorly insulated property with older heating controls can therefore spend considerably more than the typical figure, while an efficient home using less energy may spend less.

What the price cap actually controls

The price cap limits the rates suppliers can charge customers on covered default tariffs. Those charges are principally made up of:

• The unit rate: the price paid for each kilowatt-hour of gas or electricity consumed.
• The standing charge: the daily charge for remaining connected to the energy network, regardless of how much energy is used.

Rates can vary by region, fuel, meter and payment method. Customers on fixed tariffs are normally governed by the terms of their contract rather than the current default-tariff cap. Business energy contracts are also outside the domestic price-cap system.

Homeowners should therefore check their own tariff rather than assuming every energy account will rise by exactly 4% on 1 October. The tariff information shown on a recent statement should confirm whether the account is fixed, variable or otherwise covered by the cap.

Why a 4% rise can feel larger during winter

The increase begins at the start of the main heating season. Gas consumption is highly seasonal: a household may use relatively little in summer but consume several times as much during a cold winter month. Applying a higher unit rate to that heavier usage can make the change feel more significant than the headline percentage suggests.

As a simple illustration, 4% of £1,800 is £72. That does not mean every household will pay exactly £72 more, because the calculation depends on future consumption and the balance between unit rates and standing charges. It does show why seemingly small percentage changes matter when applied to a substantial annual energy budget.

Reducing the thermostat or switching the heating off is not always the best answer. Homes need adequate heating to remain comfortable and to control condensation, damp and mould. The more sensible approach is to produce the required warmth efficiently and avoid heating empty rooms or running the boiler at unnecessarily high temperatures.

What the change means technically for gas heating

A modern condensing boiler is designed to recover heat from water vapour in its flue gases. It performs this most effectively when the water returning from the radiators is cool enough to encourage condensation inside the boiler’s heat exchanger.

In practical terms, many boilers operate more efficiently when their central-heating flow temperature is lower than the traditional maximum setting. The ideal setting depends on the size of the radiators, the heat loss of the property and the weather. A system that can heat the house with a flow temperature of around 55°C to 65°C may use less gas than one permanently running at 75°C or 80°C.

Lower is not automatically better. If the temperature is reduced too far, undersized radiators may struggle to warm the rooms, particularly during a cold spell. The boiler could then run continuously without achieving the target temperature. The aim is to find the lowest flow temperature that still heats the property properly.

On a combi boiler, homeowners can often adjust the radiator circuit independently from the domestic hot-water setting. With a conventional boiler and hot-water cylinder, changes require greater care. Stored hot water must be managed at a safe temperature, and the cylinder thermostat should not simply be turned down in an attempt to save money because of the risk associated with bacterial growth.

Controls can be as important as the boiler

Even an efficient boiler can waste gas when paired with poor controls. Common problems include a thermostat located in an unusually warm or draughty position, thermostatic radiator valves that are stuck, and programmers that heat the property when nobody is home.

Weather compensation and load compensation controls can improve performance by varying the boiler temperature according to outdoor conditions or the difference between the room temperature and its target. Instead of repeatedly firing at maximum output, a compatible boiler can run for longer at a lower, steadier level. This often improves comfort as well as efficiency.

Radiator balancing also matters. If radiators near the boiler become hot quickly while distant rooms remain cool, water may not be distributed evenly around the system. Occupants often respond by raising the thermostat, causing already-warm rooms to overheat while the colder areas still struggle. Correct balancing can reduce this imbalance without increasing total heat demand.

What the announcement means locally

Our area contains a wide range of housing, from newer developments around Bordon and Whitehill to older cottages, terraces and larger detached properties across Liphook, Alton, Farnham and Haslemere. That variety makes a single “typical bill” particularly unhelpful.

Newer homes may retain heat well but can still waste energy through incorrect boiler settings or poorly configured controls. Older buildings may have greater heat loss through solid walls, suspended floors, draughty doors or limited loft insulation. Properties in more exposed or rural locations can also cool faster during windy weather.

Heating systems vary just as much. Some homes have modern modulating combi boilers, while others rely on conventional boilers, cylinders and older radiators. A price rise affects all of them, but the best efficiency improvements will not be the same in every property.

Local homeowners should focus on the relationship between the building and its heating system. Installing a new control will not compensate for a radiator that is too small, while replacing a boiler will not cure heat loss through an uninsulated loft. The most cost-effective plan starts with identifying where energy is actually being wasted.

Practical steps to take before 1 October

1. Check the tariff. Confirm whether the account is fixed or variable, note the contract end date and compare the present unit rates and standing charges with the supplier’s October rates.
2. Submit accurate meter readings. Read both gas and electricity meters close to the tariff-change date. This helps prevent consumption from being estimated across two different price periods. Smart-meter users should still check that readings are being transmitted correctly.
3. Review heating schedules. Set heating periods around the household’s real routine. Avoid programming long periods simply because the boiler takes too long to warm the house; slow heating may indicate a system fault or poor setup.
4. Test every radiator. Check for cold tops, cold bottoms, noisy flow or rooms that never reach temperature. Cold sections can indicate trapped air, restricted circulation, sludge or balancing issues. Repeated bleeding suggests an underlying problem that needs investigation.
5. Check boiler pressure. A sealed system should remain within the manufacturer’s recommended range. Frequent pressure loss, large pressure swings or regular topping-up can point to a leak, expansion-vessel issue or pressure-relief fault.
6. Adjust temperatures carefully. Consider reducing the central-heating flow temperature in small steps while monitoring comfort. Do not confuse this with the temperature of stored domestic hot water.
7. Deal with draughts and insulation gaps. Loft insulation, effective door seals and sensible curtain use can reduce heat loss. Air vents installed for combustion or moisture control must not be blocked.
8. Arrange maintenance before demand peaks. A boiler that is overdue for servicing, making unusual noises or showing intermittent faults should be checked before it is required to work continuously. Servicing also includes safety checks and can identify deterioration before it becomes a winter breakdown.

Should you fix your energy tariff?

A fixed tariff may provide certainty, but it is not automatically cheaper. Compare the complete offer, including unit rates, standing charges, contract duration and exit fees. It is also worth considering that Ofgem will review the cap again after December, so today’s variable rate does not indicate what prices will do throughout an entire fixed term.

The most reliable saving is energy that the property does not need to use. Tariff decisions affect the price of each unit, while good controls, correct boiler operation and reduced heat loss affect how many units are purchased in the first place.

The October increase makes early preparation worthwhile. A heating system that warms rooms evenly, responds correctly to its controls and allows a condensing boiler to operate efficiently will be better placed to manage higher winter rates without compromising comfort.

For professional boiler, heating-control or radiator advice in Bordon, Whitehill, Liphook, Alton, Farnham or Haslemere, contact Embassy Gas: (01420) 558993 | helpdesk@embassygas.com | https://www.embassygas.com/book