| Factor | Effect |
|---|---|
| Usage (kWh) | Property size, heating, occupants |
| Unit rate | Capped by Ofgem – check current cap |
| Standing charge | Daily fee – varies by supplier |
| Payment method | Direct debit often cheaper |
Source: Ofgem
Key links
- Ofgem – energy price cap and typical use
- ofgem.gov.uk – Price cap
- Compare energy deals
- Ofgem – Consumer guide
What affects your energy bill?
Your bill is driven by how much gas and electricity you use (in kWh), the unit rate you pay per kWh, and the daily standing charge. Property type, insulation, heating system, and number of occupants all affect usage. Ofgem publishes a "typical domestic consumption" figure (e.g. 2,700 kWh electricity, 11,500 kWh gas per year for a medium home) and a price cap that limits what suppliers can charge per unit and standing charge. Actual bills vary widely above or below that.
Typical costs – use official figures
Energy prices change frequently. For up-to-date typical bills and the level of the price cap, check Ofgem's price cap page. They show typical annual costs for direct debit, prepayment, and other payment methods. Swindon is not charged differently from the rest of England – the same cap and market apply.
How to reduce your bills
Use less energy where you can (thermostat, insulation, efficient appliances), fix leaks and dripping taps, and compare tariffs. If you're on a standard variable tariff, switching to a competitive fixed deal when available can save money. See energy suppliers in Swindon and cheapest energy deals in Swindon for how to compare and switch.
Help with bills
If you're struggling to pay, contact your supplier first. They can agree a payment plan. You may also be eligible for support such as the Warm Home Discount or grants from the council or charities. Citizens Advice and GOV.UK have the latest on help available.
Ofgem price cap and typical use
Current cap, typical annual costs by payment method.
Ofgem – Energy price capInformation correct as of February 2026. Energy prices and the cap change. Always use Ofgem and your supplier for current figures.