UtilityPilot

Free tool

Energy Price Cap Calculator

Enter your postcode, annual electricity and gas usage (kWh), and payment method to estimate costs using Ofgem-style unit rates and standing charges. See how usage and fixed daily charges combine into annual, monthly and weekly figures.

Typical UK home: around 2,700 kWh per year.

Typical UK home: around 11,500 kWh per year.

Save this result and track your bills

Create a free UtilityPilot account to save bills, compare future changes, organise household costs and get reminders before due dates.

Create free accountTry another free tool

Related free tools

How the energy price cap works

Ofgem’s energy price cap sets maximum unit rates and standing charges for default tariffs — it does not cap your total annual bill. If you use more energy, you pay more; if you use less, you pay less.

The cap is reviewed quarterly. Regional network costs and how you pay (direct debit, standard credit or prepayment) can change the rates that apply.

What this calculator estimates

We multiply your annual kWh by the demo unit rate for electricity and/or gas, add a full year of standing charges, then split the total into monthly and weekly averages for budgeting.

Figures assume a single-rate electricity meter. Economy 7, multi-rate meters, warm home discount and supplier-specific discounts are not included in this MVP.

Why postcode matters

Price cap unit rates and standing charges vary by electricity distribution region and gas network area. Postcode lookup helps show where you live; until full Ofgem region mapping is imported, we may use a labelled demo region.

Why your bill may differ

Fixed tariffs, exit fees, debt repayments and time-of-use rates can make your real bill higher or lower than this estimate. Your supplier’s bill is the authoritative figure.

How UtilityPilot helps after the estimate

Upload bills to extract unit rates, periods and totals automatically, set payment reminders, and compare month-on-month spend with council tax, water and broadband in one household dashboard.

Explore more on free tools, read our blog, or return to the UtilityPilot home page.

More free tools

Explore other household calculators from UtilityPilot.

Frequently asked questions

  • Is the energy price cap the maximum I can pay?

    No. The cap limits unit rates and standing charges on default tariffs, not your total bill. Higher usage means a higher bill, even when rates are capped.

  • Why do I need to enter my postcode?

    It helps show your area and, when mapping is available, select the Ofgem region for rates. Until full mapping is live, we label any demo region clearly.

  • What is a standing charge?

    A fixed daily charge covering network and supplier costs to supply your home, whether or not you use energy that day. It is shown in pence per day and multiplied by 365 for an annual figure here.

  • What is a unit rate?

    The price per kilowatt hour (kWh) of electricity or gas you use. Usage cost is your annual kWh multiplied by this rate.

  • Does this calculator support Economy 7?

    Not in this version. Economy 7 and other multi-rate meters need separate day and night usage, which we plan to add later.

  • Can I upload my real bill instead?

    Yes. Use the free AI bill check on /tools/free-bill-check or create a UtilityPilot account to upload bills to your workspace for extraction and reminders.

  • Are these results exact?

    No. They are guidance from a demo Ofgem-style dataset until official regional rates are imported. Always check your supplier bill for the amount due.