Electricity tariff comparison calculator UK
Compare two single-rate electricity tariffs using the same annual consumption. Check the formula, worked example and limits before using your own figures.
Enter your figures
Annual cost B minus A
Inputs changed. Select Calculate result to update your estimate.
Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. A 365-day single-rate comparison at unchanged consumption and rates. Not an offer search; include relevant fees and use VAT-inclusive prices consistently.
How the electricity tariff comparison calculator uk works
Annual tariff cost = kWh × unit price + 365 × daily standing charge + included fees.
Data basis: mathematical formula using your inputs. Example prices and rates are illustrative, not current market quotes.
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Worked example: electricity tariff comparison
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Annual electricity usage (kWh)
- 3,000
- Tariff A pence per kWh
- 26
- Tariff A standing pence per day
- 55
- Tariff B pence per kWh
- 25
- Tariff B standing pence per day
- 60
- Tariff B additional annual or switching fees (£)
- 0
Annual cost B minus A: −£11.75
Annual tariff cost = kWh × unit price + 365 × daily standing charge + included fees.
Electricity tariff comparison: questions answered
What does the electricity tariff comparison calculation include?
Annual tariff cost = kWh × unit price + 365 × daily standing charge + included fees. Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. A 365-day single-rate comparison at unchanged consumption and rates. Not an offer search; include relevant fees and use VAT-inclusive prices consistently.
Using your result
Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.
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