The unit rate and daily standing charge need to be considered together.
The useful answer
Energy bills normally combine a unit rate based on use and a daily standing charge paid even when you use nothing. Higher-use homes are more affected by the unit rate; lower-use homes should watch the standing charge. Do not compare only a supplier’s “typical annual cost”.
How to compare
Use your actual annual kWh figures, estimate usage at each tariff’s unit rate, then add 365 days of standing charges. The price cap is not a cap on a household’s total bill; the final cost still depends on usage.
Regional differences
Standing charges, payment method and region affect the figures. Use a written quote based on your postcode and payment method.