⚡ Energy Tariff Comparator

Suppliers advertise the unit rate because it is the flattering number, but the standing charge is paid every single day whether you use anything or not. This compares the real annual cost — and, more usefully, tells you the exact usage at which the ranking flips.

Tariffs to compare
Fuel / name Unit (p/kWh) Standing (p/day)
Add a couple of tariffs you are actually being offered, including your current one, and see what they really cost.
Why the standing charge changes everything

A tariff with a low unit rate and a high standing charge rewards heavy users. A tariff with a high unit rate and a low standing charge rewards light users — and for someone in a small flat who is out all day, or who has solar and imports very little, the difference can be over £100 a year. The crossover point is (standing₂ − standing₁) × 365 ÷ (unit₁ − unit₂), and this calculates it for you.

Read your meter rather than trusting an estimate, and read it on the same day you switch so the closing bill is accurate. Figures here exclude any exit fees, direct-debit discounts or smart-meter rewards, which you should add yourself.