Find the best energy deals in Cardiff, Wales. Compare gas and electricity tariffs for CF-postcode households and beat the current Ofgem Energy Price Cap (£1,663/year for a typical dual-fuel household in Q3 2026 (from 1 July 2026)). Cardiff has approximately 155,800 households across a population of around 373,300, all served by CF postcodes.
Cardiff's electricity is distributed by National Grid Electricity Distribution (South Wales) and gas by Wales & West Utilities — the same physical infrastructure regardless of which energy supplier you choose. Switching supplier causes zero interruption to your supply. Utility Warehouse offers a Fixed Saver tariff priced £50 below the Ofgem Price Cap, available to Cardiff (Caerdydd) households who bundle two or more home services.
Outfox Energy Fix'd 12M Rolling — 20.80p/kWh elec, 57.86p/day, est. ~£773/year (elec only). E.ON Next Fixed 12M — 21.30p/kWh elec, 57.86p/day, est. £786/year (elec only). Sainsbury's Energy Fix & Save 15M — 22.22p/kWh, 57.86p/day, est. ~£811/year (elec only). Utility Warehouse Fixed Saver — dual-fuel, below £1,663 cap, ~53p/day standing charge, bundle discount applied.
Standard single-rate meters: most common across CF postcodes, all tariffs available. Economy 7 dual-rate meters: common in older Cardiff terraces (Pontcanna, Roath, Canton) with overnight storage heating — cheaper off-peak rate applies 23:00–07:00. Smart meters: increasingly common in Cardiff Bay and newer developments — enables time-of-use tariffs and real-time usage monitoring. Prepayment meters: pay-as-you-go across all Cardiff areas, a separate Ofgem cap applies.