Compare current gas and electricity tariffs in Cardiff, Wales. Rates and any saving depend on your CF postcode, usage, meter, eligibility and current tariff terms; compare the quote with the Ofgem reference (£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. The physical supply normally continues during a supplier change; your new supplier should confirm the transfer process and date. Any Utility Warehouse fixed option, rate, service requirement and discount depend on the current tariff, address, eligible services and personalised quote.
Have your full CF postcode, annual electricity and gas usage in kWh, meter type and current contract ready. Compare offers using the same usage, unit rates, standing charges, annual cost, term, exit fees and any bundle conditions. The prices below are dated South Wales benchmarks, not live postcode-specific quotes or a whole-market ranking. Compare with your own bill.
Welsh Government Nest offers free impartial energy advice and may provide efficiency improvements subject to eligibility. Cardiff Council's energy pages cover help with bills and local schemes, including support information for Splott, Adamsdown and Fairwater. Neither resource requires switching supplier.
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; unit rate, standing charge, eligibility and annual cost require a current personalised quote.
Standard single-rate meters are most common across CF postcodes. Economy 7 dual-rate meters are common in older Cardiff terraces (Pontcanna, Roath, Canton) with overnight storage heating — cheaper off-peak rate applies 23:00–07:00. Smart meters are increasingly common in Cardiff Bay and newer developments. Prepayment meters are also used; confirm meter compatibility and tariff availability in the current quote.