One account is convenient. Compare both fuels before deciding what is better value. Use the same assumptions for every offer and verify the latest terms directly.
Build two independent estimates
Calculate electricity and gas separately using the same annual usage for each option. Then add them. A dual-fuel discount should not replace checking the final unit rate and standing charge for each fuel.
Account for both standing charges
A bundled bill can still include separate fixed charges for electricity and gas. Ask for each annual charge and include them even if one fuel has very low consumption. Small households can be particularly sensitive to fixed costs.
Separate convenience from price
One supplier, one portal and a shared billing schedule may be useful. Give that convenience a value you are comfortable with, rather than assuming a bundle is automatically cheapest. Two suppliers may produce a lower total while requiring more administration.
Check conditions on bundle benefits
Confirm whether a credit depends on taking both fuels, keeping the contract for a minimum period or paying by a particular method. Avoid counting the same welcome credit twice. If contracts end on different dates, check whether changing one creates an exit charge.
Compare year two as well
A first-year saving can disappear when a discount expires. Note both renewal dates and evaluate the ongoing rates if available. Keep a reminder for each contract so a convenient bundle does not become an unnoticed long-term cost.
Sources & review notes
This guide explains our comparison approach and calculation methods. Numerical examples are illustrative and do not represent supplier offers.
Reviewed 9 October 2026. Prices, grant conditions and provider terms can change. Check the relevant provider or official body before acting.
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