Direct debit supported Cash supported
Exclusive Fixed Energy v51
Ends 31 May 2026
View tariff pageFixed Tariff Sep27 v1
Tariff details for British Gas, including contract notes, price ranges and the supporting metadata we currently hold.
Official ismybillfair partner
Direct debit supported Cash supported
End date
30 September 2027
Contract length
18 months
Electricity code
XN3
Gas code
YN3
Tariff overview
Fixed Tariff Sep27 v1 is a 18 month fixed tariff released on 3 March 2026. It is due to end around 30 September 2027. This tariff is not currently available for new switches. This type of tariff is usually aimed at customers who want price certainty for a set period, so the main things to review are the tariff end date, any exit fees, and what happens when the fixed term finishes.
Key points
- British Gas's Cheapest Deal
Contract snapshot
- Contract length
- 18 months
- Exit fee
- £100
- Smart meter
- Not required or not listed
- Cash payments
- Supported
Price ranges by region
These summaries show the range of rates we currently hold across regions, rather than one national figure.
Electricity
Regions listed: 14
Direct debit standing charge: 45.63p to 70.94p
Direct debit unit rate: 26.68p to 29.08p
Cash standing charge: 53.87p to 79.61p
Cash unit rate: 28.16p to 30.69p
Gas
Regions listed: 14
Direct debit standing charge: 34.49p to 35.56p
Direct debit unit rate: 5.79p to 6.15p
Cash standing charge: 42.83p to 42.85p
Cash unit rate: 6.09p to 6.47p
Multi-rate electricity
Regions listed: 14
Direct debit standing charge: 45.66p to 70.14p
Direct debit day rate: 32.73p to 35.94p
Direct debit night rate: 14.92p to 16.36p
Cash day rate: 34.30p to 37.70p
Cash night rate: 16.02p to 17.53p
Terms
energy-terms/ZT5N5mbDf2JWua4adHDKR5ShYGN9PQj2J8IEchEY.pdf
Related tariffs
Direct debit supported Cash supported
Exclusive Fixed Energy v52
Ends 31 May 2026
View tariff page Direct debit supported Cash supported
Exclusive Fixed Energy v53
Ends 31 May 2026
View tariff page Direct debit supported Cash supported
Exclusive Fixed Energy v59
Ends 31 May 2026
View tariff pageSave with your current British Gas tariff in just 60 seconds
Enter your postcode to get started
We'll check your suppliers best deals
Don't just take our word for it
Join households across the UK who asked ismybillfair