Greater Belfast’s Best Offer* for firmus Domestic Credit Customers based on customers using an annual consumption of 13,685kWh***, or lower, calculated using the firmus energy Greater Belfast Home Gas Tariff – Credit Meter Online with introductory 24% discount and Online Account Discount applied in comparison to the SSE Direct Debit Budget Plan including SSE Airtricity Discount. For customers who use more than 13,685kWh this will not be the best offer. Actual average consumption varies due to weather conditions, changes in energy efficiency and householder behaviour.Customers who avail of this introductory offer will see a 24% discount off the standard Greater Belfast Home Gas Tariff – Credit Meter Online or Offline (subject to customer choice of tariff) as a separate line on their bill. Contact us and we will be happy to talk you through our rates, the 24% Welcome Discount (Domestic)* or any queries that you may have. Correct as of 31/03/2026. Verify at Best Offer* New customer offer only, terms and conditions apply 24% Welcome Discount (Domestic) T&Cs.***13,685 kWh is the average consumption for a firmus Domestic customer with a credit meter in the Greater Belfast area.

Greater Belfast’s Best Offer** for the Average firmus Domestic PAYG (Pay As You Go) Customer: Comparison is based on effective unit rates which include all supplier discounts and welcome credit in Belfast, effective from 1st April 2026, and calculated using the firmus energy average consumption for customers with a Pay As You Go meter in the Greater Belfast area, this being 7,734 kWh per year.Customers obtain firmus energy’s effective unit with an average consumption of up to 7,734 kWh**. If your annual usage is above this, it is not the best unit rate. Actual average consumption varies due to weather conditions, changes in energy efficiency and householder behaviour.Contact us and we will be happy to talk you through our rates, the Welcome Bonus* or any queries that you may have. Correct as of 31/03/2026. Verify at Best Offer*. New customer offer only, terms and conditions apply £200 Welcome Bonus** T&Cs.