Firmus KeyPad AnytimeSaver
25% off
✓ No credit check required
✓ Top up online, in-store or via the app
✓ Keypad meter included
✓ Always know your balance on your keypad
✓ No exit fees
Energy plans for your home
For existing customers, you can see your tariffs and rates here
Firmus KeyPad EV Saver
7.5% off
✓ No credit check required
✓ Lower overnight rate for EV charging
✓ Keypad meter included
✓ No exit fees
Switching to Firmus Energy is easy
- Get a quote
- Choose your tariff
- Set up your account
- Complete
Switch to Firmus Energy for clarity you can trust. Our bills are easy to understand, our packages are built around what works best for you and our expert team is always on hand to help. As a trusted Northern Ireland energy partner, we deliver real value and peace of mind every time.
Is Firmus available in your area?
We currently supply natural gas to homes across Northern Ireland. Check whether your home is within our gas network.
Need more help switching to Firmus?
Call us
Monday to Thursday: 9am to 5pm
Friday: 9am to 3:30pm
Email us
Get quick answers via email from our support team.
Tariff FAQs
Check out the popular questions about our tariffs.
Greater Belfast’s Cheapest Offer* for Domestic Credit Customers: Based on customers on the firmus energy Greater Belfast Home Gas Tariff – Credit Meter Online with introductory 25% discount applied in comparison to the SSE Airtricity Tariff - Direct Debit Budget Plan. The Welcome Discount offer is subject to a 12-month contract*. Customers who avail of this introductory offer will see a 25% discount off the standard Greater Belfast Home Gas Tariff – Credit Meter Online as a separate line on their bill. Contact us and we will be happy to talk you through our rates, the 25% Welcome Discount (Domestic)* or any queries that you may have. Correct as of 15/10/2026. Verify at Cheapest Offer* New customer offer only, terms and conditions apply 25% Welcome Discount (Domestic) T&Cs*
Greater Belfast’s Cheapest Offer* for the average firmus Domestic PAYG (Pay As You Go) Customer: Based on customers with an annual consumption of 7,734 kWh**, or lower, calculated using a firmus energy effective unit rate, in comparison to the SSE Airtricity Tariff – Prepayment Meter Pay As You Go. The Welcome Bonus offer is subject to a 12-month contract**. The effective unit rate is calculated using annual consumption of 7,734 kWh** at the firmus energy Greater Belfast Home Gas (PAYG) Tariff with £200.00 Welcome Bonus applied. Customers who use more or less than 7,734 kWh** per year will not receive the firmus energy effective unit rate. If your annual usage is above this, it may not be the cheapest offer and for any customer using 10000 kWh or more per year this is not the cheapest offer. 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 15/10/2026. Verify at Cheapest Offer. New customer offer only, terms and conditions apply £200 Welcome Bonus T&Cs.** 7,734 kWh is the firmus energy average annual consumption for customers with a Pay As You Go meter in the Greater Belfast area.
TrustScore 4.9/5. Showing 5-star reviews. These testimonials represent each customer’s own experience regarding firmus energy and may not be representative of all firmus energy customers.
†Savings tips sourced from: