Firmus energy has announced gas tariffs will rise for thousands of customers next month.
The increase will affect 85,000 customers in the Ten Towns and Greater Belfast area.
The company says the decision was ‘regrettable’ but ‘unavoidable’.
Customers in the Ten Towns network, which includes Londonderry, Coleraine, Ballymena, Newry and Armagh, will see a price rise of 6.8% from 5 April. Meanwhile in the Greater Belfast area, tariffs will increase by 8.8% from 16 April.
The Consumer Council estimate the typical Firmus Energy annual bill in Ten Towns will increase by £39 per year to £619. While customers in Greater Belfast will see a typical bill rise by £45.
Michael Scott, Managing Director of Firmus energy said: “We work hard to keep our tariffs as low as possible, to offer price stability for customers and give them confidence in natural gas.”