SSE Airtricity has announced it is hiking electricity prices by 7.5% this year.
Northern Ireland’s second largest energy supplier will up household electricity prices from October 1.
The firm says it is “a result of rises in external costs, including wholesale energy costs which are affected by global energy markets”.
“The price change means a typical household customer will see electricity costs rise by around £2.75 per month or around nine pence per day," it says.
It comes after Power NI revealed it will increase its prices by 5.6% this winter.
David Manning, director of home energy at, SSE Airtricity, said:
“Having consistently delivered price decreases to our customers in recent years today’s decision is not taken lightly and is the result of increasing costs outside of our control.
“Since 2013, we’ve cut electricity prices three times, reducing the average household bill in that period by over £100.
“At all times we are focused on delivering value and service to our customers and despite this price change, the average SSE Airtricity bill remains £68 cheaper than it was in 2013.”
Earlier this month, Power NI revealed its own price hike, affecting more than half-a-million households in Northern Ireland.
Power NI, Northern Ireland's largest energy company, has announced that it is increasing prices by 5.6% with effect from October 1.
Customers will be contacted by post over the next few weeks.
The Consumer Council described the announcement as "unwelcome but justified".