Firmus customers in the Ten Towns area are to see their gas prices rise for the second time in 2022.
The Consumer Council says the 16.31% from May 3 will impact 59,000 households.
They say the further hike will see the yearly gas bill of a typical household with a credit meter rise by about £211 per year to £1,504. Those customers with a prepayment gas meter (PAYG) will see costs increase by around £201 per year to £1,432.