Electric Ireland has said it is reducing costs for 1.2m residential customers.
A reduction of up to 8.5% comes into effect from today.
The savings are being offered to existing account holders who pay their bills by Direct Debit and have online billing.
However, anyone wishing to avail from of the off must contact the company.
General Manager Electric Ireland Paul Stapleton has said it is “great news for Electric Ireland customers”.
“Following our 6% price reduction announcement last month, this is more great news for Electric Ireland customers,” said Stapleton.
“We want our customers to get the best value without having to shop around. Rather than focus on new customers with short term discounts which has been a feature of the market to date, we want to reward our loyal customers and make sure all our customers can benefit from the best long-term value available from the market.”