Telecoms company Eircom to increase its prices for residential and business customers.
The higher charges will come into effect in mid April, and are likely to cost an average family an extra €60 a year.
But for some households bills will rise by close to €100 a year for households.
Businesses face an extra €9 a month in costs, or €108 a year.
The company is to hike subscription fees for those with bundled services.
Eircom offers bundles that include landlines, broadband, television and mobile phone services.
Also going up are call set-up fees and per minute call rates for calls outside bundle deals.
Managing director Jon Florsheim said it was the first price rise in four years.