The Office of the Director of Consumer Affairs has released details of instances where publicans increased drink prices during big sporting events.
The Director of Consumer Affairs, Carmel Foley, has warned publicans that she will prosecute them for failing to display price lists.
A survey by the ODCA found that a pub near Croke Park raised the price of a pint of lager by 20c on the day of a Leinster senior football semi-final in June.
Ms Foley's warning comes after seven of the 11 pubs surveyed in the Croke Park area failed to meet regulations on displaying price lists.
In a separate survey during the Galway Races festival week, two pubs were found to have raised their prices.
They were O'Flaherty's pub in the Great Southern Hotel, which raised the price of stout, lager, beer and cider by 10c above the displayed prices, and the Skeff Bar, also on Eyre Square, which raised the price of its pints by 10c.
A survey of 16 pubs in Tralee during the Rose of Tralee festival found no increases on the displayed prices.
In the Baggot Street and Lansdowne Road area on Saturday 27 March, when Ireland played Scotland, six out of ten premises had increased their prices substantially.
The largest increase was €1 for a pint of stout in Maguire's on Lower Baggot Street.
