Motorists are being urged to book their NCT early, as demand pushes wait times into next year.
An Irish Independent survey found the earliest some people can book an appointment is January 2023.
Figures revealed Dublin, Cavan, Kildare and Louth were among some of the longest wait times in the country.
The paper reports:
"Of the 48 test centres in Ireland, eight only have appointments available next January. These include Dundalk, Cavan, Naas, Navan and Deansgrange, Northpoint and Fonthill in Dublin."
Centres in Kells Co. Meath, Athlone Co. Westmeath and Longford town don't have dates until early December.
While Letterkenny and Galway have some of the soonest appoinments available, at the beginning of August.
Waterford was found to have the shortest waiting list, with appointments available almost immediately.
