Rents increased by roughly 8% nationally in the third quarter of this year.
It's the highest growth rate in almost four years.
According to new figures from the Residential Tenancies Board, the average rent is now €1,397 - up €44 on Q2 of this year.
It represents a 8.3% increase year-on-year, growth that hasn't been seen since the last quarter of 2017.
Dublin remains the county with the highest average rent, €1,916, while Leitrim has the lowest at €731.
12 counties now have average rents of more than €1,000 per month.
They include Carlow, Louth, Kilkenny and Waterford.
The RTB says there was also a 31% fall in the number of tenancies registered nationally in Q3 this year, when compared to same period in 2019.
It says the pattern is unusual given the period coincides with the start of the academic year.