Almost a thousand people made an official complaint about a taxi in 2016 - up 7.5% on the previous year.
New stats from the National Transport Authority show most complaints last year related to driver behaviour at 444, with 348 linked to fares and 172 concerning hiring a taxi.
Complaints of overcharging and aggressive language were also recorded against drivers, while some were accused of refusing to take guide dogs.
A smelly cabbie in need of a shower and another allergic to dogs were also among the gripes.
The amount taxi drivers paid out in fine or Fixed Charge Penalty Notices, as a result of breaches rose by 38% from over €40,000 to €56,000.