The Liberals promised to cut rates by an average of 15 per cent from where they were in the summer of 2013 by this August.
Finance Minister Charles Sousa says he hopes that target can still be achieved and he is "committed" to reaching 15 per cent.
Sousa says provisions in a bill that fights fraud and abuse in the auto insurance system have only recently kicked in and will help achieve further rate reductions.
Progressive Conservative critic Vic Fedeli says the 15-per-cent target was originally promised by the previous minority Liberal government to win NDP support for their budget and they never had a plan for how to actually achieve it.
NDP Leader Andrea Horwath says Liberal policies "feather the nests" of the auto insurance industry while leaving drivers to pay among the highest rates in the country.