The proposal is the first plank of his party's platform for the upcoming May 14 provincial election.
The tax credit would be for people paying more than $780 per year on tolls and ferry fares. It would cover 40 per cent of the cost to a maximum credit of $408.
"What we're trying to do is to address that hit that these average families are taking and give a little bit of that back. We think the hit is simply too big it's unfair these folks are the only ones paying the toll," said Cummins.
Cummins says the tax credit would cost the province $45 million in lost revenue each year.
Currently there are two tolled bridges in Metro Vancouver: the Port Mann Bridge and the Golden Ears Bridge.