Cost on families from feds' carbon tax plan will be known in September: Morneau

The Opposition Conservatives are pressuring the Trudeau government to divulge how much the federal carbon tax will cost Canadian households, but Finance Minister Bill Morneau says they'll have to wait until September to find out.

The Liberals' controversial carbon pricing policy has been under regular attack by the Tories, who are hoping it will become a key campaign issue ahead of next year's federal election.

During a parliamentary committee hearing Thursday, Morneau was repeatedly pressed by Conservative MP Pierre Poilievre to disclose how much the carbon tax would cost Canadian families.

In response, Morneau said the plan will be revenue neutral overall and that there will be no net increase in taxes.

However, he added that details on how much people will pay will only be determined in September after each province reveals their individual approaches to applying the policy.

Poilievre then suggested Morneau was asking MPs to pass budget legislation that would allow the government to impose the carbon tax before explaining how much it would cost their constituents.