OTTAWA - Car rental companies Hertz Canada Ltd. and Dollar Thrifty Automotive Group Canada Inc. have agreed to pay a total of $1.25 million in penalties following an investigation into their advertising by the federal Competition Bureau.

The law enforcement agency said Hertz and Dollar Thrifty were advertising prices that were unattainable because of mandatory fees that were systematically added to a customer's bill.

The bureau said the additional fees could increase the final price by as much as 10 to 57 per cent.

The agency also said some of the fees were described in a way that implied that they were mandatory taxes or surcharges imposed by various governments when they were not.

In addition to the monetary penalty, Hertz and Dollar Thrifty have agreed to implement a program to improve their procedures, the bureau said.

However, the settlement did not contain any admission of wrongdoing by the companies.