"We've said in last year's budget that the government will work with stakeholders to promote fair and transparent practices and to help lower credit card acceptance fees for merchants and also to encourage merchants to reduce prices for consumers," Oliver told a news conference.

"We would like to see this proceed on a voluntary basis at this point ... We're looking at months, not years, obviously," he said.

Oliver also said he was encouraged by renewed economic growth in the United States but said this needed to be sustained before Canadian businesses would commit to major capital expenditures, something critical for economic growth.

Asked whether he had met the credit card companies or banks to discuss lowering fees, Oliver replied: "We have had meetings, yes." Pressed as to the timing, he said: "The last little while."

The so-called interchange fee is set by the payment networks and is passed along to card issuers, which include banks.

The Canadian government promised in its budget released earlier this year to take steps to promote lower credit card acceptance costs for merchants.

The government said merchants pay fees ranging from approximately 1.5 percent to 4 percent of the value of credit card payment transactions, costs which are passed on to consumers in the form of higher retail prices. Canada has among the highest credit card acceptance costs in the world, according to the government.

Last year, Canada's Competition Tribunal dismissed a complaint from the Competition Bureau about the rules imposed on merchants by the Canadian arms of MasterCard (>> Mastercard Inc) and Visa (>> Visa Inc).

Major U.S. retailers such as Target (>> Target Corporation) and Amazon (>> Amazon.com, Inc.) have accused Visa and MasterCard of fixing fees charged to merchants when their customers use credit or debit cards.

In July, a U.S. federal judge declined to dismiss antitrust lawsuits filed against Visa and MasterCard by retailers who opted out of a class action settlement in 2012 over transaction fees.

(Additional reporting by Randall Palmer and David Ljunggren in Ottawa; Editing by Tom Brown)

By Leah Schnurr