WINNIPEG -- Manitoba Premier Greg Selinger is considering a surtax on high-income earners and feels he is no longer bound by a provincial law that would require a referendum on major tax changes.

Selinger says no final decision has been made, but he has been "looking at" high-income tax rates that have been implemented in Alberta, Ontario and federally under Prime Minister Justin Trudeau.

"I note many jurisdictions have implemented a surtax already across the country -- both east and west of us," Selinger said in a year-end interview with The Canadian Press.

"There's different options that have been started to be proposed. We're working our way through this consideration right now."

Alberta's NDP government has replaced the province's flat 10 per cent income tax rate with a series of higher income tax brackets for people earning more than $125,000 annually. As of next year, the top bracket -- for those earning more than $300,000 -- will reach 15 per cent.

Manitoba's current top tax rate is 17 per cent and kicks in at $67,000.

Selinger said it is too early to discuss details, such as at what level a surtax might apply and the rate. He also suggested that if a surtax is implemented, it would be at least partially offset by cuts to middle and lower income taxes.

"We're always interested in making life more affordable for middle-class and working families in Manitoba. That's important."

Selinger ran into public anger in 2013 when he raised the provincial sales tax to eight per cent from seven. He suspended a section of the province's balanced budget law that required a referendum on any increase to sales, income or corporate payroll taxes.

The Opposition Progressive Conservatives took the issue to court and argued Selinger was not allowed to sidestep the referendum. A Court of Queen's Bench judge rejected the Tory argument. The judge said it is unconstitutional to force a referendum on tax changes because it infringes on the powers of the legislature.

With that court ruling, Selinger said he would feel no need to hold a referendum if he implements an income surtax.

"The courts ruled that the way the (balanced-budget) law was written was illegal and unconstitutional ... but we do believe people need to have a chance to have input into things."

Selinger said people would have their say via legislature committee hearings -- Manitoba is one of two provinces in which every legislature bill must undergo public hearings. He also hinted a surtax could be an issue for the provincial election set for April 19.

"We would put that to the people as a proposal. They would have a chance to be aware of that, and they would have a chance to vote on it in an election."