Chicago has become the largest city to date to jack up the minimum wage, a move that comes even as efforts to raise the rate across Illinois have bogged down.

Workers in the Windy City will earn at least $13 an hour starting in 2019 after Mayor Rahm Emanuel won approval for the boost on Dec. 2 from the Chicago City Council.

The city’s rate will increase gradually, rising from $8.25 to $10 next year, stepping up incrementally until it reaches $13.

The vote came despite impassioned pleas by restaurant and retail groups for a lower increase of $10.10 an hour. Alderman Matthew O’Shea warned his Chicago district could see businesses move across the city line to the suburbs.

“Make no mistake, this will cost thousands of low wage jobs throughout Illinois as businesses flee,” the Chicagoland Chamber of Commerce and statewide hotel and restaurant groups said in a statement.

“Further, it puts at severe risk the small businesses in border communities throughout Chicago that neighbor the suburbs and Indiana,” the coalition of business groups warned.

But while Chicago plunged ahead, franchisees in the rest of Illinois got a reprieve, after state lawmakers adjourned for the year without taking any action on the issue.

The stall out came after Illinois voters approved an advisory question on the fall ballot recommending an increase in the minimum to $10.10 an hour.

The failure on the part of the House to take a vote was a parting blow to Governor Pat Quinn, a Democrat who made passing a minimum wage increase a major focus of his last few months in office.

By contrast, the Senate went ahead and passed an increase to $11 an hour, but the proposal was moot with the decision by House Speaker Michael Madigan to officially adjourn the chamber for the year just a few hours earlier.

The legislative inaction will now likely thrust the minimum wage question into the hands of Illinois’ incoming Republican governor, Bruce Rauner.

Barring a decision by Quinn to call a special session in January to deal with the wage issue, the bill will have to be refiled in the next legislative session.

Rauner did not make a major stand on the wage issue one way or another during the gubernatorial campaign, though he is not seen as opposed to the increase.

Rather, he is likely to couple any wage increase with pro-business reforms, observers say.

The Windy City’s wage ruling is expected to cause significant confusion in the marketplace where a patchwork of competing wage standards will co-exist along the city’s borders.

“Neighborhoods that border suburban municipalities will be placed at a distinct disadvantage now that businesses will be required to pay a higher wage than those just across the street,” the Chicagoland Chamber Commerce stated.