A breakdown of Treasury figures published in The Weekend Australia and Fairfax Media shows that after 2024, when the last stage of the plan kicks in and the 37 per cent tax bracket is done away with, relief will almost entirely go to those earning between $120,000 and $200,000.

"It's fair, it's progressive, it maintains the progressive nature of the tax system, but above all, it reaches out to hard working Australians, hard working families on middle incomes," Malcolm Turnbull told the NSW Liberal Party State Council in Sydney.

"We say to them, 'We want you to be able to realise your dreams, and we are doing everything we can to ensure that the tax system gives you every encouragement to have a go, get ahead, and advance your family's dreams'."

The government ramped up its push for income tax reform on Saturday.

Treasurer Scott Morrison said the Treasury figures put a hole in Labor claims that the cuts will favour the rich.

"Labor have no excuse - they know what the cost is for their plan and our plan," Mr Morrison told Fairfax Media on Saturday.

"They need to make a decision about whether they're going to commit to middle income tax relief in this country."

Labor voted with the government to pass its seven-year personal income tax plan through the lower house this week but won't support it in the Senate, where crossbench support for the government is also scattered.

"They will play games in the Senate," Mr Turnbull predicted.

"They think that every dollar earned by Australians belongs to the government."