Opposition Leader Bill Shorten has accused Tony Abbott of trying to blackmail Liberal state premiers to increase GST revenue.
A meeting of state and territory leaders on Friday should have removed the GST from women's sanitary products, including tampons, Mr Shorten said.
But instead the prime minister wants an increase in GST and wants the call for change to be state-driven, he said.
"We know that what Mr Abbott is trying to do is blackmail (Tasmanian premier) Will Hodgman and everyone else to support a 50 per cent increase on the cost of living - in terms of what you buy in the shops and (by) extending the GST to fresh food and school fees," Mr Shorten told reporters in Hobart on Saturday.
He said Mr Abbott would add a whole lot of other costs by placing GST on goods which currently don't have the tax.
"Mr Abbott is doing it because he is too weak to actually say to Australians he wants to increase the GST," the Labor leader said.
Mr Shorten said Labor treasurers including those from Victoria and Queensland had argued against the discriminatory taxing of women's sanitary products but the government won the debate.
The meeting also decided that goods bought online from overseas will attract the 10 per cent GST from July 1, 2017.
"Mr Abbott and Mr Hockey and his Liberal team, all they have done since they've come into power is increase taxes," Mr Shorten said.
"You would have thought that if you are going to make some changes to the GST for online shopping they could have at least done something to remove the discrimination against women's sanitary products including tampons."
Mr Shorten said Labor will take a position against an increased GST to the 2016 election.
