The Tories at Queen's Park say they have their hands on some cabinet documents which show the Liberal government used "fake'' numbers regarding the size of the province's deficit.
Progressive Conservative finance critic Vic Fedeli pointed to the leaked papers, which outline the Liberals started off with a worst-case scenario deficit number of $24.7 billion from 2009-10.
Fedeli says the Liberals then graphed it out, drawing a diagonal straight line to zero and filling in the blanks each year with no plan.
He calls it an "aspirational" process to get to balance.
The finance minister has already announced the province won't meet interim deficit targets but maintains the budget will be balanced by 2017-18.