Diana Whalen said Tuesday that the province can't afford to lose about $190 million in revenue for each percentage point cut in the HST.
"Given the figures that we have been presented with it will become clear that it is not the right thing to do at this time," Whalen said in an interview. "We will not be cutting off any source of revenue because we cannot afford to do so."
The former NDP government brought in legislation to cut the HST by two percentage points over two years, beginning next year, which would bring the tax down to 13 per cent.
While Whalen wouldn't give specifics about the figures to be presented in a fiscal update she is scheduled to release Thursday, Whalen said projections by the previous NDP government are significantly off the mark.
Whalen said the province's overall fiscal situation is worse since the NDP announced in August that the province was running a slender surplus of $18.3 million.
She said revenues have fallen to lower levels than were projected in the previous update, which she said was "overly optimistic."
"I think this update will show that even revenue sources that we were counting on were depressed in the last six to eight months," Whalen said.
The NDP said its acting leader, Maureen MacDonald, was unavailable for comment. MacDonald was the party's finance minister before the NDP was defeated in October's election.
Whalen said the province's latest financial numbers also throw into doubt when the books can be balanced, although the government is promising to eliminate the deficit before the end of its mandate. She said balancing the books will largely be tied to ongoing signs of an economic recovery in the United States, the main customer for Nova Scotia exports.
Based on what she heard from the other provinces at meetings this week of the country's finance ministers, Whalen said Nova Scotia is likely looking at balancing its books on the same timeline that her counterparts outlined — within two to three years.
"I'm taking a bit of a lead by what's happening in the other provinces because they are very much in the same situation with their economies," she added.
Whalen said the NDP was "ideologically tied" to a balanced budget because the party promised to eliminate the deficit in the 2009 election campaign.
"I think they had so much at stake that they really bent and twisted the budget ... to create the illusion of a balanced budget," she said.
Whalen said the government will continue to control spending while any discussions about potential program cuts would have to wait until budget consultations begin in January.
Note to readers: This is a corrected story. A previous version said the NDP forecast a surplus of $16.4 million in August.