"It (borrowing money) is not something that we talked about during the campaign because that wasn't the fiscal reality during the campaign," Redford told reporters.
But she pointed to Tuesday's announcement by federal Finance Minister Jim Flaherty that a weak global economy means the federal deficit will hit $26 billion this year, $5 billion more than predicted.
"The economic downturn has gone in a way that no one expected it to, the federal government has said that," said Redford.
"What we will do is manage our government and manage our budget in tune with the times.
"We always said we would build infrastructure for the future."
Her comments follow a weekend announcement by Finance Minister Doug Horner that the province will now begin taking out loans to pay for infrastructure while keeping the $40-billion day-to-day operating budget balanced.
Earlier Thursday, in a speech to rural and county politicians, Redford expounded on that theme.
"We will ensure that we put in place the right progress that we need to make on infrastructure so that the schools, the hospitals, clinics, water systems and roads are in place in your communities.
"There are lots of different ways to talk about deficit, but the one thing we can't have is an infrastructure deficit."
She said the time is right.
"Our Triple-A credit rating allows us low borrowing costs, and if we pay for capital over time, just like we do in our lives, and not put off projects, we will pay less in the long run — socially and financially."
Opposition Wildrose leader Danielle Smith accused Redford of manipulating Albertans in a cynical political shell game by delivering a set of rosy oil price and corporate growth projections in February's pre-election budget knowing they wouldn't be met.
The budget predicted an $886-million deficit but a return to surplus budgets in 2013-14.
But after the election, in August, Horner announced a revised budget deficit forecast to be as high as $3 billion.
"This is fairly typical of a premier who talks out of both sides of her mouth," said Smith.
"They didn't want to go to the public and face the electorate saying, 'Hey vote for us and we'll go back into debt again.'
"So now they feel safely into another majority mandate, they don't really care what their promises are. This is sort of a pattern for this premier. She'll say anything to get elected."STORY CONTINUES AFTER GALLERY..
However Redford told reporters Thursday the bad first-quarter was one of the reasons for the policy shift.
"I think that you've clearly seen through our first-quarter update and what's going on in the world that the world has changed," said Redford.
Smith said regardless of the rhetoric, a province of under four million people with resource revenues at $10 billion a year should not be going hat in hand to the capital markets.
"The world has not changed so much (in the past six months) that we need to go into debt. We have a government that needs to get its spending under control," said Smith.
Debt freedom has been a point of pride for the Tories since they retired the $23-billion debt under former premier Ralph Klein.
The issue has become the clear ideological dividing line between the Tories and the Wildrose, both of which are right-centre parties.
The verbal sparring has been bitter.
Tory cabinet minister Doug Griffiths labelled the 17 Wildrose MLAs "hypocrites" on Tuesday for pushing lower spending overall but higher spending on pet projects in their constituencies.
Without calling out the Wildrose by name, Redford made the same point in her speech.
"It's pretty easy to travel around the province and say, 'You know, when that budget is balanced, we'll invest in infrastructure,' and (say) 'You know what, we need a school here,' when you're in one part of the province and then you go to another part of the province and say something different," said Redford.
"Responsible provincial governments don't have the luxury of being able to do that."
Smith said her party does have a plan, one that doesn't involve taking on debt.
She said the Wildrose would install a $4-billion base of funding every year for infrastructure, which is comparable on a per capita basis to big provinces like Ontario and B.C.
Hikes to that $4 billion would be tied to inflation, she said.
Add to that she said, there would be increased funding for municipalities for infrastructure needs equal to 10 per cent of overall provincial revenues, starting at $1.6 billion this year.
"Over a 10-year period, our balanced budget plan calls for $75 billion in infrastructure spending," said Smith.
"So for a premier to say that somehow $75 billion in new infrastructure funding on a pay-as-you-go basis is not going to be enough to meet the needs of our growing economy, I have to scratch my head and say 'What would be enough?'"
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