Premier Gladys Berejiklian has refused to be drawn on the threat of minority government, as independent crossbenchers say the overall two-party vote will be a key factor in deciding which party to support in a hung parliament.

As the election campaign began in earnest on Monday, Ms Berejiklian said she would not “deal with hypotheticals”, saying only that voters had a “very clear choice”.

Premier Gladys Berejiklian has refused to been drawn on the threat of minority government. Credit:Louise Kennerley

“Let’s wait until polling day because I don’t like to speculate about the result. We’ve always known it was going to be tight,” Ms Berejiklian said.

“They [voters] have a choice about a positive future based on jobs, infrastructure services, [and] taking the pressure off families. Or NSW can go backwards under Labor because we’ve seen what they’re like in government.”