Labour MP Sue Moroney's bid to extend paid parental leave to 26 weeks has passed another hurdle tonight.
However, the legislation will not become law, even with the support to pass its third and final reading.
A spokeswoman for Finance Minister Bill English confirmed he would invoke a financial veto.
Ms Moroney's bid to extend parental leave to 26 weeks passed its second reading 61-60 votes tonight, after support from New Zealand First, the Green Party, the Maori Party and United Future.
The Government last year increased paid parental leave from 14 to 16 weeks. A further lift to 18 weeks kicked-in on April 1.