From July 2024 to July 2026, paid parental leave will gradually increase to a total of six months.
Currently, parents are eligible for 18 weeks of paid parental leave and two weeks of secondary carer leave.
Prime Minister Anthony Albanese is expected to officially announce the new policy at the NSW State Labor conference tomorrow.
"This was one of the strongest points of consensus and one of the clearest calls for action from our Jobs and Skills Summit," Mr Albanese said.
"Businesses, unions, experts and economists all understand that providing more choice, more support and more flexibility for families and more opportunity for women boosts part."