Labour Leader David Cunliffe restated his party's commitment to "universal" or compulsory KiwiSaver.
He also confirmed this morning that a Labour Government would lift minimum contributions to the savings scheme by a quarter of a percentage point each year from 3 to 4.5 per cent by 2021 for both employers and employees.
Under Labour's policy, all employees not already in the scheme would be automatically enrolled on October 1 next year. Students and beneficiaries would be exempt.
Low income earners would also be exempt - but the details of the minimum threshold will be subject to consultation, Mr Cunliffe said.
Labour expects auto-enrolment would bring a further half a million people into the scheme.