"The decline has challenged providers' ability to maintain the quality of what they deliver to students, made worse by tuition subsidies generally decreasing in real terms since 2011 as increases were targeted by the previous government at particular fields and levels of study."
The increase in tuition subsidies would ease some of the pressures faced by the sector but Hipkins said he was also reviewing the vocational and training education system and institutes of technology and polytechnics, including funding systems.
He would also soon begin consultation on the maximum amount tertiary education providers would be able to increase fees by in 2019.
Hipkins said the initial data on fees-free indicated that more than 33,000 students and trainees were receiving fees-free tertiary education up to April 2018.
In the January to March 2018 quarter, 25,400 fewer students were borrowing to pay fees than in the same quarter in 2017.
Borrowing was $151 million lower in the first three months of 2018 than during the same period in 2017.
"That's a great start to our commitment to reduce financial barriers to New Zealanders participating in post-school education and training," Hipkins said.
Enrolments across tertiary providers for the majority of level 3 and above courses for the first four months of 2018 were about the same as the previous year, after a drop of about 5000 in the year to the end of 2017."
"Signs the policy may have contributed to stabilising the past significant decline in enrolments is also pleasing," Hipkins said.
Number of fees-free eligible enrolments reported as at April 2018
Universities: 21,100
Polytechnics: 7500
Wānanga: 100
Private Training Establishments: 3600
Industry Training Organisations: 1200
Total 33,500