At the time she said officials were still looking into it but some earlier risk assessments were the reason members of this group weren't allowed to return sooner.
Unvaccinated residence visa holders have been unable to enter New Zealand since November last year.
Hipkins said changes announced today were due to high numbers of vaccinated Kiwis, combined with the Omicron variant's prevalence.
He said these factors reduced the risks to domestic healthcare systems.
"I acknowledge the difficulties some residents have faced in remaining overseas during this period and I am pleased we are able to make this change," Hipkins said.
The changes allow unvaccinated travellers holding a permanent resident visa or a resident visa, and Australian citizens usually living in New Zealand, to re-enter.
National's Covid-19 Response spokesman Chris Bishop said it was sad how many permanent residents had been barred from travelling home in recent months.
He welcomed today's rule changes but added: "Frankly, it's taken too long."