The report showed 7 per cent, 80,000 Kiwi children, were said to be in severe poverty, facing material hardship and living in a low-income household - but this was 10,000 less (down 1 per cent) on the previous year.
Meanwhile 290,000 children were living in homes where money was tight, down 5000 (1 per cent) on the previous year.
Prime Minister Jacinda Ardern had pledged in the election campaign to end child poverty and took on the role of Minister for Child Poverty Reduction once in government.
Ardern welcomed the improved numbers but said there were still thousands of children going without and she was prepared to be held to account for improving their lot.
"The Families Package, and my Child Poverty Reduction Bill, will have a significant impact on families who are struggling to pay for the basics for their children and will ensure the public can track our progress," she said.
Ardern said details of the package, aimed at those most in need of support, would be announced next week.
It is early days, Becroft said, but hoped to see draft legislation as part of the new Government's 100-day package.
Becroft said he has also discussed a universal basic income with the Government, as well as giving money collected in child support directly to the parent looking after the children.
Asked about the Government's commitment to seriously addressing child poverty, Becroft said: "What we have seen on the whiteboard looks encouraging, but this government, like any government has to walk the talk. And that is what we are waiting to see."