The charity KidsCan faces losing its government funding from next year.
The charity, which has been in operation for 12 years, provides food, clothing and healthcare to 168,000 children across 700 New Zealand schools.
Executive Julie Chapman told Checkpoint with John Campbell she was told last week by Oranga Tamariki / Ministry for Children that it would lose its government funding - $350,000 worth - on 1 July next year.
"There's going to be quite a big impact on our ability to get the support to kids in need.
"If this funding does go ... children are going to go hungry, they're going to have to wait longer without clothing, without shoes, all those things that they're in urgent need of."
Ms Chapman said for every dollar it spent, at least 80 cents went to children.
"We are feeding 30,000 children a week across New Zealand, we're providing around 25 to 30,000 pairs of shoes, 50,000 pairs of socks, 40,000 raincoats a year," Ms Chapman said.
"And we're providing feminine products and basic health and hygiene items that children are missing out on."
Oranga Tamariki said in a statement funding for KidsCan has been time limited and at the moment will end on 30 June 2018.
"No final decisions have been made yet about future funding," it said.