More than 6000 support staff in schools are being paid less per week because of a once-in-a-decade payroll change.
Some say they are struggling to pay their bills as a result of the change, under which they are earning the same total income but spread over 54 weeks instead of 52 weeks. They say they are going into debt or skipping doctor's visits and other costs.
The Ministry of Education has defended the payroll change, saying no one is being underpaid and that employees were warned in advance.
Denise Murray, an officer manager at May Road School in Mt Roskill, said she was getting $63 less each fortnight.
"This is a lot for me. I'm on my own and I pay $400 a week rent. I can't afford the dentist or ... or payments on my [$2000] car. I've overdrawn my bank twice this year already.