The Novopay system continues to fail hardworking school support staff, teachers and principals, the primary teachers' union says.
The year's second pay cycle this week left 350 principals underpaid a career step allowance and there are reports of multiple other under-payments and errors, says NZEI National Secretary Paul Goulter.
He says the year's first pay cycle earlier this month had a considerably higher error rate than pay cycles last year, which Education Minister Steven Joyce blamed on data entry errors and the complexity of the school payroll.
However, this week's principals' payment error clearly lies with Novopay and its software systems, Mr Goulter says.
He says the school payroll is no more complex this year than last year.
"The fact is that Novopay is not delivering and causing huge stress especially for school support staff who act as payroll officers," he said.
The school workforce has been patient for more than a year, but that patience is fast running out, Mr Goulter said.
A spokeswoman for Mr Joyce has confirmed that as a result of a data entry error, 350 principals are short $70 in this pay period.
This $70 will be made up in their pay in a fortnight's time, the spokeswoman says.
The Ministry of Education has contacted the principals and offered to make manual payments of the $70 if required and so far a small number have taken up the offer, she says.