School principals say the Novopay debacle is actually getting worse rather than making improvements.
The latest survey of more than 900 schools found staffing, usage and expenditure (SUE) reports were correct for just 16 percent of schools, down from 36 percent a month ago, New Zealand Principals' Federation president Paul Drummond said.
It also found 83.9 percent of schools reported at least one staff member got the wrong pay, up from 59.6 percent in November, while unresolved pay problems from previous pay rounds went up from 83.3 percent to 84.5 percent.
In addition, the survey found 90.1 percent of principals reporting their SUE reports for holiday pay were incorrect.
"By this stage we would expect to be seeing substantial improvements in the performance of Novopay, but instead, every pay cycle throws up new problems and unresolved issues remain unresolved," Mr Drummond said.
He said 97 percent of principals now had no confidence Novopay would deliver an efficient or supported pay roll system by the end of next year.
"The system is fundamentally flawed," Mr Drummond said.
"It's time to go back to the future, reinstate designated pay roll support staff for each school, while expert technicians are brought in to work on what is a 'derailed system'."
Labour acting education spokesman Chris Hipkins said Education Minister Hekia Parata and Associate Education Minister Craig Foss should forget about holidays until they have fixed the system.
"This has been going on now since August. It beggars belief. Hekia Parata and Craig Foss should have rolled their sleeves up months ago and sorted this mess out.
"Instead we are a week out from Christmas, with school staff still living with the uncertainty of a botched payroll system. Our teachers deserve a decent holiday, but perhaps Ministers Foss and Parata should stay at work until Novopay starts delivering."