The number of errors made by the Ministry of Education's Novopay system has leapt from 490 to 3227 in two weeks.
During question time a fortnight ago, Associate Minister of Education Craig Foss said 100 teachers were either not paid or underpaid during the last pay cycle and 390 teachers were overpaid.
Today in question time that figure was raised to 3227.
The figure includes a backlog of mistakes with the first two pay cycles including salary assessments for people joining payroll, changes of address or bank account, and extra allowances for bus controllers, management units, maternity leave and after-school coaching.
Mr Foss said all errors would be resolved by the end of the week.