I'm not sure it's a muck-up, but maybe i'm wrong.
IRD website states "...people will see the extra pay in their payslips from 31 July." - your employees won't.
https://www.ird.govt.nz/pages/campaigns/personal-income-tax-threshold-changes
Which PAYE tax tables
Use the PAYE tax tables that apply on the day the PAYE income payment is made to your employees.
PAYE tables to use according to pay
Pay period ends | Employees paid on | PAYE tables to use |
31 July 2024 | 30 July 2024 | 1 April 2024 to 31 July 2024 |
31 July 2024 | 31 July 2024 | 31 July 2024 onwards |
1 August 2024 | 1 August 2024 | 31 July 2024 onwards |
EDIT: I tired posting this info yesterday, but MYOB capped my allowable number of posts on this thread??