March 2023
6 March
- Provisional tax instalments due for people and organisations who use the ratio method
20 March
- Employer deduction payment due date for employers who deduct less than $500,000 PAYE and ESCT per year.
- Employer deduction payment due date for employers who deduct $500,000 PAYE and ESCT or more per year. Payment due for deductions made between the 16th and the end of the previous month.
28 March
- GST return and payment due
31 March
- 2022 income tax return due for clients of tax agents (with a valid extension of time)