May
| Date | Category | Description |
| 05 May | PAYE |
- Employer monthly schedule (IR 348) due for large employers
- Employer deductions (IR 345) or (IR 346) form and payment due for large employers for the period 16 April to 30 April
|
| 07 May | Provisional Tax |
- 1st Instalment (November balance date)
- 2nd Instalment (July balance date)
- 3rd Instalment (March balance date)
|
| 07 May | Provisional Tax |
- 1st Instalment (September balance date)
- 2nd Instalment (March balance date)
|
| 20 May | PAYE |
- Employer monthly schedule (IR 348) due for small employers
- Employer deductions (IR 345) form and payment due for small employers for the period 1 April to 30 April
- Employer deductions (IR 345) form and payment due for large employers for the period 1 May to 15 May
|
| 20 May | RWT |
- RWT Return and payment due for deductions from dividends and deductions of 0 or more from interest paid during April
|
| 28 May | GST |
- Return and payment due for the period ended 30 April
|
| 28 May | Provisional Tax |
- 1st Instalment (December balance date)
- 2nd Instalment (August balance date)
- 3rd Instalment (April balance date)
|
| 28 May | Provisional Tax |
- 1st Instalment (October balance date)
- 2nd Instalment (April balance date)
|
| 31 May | RWT |
- Annual reconciliation statements (IR15S, interest and IR17S or 17SA) due for the year ended 31 March
|