Business Days in January 2026 for New Zealand

public holidays in January 2026

New Zealand January deadlines

January is the New Zealand summer holiday month and many businesses run a skeleton roster through to mid-January. GST returns for December monthly filers are due January 28 (six-monthly filers run a separate cycle). Provisional tax third instalment under the standard ratio option for March year-end taxpayers is due January 15. PAYE for the final December pay cycle is due January 20. The NZX closes for the first two days of the year (with Mondayisation when those fall on a weekend).

Day-of-Week Distribution

The count of each weekday in January 2026. Useful for shift scheduling, weekly recurring billing, and any rota that depends on a specific day of the week landing in-month.

New Zealand reporting cycles and business-day rules

New Zealand business-day cycles run against IRD PAYE deposit on the 20th of the following month (small employers with PAYE under NZ$50,000 per annum can file quarterly), GST returns on the 28th of the month after the period, and the provisional tax three-instalment cycle (28 August, 15 January, 7 May) for March year-end taxpayers under the standard ratio option. The Reserve Bank of New Zealand operates ESAS as the wholesale RTGS system on bank business days. Mondayisation under the Holidays Act 2003 applies to six specific public holidays. The Contract and Commercial Law Act 2017 sets default payment timing where contracts are silent.

January 2026 working days compared by country

Working-day counts vary across countries because each country observes its own public holidays. The table below puts New Zealand alongside the other ten supported holiday calendars for January 2026.

How January 2026 compares year over year

January 2025 had 21 working days, so January 2026 has 1 fewer working day year over year. On the surrounding months, December 2025 has 21 working days and February 2026 has 19. Looking forward, January 2027 has 19 working days under the same New Zealand public holiday calendar.

Using this calculator in New Zealand

A Wellington corporate treasurer uses the 20-day January 2026 count to align RBNZ ESAS settlement with PAYE 20th-of-month remittance and IRD GST 28th cutoffs. An Auckland recruitment agency uses business-day math to track Employment Relations Act 2000 personal-grievance windows. A Christchurch logistics controller uses working-day counts to align FBT quarterly returns with provisional tax instalments under the Income Tax Act 2007 standard ratio option (28 August, 15 January, 7 May for March year-end taxpayers).