Most guides stop at "three months per visit". That is correct, but it is not the limit that catches people out. Immigration New Zealand also caps the total: you may only visit New Zealand for up to 6 months in any 12-month period.
Why both numbers exist
The per-visit limit controls how long one entry can last: 3 months for most passports, 6 months on a UK passport. The 6-months-in-12 rule controls how much of the year you may spend in the country in total. You have to satisfy both.
What this means in practice
- Two separate three-month visits in one year put you at the 6-month ceiling
- A UK passport holder reaches the ceiling in a single six-month visit
- The period is rolling, not a calendar year — it is measured backwards from the day you want to arrive
If you have already used your six months
Immigration New Zealand is explicit about this: if you have already spent six months in New Zealand in a 12-month period, you must apply for a visitor visa before you travel. Arriving on an NZeTA instead is not an option, and the decision is made before you board.
Source: Immigration New Zealand — Visa Waiver Visitor Visa
An approved NZeTA does not override this. It authorises you to travel; it does not confirm that you are still within the six-month allowance.
More on the NZeTA
Leaving and returning
A short trip to Australia and back does not give you a fresh three months. What resets, what does not, and why repeated entries attract questions.
Extending your stay
The NZeTA itself cannot be extended. What you can do is apply for a visitor visa from inside New Zealand — and the timing of that application matters.
Passport validity
Your passport must be valid for at least 3 months after you plan to leave New Zealand — not after you arrive. Renewing mid-trip also invalidates your NZeTA.
Traveller Declaration
Everyone arriving in New Zealand must complete a Traveller Declaration, including New Zealand passport holders. It is free and opens 24 hours before you travel.
Biosecurity
Undeclared risk goods mean an instant NZD $400 fine, even by honest mistake. Deliberate smuggling: up to NZD $100,000 and 5 years in prison.
Customs allowances
Goods over NZD $700, more than 50 cigarettes, and cash of NZD $10,000 or more all have to be declared on arrival.