There is no single rule saying you may spend exactly a fixed number of days overseas every year. The standard citizenship-by-grant presence test works in two layers: you need at least 240 eligible presence days in each of five 12-month periods and at least 1,350 eligible presence days across the full five-year window.
The rough four-month idea is only a shortcut
Govt.nz explains that being outside New Zealand for more than about four months in any one of the relevant 12-month periods can cause the annual test to fail. But the legal test is the day count, not the phrase “four months”. Months have different lengths, leap years exist, and several short trips can add up.
The five-year total matters too
Even if every 12-month period reaches 240 days, the five-year total still has to reach 1,350 eligible days. This is why looking only at one year's travel can be misleading.
Trips near the edge of a 12-month period can have an unusual effect
The five periods are anchored to the proposed application date and move with it. A trip can therefore affect one period at one proposed application date and a different period after the window shifts.
Use the travel simulator before booking
The Travel Impact Simulator can compare a past, ongoing or future trip against your conservative presence estimate. Historical trips use an earliest-date comparison, while ongoing and future trips use a current-or-next planning baseline. DIA's official records remain authoritative.
Use the free tools
Turn the guidance into a practical next step
Check your presence estimate, test a future trip, or work through the application checklist.