International Travel

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International travel statistics produced by Stats NZ measure the number and characteristics of international arrivals into New Zealand, and the number of international departures from New Zealand.

International travel counts the number of short term overseas visitor and New Zealand-resident arrivals and departures. This is obtained from electronic passport and flight records, along with details from arrival cards for every passenger, supplied to Stats NZ by the New Zealand Customs. These electronic records include flight and passport details, such as date of travel, date of birth, sex, and country of citizenship.


The purpose of international travel statistics is to count passengers arriving into and departing New Zealand short-term. Passengers are split into one of three passenger types: overseas visitors, New Zealand-resident travellers, and migrants. Short-term travellers are overseas visitors visiting New Zealand for less than 12 months; or people who live in New Zealand and are travelling overseas for less than 12 months or arriving back after an absence of less than 12 months.

As the principal agency responsible for processing and publishing international travel statistics in New Zealand, Stats NZ seeks to provide information that meets the contractual, public policy, and community requirements for up-to-date official statistics at the local, regional, and national level.

Arrivals and departures of overseas visitors and New Zealand-resident travellers are key indicators of tourism and travel.

Citation Information


International Travel

Alternate Title

External Migration, Migration, Tourism, Travel


Stats NZ


Stats NZ

Coverage Information

Temporal Coverage

  • 1860 to present

Topical Coverage

  • International Migration
  • International Travel
  • Migrants
  • Visitors
  • Travel
  • Arrivals
  • Departures
  • Tourism
  • Migration

Information pages



Significant events impacting this study series

1860 – first reliable coverage of New Zealand's international arrivals and departures. Earlier data did not cover all of New Zealand's provinces.

April 1921 – arrival and departure cards are introduced. Passengers are split into three passenger types - overseas visitors, New Zealand-resident travellers, and permanent and long-term migrants.

1942–1945 – limited detailed data during WWII.

April 1975 – sampling of arrival and departure records begins. Some detail is only captured from a sample of arrival and departure cards, and statistics are produced by multiplying the results by the sample ratio.

April 1978 – detailed international travel and migration statistics for this month onwards are available in electronic format. Most earlier detail is only available in hard-copy reports.

July 1979 – sampling of permanent and long-term migrants ends, with detailed data now collected for every migrant.

September 1997 – the New Zealand Customs Service begins supplying Statistics New Zealand with passport and flight data electronically for all arrivals and departures. Statistics New Zealand holds a record for each passenger movement from this date. Some detail continues to be collected from arrival and departure cards for only a sample of passengers.

June 2004 – Statistics New Zealand begins using scanning and image-recognition technology to automatically capture most of the required information from arrival and departure cards.

July 2008 – the name "International Travel and Migration" is adopted, replacing "External Migration", which had been used since 1921. The new name better reflects that the statistics include short-term travellers as well as permanent and long-term migrants.

July 2013 – New simplified departure card is released. Some changes to arrival and departure information as a result.

August 2016 – New processing system is introduced (See 'Data Collection' 'International travel and migration processing system changes in August 2016' for more information).

May 2017 - Report describing the 12/16-month rule for classifying migrant status.

November 2018 - Removal of departure card from the New Zealand border and is replaced by smarter electronic systems.

January 2019 - International migration uses the outcomes-based measure. This is a new official measure estimated from the actual travel histories of people travelling in and out of New Zealand. It provides a more accurate measure of migration – a traveller is classified as a migrant based on their actual movements. This new measure replaces the previous migration measure (permanent and long-term (PLT) migration) which was estimated from travellers’ statements on arrival or departure cards – based on how long they intended to stay in New Zealand (or be away).

January 2019 - First release of the international migration data using the outcomes-based measure..

January 2019 - Separate International migration and International travel releases. Before January 2019, International migration and travel were published combined as one release.

March 2020 - New data on migrant departures to Australia. This is the first time Stats NZ has published figures showing migrant departures to Australia, since the end of traveller departure cards in November 2018.

March 2020 - Temporary release of regular border-crossing flow data to facilitate analysis of the COVID-19 international pandemic and impact on inbound and outbound tourism sectors.

Usage and limitations of the data

International travel

International travel is based on passport and flight details, and responses given on arrival cards. Responses to some questions are the passenger's intentions, which may change. Published figures are not revised to account for changes in intention.

International Migration

The outcomes-based measure of migration with provisional and final estimates is now the official way we measure migration in New Zealand. The results build on the outcomes-based measure of migration that was released from May 2017 and enabled the removal of the departure card.

The new approach uses passport data to link arrivals and departures and accurately measure how long people spend in, or out of, New Zealand after their initial border crossing. To classify a border crossing as a migrant movement, we need to observe up to 16 months of travel history.

From November 2018, departure card was removed. This affected a number of variables (see Variables Table above)

With this new approach it takes 17 months before final migration estimates are available. To produce timely results, we use a statistical model to produce provisional migration estimates. Statistics produced using these provisional estimates have uncertainty for 16 months; after this time we can finalise the classification of all border crossings (according to the 12/16-month rule).

As new data becomes available, the provisional migration model has more information about the border crossings it is trying to estimate. So, with an extra month of data available, this causes shifts in the estimated number of migrant arrivals and migrant departures, and thus changes in the net migration estimates.

For example, the extra data will indicate travellers who have now departed New Zealand, or travellers who were away that have since returned to New Zealand.

Compared with total border crossings, the number of migrants is very small. Of every 50 people crossing our border, typically 49 are short-term movements and only 1 is a migrant arriving or departing.

The migration estimates become more certain after each subsequent month. For a typical month, 1 in 4 arrivals are classified with certainty for the first estimate after six weeks (after the end of the reference month). This increases to 9 in 10 after four months. The monthly revisions can therefore be expected to become relatively small after about five months, as we can calculate the duration of stay/absence more definitively.

Of the 14 million border crossings in the December 2018 year, 81 percent of border crossings were classified with certainty at the time of the first estimate in mid-February 2019. The remaining 19 percent represent 2.6 million border crossings, so a small change in classification can affect the migration estimates.

Customers therefore have a choice of using the most timely migration estimates which have more uncertainty, or waiting a few months until the migration estimates become more certain.

Outcomes-based and intentions-based measures compared

The previous migration measure (permanent and long-term (PLT) migration) was estimated from travellers’ statements on arrival or departure cards – based on how long they intended to stay in New Zealand (or be away). This intentions-based measure was timely; however, traveller behaviour was not always consistent with the stated intentions at their border crossing. This may be due to: circumstances changing, misunderstanding the questions on the traveller cards and incorrectly reporting their intentions, or deciding to extend their visa or stay/absence.

The outcomes-based measure is estimated from the actual travel histories of people travelling in and out of New Zealand. This provides a more accurate measure of migration – a traveller is classified as a migrant based on their actual movements.

The outcomes arrival and departure estimates are consistently higher than intentions PLT estimates.

The outcomes net migration estimates are sometimes higher, and sometimes lower, than intentions PLT estimates. In recent years, net migration using outcomes was lower than intentions.

Main users of the data

International travel statistics are of interest to tourism-related businesses, travel agents, and regional and national tourism organisations.

Statistics on all arriving and departing passengers are of interest to airlines, airports, and airport businesses (such as duty free stores).

International travel and migration statistics are also used as inputs into a number of other statistics, such as the International Visitor Survey, New Zealand's population estimates, balance of payments, and gross domestic product.


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