The economy of New Zealand is a highly developed free-market economy. It is the 52nd-largest national economy in the world when measured by nominal gross domestic product (GDP) and the 62nd-largest in the world when measured by purchasing power parity (PPP). New Zealand has one of the most globalised economies and depends greatly on international trade, mainly with China, Australia, the European Union, the United States, and Japan. New Zealand's 1983 Closer Economic Relations agreement with Australia means that the economy aligns closely with that of Australia.

Australia is a highly developed country with a mixed economy. As of 2023, Australia was the 14th-largest national economy by nominal GDP, the 19th-largest by PPP-adjusted GDP, and was the 21st-largest goods exporter and 24th-largest goods importer. Australia took the record for the longest run of uninterrupted GDP growth in the developed world with the March 2017 financial quarter. It was the 103rd quarter and the 26th year since the country had a technical recession. As of June 2021, the country's GDP was estimated at $1.98 trillion.