New Zealand's annual net migration rose to a record in August as Indian and Chinese students continued to flock to courses offered by local educational institutions vying for the lucrative business.
But the rising numbers were "a double-edged sword" according to Westpac senior economist Felix Delbrück, who warned this could contribute to a rise in unemployment.
"We're expecting unemployment to rise over the coming year. The main reason is because the economy is slowing but obviously that's coinciding with continued strong immigration and population growth," he said.
"If the economy slows and labour demand slows that can resolve itself in one of two ways - either you get people leaving the country or if population growth continues you get unemployment rising. It looks like we're going down the second route."
New Zealand had a net gain of 60,300 migrants in the August year, the 13th straight month a record has been set, Statistics New Zealand said. Migrant arrivals rose 13 percent to a record 117,900, while departures fell 5 percent to 57,600.
Foreign students have been a boon to local education businesses, with their contribution growing faster compared to fees generated by local students. In the latest year, student visas rose by 6,400 to 26,800. Of those, 10,600 were from India and 5,100 from China.