Is the IELTS mandatory for a residence visa in New Zealand? 

Yes, demonstrating English language proficiency is mandatory for a residence visa in New Zealand. However, there are various ways to demonstrate English language proficiency and taking the IELTS is just one of them.

Immigration New Zealand (INZ) accepts various English language tests, including IELTS, Pearson Test of English (PTE) Academic, Cambridge English: Advanced (CAE), and Test of English as a Foreign Language (TOEFL) iBT, as well as other ways of demonstrating English language proficiency.

In addition to English language tests, some applicants may be exempt from demonstrating English language proficiency for a residence visa if they meet certain criteria, such as holding a passport from a country where English is the first language or completing an academic qualification in an English-speaking country.

It's important to check the specific English language requirements for the residence visa category you are applying for with INZ or a licensed immigration adviser to ensure that you meet the criteria.

Related pages: Study in New Zealand