NZ tax for working holiday makers: the full guide

New Zealand makes tax relatively painless for most working holiday makers — if you set things up correctly. The two things that cause the most damage are starting work without an IRD number and using the wrong tax code. Both are avoidable in under an hour.

Why you need an IRD number before you start work

An IRD number is New Zealand's equivalent of a tax file number. If you don't give your employer one, they are legally required to deduct tax at the 'no-notification' rate of 45% — the highest rate in the system. The application is free and takes around 10 working days to arrive.

Apply online through the IRD website as soon as you arrive. If you hold a working holiday visa, you'll likely apply through the 'new arrival' process, which allows the IRD to verify your identity with Immigration New Zealand — no separate documents required.

• Apply free at ird.govt.nz once you're in New Zealand
• Have your passport, visa details, and a New Zealand address ready
• Expect your IRD number within 10 working days of applying
• Give it to your employer immediately — don't wait until your first paycheck

PAYE and tax codes explained

New Zealand taxes employment income on a pay-as-you-earn (PAYE) basis. Your employer deducts tax from every paycheck according to the tax code you declare on an IR330 form.

For most working holiday makers with one job, the correct tax code is 'M' (main income, no student loan). If you have a second job or a secondary source of income, use 'S' (secondary income) for that employer. Using the wrong code — especially 'M' for a second job — can leave you with a tax bill at year-end.

• Fill in an IR330 Tax code declaration form for every employer
• Main job, no student loan: use tax code M
• Second job or secondary income: use tax code S
• Do not start work without handing your employer a completed IR330

Automatic end-of-year assessment

If all of your income for the year has been taxed through PAYE — which is typical for wage and salary earners — IRD will calculate your end-of-year tax automatically. No action needed from you.

The NZ tax year runs from 1 April to 31 March. IRD usually issues automatic assessments between late May and the end of July after the tax year closes. If you overpaid during the year, the refund is deposited directly into the bank account you have registered in myIR.

Keep your New Zealand bank account open long enough to receive the refund — or update your bank details in myIR to an overseas account before you leave.

When you need to file an IR3 instead

If you leave New Zealand before the end of the tax year (31 March) and want your refund sooner, you can file an IR3 individual tax return for the period you worked. The IR3 is also required if you had income that wasn't fully taxed at source — for example, self-employment income, rental income, or income over NZD 200 that IRD wasn't notified about.

Keep every payslip. The IR3 requires your total income and total tax deducted for the period. Missing payslips are the single biggest cause of delays.

• Leaving NZ early? File an IR3 to claim your refund without waiting for automatic assessment
• Had cash-in-hand or self-employment income? You must declare it in an IR3
• Collect every payslip — you'll need them all
• IR3 returns can be filed online through myIR

How Tern helps

Tern prompts your IRD number application at signup so you never miss the no-notification trap. It stores every payslip as it arrives, flags if your employer appears to be using the wrong tax code, and reminds you to file an IR3 — or to update your myIR bank details — before you catch your flight home.