Most NZ university students work part-time — 10–20 hours per week is common, and employers are generally well set up to accommodate student schedules. Getting your tax and KiwiSaver settings right from the start avoids end-of-year surprises.
Use tax code "M" for your primary/only job (or "M SL" if you have a student loan). At 18+, you'll be automatically enrolled in KiwiSaver — you can opt out within 56 days but you'll lose the employer contribution. Realistically expect $22–$28/hour in most student roles (retail, hospitality, admin). A 10-hour week yields approximately $220–$280 gross before tax.
Your Tax Code as a Student
When starting a job, your employer gives you a tax code declaration (IR330). The right code depends on your situation:
| Situation | Tax Code |
|---|---|
| This is your only job (no student loan) | M |
| Only job + you have a student loan | M SL |
| Second/part-time job while employed elsewhere | SB (secondary) |
| Student Allowance + part-time work | Part-time work uses M; allowance uses its own deduction |
Using the wrong tax code means you either overpay tax (refunded at year end) or underpay (bill at year end). The “M” code is correct for most students with one employer.
KiwiSaver Auto-Enrolment
Once you turn 18, you are automatically enrolled in KiwiSaver when you start any new job. This means:
- 3% of your gross pay is deducted and contributed to your KiwiSaver fund (unless you choose 4%, 6%, 8%, or 10%)
- Your employer contributes a minimum of 3% — this is effectively a pay top-up
- After 56 days, you can no longer opt out for the current employment period
Should you opt out?
Almost always: no. The employer’s 3% contribution is free money. On a $300/week gross wage, the employer adds $9/week to your KiwiSaver — $468/year of free money. Your own contribution ($9/week) reduces your take-home but builds long-term savings.
The only scenario where opting out makes sense: severe financial hardship where you genuinely cannot afford any reduction in take-home pay. This is rare.
Student Loan Deductions from Wages
If you have a student loan, use tax code M SL. This triggers automatic weekly deductions at 12% on income above the threshold ($22,828/year = $439/week).
At typical student working hours (10–15 hours/week, $23/hr), your annual income from work is:
- 10 hrs/week: ~$11,960/year — below the threshold, no student loan deductions
- 15 hrs/week: ~$17,940/year — still below threshold
- 20 hrs/week: ~$23,920/year — just above threshold; ~$130/year in deductions
Most students working under 20 hours/week will not have student loan deductions triggered from part-time work alone — but check annually if hours increase.
Realistic Earning Expectations
| Job Type | Typical Hourly Rate | Notes |
|---|---|---|
| Retail (supermarket, clothing, etc.) | $23–$28 | Most common student role; often flexible rostering |
| Hospitality (café, restaurant) | $23–$27 + tips | Weekend and evening premium in some roles |
| Tutoring (peer/private) | $25–$60 | Requires subject knowledge; flexible |
| Library or admin (university) | $23–$28 | University employers; often student-friendly scheduling |
| IT support / help desk | $25–$35 | For students with relevant skills |
| Casual labouring / events | $23–$30 | Variable hours; physically demanding |
Weekly Income at Typical Hours
| Hours/Week | $23/hr (gross) | $26/hr (gross) | Est. Take-Home (M code) |
|---|---|---|---|
| 10 hours | $230 | $260 | ~$200–$225 |
| 15 hours | $345 | $390 | ~$300–$335 |
| 20 hours | $460 | $520 | ~$390–$445 |
Take-home estimates assume standard M tax code deductions, no student loan deduction (income below threshold).
Balancing Work and Study
Research consistently shows that up to 15 hours/week of part-time work has minimal impact on academic performance for most students. Beyond 20 hours/week, academic performance tends to decline.
Practical guidance:
- Semester time: 10–15 hours/week is ideal
- Exam periods: Reduce to 5–10 hours or take planned study leave
- Semester breaks and summer: Increase to 25–40 hours; build savings and holiday pay
Communicate your study schedule to your employer from the start — most retail and hospitality managers in NZ are accustomed to accommodating student schedules.
Holiday Pay and Your Rights
As a permanent or fixed-term employee (even part-time), you are entitled to:
- 4 weeks’ annual leave per year (pro-rated if less than 12 months)
- 8% holiday pay on any casual/irregular hours worked (often paid as you go for truly casual workers)
- 10 days’ sick leave per year (after 6 months’ employment)
- Public holiday entitlements
Your employer cannot avoid these entitlements by calling you “casual” unless the employment relationship is genuinely casual (no guaranteed hours, no regular work pattern).
Frequently Asked Questions
What happens to my Student Allowance if I earn too much?
Student Allowance abates once your weekly earnings exceed approximately $216/week. Above this threshold, your allowance reduces. Report income changes to StudyLink within 5 days — see the Student Allowance guide for full abatement details.
Do I need to file a tax return?
If you have only one employer and the correct tax code, IRD handles your tax automatically. You may receive a tax refund via automatic assessment. You do not need to file an IR3 unless you have additional income sources (freelancing, investment income, overseas income).
Should I contribute to KiwiSaver as a student?
Yes — start at the minimum 3% contribution rate to capture the employer contribution. Once you have stable income, consider increasing to 4% or 6%. The NZ government member tax credit (up to $521/year) also applies once you’re contributing.