How Bonus Tax Works in New Zealand
Understand how IRD taxes bonuses and extra pay in NZ — PAYE rates, ACC levy, KiwiSaver contributions, and strategies to keep more of your bonus.
Published 18 March 2026
If you’ve received a bonus at work, you might have noticed it was taxed heavily. Here’s how bonus tax actually works in New Zealand and why your take-home might be less than you expected.
What IRD Calls a Bonus
In New Zealand, Inland Revenue (IRD) classifies bonuses as “extra pay”. This includes one-off payments like performance bonuses, redundancy payments, back pay, and cashed-up annual leave. Extra pay is taxed differently from your regular salary.
How PAYE is Calculated on Bonuses
Your bonus is not taxed at a flat rate. Instead, IRD uses your marginal tax rate — the rate that applies to your highest dollar of regular income.
Here’s the process:
- Calculate the income tax on your annual salary alone
- Calculate the income tax on your annual salary plus the bonus
- The difference is the PAYE on your bonus
This means the tax rate on your bonus depends entirely on your regular salary. Someone earning $45,000 will pay a lower rate on a $5,000 bonus than someone earning $100,000.
NZ Income Tax Brackets (2025-26)
| Income Range | Rate |
|---|---|
| $0 – $15,600 | 10.5% |
| $15,601 – $53,500 | 17.5% |
| $53,501 – $78,100 | 30% |
| $78,101 – $180,000 | 33% |
| $180,001+ | 39% |
Example: You earn $65,000 and receive a $10,000 bonus. Your bonus pushes total income to $75,000. Since $75,000 is still within the 30% bracket ($53,501–$78,100), the entire $10,000 bonus is taxed at 30%. Total PAYE on the bonus: $3,000.
ACC Earner’s Levy on Bonuses
The ACC earner’s levy of 1.67% also applies to bonus payments, but only up to the annual cap of $152,790 (2025-26). If your salary already exceeds the cap, no ACC levy is deducted from your bonus. If your salary is below the cap but salary plus bonus exceeds it, only the portion below the cap attracts the levy.
KiwiSaver on Bonuses
If you’re enrolled in KiwiSaver, your employee contribution rate (3%, 4%, 6%, 8%, or 10%) applies to bonus payments just as it does to regular pay. Your employer also contributes their minimum 3% on the bonus amount.
This is worth considering — while it reduces your immediate take-home, it boosts your retirement savings and you benefit from the employer match.
Student Loan Repayments
If you have a student loan, repayments at 12% apply to the portion of your bonus that, combined with your salary, exceeds the annual repayment threshold of $24,128 (2025-26).
Can You Reduce Tax on a Bonus?
Unlike some countries, NZ doesn’t offer many options to reduce tax on a bonus. However:
- KiwiSaver voluntary contributions — you can make additional voluntary contributions, though these don’t reduce your taxable income
- Donations tax credit — if you donate part of your bonus to a qualifying charity, you can claim a 33.33% tax credit
- Timing — if your employer has flexibility on when the bonus is paid, receiving it in a tax year where your income is lower could reduce the marginal rate
Check Your Bonus Tax
Use our Bonus Tax Calculator to see exactly how much you’ll take home from your next bonus, including PAYE, ACC, KiwiSaver, and student loan deductions.