Income Tax Guide - NZ Tax Calculator
💰 Understanding NZ Income Tax
New Zealand uses a progressive income tax system where higher income is taxed at higher rates. Understanding tax brackets, marginal vs effective rates, and how PAYE works helps you plan financially and minimise tax liability legally.
Income Tax Rates (current, from 1 April 2025)
| Annual Income | Tax Rate | Tax on Bracket |
|---|---|---|
| $0 - $15,600 | 10.5% | Up to $1,638 |
| $15,601 - $53,500 | 17.5% | Up to $6,632.50 |
| $53,501 - $78,100 | 30% | Up to $7,380 |
| $78,101 - $180,000 | 33% | Up to $33,627 |
| Over $180,000 | 39% | No limit |
How Progressive Tax Works
Example: $75,000 income
Marginal vs Effective Tax Rate
Marginal Rate:
Tax rate on your last dollar earned. Determines tax on additional income like bonuses or raises.
Effective Rate:
Average tax rate across all income. Total tax divided by total income.
| Income | Total Tax | Marginal Rate | Effective Rate |
|---|---|---|---|
| $30,000 | $4,158 | 17.5% | 13.9% |
| $60,000 | $10,220.50 | 30% | 17.0% |
| $100,000 | $22,877.50 | 33% | 22.9% |
| $200,000 | $57,077.50 | 39% | 28.5% |
PAYE (Pay As You Earn)
Employers withhold PAYE tax from wages automatically each pay period.
How PAYE Works:
- Employer calculates tax on each payment
- Deducts PAYE before paying you
- Sends PAYE to IRD monthly or twice-monthly
- You receive net (after-tax) pay
PAYE Calculation Example:
Tax Codes
Tax codes tell employers how much PAYE to withhold:
| Code | Meaning | Use When |
|---|---|---|
| M | Primary income | Main job, includes tax-free threshold |
| ME | Primary + ESCT | Main job with student loan |
| SB | Secondary income | Second job, no tax-free threshold |
| S | Secondary lower | Small second income |
| ST | Secondary higher | Large second income |
Using M code on second job: Under-withheld tax, owing money at year end
Using SB code on main job: Over-withheld tax, giving IRD interest-free loan
Always use M (or ME with student loan) for highest income source, SB for additional jobs.
Self-Employed Tax
Provisional Tax:
Self-employed pay tax in instalments during the year, not at year end.
Example:
Reducing Tax Legally
1. Income Splitting (Couples):
2. Business Expenses (Self-Employed):
- Home office deductions
- Vehicle running costs
- Equipment and supplies
- Professional development
3. KiwiSaver Contributions:
Tax-deductible for self-employed up to certain limits.
4. Charitable Donations:
🔢 Tax Calculations
Example 1: Employee $55,000 Salary
Example 2: High Earner $220,000
Example 3: Second Job Income
Main job: $45,000, Second job: $15,000
Wrong Way (Both use M code):
Right Way (M + SB):
Example 4: Self-Employed Business
Example 5: Bonus Impact
Salary $95,000, Bonus $10,000
🌍 Real-World Tax Scenarios
| Year | Income | Tax | Take-home | Effective Rate |
|---|---|---|---|---|
| 2020 (Graduate) | $48,000 | $7,308 | $40,692 | 15.2% |
| 2022 (Promoted) | $70,000 | $13,220.50 | $56,779.50 | 18.9% |
| 2024 (Senior) | $105,000 | $24,527.50 | $80,472.50 | 23.4% |
| 2026 (Manager) | $150,000 | $39,377.50 | $110,622.50 | 26.3% |
Observation: Each promotion increases effective rate. At $150K, keeping 73.7% of gross income.
Employee Option:
Contractor Option:
Salary $75,000 + Rental $15,000
🎯 Test Your Knowledge
Quiz on NZ Income Tax
Frequently Asked Questions
What are the income tax rates in New Zealand for 2026/27?
New Zealand uses progressive brackets: 10.5% up to $15,600, 17.5% to $53,500, 30% to $78,100, 33% to $180,000, and 39% above $180,000. Only the income in each band is taxed at that band rate.
How do tax brackets work?
They are marginal. Moving into a higher bracket only taxes the portion of income above the threshold at the higher rate, not your whole income, so a pay rise never leaves you worse off overall.
Is income tax the only deduction from my pay?
No. PAYE income tax is deducted alongside the ACC earner levy, and, where they apply, KiwiSaver contributions and student loan repayments. Your take-home pay is what remains after all of these.
Do I need to file a tax return?
Most salary and wage earners do not. Inland Revenue issues an automatic income tax assessment after the tax year. You may need to act if you have untaxed income or want to claim certain credits.
Related guides
- Bonds and Fixed Income, a related guide in the same area.
- Budgeting on an Irregular Income, a related guide in the same area.
- Dividend Income - How Shares Pay You (NZ), a related guide in the same area.
Situations like yours. The 4 situations worked through above sit alongside 22 more about understanding your pay and tax, each with the sums shown.