PAYE NZ: A Plain-English Guide for Small Business Employers

Taking on your first employee is a significant milestone for any small business. It is also the moment you become responsible for one of New Zealand's most important tax obligations: PAYE — Pay As You Earn.

PAYE is the system by which employers deduct income tax from employees' wages and pay it directly to IRD on their behalf. Get it right and it runs smoothly in the background. Get it wrong and you face penalties, interest, and potentially a very unhappy IRD.

This guide explains how PAYE works in New Zealand, what you need to do each payday, and what to watch out for.

PAYE stands for Pay As You Earn. It is the mechanism by which income tax is collected from employees at the source — meaning the employer deducts tax from each pay and sends it to IRD, rather than the employee paying a lump sum at year end.

As an employer, you are acting as a collection agent for IRD. The tax belongs to IRD from the moment it is deducted — it is not your money to hold or use.

You must deduct PAYE from payments to:

• Employees — anyone on your payroll receiving salary or wages
• Shareholder-employees — company directors or shareholders who receive a salary from the company
• Casual workers — including seasonal and temporary staff
• Working proprietors — in some business structures

You do not deduct PAYE from payments to genuine contractors. However, the employee vs contractor distinction is one IRD scrutinises closely — getting this wrong is a common and costly mistake. See our guide on employee vs contractor in NZ for the full picture.

If you are setting up payroll for the first time, our complete payroll guide for NZ small business covers the step-by-step process from employer registration through to your first pay run.

PAYE is calculated based on the employee's tax code and their annualised income — that is, what their pay rate would amount to over a full year.

New Zealand's personal income tax rates for 2025–2026 are:

Because PAYE is calculated on annualised income, a part-time employee earning $400 per week is taxed as if they earn $20,800 per year — not at a flat rate on each payment.

Every employee must provide you with a completed IR330 tax code declaration before their first pay. The most common tax codes are:

• M — main job, no student loan
• M SL — main job, with student loan
• S — secondary job
• SB — secondary job, income under $14,000
• CAE — casual agricultural employee
• WT — schedular payments (contractors who have elected to have tax deducted)

If an employee does not provide a tax code, you must use the no-notification rate of 45% — the highest rate — until they do.

Since April 2019, New Zealand employers have been required to file payday filing — submitting employment information to IRD on or before each payday (or within two working days of payday for some employers).

Each payday filing submission includes:

• Employee details (name, IRD number, tax code)
• Gross earnings for the period
• PAYE deducted
• KiwiSaver deductions (employee and employer contributions)
• Student loan deductions (if applicable)
• Child support deductions (if applicable)
• Employer superannuation contribution tax (ESCT)

Most payroll software — including Xero Payroll, MYOB, and PayHero — handles payday filing automatically. If you are processing payroll manually, you can file through myIR.

The frequency of your PAYE payments depends on how much PAYE you deduct:

For most small businesses, PAYE is due by the 20th of the month following the pay period. So PAYE deducted in August is due to IRD by 20 September.

Missing this deadline triggers an employer monthly schedule penalty — currently 1% of the amount not paid on time, plus use-of-money interest.

As an employer, you have KiwiSaver obligations that run alongside PAYE:

You must deduct KiwiSaver contributions from employees' gross pay at their chosen rate (3%, 4%, 6%, 8%, or 10%). These are remitted to IRD along with PAYE.

You must contribute a minimum of 3% of the employee's gross earnings to their KiwiSaver account. This is in addition to the employee's own contribution — it is not taken from their pay.

Employer contributions are subject to Employer Superannuation Contribution Tax (ESCT), which is deducted from the employer contribution before it is paid to IRD.

When a new employee starts, you must:

1. Automatically enrol them in KiwiSaver (unless they are exempt)
2. Deduct contributions from their first pay
3. Give them the option to opt out within 56 days of starting

If an employee opts out within the opt-out window, you refund their contributions and stop deducting.

If an employee has a student loan, you must deduct repayments from their pay. The standard repayment rate is 12 cents per dollar earned above the repayment threshold ($24,128 for the 2025–2026 year).

Student loan deductions are included in your payday filing and remitted to IRD with your PAYE payment.

Each month, you file an Employer Monthly Schedule (EMS) summarising all PAYE, KiwiSaver, student loan, and other deductions for the month. This is separate from the individual payday filings and provides IRD with a monthly reconciliation.

The EMS is due by the 20th of the following month, at the same time as your PAYE payment.

This is the most expensive mistake. If IRD determines that someone you treated as a contractor was actually an employee, you become liable for all the PAYE that should have been deducted — plus penalties and interest. The test is based on the nature of the working relationship, not what the contract says.

If an employee gives you the wrong tax code — or you apply the wrong one — they will either overpay or underpay tax during the year. While IRD will square this up at year end, it can cause friction with employees who end up with a tax bill.

Late payday filings attract penalties. If you are using payroll software, set up automatic filing. If you are filing manually, build the deadline into your calendar.

Holiday pay has specific rules under the Holidays Act 2003. Ordinary weekly pay and average weekly earnings calculations can be complex, particularly for employees with variable hours or irregular pay. Getting this wrong affects both the employee and your PAYE calculations.

Employer KiwiSaver contributions are not tax-free. ESCT must be deducted and remitted to IRD. The ESCT rate depends on the employee's income — it ranges from 10.5% to 39%.

For most small businesses with more than one or two employees, payroll software is worth the cost. It:

• Calculates PAYE, KiwiSaver, and student loan deductions automatically
• Files payday returns to IRD directly
• Handles holiday pay calculations
• Produces payslips for employees
• Integrates with your accounting software (Xero, MYOB)

Popular options in New Zealand include Xero Payroll, MYOB, PayHero, and iPayroll. Costs range from around $10 to $30 per month for small teams.

PAYE is one of those obligations where the cost of getting it wrong significantly exceeds the cost of getting it right. If you are taking on employees for the first time, or if you have inherited a payroll situation that does not feel right, it is worth getting professional advice early.

At Eastmure & Associates, we help businesses across New Zealand set up payroll correctly from day one — and we can review existing payroll arrangements to identify any issues before IRD does.

Need help with your accounts or tax? Contact Eastmure & Associates. Looking at the bigger picture for your business? See our Business Advisory page.