Payroll NZ: How to Set Up and Run Payroll for Your Small Business

Hiring your first employee is one of the most significant steps a small business owner takes. It is also the moment your tax obligations become considerably more complex. Suddenly you are responsible for PAYE deductions, KiwiSaver contributions, payday filing, holiday pay, and a range of other employer obligations — all with strict deadlines and real penalties for getting it wrong.

This guide walks you through everything you need to know to set up and run payroll in New Zealand as a small business owner.

Before you pay your first employee, you must register as an employer with IRD. You can do this through myIR — IRD's online portal.

To register, you will need:

• Your IRD number (company or individual, depending on your business structure)
• Your business name and address
• The date you expect to start paying employees
• An estimate of how much PAYE you expect to deduct annually (this determines your payment frequency)

Once registered, IRD will set up an employer account and you will be able to file payday returns and pay PAYE through myIR.

Before processing your first pay, you need the following from each employee:

Every employee must complete an IR330 before their first pay. This tells you which tax code to use when calculating PAYE. The most common 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

If an employee does not provide an IR330, you must use the no-notification rate of 45% — the highest rate — until they do.

New employees must be automatically enrolled in KiwiSaver unless they are exempt (under 18, over 65, or on a temporary visa). You must:

• Enrol them from their first pay
• Deduct contributions at their chosen rate (default is 3%)
• Make employer contributions of at least 3% of gross earnings
• Give them the option to opt out within 56 days

For direct credit payments — which is how almost all employees are paid in New Zealand.

You are legally required to have a written employment agreement with every employee before they start work. This is an Employment Relations Act requirement, not a tax one — but it is worth mentioning because it is commonly overlooked by first-time employers.

You can process payroll manually and file through myIR, but for most small businesses, payroll software is worth the investment. It automates the calculations, handles payday filing, and reduces the risk of errors.

If you are already using Xero for your accounting, Xero Payroll is the natural choice. It integrates directly with your accounts, handles payday filing automatically, and manages leave balances. Pricing is included in higher Xero plans or available as an add-on.

MYOB's payroll module is well-established and handles all New Zealand payroll requirements. It integrates with MYOB accounting software and supports payday filing.

PayHero is a New Zealand-specific payroll platform that handles the complexities of the Holidays Act particularly well. It is a good option for businesses with variable-hours employees or complex leave arrangements. Pricing starts from around $10 per month for small teams.

iPayroll is a cloud-based payroll system used by many New Zealand businesses. It is straightforward to use and handles all standard payroll requirements.

For most small businesses just starting out, Xero Payroll (if you are already on Xero) or PayHero are the most practical choices.

For a deeper look at how PAYE is calculated and what tax codes mean, see our PAYE guide for NZ small business employers.

Decide how often you will pay employees:

• Weekly — common for hourly workers and trades
• Fortnightly — the most common pay cycle in New Zealand
• Monthly — common for salaried employees

Your pay cycle affects your payday filing obligations — you must file with IRD on or before each payday (or within two working days for some employers).

When processing a pay run, your payroll software will calculate:

The employee receives their net pay — gross earnings minus all deductions.

After each pay run, you must file a payday return with IRD. This reports:

• Each employee's gross earnings
• PAYE deducted
• KiwiSaver contributions
• Student loan deductions
• Any other deductions

If you are using payroll software, this is typically done automatically at the time of the pay run. If you are filing manually, you have until two working days after payday.

PAYE must be paid to IRD by the 20th of the month following the pay period. So PAYE deducted in August is due by 20 September.

If your annual PAYE exceeds $500,000, you pay twice monthly (by the 5th and 20th). Most small businesses pay monthly.

You pay through myIR using your employer IRD number. Make sure to use the correct payment type code so IRD allocates the payment correctly.

Holiday pay is one of the most complex areas of New Zealand payroll, and it is where many small businesses get into trouble.

Under the Holidays Act 2003, employees are entitled to:

• Annual leave — 4 weeks per year after 12 months of employment
• Public holidays — 11 days per year (with alternative holiday if worked)
• Sick leave — 10 days per year after 6 months of employment
• Bereavement leave — 3 days for immediate family, 1 day for others
• Domestic violence leave — 10 days per year

The calculation of annual leave pay is particularly complex. You must pay the higher of:

1. Ordinary weekly pay at the time of the leave
2. Average weekly earnings over the previous 52 weeks

For employees with variable hours or irregular pay, this calculation can be genuinely difficult. Payroll software handles it automatically — manual calculations are error-prone.

In addition to payday filings, you must file an Employer Monthly Schedule (EMS) by the 20th of each month. This summarises all PAYE, KiwiSaver, and other deductions for the month and reconciles with your payday filings.

Your payroll software will generate this automatically.

IRD takes employer obligations seriously. Penalties for payroll errors include:

• Late filing penalties — for missing payday filing deadlines
• Late payment penalties — 1% of PAYE not paid on time, plus use-of-money interest
• Shortfall penalties — for errors in calculating PAYE (can be 20–150% of the shortfall, depending on whether it is treated as a mistake, gross carelessness, or evasion)

If IRD audits your payroll and finds that you have been treating employees as contractors, you can be held liable for all the PAYE that should have been deducted — potentially going back several years.

Setting up payroll correctly from the start saves significant time and money down the track. At Eastmure & Associates, we help Christchurch small businesses:

• Register as employers with IRD
• Choose and set up the right payroll software
• Understand their ongoing obligations
• Review existing payroll arrangements for compliance issues

If you are taking on your first employee or want to make sure your existing payroll is set up correctly, get in touch with our team for a fixed-fee quote.