Small business payroll: IRD, PAYE and KiwiSaver

Published Monday 23 March 2026

Table of contents

• What does payroll mean for small business?
• What's involved in payroll compliance?
• What are payroll deductions?
• Reporting to IRD
• Payroll options for small business
• How much does small business payroll cost?
• How to set up payroll for your small business
• Simplify your small business payroll
• FAQs on small business payroll

Key takeaways

• Choose payroll software over manual methods once you have three or more employees, as it reduces processing time from 1-2 hours to 10-15 minutes per pay run and automatically handles IRD filing requirements.
• Register as an employer with IRD and collect essential employee information including IRD numbers, tax codes, KiwiSaver status, and bank details before running your first payroll.
• Keep detailed payroll records for at least seven years as required by IRD, including employment agreements, tax forms, and payslips stored securely.
• File payday reports to IRD within two working days of each pay run, reporting employee pay amounts, PAYE tax withheld, and KiwiSaver contributions to maintain compliance.

What does payroll mean for small business?

Small business payroll is the process of paying your employees and managing the deductions that come out of their wages. It involves two core responsibilities:

• paying employees the correct amount at the right time, every pay period
• making accurate deductions for tax, KiwiSaver, and other obligations

There are strict rules around payroll in New Zealand. Complying with government requirements keeps your business in good standing.

What's involved in payroll compliance?

Payroll compliance means meeting all your legal obligations as an employer. In New Zealand, you must:

• make accurate payments and deductions every pay period
• provide each employee with a detailed payslip
• file and pay taxes to IRD on time
• send KiwiSaver and other deductions to the correct places
• keep payroll records for at least seven years (the IRD specifies these must be full and accurate wage records)

Getting these right helps you avoid penalties from IRD and maintain good relationships with employees.

What are payroll deductions?

Payroll deductions are amounts you withhold from an employee's gross pay before paying them. These fall into two categories.

Mandatory deductions include:

• PAYE (Pay As You Earn) income tax
• KiwiSaver contributions
• student loan repayments
• child support payments

Voluntary deductions may include:

• additional retirement contributions
• health insurance premiums
• charitable donations

You must process deductions in a specific order. Learn more in our guide to hiring staff.

Reporting to IRD

Payday filing is New Zealand's system for reporting employee pay information to IRD. Every time you run a pay, you must report:

• how much each employee was paid
• how much PAYE tax was withheld
• what KiwiSaver contributions were made

If you file electronically, you need to file this information within two working days of payday. Most payroll software submits these reports automatically, which helps you stay compliant without extra administration.

Payroll options for small business

The more employees you have, the more complex your payroll becomes. A mix of hourly wages, salaries, overtime, leave entitlements, and allowances means your payroll can look different every pay period.

There are four main ways to handle small business payroll:

• Spreadsheets or manual methods: Suitable for one or two employees with simple pay arrangements. Takes one to two hours per pay run. However, IRD doesn't accept spreadsheets for electronic payday filing. While new employers can file by paper for the first six months, you must file electronically after that if your annual PAYE and Employer Superannuation Contribution Tax (ESCT) is $50,000 or more, so you'll need another solution for reporting.
• Payroll software: Calculates pay, deductions, and tax automatically. Takes 10 to 15 minutes per pay run once set up. Popular New Zealand options include Xero Payroll, Smartly, and Thankyou Payroll.
• Payroll service providers: Outsource the entire process to specialists who handle calculations, payments, and filing. Best for businesses that want someone else to manage their payroll.
• Accountants and bookkeepers: Many can run payroll as part of their services. Find one through the Xero advisor directory.

How much does small business payroll cost?

Payroll costs depend on which method you choose and how many employees you have. Here's what to budget for each approach (see our small business budget guide):

• Spreadsheets: Cost nothing, but you'll spend one to two hours per pay run on manual calculations and still need a way to file with IRD.
• Payroll software: Costs NZ $8 to $50 per month as a base fee, plus $1 to $3 per employee. Most plans include automatic IRD filing and payslip generation.
• Payroll service providers: Cost $50 to $150 per month for small teams, depending on pay frequency and complexity.
• Accountants or bookkeepers: Charge $50 to $100 per hour or a fixed monthly fee as part of a broader service package.

The cheapest option isn't always the best value. Factor in the time you'll spend, the risk of errors, and whether the solution grows with your business, especially as IRD's business transformation program modernises its systems.

How to set up payroll for your small business

Setting up payroll takes some upfront work, but getting it right from the start saves time and keeps things running smoothly. Follow these steps:

1. Register as an employer with IRD. You'll receive an IRD number for your business if you don't already have one. This lets you file payday reports and pay PAYE.
2. Collect employee information. You need each employee's IRD number, tax code, KiwiSaver status, and bank account details. Use an IR330 tax code declaration form to capture this.
3. Choose your payroll method. Decide whether you'll use software, a service provider, or an accountant based on your budget and complexity.
4. Set up your pay schedule. Decide how often you'll pay employees (weekly, fortnightly, or monthly) and set consistent paydays.
5. Run a test pay. Before your first real payday, run through the process to check calculations and make sure IRD filing works correctly.
6. Keep records organised. Store employment agreements, tax forms, and payslips securely. You must keep these for at least seven years.

Simplify your small business payroll

Managing payroll doesn't have to be complicated. With the right system in place, you can pay employees accurately, stay compliant with IRD, and spend less time on administration.

If you're looking for software that handles calculations, automates payday filing, and keeps everything organised, Xero Payroll is designed for New Zealand small businesses. Get one month free.

FAQs on small business payroll

Common questions about managing payroll for your small business.

What is the best payroll option for a small business?

The best option depends on your team size, pay complexity, and budget. For one or two employees with simple wages, spreadsheets may work temporarily. For three or more employees, or anyone with variable hours or leave entitlements, payroll software or a service provider will save time and improve accuracy.

How much does a payroll system cost for a small business?

Payroll software typically costs NZ $8 to $50 per month plus $1 to $3 per employee. Outsourcing to a service provider or accountant generally costs more but includes expert support and reduces your administration time.

Can you use Xero for payroll?

Yes. Xero Payroll is built for New Zealand small businesses. It calculates earnings and deductions automatically, generates payslips, and files payday reports to IRD for you.

How long does it take to run payroll?

With payroll software, a straightforward pay run takes 10 to 15 minutes once everything is set up. Manual methods using spreadsheets typically take one to two hours, and that time increases as you add employees or deal with variations.

What happens if I make a payroll mistake?

If you underpay an employee, you must correct it as soon as possible. Accurate IRD reporting and tax deductions help you avoid penalties and interest charges. Using payroll software that automates calculations helps ensure accuracy.