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GST Returns: A Guide for NZ Businesses and Sole Traders

Prosaic Team10 min read

Understanding GST compliance is essential for New Zealand small business owners. This guide provides step-by-step instructions for completing GST returns, including filing frequency, online submission methods, accounting software options, and home office expense deductions.

What is GST?

GST (Goods and Services Tax) is a consumption tax applied to most goods and services in New Zealand. Businesses exceeding NZ$60,000 in annual turnover must register with the Inland Revenue Department and file returns regularly.

Filing frequency

Businesses can elect to submit returns on a monthly, two-monthly, or six-monthly schedule. The taxable period must align with your balance date. If no preference was indicated during registration, the IRD assigns a two-monthly filing cycle.

Online filing through myIR

The easiest way to file is through the IRD's myIR portal:

  1. Access the IRD website and log into your myIR account
  2. Navigate to the GST tab and select "File a GST return"
  3. Choose your taxable period and complete the required information
  4. Review and submit your return

Alternative method: GST101A form

Those without a myIR account or preferring paper filing can use the GST101A form, available from the IRD website.

Leveraging accounting software

Accounting platforms like Xero and MYOB streamline transaction tracking and GST calculations. Ensure your chosen software complies with New Zealand tax regulations and remains current with any rule changes.

Home office expense claims

Businesses using home space for work can claim proportional expenses as GST input tax. Calculate the percentage by dividing your business-use area by total home area, then apply this ratio to eligible expenses including:

  • Rent or mortgage interest
  • Insurance
  • Council rates
  • Utilities

Completing and submitting returns

Accuracy is critical when filing. Whether using myIR or GST101A forms, ensure all transaction details are precise and submitted before the due date to avoid penalties.

Payment processing

After filing, settle any GST liability by the specified deadline through online payment or other IRD-approved methods. Approved refunds are typically deposited to your nominated bank account.

Review and continuous improvement

After submission, evaluate your GST recording and filing systems to identify efficiency improvements for future periods. Tools like Prosaic can automate much of the data gathering, making each return faster than the last.

Professional guidance

Consulting certified tax advisors or accountants familiar with New Zealand tax law provides personalised compliance assistance and potential tax-saving opportunities specific to your situation.