GST Return Due 28 August 2026: What NZ Businesses Need to Know
If you are GST registered in New Zealand, the GST return due 28 August 2026 is an important tax deadline to keep in mind. The deadline applies to the taxable period ending 31 July 2026.
Your GST return and any GST payment owing are generally due on the same day. If your business has a GST obligation for the period, you should make sure your accounting records are up to date, your GST calculation is accurate, and your return is filed by the deadline.
If you are unable to pay your full GST liability in one lump sum, you should not simply ignore the amount. Inland Revenue provides instalment arrangements for eligible tax debt, which can allow repayments to be made over time.
This guide explains the GST return due 28 August 2026, how to file your return, what happens if you cannot pay, and what New Zealand businesses should do before the deadline.
GST Return Due 28 August 2026
The GST return due 28 August 2026 relates to the taxable period ending 31 July 2026. GST registered businesses should file their return and pay any GST owing by the applicable due date.
- Taxable period: 31 July 2026
- GST return due date: 28 August 2026
- GST payment due date: 28 August 2026
- Filing can generally be completed through myIR or eligible accounting software
- Nil GST returns still need to be filed
- Businesses unable to pay in full can consider an instalment arrangement
Inland Revenue confirms that GST returns must be filed for every taxable period, even where the return is nil, and the GST payment is due on the same day as the return.
When Is the GST Return Due in August 2026?
For the taxable period ending 31 July 2026, the GST return due 28 August 2026 means that both the GST return and any payment due are required by 28 August.
| GST information | Date |
|---|---|
| Taxable period ending | 31 July 2026 |
| GST return due | 28 August 2026 |
| GST payment due | 28 August 2026 |
Inland Revenue’s GST calendar confirms that the return and payment for the taxable period ending 31 July are due on 28 August.
Who Needs to File a GST Return?
If your business is registered for GST, you generally need to file a GST return for each taxable period.
This requirement applies even if your business has no GST to pay for the period. A nil return may still need to be filed.
This is important for businesses preparing for the GST return due 28 August 2026. Having no GST liability does not automatically mean that you can skip the return.
Inland Revenue states that businesses must file a GST return for every taxable period, including nil returns.
What Information Do You Need for Your GST Return?
Before filing your GST return, you need to make sure your business records are complete and accurate.
Depending on your accounting basis and circumstances, you may need to review:
- Total sales and income
- Business purchases
- Business expenses
- GST collected
- GST paid
- GST adjustments
- Other relevant GST information
Inland Revenue recommends calculating your sales, income, purchases and expenses before working out your GST position.
This is particularly important before the GST return due 28 August 2026, because errors in your accounting records can result in an incorrect GST return.
How to File Your GST Return Through myIR
One of the easiest ways to manage your GST return is through myIR.
To file through myIR:
- Log in to your myIR account.
- Go to Returns and transactions next to your GST account.
- Select File return next to the relevant taxable period.
- Choose whether you are filing a nil return if applicable.
- Enter or review the required GST information.
- Check your figures carefully.
- Submit your GST return.
- Arrange payment of any GST owing by the due date.
Inland Revenue’s current instructions confirm that myIR users can select the GST account, choose the relevant return period and select the File return option.
Can You File GST Through Accounting Software?
Some businesses can file GST returns directly through compatible accounting software.
The advantage is that relevant accounting information may be transferred into the GST return, reducing the need to manually enter figures into myIR. Some software also provides confirmation that the return has been filed.
If your business uses accounting software, check whether GST filing is supported by your provider.
This can make recurring GST compliance easier, particularly when your business has regular monthly or two-monthly GST obligations.
What If You Have No GST to Pay?
One common misunderstanding is that a business does not need to file a GST return if there is no GST to pay.
That is not correct.
A GST registered business generally needs to file a return for every taxable period, including where the return is nil.
Therefore, if your business has no GST to pay for the period ending 31 July 2026, you should still check your GST account and complete the required filing by the GST return due 28 August 2026.
Inland Revenue confirms there are no exceptions to the requirement to file a GST return for every taxable period.
What If You Have GST to Pay?
If your GST calculation shows that you owe Inland Revenue money, the payment is generally due on the same date as your GST return.
For the taxable period ending 31 July 2026, that means the payment deadline is 28 August 2026.
If you are preparing for the GST return due 28 August 2026, do not treat filing and payment as completely separate deadlines. You need to deal with both.
What If You Cannot Pay Your GST in Full?
Cash-flow pressure can make a GST payment difficult, particularly for small businesses with fluctuating revenue or customers who have not yet paid their invoices.
If you cannot pay your GST debt in full by the due date, do not ignore the liability.
Inland Revenue allows eligible taxpayers to apply for an instalment arrangement where tax debt cannot be paid in full by the due date.
An instalment arrangement can allow agreed repayments to be made weekly, fortnightly or monthly.
This means a business dealing with the GST return due 28 August 2026 may have an option to manage the resulting tax debt rather than attempting to pay the entire amount immediately.
How to Set Up a GST Instalment Arrangement in myIR
If you cannot pay your tax debt in full, you can apply for an instalment arrangement through myIR.
According to Inland Revenue, you can start the process from the myIR homepage by selecting:
“Request an instalment arrangement”
You will need to consider how much you can afford to pay and choose an appropriate repayment frequency.
Available repayment frequencies can include:
- Weekly
- Fortnightly
- Monthly
Inland Revenue explains that an instalment arrangement is intended for debt that cannot be paid in full by the due date or for overdue debt.
Does an Instalment Arrangement Stop Interest and Penalties?
An instalment arrangement does not necessarily eliminate interest and penalties associated with overdue tax debt.
Inland Revenue states that overdue debt may result in use-of-money interest and penalties.
Therefore, if your business knows that it will struggle with the GST return due 28 August 2026, it is better to review your options early rather than simply allowing the debt to become overdue.
GST Return Due 28 August 2026: Business Checklist
Use this checklist before the GST return due 28 August 2026.
- Reconcile your bank accounts. Make sure your business transactions are recorded correctly.
- Review your sales. Check invoices, sales records and GST collected.
- Review your purchases. Make sure eligible business expenses have been recorded correctly.
- Check GST adjustments. Review whether any adjustments need to be included.
- Calculate your GST position. Determine whether you have GST to pay or a refund.
- File your GST return. Submit the return through myIR or your approved filing method.
- Pay your GST. Arrange payment of any GST owing by the applicable due date.
- Consider an instalment arrangement if necessary. If you cannot pay the full amount, review your options through myIR.
Common GST Filing Mistakes to Avoid
1. Waiting Until the Last Day
Leaving your GST return until 28 August can create unnecessary pressure, especially if your accounting records require corrections.
2. Forgetting to File a Nil Return
A nil GST position does not automatically remove your filing obligation.
3. Filing but Forgetting to Pay
Submitting the GST return does not automatically settle your GST liability. Payment must also be made where an amount is owing.
4. Using Incorrect GST Figures
Errors in sales, purchases or adjustments can result in an incorrect GST return.
5. Ignoring a GST Debt
If you cannot pay your GST in full, consider whether an instalment arrangement or other assistance may be available.
6. Not Setting Aside Money for GST
Businesses can experience cash-flow problems when GST collected from customers is used for other operating expenses.
Why GST Can Create Cash-Flow Problems for Small Businesses
A GST liability does not always correspond with the amount of cash available in your business bank account.
For example, a business may have issued invoices and recorded sales but still be waiting for customers to pay.
At the same time, the GST liability may still need to be accounted for.
Other factors that can contribute to GST cash-flow pressure include:
- Slow-paying customers
- Unexpected business expenses
- Seasonal revenue fluctuations
- Using GST collections for operating costs
- Poor cash-flow forecasting
- Rapid business growth
Preparing for deadlines such as the GST return due 28 August 2026 should therefore be part of your regular cash-flow planning.
How to Prepare for Future GST Deadlines
Rather than treating GST as an unexpected tax bill, businesses can build GST management into their regular accounting process.
Keep GST Funds Available
Consider maintaining a separate reserve for GST obligations so that money collected for GST is not accidentally spent on other expenses.
Reconcile Regularly
Regular bookkeeping can help identify errors before your GST filing deadline.
Monitor Outstanding Invoices
Keep track of customers who have not yet paid so you can understand your cash-flow position.
Forecast Tax Payments
Include GST and other tax obligations in your forward-looking cash-flow forecast.
Review Your Filing Frequency
Eligible businesses may be able to change their GST filing frequency through myIR. Your appropriate filing frequency depends on your circumstances and Inland Revenue’s requirements.
GST Due Dates for New Zealand Businesses
For businesses following the standard GST calendar, Inland Revenue currently shows the following dates:
| Taxable Period Ending | GST Return & Payment Due |
|---|---|
| 30 June 2026 | 28 July 2026 |
| 31 July 2026 | 28 August 2026 |
| 31 August 2026 | 28 September 2026 |
| 30 September 2026 | 28 October 2026 |
The GST return due 28 August 2026 specifically relates to the taxable period ending 31 July 2026.
Businesses should check their own GST filing frequency and myIR account because individual circumstances can affect applicable filing dates.
What If You Are Already Behind on GST?
If your business has already missed GST payments or accumulated tax debt, do not ignore the balance.
Inland Revenue states that individuals, companies, partnerships and trusts may apply for an instalment arrangement or other financial relief where they cannot pay tax debt.
If you are already dealing with overdue tax, read our related guide:
IRD Payment Plan NZ: How to Set Up an Instalment Arrangement
You can also read our guide to IRD overdue tax messages:
IRD Overdue Tax Message 2026: Essential Guide for NZ Taxpayers
Frequently Asked Questions About the GST Return Due 28 August 2026
When is the GST return due for July 2026?
For the taxable period ending 31 July 2026, the GST return and payment are due on 28 August 2026.
What is the GST return due 28 August 2026?
The GST return due 28 August 2026 relates to the taxable period ending 31 July 2026. Businesses need to file the applicable GST return and pay any amount owing by the due date.
Do I have to file a GST return if I have no GST to pay?
Yes. GST registered businesses generally need to file a GST return for every taxable period, including when the return is nil.
Can I pay my GST debt in instalments?
If you cannot pay your tax debt in full by the due date, you may be able to apply for an instalment arrangement through myIR. Inland Revenue allows agreed repayments on a weekly, fortnightly or monthly basis.
Can I set up a GST payment plan through myIR?
You can apply for an instalment arrangement through myIR if you cannot pay your tax debt in full by the due date. From the myIR homepage, select Request an instalment arrangement.
Is GST payment due on the same day as the GST return?
Yes. Inland Revenue states that the GST payment is due on the same day as the GST return.
How do I file my GST return online?
You can generally file your GST return through myIR. You may also be able to file through compatible accounting software.
What happens if I miss my GST deadline?
Late filing and payment may result in penalties and interest depending on the circumstances. If you know that you cannot pay, consider contacting Inland Revenue or applying for an instalment arrangement.
Need Help With Your GST or IRD Tax Debt?
GST compliance involves more than simply submitting a return. Businesses need to keep accurate records, understand their filing obligations and plan for payments.
If your business is preparing for the GST return due 28 August 2026 or you are already dealing with GST or other tax debt, understanding your options early can help you manage the situation more effectively.
Explore the practical tax resources available from IRD Guru:
Official New Zealand GST Resources
Important Disclaimer
This article is provided for general information and educational purposes only. It does not constitute personalised tax, accounting, legal or financial advice.
GST obligations and Inland Revenue requirements can change. Always check your specific circumstances and the latest information available from Inland Revenue or consult a qualified tax professional.
IRD Guru is an independent tax information resource and is not affiliated with or operated by Inland Revenue New Zealand.