Registering for GST changes how you price, record sales and manage cash. It is not just a new form to file. Here is a practical GST checklist for a new New Zealand business.
When do you need to register for GST?
You generally need to register when your taxable turnover was at least $60,000 in the last 12 months, or you expect it to reach $60,000 in the next 12 months. You may also need to register if you add GST to your prices. Voluntary registration below $60,000 is possible, but it means charging GST where required, filing returns, keeping GST records and paying any net GST.
Turnover means sales from your taxable activity, not profit. Watch the rolling 12-month total rather than only the financial year. If a large contract could take you over the threshold, review the position before invoicing it.
Update your prices and invoices
Once registered, make it clear whether prices are GST-inclusive or GST-exclusive. Your invoices need the right taxable-supply information, including the supplier details, date, description, amount and GST treatment. Do not add GST to old invoices without checking when the registration applies.
Tell regular customers about the change before the first GST-inclusive invoice. For consumer pricing, decide whether the advertised price already includes GST. For business customers, explain the GST-exclusive amount and the total payable.
Choose a filing rhythm that you can maintain
GST returns can be filed on a one-month, two-month or, where eligible, six-month taxable period. A shorter period gives you more regular visibility but creates more filing work. A two-month rhythm is common for many small businesses.
Before each return:
- reconcile every bank and payment-platform account
- check sales invoices and credit notes
- code purchases consistently
- keep taxable, zero-rated and exempt activity separate
- review large, unusual or mixed-use costs
- confirm the filing and payment date in myIR
The GST payable is GST collected on taxable sales less eligible GST on business purchases, with adjustments where applicable. GST is not profit and should not be treated as spare cash.
Keep evidence for the return
Save invoices, receipts, bank records, credit notes and calculations. Keep tax records for at least 7 years. If you use Xero, attach source documents to transactions and use bank rules carefully—automation is useful, but it still needs review.
What if you cannot pay?
File the return even if the cash is not ready, then contact Inland Revenue or your adviser promptly about the balance. Ignoring the filing can add penalties and interest and removes useful visibility. A cash-flow forecast can show whether the issue is a one-off timing problem or a pricing and margin problem.
GST rules include special treatment for some supplies, assets, mixed-use costs and property transactions. This guide is general information, not personalised tax advice.
Make the next step practical
Use the ideas here as a starting point for a better conversation. The right answer depends on your records, timing and circumstances, so keep the assumptions visible and revisit them when something changes.