Objective: To provide Reliable GST Solutions that help small business owners and startups in New Zealand understand how GST works, what it is, when registration is required, how to charge GST correctly, what expenses can be claimed back, and how to avoid the common mistakes that catch many new business owners off guard.
Key Takeaways
- GST is 15% on most goods and services sold in New Zealand, you collect it, then pass it to Inland Revenue
- You must register once your turnover hits or is expected to hit $60,000 in any 12 months
- The GST you collect is never your money, treating it as income is the most expensive mistake new business owners make
- Being registered also lets you claim back the GST you pay on business expenses
- Returns are due on time, regardless of whether you can pay, filing late and paying late are two separate penalties
- Voluntary registration before $60,000 is worth considering if you have significant startup costs
Table of Contents
- What GST Actually Is
- How GST Works in NZ, Inputs, Outputs, and What You Actually Pay
- When Small Businesses Must Register for GST
- GST Rules for Small Businesses, Pricing, Invoicing, and What You Charge
- Claiming GST Back on Business Expenses
- GST Basics for Startups, How to File Your Return
- GST Mistakes That Catch Small Business Owners Out
- FAQs
1. What GST Actually Is
GST stands for Goods and Services Tax. New Zealand introduced it in 1986, and it has remained at 15% since 2010. It applies to most goods and services sold throughout the country. Understanding the basics of GST is the first step toward implementing gst filing services auckland that help businesses stay compliant and manage their tax obligations effectively.
This is where a lot of new business owners get into trouble. The $115 hits the bank account, it all looks like revenue, and $15 of it gets spent. Then the GST return comes around, and there is a bill they cannot cover.
At Prudential Accounting & Taxation, this is one of the most common problems we see with first-year business owners, not dishonesty, just a misunderstanding of whose money it is. Set up a separate account for GST from the start. Set aside the GST portion every time you receive a payment. For a GST-inclusive payment, the GST portion is calculated as 3/23 of the total amount.
2. How GST Works in NZ, Inputs, Outputs, and What You Actually Pay
Understanding how GST works in NZ comes down to two numbers: what you collected, and what you paid.
Output GST is the GST you charged on your sales. You owe this to Inland Revenue.
Input GST is the GST included in your business expenses. You can claim this back.
When you file your return, you subtract input GST from output GST. Whatever is left, you pay. If your expenses were unusually high during that period and the input GST exceeds the output GST, Inland Revenue refunds you the difference.
A simple example:
- Sales of $2,300, including GST, output GST is $300
- Business expenses of $690, including GST, input GST is $90
- You pay Inland Revenue $210
This is why GST registration has a real upside beyond compliance. GST-registered businesses can usually claim GST on eligible business expenses, as long as GST was charged and the right records are kept.
3. When Small Businesses Must Register for GST
You are required to register for GST when your total turnover exceeds $60,000 in any 12 months, or when you can reasonably expect it to.
That threshold is based on total sales, not profit. If you charged customers $60,000 over the past year, even if most of it went back out on costs, you needed to register.
Once your taxable activity turnover reaches, or is expected to reach, $60,000 in a 12-month period, you need to register for GST with Inland Revenue.
If you miss the deadline, Inland Revenue can back-charge GST to the point when you should have registered, plus penalties.
Voluntary registration before $60,000 is worth thinking about if you are spending significantly on setup costs. Buying equipment, fit-out, stock, or professional services before your income picks up? All of that GST is claimable, but only if you are registered. Many startups leave real money on the table by waiting until they are forced to register.
One important note: registration is not easily undone. Once you are in the GST system, Inland Revenue has rules around when and why you can deregister. Do not register impulsively, think about whether it suits your situation.
4. GST Rules for Small Businesses, Pricing, Invoicing, and What You Charge
Once you are registered, GST applies to your New Zealand sales. The rate is 15%, and there are no exceptions for small turnover amounts.
How to show GST in your pricing:
- GST-inclusive, the price your customer sees already has GST built in. $115 means they pay $115, and $15 of that is GST. This is standard for retail and most consumer-facing businesses.
- GST-exclusive, the base price is shown without GST, and it is added separately. Common in trade and B2B, where your customers are usually GST-registered themselves and prefer to see the pre-tax figure.
Neither is right nor wrong, just be consistent and make sure your invoices are clear.
Not everything attracts 15% GST. Residential rent is exempt. Most exported goods and services are zero-rated, meaning GST is charged at 0%, which still lets you claim input GST on related costs. Financial services are exempt entirely, which means no GST is charged and no input GST is claimable.
For GST purposes, businesses must keep taxable supply information for sales and purchases. Many businesses still call this a tax invoice, but Inland Revenue now uses the wider term “taxable supply information. For supplies over $200, taxable supply information must be provided to a GST-registered buyer within 28 days if they request it, unless both parties agree to another date.
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5. Claiming GST Back on Business Expenses
Every business expense that includes GST is a potential refund. This is one of the practical advantages of being GST-registered that often gets underexplained to new business owners.
Expenses where GST is claimable:
- Accounting and legal fees
- Office rent and commercial premises
- Equipment, computers, and tools
- Business vehicles, for the business-use portion
- Software, subscriptions, and online services
- Stock, materials, and supplies
- Business travel and accommodation
The rule is straightforward: the expense must be genuinely for business use. Personal purchases do not qualify. Mixed-use items, a vehicle you use for both personal and business purposes, can only be claimed on the business-use percentage.
You must hold a valid tax invoice for every claim. A bank statement can help prove payment, but it may not be enough by itself to support a GST claim. Keep the invoice, receipt, or taxable supply information linked to the transaction.
If Inland Revenue reviews your return and you cannot produce the actual invoice, the claim gets disallowed.
Keep invoices from day one. Accounting software makes this much easier, most platforms let you photograph and attach receipts directly to transactions, so nothing gets lost before your return is due.
6. GST Basics for Startups, How to File Your Return
Filing a GST return means telling Inland Revenue your output GST and input GST for the period, paying what you owe, or receiving a refund. It is done online through the myIR portal.
Filing frequency options for GST in NZ:
Many small businesses file GST every two months, but the right filing frequency depends on the business and Inland Revenue’s GST filing options.
GST returns are generally due by the 28th of the month after the taxable period ends, with some Inland Revenue exceptions, including the March and November periods.
Miss that date, even by a day, and you get a late filing penalty.
Accounting software like Xero, MYOB, or Hnry pulls transaction data directly from your bank and calculates your GST figures automatically. Filing then takes minutes rather than hours. We at Prudential Accounting & Taxation strongly recommend connecting a bank feed to accounting software before your first return falls due, not after.
7. GST Mistakes That Catch Small Business Owners Out
These are the errors that come up repeatedly, especially in the first two years of trading.
- Spending the GST, The most common and most damaging. Move the GST portion of every payment into a dedicated account the day it arrives. Do not wait until the return is due to find out whether the money is there.
- Missing the $60,000 threshold, Many business owners realise they crossed it months after it happened. Check your rolling 12-month turnover regularly, not just at the end of the financial year.
- Claiming personal expenses, A dinner with your spouse is not a business meal. Claiming personal costs is an audit risk, and Inland Revenue does look at this.
- No tax invoice to back up the claim, You cannot claim what you cannot document. If a supplier does not send a proper tax invoice, ask for one before you pay.
- Forgetting to update prices after registration, If you were charging $100 and now need to add GST, your price becomes $115. Charging the same $100 means you are paying the GST out of your own margin.
- Filing late because you cannot pay, File on time regardless. The penalty for not filing is separate from the penalty for not paying. Inland Revenue also offers payment plans, but only if you contact them before the due date, not after you have already missed it.
GST catches a lot of good businesses off guard, usually not because the rules are complicated, but because nobody explained them clearly from the start. If you are setting up for the first time or trying to sort out a backlog of unfiled returns, Prudential Accounting and Taxation helps small businesses across New Zealand get on top of their GST obligations and keep them there. Get in touch before your next return is due.
FAQs
Q1. Do I charge GST to customers who are based overseas?
Usually not. Exported goods are zero-rated, meaning you charge 0% GST. Services provided to overseas customers are also generally zero-rated, though it depends on whether the service is consumed in New Zealand or overseas. Zero-rated does not mean exempt, you can still claim input GST on the costs of producing that work. If you have a mix of local and overseas clients, it is worth getting clear on the classification for each type of work.
Q2. What is the actual difference between zero-rated and exempt supplies?
Zero-rated means you charge 0% GST, but you remain in the GST system for those sales, so input GST on related expenses is still claimable. Exempt means the supply sits completely outside GST. You charge nothing, and you cannot claim input GST on related costs. Residential rental income and financial services are exempt. Exports are typically zero-rated. The distinction has real financial consequences, so if you are unsure which category your sales fall into, check with an accountant.
Q3. Can I register for GST before I have made any sales?
Yes. Inland Revenue allows registration before trading begins, provided you have a genuine intention to carry on a taxable activity. This is useful if you are spending significant money setting up, fit-out, equipment, stock, professional fees, because all that input GST becomes claimable from the date of registration. Just make sure the business actually gets off the ground, because Inland Revenue will expect to see taxable sales within a reasonable timeframe.
Q4. What happens if I have not registered, and I should have?
Inland Revenue can identify unregistered businesses through various data sources, including industry income benchmarks and third-party reporting. If they determine you should have been registered from an earlier date, they can back-charge GST on your sales from that point, plus use-of-money interest and potentially penalties. Voluntary disclosure, coming forward before they contact you, significantly reduces the penalty exposure. If you think you may have missed the registration threshold, deal with it proactively.
