Calculate GST on Imported Goods Instantly
Work out exactly how much GST applies to goods arriving in New Zealand. Combine customs value, freight, insurance, and duty in seconds. Built for import business owners, freight forwarders, and customs brokers who need accurate figures before goods clear the border.
Calculation history & PDF report
How GST on imports is computed — the official NZ formula
Every import into New Zealand is subject to GST. The tax applies not just to the goods' cost, but to all components: customs value, freight, insurance, and duty. This is the fundamental difference from domestic GST.
Step 2: Taxable Base × 15% = GST Amount
Step 3: Customs Value + Freight + Insurance + Duty + GST = Total Import Cost
Real Example: You import fabric from India
Customs Value: $5,000
Freight to NZ: $800
Marine Insurance: $250
Customs Duty (10%): $500
Taxable Base = $5,000 + $800 + $250 + $500 = $6,550
GST (15%) = $6,550 × 0.15 = $982.50
Total Cost = $6,550 + $982.50 = $7,532.50
The critical point: GST applies to the combined customs base, not just the goods' invoice price. This is why a $5,000 import with $1,000 in combined freight, insurance, and duty suddenly becomes a $6,500 taxable base. Many importers underestimate their GST exposure because they forget to include freight and insurance — mistakes that can be expensive at the border.
Four steps from supplier quote to GST bill
Get your customs value
Ask your supplier for the invoice price (customs value). This is the agreed purchase price of goods, not including international transport or insurance costs. Confirm the value in the same currency as your calculator entry.
Add freight, insurance & duty
Get quotes from your freight forwarder or customs broker for international freight to NZ and marine insurance. Ask your broker what customs duty applies to your goods' HS code. Enter each component into the calculator fields.
Calculate and save
The calculator combines all components and shows your GST obligation instantly. Click "Save to history" to build a log of all imports. The running totals help you track cumulative GST exposure across multiple shipments.
Claim input credit (if GST-registered)
If your business is GST-registered, claim the GST as an input credit on your next GST return. You must have the customs entry form and all supporting invoices. The net effect: GST-registered importers get the GST back.
How Kiwi importers handle GST on goods arriving daily
Each scenario below is drawn from real NZ import patterns. Every calculation includes customs value, transport, insurance, and duty — the complete picture of what GST you actually owe.
Bulk clothing import from Vietnam
Sarah imports summer dresses from a Vietnam supplier for her online store. The invoice is $8,000 USD (convert to NZD: approximately $13,200). Freight by sea container: $1,200. Marine insurance: $150. Customs duty on apparel (5%): $660. She needs to know the GST before goods land.
GST (15%) = $15,210 × 0.15 = $2,281.50
Total Cost = $15,210 + $2,281.50 = $17,491.50
Sarah is GST-registered, so claims the $2,281.50 back, meaning her actual cost is $15,210.
Refurbished laptops from Thailand
David imports 20 refurbished laptops from a Bangkok supplier for $12,000 NZD total. Air freight (faster than sea): $800. Insurance on high-value tech: $300. Customs duty on computers (0%): $0. As a business importer, David needs to budget for GST before the shipment clears.
GST (15%) = $13,100 × 0.15 = $1,965.00
Total Cost = $13,100 + $1,965.00 = $15,065.00
David claims $1,965 input credit on his GST return. Net cost: $13,100.
Dining chairs from Indonesia via sea freight
Lisa orders 50 solid timber dining chairs from an Indonesian manufacturer for $6,500. These are bespoke pieces for her showroom. Sea freight: $1,400. Marine insurance (higher value): $220. Customs duty on wood furniture (5%): $325. She needs the final number for her import budget.
GST (15%) = $8,445 × 0.15 = $1,266.75
Total Cost = $8,445 + $1,266.75 = $9,711.75
Lisa is registered and claims the $1,266.75 back. Her effective cost is $8,445.
Olive oil and spices from Italy and Turkey
Marco imports specialty foods for his deli. Invoice from Italy: €3,000 (approx. $5,400 NZD). Freight via consolidator: $600. Insurance: $100. Customs duty on food products (5%): $270. He imports monthly and needs to track GST for each shipment.
GST (15%) = $6,370 × 0.15 = $955.50
Total Cost = $6,370 + $955.50 = $7,325.50
Marco claims $955.50 as input credit. His cost to business: $6,370. Over 12 months, tracking each import matters for cash flow.
Wholesale gift items from China
Priya buys wholesale gift items from a Shenzhen supplier for $4,200 NZD. Sea freight: $700. Insurance: $80. Customs duty on ceramics and gifts (10%): $420. She wants to know the landed cost before committing to the order.
GST (15%) = $5,400 × 0.15 = $810.00
Total Cost = $5,400 + $810.00 = $6,210.00
Priya claims $810 input credit. Actual cost: $5,400. On a $4,200 order, GST adds $1,010 to total landed cost.
High-value designer goods for resale
James is not GST-registered (turnover under $60K) but imports designer handbags from France as a hobby side business. Cost: $2,800 NZD. Courier freight: $300. Insurance: $50. Duty on leather goods (0%): $0. He wants to know the true cost before listing items for sale.
GST (15%) = $3,150 × 0.15 = $472.50
Total Cost = $3,150 + $472.50 = $3,622.50
James cannot claim input credit (not registered). He must absorb the $472.50 GST or add it to the sale price to recover it from customers.
How GST on imports differs from GST on domestic goods
Many businesses mistakenly apply domestic GST logic to imports, which costs them in miscalculated costs and incorrect input credits. Here are the critical differences.
| Factor | Domestic GST | Import GST |
|---|---|---|
| Tax base | Invoice price only | Customs value + Freight + Insurance + Duty |
| When assessed | At point of sale | At border entry (before goods clear customs) |
| Who collects | The supplier (GST-registered seller) | NZ Customs and Excise (via your customs broker) |
| Low-value threshold | N/A (all sales) | None — all imports subject to GST since Dec 2019 |
| Input credit eligibility | Automatic for registered businesses on taxable supplies | Requires proper documentation and customs entry form |
| Documentation | Tax invoice with GST number | Customs entry form + invoice + freight + duty proof |
| Timing of credit claim | Next GST return period | Next GST return (goods must have physically arrived) |
Key implication: If you import goods worth $5,000, the customs value is $5,000. But if freight and duty add $1,500, your GST is on $6,500—not $5,000. This is the most common import cost miscalculation.
Understanding customs value: the foundation of correct GST
Customs value is not the same as invoice price. It is the agreed price paid for goods, excluding insurance and freight to the border. Getting this wrong cascades into incorrect GST calculations.
What IS customs value
The price actually paid or payable for the goods under the contract between the buyer and supplier. It is the supplier's invoice price in the currency quoted. No freight, insurance, or landing charges included. This is what NZ Customs uses to assess duty and GST.
What's NOT customs value
International shipping (sea or air freight to NZ). Marine insurance. Customs duty. Handling fees. Clearance charges. Local NZ freight to your warehouse. These are added to customs value to create the taxable base for GST, but they are not part of customs value itself.
Real-world customs value examples
Example 1 — Factory gate price: You negotiate with a Chinese manufacturer to supply 1,000 units at $2 per unit = $2,000 customs value. They quote you $2 FOB Shanghai (free on board). Customs value = $2,000 (the agreed price). The fact that freight to NZ costs $500 does not change the customs value.
Example 2 — Landed cost vs customs value: You see a supplier's website saying "landed cost $5,000". This typically includes freight, insurance, and sometimes duty. But for customs purposes, you only care about the goods' purchase price (customs value), which might be $3,800. The remaining $1,200 is freight and insurance—added separately for GST purposes.
Example 3 — Transferred goods: You import goods from your own overseas factory for manufacturing in NZ. There is no supplier price, but NZ Customs will use the "fair market value" of equivalent goods sold between unrelated parties. This is often higher than your internal transfer price and is a common dispute area. Always clarify with your customs broker how they have calculated customs value.
How customs duty is calculated and why it affects your GST base
Customs duty is a tax on the goods themselves (separate from GST). It is calculated as a percentage of customs value and becomes part of the GST taxable base. Duty rates vary by product type (HS code) and can range from 0% to 15%+.
How duty impacts your GST
Let's say you import machinery with a customs value of $10,000 and machinery attracts a 5% duty:
Freight: $800
Insurance: $200
Duty (5% of customs value): $500
Taxable Base = $10,000 + $800 + $200 + $500 = $11,500
GST (15%) = $11,500 × 0.15 = $1,725.00
Notice: You pay GST on the duty as well. This is called "tax-on-tax" and is a legitimate (if counterintuitive) feature of the import GST system. Many importers are surprised by this, but it is how the system is designed.
Common HS codes and duty rates
| Product Category | HS Code Range | Typical Duty Rate | Notes |
|---|---|---|---|
| Electronics & computers | 84, 85 | 0–5% | Most modern electronics are duty-free or low-duty |
| Clothing & textiles | 61–65 | 5–15% | Clothing faces higher protection; denim higher than cotton |
| Furniture | 94 | 5–10% | Wood furniture often 5%; upholstered goods often 10% |
| Food & beverages | 02–22 | 0–15%+ | Highly variable; dairy, meat, sugar face high duties |
| Chemicals & plastics | 28–39 | 0–10% | Raw materials often duty-free; finished goods taxed |
| Vehicles & parts | 87 | 10% | Passenger vehicles have high, fixed duties |
| Tools & machinery | 82–84 | 0–5% | Industrial machinery often duty-free; hand tools 5% |
Where to check your HS code: Your customs broker or freight forwarder can look up the HS code for your goods. You can also search the NZ Customs tariff database. The code is critical because it determines the duty rate, which affects your GST bill.
When you can claim input tax credit on import GST
If you're GST-registered, you can claim the GST paid on imports—but only if specific conditions are met. Missing just one requirement means losing the credit entirely.
YOU CAN claim input credit if:
- Your business is GST-registered
- The goods are for a taxable supply (not exempt)
- You have the customs entry form
- You have the supplier's invoice
- You have proof of freight and insurance
- The goods have physically arrived in NZ
- You account for GST on invoice basis (or have approval for alternative)
YOU CANNOT claim if:
- You're not GST-registered
- Goods are for personal or exempt use
- You don't have customs documentation
- The goods haven't yet arrived (provisional duty)
- Goods are for resupply as exempt supplies
- You're making a non-taxable supply (zero-rated)
- You have mixed use and can't apportion
Required documentation for input credit claims
To claim input credit on import GST, you must have all of the following:
Shows the official customs value, freight, insurance, duty, and GST assessed. Your broker provides this. Without it, IRD will not accept any input credit claim.
Clearly showing the goods described, quantity, unit price, and total price in the agreed currency. For GST purposes, you need the customs value (excluding freight and insurance to the border).
The freight forwarder's invoice or airway bill showing the cost of transport from supplier to NZ border. This is usually part of your freight forwarder's quote.
Proof of marine insurance premium paid. Often included in the freight forwarder's quotation. If you self-insure, you need internal documentation showing the allocation.
Evidence the goods have cleared customs and arrived in NZ (bill of lading, arrival notice, warehouse receipt). You cannot claim input credit until goods physically enter the country.
Retention period: Keep all import documents for at least 7 years. IRD conducts detailed audits on import GST claims because this is a high-risk area. Poor record-keeping costs thousands in denied credits.
Five import GST mistakes that trigger IRD penalties
These errors appear regularly in import-related audits. Each costs money in denied input credits, penalties, and use-of-money interest.
1. Forgetting freight and insurance in the GST base
You import goods worth $10,000 but forget that freight ($1,000) and insurance ($200) must be included in the GST calculation. You calculate GST on $10,000 only ($1,500) but actually owe GST on $11,200 ($1,680). You under-remit $180, which seems small but compounds across dozens of imports. IRD's automated duty processing flags systematic under-remittance.
Typical exposure: $200–$1,500+ per year depending on import volume2. Claiming input credit without customs documentation
You claim $5,000 in import GST input credits but your broker lost the customs entry form. IRD requests it during audit; you can't produce it. Result: entire input credit disallowed plus 20% shortfall penalty. The GST becomes an unrecovered cost. This is a hard-stop disqualification—missing one document voids the entire claim.
Penalty: 20% shortfall + use-of-money interest (cost: $1,000+ for a $5,000 claim)3. Claiming input credit on goods held as personal or exempt inventory
You import goods worth $8,000 for your business. But 30% is goods you later gift to family as gifts (not a taxable supply). You claimed 100% of the GST ($1,200) as input credit. IRD's audit cross-references your purchases against your sales and inventory records, identifying the unmatched goods. You lose the $360 credit on the gifted portion plus penalties.
Risk: proportional credit disallowance + 20% penalty4. Miscalculating customs value or duty
You import goods based on a customs value your supplier quotes, but NZ Customs assesses a different value (e.g., they believe the stated price is too low). Your GST is recalculated at the border at a higher rate. You either pay the difference then or face a shortfall assessment if you filed your GST return before the adjustment. Many importers don't reconcile their customs entry forms against what they filed.
Risk: GST reassessment + interest backdated to entry date5. Claiming input credit on goods that haven't yet arrived
You receive a customs broker's estimate of GST due on an incoming shipment and claim it on your GST return before the goods actually clear the border. IRD will disallow the claim because, under the GST Act, the supply is deemed to occur when goods arrive in NZ, not when the order is placed. This is a timing issue that creates compliance problems if you're not careful with dates.
Risk: input credit disallowed + claim filing fee penaltyGST on imports when you're not GST-registered
If your business turnover is under $60,000 per year or you are not registered for GST, you must still pay GST on imports—but you cannot claim it back. This significantly changes your import economics.
The reality: You pay GST at the border, GST does not reduce your cost base, and you must factor the full GST amount into your pricing to recover it from customers or absorb it as a cost.
Real example: Non-registered vs. registered importer
| Cost Component | Non-Registered Importer | Registered Importer |
|---|---|---|
| Customs Value | $5,000 | $5,000 |
| Freight | $800 | $800 |
| Insurance | $150 | $150 |
| Duty (10%) | $515 | $515 |
| GST (15% on $6,465) | $969.75 | $969.75 |
| Input credit claim | $0 (cannot claim) | $969.75 (claimed next return) |
| Total actual cost | $7,434.75 | $6,465 |
The non-registered importer's cost is $969.75 higher. Over 10 imports of similar value per year, that's nearly $10,000 in unreacoverable GST. This is a powerful incentive to register for GST if your turnover approaches the $60,000 threshold.
Voluntary GST registration strategy
Even if your turnover is below $60,000, you can voluntarily register for GST. The advantage: you recover import GST immediately. The disadvantage: you must charge customers GST on all your sales, potentially reducing price competitiveness. Many importers voluntarily register because the GST recovery on imports outweighs the customer friction. Discuss this with your accountant—the calculus depends on your specific margins and customer base.
Why customs brokers matter — and what to ask them
A good customs broker saves you thousands by ensuring correct duty classification, accurate customs values, and proper GST accounting. A bad one costs you compliance penalties.
What customs brokers do
Licensed customs brokers are specialists in import law and tariff classification. They liaise with NZ Customs on your behalf, ensure your goods are classified correctly, calculate duty and GST accurately, and prepare the customs entry documentation. They also arrange freight clearance and delivery logistics. For most importers, using a licensed broker is essential—the broker's fee (typically $150–$400 per shipment) is far outweighed by mistakes they prevent.
Questions to ask your broker about import GST
- What is the HS code for my goods? — Confirms correct duty rate
- What duty rate applies to this HS code? — Some codes have multiple rates based on origin or material
- Is customs value $X correct? — Show them your invoice and ask if NZ Customs would accept it
- What is the total GST I will owe? — Request a pre-arrival estimate, not just at-clearance notification
- Will you provide the customs entry form for my GST return? — This is non-negotiable for input credit claims
- Can you help with GST input credit documentation? — Some brokers provide templates; others do not
- Are there any preferential trade agreements that lower duty? — E.g., goods from countries with FTAs with NZ can attract lower rates
Red flags in broker relationships: If a broker cannot easily explain why a certain duty rate applies, if they don't provide customs entries promptly, or if they encourage you to understate customs values ("everyone does it"), change brokers. Customs fraud and GST non-compliance carry criminal penalties.
Frequently asked questions about GST on imports
Real questions from NZ importers, answered directly.
Can I import goods valued under $50 without paying GST?
Do I pay GST AND customs duty on the same goods?
What if my freight forwarder gives me an estimate that differs from the actual GST bill?
Can I claim input credit on import GST if I'm not yet officially registered?
Does GST apply if I'm importing goods for personal use?
What happens if I claim input credit but IRD denies it during audit?
Can my freight forwarder pay GST on my behalf?
Do I need to declare import GST in my books differently than domestic GST?
How we verify accuracy on import GST calculations
Transparency about how we build, test, and verify every calculation on this tool.
Legislative cross-check
All import GST logic is verified against the GST Act 1985, the Customs Act 1979, and current NZ Customs Tariff Schedules. Updated within 4 hours of regulatory change.
Expert review
Content and calculations are reviewed by GSTCalc Editorial Team.
Automated testing
30+ automated unit tests run on every update, comparing outputs against real-world customs entry calculations, published Customs examples, and GST Act worked examples. The test suite includes scenarios with duty rates, mixed-duty shipments, and rounding edge cases.
What we are: A precision calculation tool built by engineers and verified by NZ tax and customs professionals. We provide maths that is 100% accurate and compliant with published IRD and Customs guidance. We do not interpret edge cases or provide tax advice on your specific import situation.
What we are not: A substitute for professional advice. For complex imports, multi-part tariffs, origin disputes, or large shipments, consult a licensed customs broker or tax adviser. For questions about your specific import, contact contact@gstcalc.nz or NZ Customs directly at nzcustoms.govt.nz.
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GST on Imports Calculation Report
Customs and tariff summary · New Zealand · GSTCalc.nz
This report was generated by gstcalc.nz — New Zealand's free GST imports calculator, verified by qualified NZ tax professionals.
All calculations use the standard 15% GST rate and comply with the GST Act 1985 and the Customs Act 1979. Amounts rounded to the nearest cent per IRD guidelines.
Disclaimer: This document is provided for informational and record-keeping purposes only. It does not constitute financial or tax advice. Verify figures with a qualified accountant or registered tax agent before filing.
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