Singapore Customs Declaration: A Complete Guide for Importers and Exporters
Updated: Oct 25
Updated 23 September 2026
A Singapore customs declaration is the permit application your business files through TradeNet each time goods cross the border. It tells Singapore Customs what the goods are, what they're worth, where they come from and which scheme they move under. Get those fields right and clearance is routine. Get them wrong and the cost shows up later, usually as a GST bill or an audit letter.
That second part is no longer theoretical. On 10 September 2026, Singapore Customs published an advisory after audits caught some traders repeatedly under-declaring what their seafood, fruit and vegetable imports were worth. The GST short-paid came to about $1.4 million over three years. Customs is now asking every trader to review past imports.
This guide is for Singapore importers and exporters who want their declarations to hold up to that kind of review. It covers who has to declare, which declaration fits which shipment, how the filing works, and the mistakes we see most.
KEY TAKEAWAYS
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In this article |
What is a Customs Declaration?
In Singapore, a customs declaration is a permit application submitted in TradeNet, the national single window for trade declarations run by Singapore Customs (what you need to know about TradeNet). One platform covers goods coming in and going out, plus those in transit. Whether your team calls it a custom declaration, a permit declaration or just "the permit", it's the same filing.
Once approved, the declaration becomes a permit, and it is the permit that lets goods move and GST be accounted for. Commercial imports generally need one, obtained before the goods arrive. Non-dutiable goods pay GST, and dutiable goods pay both duty and GST when they are imported for local consumption (import operations overview).
Think of it as the official record of the shipment. The invoice is your supplier's version of events. The declaration is yours, and it's the one Singapore Customs holds you to. That's why a declaration copied straight from a supplier's paperwork, without checking the value, the HS code or the origin, is the most common way businesses get into trouble.
Who Needs to Make a Customs Declaration?
Any business moving goods into, out of or through Singapore needs a declaration filed for them. The harder question is who counts as the importer, and who is allowed to file.
The importer. Singapore Customs is specific here. If a local company appears as consignee on the commercial invoice for goods it bought from an overseas seller, Customs treats that local company as the importer (import procedures overview). That matters for GST, because the importer named on the permit is the party that accounts for it.
The filer. Only declaring agents can submit a new declaration in TradeNet. A declaring agent files the application, through a qualified declarant, on behalf of the company that owns the goods. A business can appoint up to 20 declaring agents and change the list whenever its arrangements change (declaring agent authorisation).
The setup. Before any declaration, the business needs a UEN from ACRA or the relevant issuing agency, then an activated Customs Account (obtain a customs import permit). Only Key Personnel such as an owner, partner or director can activate that account. Activation is free, and Customs replies within four working hours, or within three working days if it asks for documents (Customs Account).
If you want to file yourself, you register as a declaring agent and get a TradeNet User ID. That route also means a GIRO arrangement with Customs, which banks typically take 3 to 4 weeks to approve, and a declarant who passes the SC 401 competency test (declaring agent account).
Types of Customs Declarations in Singapore
The shipment's direction and its tax treatment decide the declaration. There are three broad kinds, and each carries its own traps.
Import Declaration
Required before goods come into Singapore. The permit must be in place before the goods are imported, not after they land. It carries the value, quantity, HS code and origin, and it's where GST and any duty get assessed.
Imports for local use pay at the border. Goods moving into a scheme that suspends tax, such as a Zero-GST warehouse, use a different permit type. Our cargo clearance permit guide explains how the permit types split.
Export Declaration
Exports carry no duty or GST, which is exactly why businesses underrate them. The export permit still has to be obtained before export, and it has to state the Free on Board value and the country or region of origin accurately (export procedures overview).
Singapore Customs lists the exports that need one. Locally made or GST-paid goods are on it. So are goods leaving a free trade zone, goods under the Major Exporter Scheme, and re-exports of goods that entered on the Temporary Import Scheme.
The exemptions are narrow. Samples, test specimens and gifts up to S$400 in total can go without an export permit. So can air exports up to S$1,000. Neither applies to dutiable or controlled goods (permit exemptions).
Origin has a precise meaning too. Circular 06/2025 defines it as the country that produced the goods outright, or where they were last substantially changed. It is not the port they sailed from (Circular 06/2025). If your buyer also wants origin papers, see our guide on applying for a Certificate of Origin in Singapore.
Transshipment & Transit Declarations
Goods passing through Singapore pay no duty or GST on the transhipment itself. The catch is the definition. Movements that fall outside the transhipment scenarios Customs recognises count as imports or exports, and need those permits even when the goods never leave the free trade zone (transhipment operations). Our transhipment permit team checks which side of that line a movement falls on.
Step-by-Step Process of Filing a Singapore Customs Declaration
Before the first permit, Singapore Customs lists five things to set up, in order: switch on your Customs Account, confirm what the goods are and how they classify, sort out how you'll pay, put up security if it's needed, and only then apply (setup checklist). Here is how that plays out for each shipment.
Confirm the HS code. Every line needs its 8-digit code, because the code drives duty and controls. If you're unsure, Customs sells an official classification ruling at S$75 per product, valid for use within Singapore. Our HS code declaration guide covers when a ruling is worth it.
Check for controls. Goods under a Competent Authority need that authority's approval, and some products need two product codes declared together. Missing or partial codes can delay the permit or get it rejected.
Build the value. Customs value begins with CIF and adds all costs that come with selling and delivering the goods into Singapore.
Fill the product fields in full. Since Circular 09/2025, that means a clear goods description plus brand, model, supplier or manufacturer, end use and remarks where they apply.
File through TradeNet. The agent files through TradeNet front-end software, either a commercial package or the government's own front-end application.
Pay and clear. GST and any duty are paid, the permit is approved, and the goods can be cleared.
Keep the file. Hold the documents for at least 5 years.
Two of those steps deserve more than a line, because they are where most declarations go wrong.
Valuation. Singapore Customs uses the transaction value method as its primary basis, built on CIF terms, and every charge incidental to the sale and delivery must be added (establishing customs value). Foreign-currency costs convert at the weekly average MAS rate prevailing when duty is paid. If your supplier quotes FOB, freight and insurance still have to go into the import value.
Product information. Circular 09/2025 came out on 14 October 2025. Its message to traders and agents: declare the product in full (Circular 09/2025).
A shortened HS or Competent Authority description no longer passes as a goods description. Neither does a bare model number.
Small on paper, big in practice. Many permit templates were built on exactly those shortcuts.
Required Documents for Importers and Exporters
Your declaring agent can only declare what your documents support. Declaration Nexus works from this set, and Singapore Customs' own guidance says to hand over the full set rather than a summary:
The final commercial invoice. Customs says not to use pro-forma invoices for a permit application.
A packing list, with quantities and packing that match the invoice line by line.
The bill of lading or air waybill.
Freight and insurance charges, which build the CIF value on imports.
Any Competent Authority licence or approval, obtained before the permit is filed.
A Certificate of Origin, where a buyer or a trade agreement needs proof of origin.
Keep all of it. Both you and your agent hold every record of buying, importing, selling or exporting the goods for a minimum of 5 years after permit approval, and scans are fine (retaining trade documents). Some permits carry a Z02 condition: the permit, invoices and transport papers go back to Customs within 48 hours of approval. That one isn't optional.
Need help with a permit or customs clearance? Ask a Declaration Nexus declaring agent on WhatsApp. or call +65 6589 8122 · email enquiry@declarationnexus.com |
Common Mistakes to Avoid in Customs Declarations
Singapore Customs publishes its own list of what to do and what not to do (import procedures overview). These are the entries we see go wrong most often.
Leaving freight and insurance out of the value. Customs lists "insurance charges omitted" as a named example of an incorrect declaration.
Forgetting the extras. Samples, gifts and free-of-charge items all have to be declared, and at a real value, not a nominal one.
Using the port of loading as the origin. Goods made in one country and shipped from another take the country where they were made.
Short product descriptions. After Circular 09/2025, a copied HS heading or a bare model number is not enough.
Filing on unverified documents. Customs tells declarants to check that documents are authentic before declaring from them.
Letting a permit lapse. Most import permits are valid for the approval date plus 9 working days. Extend in TradeNet before expiry if the goods can't move in time.
The value mistakes matter more than ever. The September 2026 advisory on seafood, fruit and vegetable imports is the clearest signal yet that Customs uses targeted profiling and post-clearance audits on declared values (Circular 11/2026). If you import in those categories, review the last few years now, while the review is still your own.
How to fix a declaration that's already wrong
Errors are fixable, and the earlier you catch them, the more options you keep.
While a permit is still valid, you can amend it in TradeNet, and there's no cap on the number of amendments (amendment and cancellation). Where the value was wrong and too little tax was paid, you take up a Short-Payment permit for the shortfall. Paid too much? A refund request goes in through TradeNet with the reason.
Some permits can't be cancelled: those that have cleared cargo, those more than a calendar day past expiry, and those pulled for audit. For them, the route is a voluntary disclosure.
It has to be complete, and it has to come before Customs begins any check or audit. There's no fixed deadline. Incomplete submissions are rejected, and Customs processes complete ones within 3 working days (Voluntary Disclosure Programme).
Our view: if a review of past imports turns up a problem, disclose it. A complete, early disclosure is the one position you choose yourself.
Duties, Taxes, and Exemptions
Most goods never pay customs duty in Singapore. Only four kinds of goods carry it: liquor, tobacco, motor vehicles, and petroleum products including biodiesel blends (dutiable goods). Customs duty applies to imports, while excise duty applies to those goods whether made locally or imported.
GST, on the other hand, applies to virtually every import. The base is the customs value plus duties. If the goods changed hands more than once before they landed, and the last buyer files the permit, GST is worked out on that final price plus duties (GST on imports). IRAS sets the current rate at 9% (IRAS).
Three schemes change when that tax is paid, and each shows up in how you declare:
Major Exporter Scheme. Run by IRAS for businesses that re-export a large share of their imports. It suspends GST on non-dutiable imports and on goods leaving a Zero-GST warehouse, and uses an In-Non-Payment permit. Our Major Exporter Scheme page covers who qualifies.
Zero-GST Warehouse Scheme. Non-dutiable goods sit in licensed premises with GST suspended until they leave for local use.
Licensed Warehouse Scheme. The dutiable equivalent: duty and GST stay suspended until the goods leave for local consumption.
None of these remove the declaration. They change the permit type, and a wrong permit type undoes the benefit.
Doing it yourself or using a declaring agent
The permit fee itself is small. Singapore Customs puts a typical TradeNet permit application at about S$3.19, excluding any fees third parties charge (permit fees). What costs money is a wrong value, a lapsed permit or a missing licence.
Filing yourself means a Declaring Agent Account, a GIRO arrangement, a declarant who has passed SC 401, and someone watching every circular. That can make sense for a business filing daily on one stable product range. For most importers and exporters, a declaring agent who owns the declaration is the cheaper way to get it right.
Work with Declaration Nexus
Declaration Nexus is a Singapore customs broker and declaring agent. We prepare and file declarations in TradeNet for goods coming in, going out or passing through. We fill the product fields to the standard Circular 09/2025 now expects. Freight forwarders use us as an independent declaration partner when they would rather not own the paperwork.
Send us the invoice, packing list and HS codes for your next shipment through our contact page. We'll tell you where your Singapore customs declaration stands before anything is filed.
Need a declaring agent in Singapore?
Speak to a Declaration Nexus declaring agent about your next permit or clearance. Call: +65 6589 8122 WhatsApp: +65 8786 3987 Email: enquiry@declarationnexus.com Office: 60 Paya Lebar Road, Unit 07-54 Paya Lebar Square, Singapore 409051 |
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Frequently asked questions
What is a customs declaration in Singapore?
It's a permit application filed in TradeNet for goods coming into, leaving or passing through Singapore. It records what the goods are and what they're worth. HS code, origin and scheme go in too. Once Singapore Customs approves it, the permit covers the movement and the GST or duty owed.
Do I need a declaring agent to make a customs declaration?
Yes, someone must act as one. Only declaring agents can submit new declarations in TradeNet. You can appoint up to 20 agents, or register your own business as a declaring agent, which needs a TradeNet User ID, a GIRO arrangement with Customs and a declarant who has passed SC 401.
What value do I declare for GST on imports?
Start from the CIF value: cost, insurance and freight. Add all costs tied to selling and delivering the goods into Singapore, then any duty. GST at the prevailing rate, currently 9% per IRAS, applies to that total. Foreign-currency amounts convert at the weekly average MAS exchange rate.
What has changed in Singapore customs declarations recently?
Two things. Circular 09/2025 requires full product information, so abridged HS descriptions and bare model numbers no longer pass. And in September 2026, Circular 11/2026 flagged under-declared values on seafood, fruit and vegetable imports, urging traders to review past imports and disclose any GST short-paid.
Do exports need a customs declaration if no GST is charged?
Usually, yes. Exports carry no duty or GST, but most still need an export permit before they leave, declaring the FOB value and the origin. Small exemptions exist for low-value samples, gifts and air exports, but they don't apply to dutiable or controlled goods.
What happens if I declared the wrong value?
If too little tax was paid, you take up a Short-Payment permit for the difference. If you overpaid, you request a refund in TradeNet. Where the permit can no longer be amended or cancelled, the route is a complete voluntary disclosure, filed before Customs starts any check.
How long must I keep customs declaration records?
At least 5 years from the date the permit is approved, and the obligation sits with both the trader and the declaring agent. Scanned copies are accepted if they meet Singapore Customs' guidelines. Permits with a Z02 condition also need documents sent within 48 hours of approval.
This article summarises publicly available guidance from Singapore Customs and IRAS as at the date above. It is general information, not legal or tax advice. Confirm the treatment of your goods with Singapore Customs, or with us, before you file your next Singapore customs declaration.
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PUBLISHED BY Declaration Nexus Team Declaring agent and customs broker at Paya Lebar Square, Singapore |
Last updated 25 October 2026. Have a customs question? WhatsApp the Declaration Nexus team at +65 8786 3987. |
