A Commercial Invoice is a document issued by the seller that confirms an international sale of goods between seller and buyer, and serves as the basis for payment, customs declaration, and calculation of import-export duty. It is one of the mandatory documents in an export-import dossier and is indispensable in the customs clearance process.

Many newcomers to import-export are still unclear on how a Commercial Invoice differs from a Proforma Invoice, which details must appear on the invoice, or the common mistakes that cause delayed clearance. The article below sets out the full concept, mandatory content, a standard commercial invoice template, the preparation process, and common errors when declaring a Commercial Invoice.

1. What Is a Commercial Invoice? Its Role in Import-Export

A Commercial Invoice, abbreviated CI, is the primary document used for payment, customs declaration, calculating import-export duty, and verifying the value of goods for insurance claims.

1.1 The Concept of a Commercial Invoice

A commercial invoice is a document prepared by the seller (Seller/Exporter) and sent to the buyer (Buyer/Importer) right after both parties have finalized the agreement on quantity, unit price, and transaction terms, formally confirming that the international sale of goods has been completed.

Commercial Invoice: What It Is & Full A-Z Guide

1.2 The Role of a Commercial Invoice for Each Party

A Commercial Invoice serves 3 main roles at once, supporting trade, customs, and insurance activities.

  • In trade: it is the legal basis for the buyer to make payment to the seller according to the agreed method and deadline.
  • In customs: it is a mandatory document for declaring customs value, calculating import duty, and cross-checking against the Packing List and Bill of Lading during clearance.
  • In insurance: it is the basis for determining the value of the goods when an insurance claim arises during transport.

1.3 Distinguishing a Commercial Invoice from a Proforma Invoice

A Commercial Invoice is the official payment document, issued only after both parties have finalized the agreement, while a Proforma Invoice is merely a preliminary quotation with no legal value for payment.

CriteriaCommercial InvoiceProforma Invoice
NatureOfficial commercial invoice with legal valueA courtesy invoice, draft/preliminary quotation
Time of issuanceAfter both parties have finalized the sales agreementBefore or during transaction negotiation
Legal valueValid for payment and as a basis for customs declarationNo payment value; for reference only
Purpose of usePayment, customs declaration, tax calculationQuotation, applying for an import license, opening a preliminary L/C

2. Mandatory Content on a Commercial Invoice

A valid Commercial Invoice must fully display party information, document information, goods details, trade terms, and shipping information to ensure it is accepted during customs declaration.

2.1 Information on the Parties Involved (Shipper, Consignee, Notify Party)

  • Shipper/Exporter: company name, address, phone number, email, representative.
  • Consignee/Importer: company name, address, contact details, bank account number (if paying via bank transfer).
  • Notify Party: the name and address of the party to be notified when the goods arrive, which may be the same as or different from the Consignee.

2.2 Document Information (Invoice Number and Date)

  • Invoice Number: a unique invoice number to identify the document.
  • Invoice Date: the date the invoice is prepared, which must be consistent with the actual delivery date and the Bill of Lading date.
  • Customer Reference Number: the related contract or purchase order reference number (if any).

2.3 Goods Details (Description, Quantity, Unit Price, Total Amount)

  • Description of goods: product name, grade/quality, model code, HS Code.
  • Quantity: clearly state the unit of measurement (kg, pieces, cubic meters, etc.).
  • Unit Price: the price per unit of goods.
  • Total Price: quantity multiplied by unit price for each line item, plus the total invoice value (in figures and in words).

2.4 International Trade Terms (Incoterms) and Payment Method

  • Incoterms: clearly state the delivery term under the current Incoterms rules (e.g. FOB Cat Lai Port, Vietnam; CIF Los Angeles, USA) along with the specific location.
  • Terms of Payment: T/T bank transfer, letter of credit (L/C), documentary collection D/A or D/P.

2.5 Shipping Information (Vessel Name, Voyage Number, Port of Loading/Discharge)

  • Mode of transport: sea, air, or road.
  • Vessel/flight name and voyage/flight number: must match the information on the Bill of Lading.
  • Port of Loading and Port of Discharge: must match the Bill of Lading/Airway Bill.
  • Bill of Lading or Airway Bill number.

Note: Under Article 9 and Clause 3, Article 13 of Decree 123/2020/ND-CP, the invoicing date for export goods is determined as the date the customs authority confirms clearance; under Clause 13, Article 10 of the same Decree, if the transaction is in foreign currency, the unit price, line amount, and total payment amount must be recorded in that foreign currency.

3. Standard Commercial Invoice Template

A standard international Commercial Invoice template should display 10 sections in full: seller information, buyer information, invoice details, transaction terms, shipping information, description of goods with unit price, additional costs, total value, declaration and signature, and notes.

Commercial Invoice

4. Guide to the Process of Preparing and Declaring a Commercial Invoice

Preparing a Commercial Invoice should follow a sequence from party information, goods details, and transaction terms to any additional costs, ensuring an exact match with the Packing List and Bill of Lading before customs declaration.

4.1 Step-by-Step Guide for Beginners

  1. Fill in seller and buyer information: full and accurate company name, address, and contact details as stated in the contract.
  2. Fill in the invoice number and date: ensure the issue date is reasonable relative to the actual delivery date.
  3. Fill in the trade terms and payment method: clearly state the Incoterms and Terms of Payment agreed in the contract.
  4. Fill in the goods details: description, HS code, quantity, unit price, and amount for each line item.
  5. Fill in the shipping information: mode of transport, Bill of Lading number, port of loading/discharge.
  6. Sign for confirmation: an authorized person signs and states their title, certifying that the declared information is accurate.

4.2 How to Show Discounts and Additional Costs (Freight/Insurance)

  • Discount: shown as a separate line, deducted directly from the total invoice value, or stated as a rate/amount per product, so the customs authority can easily reconcile the dutiable value.
  • Freight (international shipping cost): if not included in the goods price (under Incoterms group F such as FOB, FCA), this should be shown as a separate cost line to be added to the dutiable value on import.
  • Insurance: similar to freight, this should be shown separately if Incoterms group C applies, such as CIF or CIP, to correctly calculate the CIF value used as the basis for import duty.

Real-world example: For a shipment exported under FOB terms where the buyer asks the seller to advance the freight and insurance cost, the documentation officer should show these two items as separate “Freight” and “Insurance” lines on the Commercial Invoice, instead of folding them into the unit price of the goods, to avoid the customs authority suspecting an incorrect value declaration.

5. 4 Common Commercial Invoice Mistakes in Customs Declaration

The most common mistakes when preparing and declaring a Commercial Invoice are discrepancies between documents, an incorrect issue date, missing Incoterms, and lumping values together in a way that raises suspicion during customs valuation.

Common MistakeConsequenceHow to Fix It
5.1 Discrepancy between the Invoice, Packing List, and B/LPushed into the yellow/red channel, extending physical inspection timeCross-check quantity, weight, and goods description across all three documents before declaring
5.2 Invoice issue date later than the B/L DateRaises doubts about the validity of the transaction, may require an explanationPrepare and issue the Invoice before or on the same date as the B/L Date
5.3 Missing Incoterms or payment currencyInsufficient basis to determine the dutiable value, declaration requires supplementationClearly state the Incoterms with the specific location and the payment currency on every invoice
5.4 Lumping values together, raising customs valuation concernsSuspected of misdeclaring value, may lead to a reassessed import dutyShow freight, insurance, and discount as separate, transparent lines instead of folding them into the goods’ unit price

Real-world example: An importer was asked by the local Customs Sub-Department to provide an explanation because the Commercial Invoice was dated nearly a week after the vessel’s sailing date on the Bill of Lading, causing the shipment to be held for additional inspection before clearance.

6. Frequently Asked Questions About the Commercial Invoice (FAQs)

Is a Commercial Invoice mandatory in the customs dossier?
Yes. A Commercial Invoice is a mandatory document for declaring customs value, calculating import duty, and cross-checking against other documents in the export-import dossier.

How does a Commercial Invoice differ from a Proforma Invoice?
A Commercial Invoice is the official invoice with payment and customs-declaration value, issued after both parties have agreed on the transaction; a Proforma Invoice is only a preliminary quotation with no legal value for payment.

Does a Commercial Invoice need the buyer’s signature?
Not necessarily. For an electronic Commercial Invoice, the foreign buyer’s signature is not required; only the signature and title of the seller’s authorized representative are needed to confirm the declared information.

What currency should be recorded on a Commercial Invoice?
Depending on the agreement between the two parties, a Commercial Invoice can be denominated in a foreign currency (USD, EUR, etc.) as stated in the contract.

Does a Commercial Invoice need to show the exporter’s tax code?
Under current guidance on export invoices, it is not mandatory to record the foreign buyer’s tax code on the corresponding export invoice.

Who is responsible for preparing the Commercial Invoice?
The seller (Seller/Exporter) prepares and issues the Commercial Invoice and is responsible for the accuracy of the declared goods information, value, and transaction terms.

Can an incorrect Commercial Invoice be corrected?
Yes, a Revised Invoice or a replacement invoice can be issued, but this must be done before registering the customs declaration to avoid affecting the clearance of the goods.

Does a Commercial Invoice need to show the HS Code?
It’s recommended. While not every Commercial Invoice template requires the HS code, including it helps the customs declaration and duty-calculation process go faster and more accurately.

3W Logistics – Supporting Import-Export Documentation

Preparing an accurate Commercial Invoice that matches the Packing List and Bill of Lading is a decisive factor in fast customs clearance. 3W Logistics works alongside import-export businesses to standardize documentation and minimize errors during customs declaration.

  • Experienced documentation team: Reviews and cross-checks the Commercial Invoice against the Packing List and Bill of Lading before declaration, reducing the risk of yellow/red channel classification.
  • Incoterms and payment method consulting: Helps businesses choose and correctly show the transaction terms on the commercial invoice.
  • Template standardization support: Provides a standard, easily editable Commercial Invoice template for each type of export-import transaction.

Businesses needing consulting on the Commercial Invoice and other export-import documents, please contact 3W Logistics directly for support.

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