What Is a Commercial Invoice in Shipping?

A commercial invoice is the seller's bill of sale for an international shipment, and it is the primary document customs uses to assess duty and confirm the declared value of the goods. It tells the importing country's customs authority who is buying, who is selling, what is being shipped, how it is classified, what it is worth, and under what terms of sale. Unlike a routine accounting invoice, a commercial invoice carries the specific fields customs needs to decide how much duty is owed and whether the shipment is admissible. Get those fields right and the goods clear; get them wrong and the shipment sits.

Key takeaways

• A commercial invoice is the seller's bill that customs uses to assess duty and verify the value of imported goods.
• Required fields include the buyer and seller, a clear goods description, the HTS classification, unit and total value, the Incoterm, and country of origin.
• It is not the same as a packing list (which counts and describes the physical cartons) or a proforma invoice (a pre-sale quote).
• Missing, vague, or inconsistent fields are a leading cause of customs holds, which add storage and demurrage cost.
• The seller prepares and signs it, but the importer of record is legally responsible for its accuracy.

What does a commercial invoice do at customs?

At customs, the commercial invoice is the document an officer reads to answer three questions: what are these goods, what are they worth, and what duty rate applies. Customs uses the declared transaction value as the basis for calculating duties and taxes, and it uses the goods description and classification to determine the correct rate and any admissibility rules. In the United States, U.S. Customs and Border Protection sets out what an entry must contain; see the guidance at U.S. Customs and Border Protection. Because the invoice drives the duty math and the release decision, it is the single most scrutinized document in most import files.

What information must a commercial invoice include?

A commercial invoice must identify the parties, the goods, and the terms clearly enough for customs to classify and value the shipment without guessing. Vague entries like "parts" or "gift" are the fastest way to draw a question. At minimum, include the following.

• Parties: the seller or exporter and the buyer or importer, with full legal names and addresses, plus the ship-to party if different.
• Goods description: a plain, specific description of each item, quantities, and units. Say what the thing actually is, not just a marketing name.
• HTS classification: the Harmonized Tariff Schedule code for each line, ideally the full 10-digit code the importing country uses, so customs and your broker classify it the same way.
• Value: unit price and extended line totals, the invoice total, and the currency. This is the transaction value customs uses to assess duty.
• Incoterm: the agreed term of sale, such as FOB, EXW, or DAP, which signals what is and is not included in the price. Our guide to Incoterms breaks down what each one shifts between buyer and seller.
• Country of origin: where each item was made, which drives the duty rate, trade-agreement eligibility, and any special tariffs.
• Reference details: invoice number and date, purchase order number, gross and net weight, number of packages, and any freight or insurance charges shown separately.

For a full document set that goes beyond the invoice alone, work from an import documents checklist so nothing gets filed short.

How is a commercial invoice different from a packing list and a proforma invoice?

The three documents look similar but do different jobs: the commercial invoice is the priced bill of sale customs values, the packing list describes the physical contents without prices, and the proforma invoice is a pre-sale quote issued before a deal is final. They travel together but customs relies on the commercial invoice for the duty calculation.

Feature	Commercial invoice	Packing list	Proforma invoice
Purpose	Bill of sale customs uses to assess duty and value	Details how the goods are packed and counted	Preliminary quote before a sale is confirmed
When issued	After the sale, shipped with the goods	After the sale, shipped with the goods	Before the sale, during quoting or ordering
Shows prices?	Yes, unit and total value	No prices, just quantities and packaging	Yes, but as an estimate, not a final charge
Used by customs to assess duty?	Yes, this is the valuation document	No, used to verify contents on inspection	Not for final clearance; may support a preliminary or temporary entry
Key fields	Parties, HTS, value, Incoterm, origin	Carton counts, weights, dimensions, contents per box	Estimated goods, quantities, and prices

Because the packing list and commercial invoice ship together, customs cross-checks them. If the invoice says 500 units and the packing list counts 480, expect a question before release.

Why do commercial invoice errors cause customs delays?

Errors cause delays because customs cannot value or classify a shipment it does not understand, so it holds the goods and asks for a correction. A hold does not just cost time. Once a container or shipment misses its free window, storage and demurrage charges start accruing, and the importer usually pays them even when the supplier made the mistake. The most common triggers are a vague goods description, a missing or wrong HTS code, an omitted country of origin, a value that does not match the payment records, and a missing Incoterm. Any one of them can turn a same-day release into a multi-day hold.

These are avoidable with a review step. Before goods ship, confirm the descriptions are specific, the classifications match what your broker expects, and the value ties out to the purchase order and the wire. The documents a broker actually needs to file a clean entry are covered in our guide on the documents a customs broker needs.

How do you fill out a commercial invoice correctly? A worked example

Fill it out so a customs officer who has never seen your product can classify and value it on the first read. Consider a US brand importing 500 stainless steel vacuum water bottles from a supplier in Vietnam at 3.20 dollars per unit, sold FOB Ho Chi Minh City.

• Seller and buyer: the Vietnamese manufacturer and the US company as importer of record, both with full legal addresses.
• Description: "Stainless steel double-wall vacuum insulated water bottles, 20 oz" rather than just "bottles."
• HTS classification: the 10-digit US code for vacuum flasks, matched to what the broker will file.
• Value: 500 units at 3.20 dollars equals a 1,600 dollar line total, shown in US dollars, with freight and insurance listed separately if the term requires it.
• Incoterm: FOB Ho Chi Minh City, so the buyer covers ocean freight and insurance from the origin port.
• Country of origin: Vietnam, which sets the duty rate and any applicable trade-remedy tariffs.

With the FOB value established, the importer can estimate duty and total delivered cost before the goods arrive; our landed cost calculator helps model duty, freight, and fees on top of the invoice value. If any field is uncertain, resolving it before the shipment sails is far cheaper than fixing it during a hold.

Who prepares the commercial invoice, and who is responsible for it?

The seller or exporter prepares and signs the commercial invoice because they hold the sale terms, the pricing, and the origin details, but the importer of record carries the legal responsibility for what is declared. That split is why importers should never treat the supplier's invoice as final without reading it. A licensed customs broker sits in the middle: they file the entry from the invoice, flag anything missing, and translate the goods into the correct classification. If you are still deciding who handles your customs work, compare providers on the customs brokerage directory, or read how a customs broker differs from a freight forwarder before you engage one. A clean, complete commercial invoice is the single best thing a shipper can hand a broker to get goods released without a hold.