Commercial Invoice 101: How to Fill It Out Correctly

Every international shipment needs a commercial invoice. It's not optional, it's not a formality, and getting it wrong is one of the most common reasons packages get held at customs. A commercial invoice tells the destination country's customs authority what's in the package, what it's worth, where it came from, and who it's going to. Customs uses this information to determine how much duty and tax to charge, whether the goods are allowed into the country, and whether any special permits or inspections are required.

What a Commercial Invoice Contains

A commercial invoice looks like a regular business invoice with extra fields for customs purposes. The essential elements are the sender's name, address, and contact information; the recipient's name, address, and contact information; a detailed description of every item in the shipment; the HS code (Harmonized System code) for each item; the quantity and unit value of each item; the total declared value; the currency; the country of origin where the goods were manufactured; and the reason for export (sale, gift, sample, repair, etc.).

The item description is where most people cut corners and where most customs delays originate. "Clothing" isn't sufficient. "Men's cotton polo shirt, size L" is. "Electronics" will get your package flagged. "Wireless Bluetooth headphones, model XYZ, consumer electronics" clears smoothly. Customs officers process thousands of declarations per day and don't have time to open packages to figure out what vague descriptions mean. They'll either hold the package for inspection or send it back. Neither outcome is good for you or your customer.

The Fields That Matter Most

Declared value is the most scrutinized field on the commercial invoice. Under-declaring to help your customer avoid duty is illegal in virtually every country and the consequences are serious — fines, seizure of goods, and being flagged for enhanced inspection on all future shipments. The declared value should be the actual transaction price for sales, or the fair market value for gifts and samples.

Customs authorities routinely cross-reference declared values against known market prices for common product categories. If you declare a pair of branded sneakers at $15 when the retail price is $150, the inconsistency triggers a review. The package gets held, the customer gets a notice asking for proof of purchase, and the whole process adds days or weeks to delivery.

The HS code determines the duty rate, so accuracy directly affects how much your customer pays. A product classified under the wrong HS code might face a 15 percent duty rate when it should be 5 percent, or vice versa. Getting the code right saves your customer money and prevents disputes. If you're unsure about the correct HS code, look it up using your country's tariff database or consult a customs broker.

Country of origin means where the product was manufactured, not where you're shipping from. If you buy products from China, store them in a US warehouse, and ship them to the UK, the country of origin is China, not the United States. This matters because trade agreements, anti-dumping duties, and preferential tariff programs all depend on the actual origin of the goods.

Common Mistakes and How to Avoid Them

Listing a single line item for multiple different products is a frequent error. If your package contains three t-shirts and two phone cases, list them as separate line items with separate values and HS codes. Grouping everything as "assorted merchandise, $50" guarantees a customs delay.

Forgetting the invoice on the package itself is surprisingly common. Many countries require physical copies of the commercial invoice attached to the outside of the package in a clear adhesive envelope. Even when electronic submission is available, having the paper copy on the package speeds up clearance because the customs officer can review it without looking up the electronic record.

Using the wrong currency can cause confusion. State the currency clearly (USD, EUR, GBP) and be consistent across all fields on the invoice. If your product prices are in USD, your total should be in USD. Mixing currencies or using ambiguous symbols ($ could mean USD, CAD, or AUD) creates unnecessary back-and-forth with customs.

Omitting the reason for export seems minor but matters. "Sale" tells customs this is a commercial transaction subject to standard duty and tax. "Gift" may qualify for a different (usually lower or exempt) duty threshold in some countries. "Sample" or "repair" may be exempt from duty entirely. Using the wrong reason is misrepresentation; using the right reason ensures correct treatment.

Practical Tips

Create a commercial invoice template with all your company information pre-filled and use it for every international shipment. This ensures consistency and prevents the common mistake of forgetting required fields when you're rushing to ship.

Keep copies of every commercial invoice you generate, either digitally or on paper, for at least two years. If a customs dispute arises months after shipment, you'll need the original documentation to resolve it.

For high-volume international shipping, automated invoice generation through your shipping platform saves significant time and reduces errors. atoship generates commercial invoices automatically from your order data, populates HS codes from your product catalog, and attaches the documentation to the shipment — eliminating manual paperwork while ensuring every required field is complete and accurate.