Proforma vs Commercial vs Customs Invoice: Which One Customs Wants

The three documents at a glance

The confusion is understandable: the three share a layout and often a template. What differs is when each exists in the deal and what it legally does.

	Proforma invoice	Commercial invoice	"Customs invoice"
When issued	Before the sale is closed (quotation stage)	When goods ship — the real sale	Same document as the commercial invoice
Purpose	Quote, import-license and L/C applications, advance-payment basis	Records the actual transaction; drives customs valuation and payment	Commercial invoice that meets customs data requirements
Legal / accounting effect	None — not a payment request, not booked	Binding sales record for both accounting and customs	(No separate document in U.S. practice)
Accepted at customs entry	Not as the entry invoice; sometimes for pre-checks, licenses, samples	Yes — this is the entry document	Yes (it is one)

In U.S. practice there is no separate "customs invoice" form anymore: CBP's regulations (19 CFR 141.86) define what a commercial invoice must show, and any commercial invoice carrying those elements is the customs invoice. The term survives because other countries still use dedicated forms — Canada's Canada Customs Invoice (CCI) is the one you will still actually meet; the old U.S. special customs invoice (Form 5523) is essentially history.

When customs asks for each

Formal entries: commercial invoice, always. For a consumption entry the importer's broker files the commercial invoice with the entry; it is the primary document CBP uses for valuation, origin and the duty computation. It must show the ten elements of 19 CFR 141.86 — buyer/seller, a full goods description, quantities, values and currency, origin, HTS codes, Incoterms and more. Our commercial invoice template walks through each field, and the invoice generator produces a compliant one in a couple of minutes.

Proforma invoices appear before entry, on the buyer's side of the fence:

• opening a letter of credit or arranging advance payment,
• applying for an import license or foreign-exchange allocation (common in some destination markets),
• estimating landed cost before ordering — which is where the tariff calculator comes in.

CBP itself does not clear a shipment "on a proforma". The narrow exceptions are informal entry situations and sample/fair-value declarations — and even there, CBP expects values that a real commercial invoice would later confirm.

"Customs invoice" requests are really data requests. When a freight forwarder emails asking for "the customs invoice", they mean: your commercial invoice, filled with the customs-required fields. Sending a bare sales receipt without HTS codes or origin is what triggers the classic "commercial invoice is incomplete" hold.

The proforma "no commercial value" case

Proformas are commonly stamped or titled "Proforma invoice — no commercial value". The phrase does two jobs and is worth understanding precisely:

1. It tells banks and accountants nothing is owed on this document. The proforma's number (often a PI- series) never enters either company's books; the commercial invoice's number does.
2. It prevents the quote being mistaken for a payment demand. Courier agents occasionally see proformas on sample shipments; the stamp keeps a $0 "value for customs" from turning into an odd duty assessment conversation — though for anything dutiable, CBP still wants a realistic fair value, not "$0".

If your samples genuinely have no sale behind them, you still declare a fair value for customs — samples are dutiable in the U.S. above the de minimis line like anything else. "No commercial value" describes the invoice, never the goods.

Which one your shipment needs

• Buying or selling cross-border (formal entry): one commercial invoice with full customs data — start from the template.
• Quoting, L/C, import license, advance payment: proforma invoice — it may later become the commercial invoice by filling in the real shipment details and swapping the stamp for signatures.
• Asked for a "customs invoice": send the compliant commercial invoice. For shipments into Canada, the buyer may specifically need the CCI.
• Checking what the goods will actually cost at entry: price the stack first with the tariff calculator — the duty lines belong on neither proforma surprises nor margin hopes. If the deal is DDP, read who pays tariffs under each Incoterm before you quote.