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Commercial invoice vs proforma invoice

Last reviewed 2026-11-03 ยท Guidance, not tax or legal advice

Short answer: A proforma invoice is a preliminary quote sent before a sale is confirmed or shipped: it is not a demand for payment or a tax document. A commercial invoice is the final document for a completed sale, used by customs to value goods and assess duty. Exporters often send a proforma first, then a commercial invoice with the shipment.

Proforma invoiceCommercial invoice
PurposeQuote or estimate before the saleFinal bill for a completed sale
Legal or tax documentNoYes, for customs and accounting
Demand for paymentNo (may request an advance)Yes
Typical useAdvance payment, letters of credit, import licencesCustoms clearance, duty assessment
Can change laterYesOnly by credit note or a new invoice
Key extrasValidity dateHS codes, country of origin, Incoterms, declaration

Typical export flow

  1. Buyer asks for a quote: send a proforma invoice with a validity date.
  2. Buyer pays the advance or opens a letter of credit.
  3. Goods ship with a commercial invoice plus the packing list and transport document.

Read how to fill in a commercial invoice for each field.

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Frequently asked questions

Can a proforma invoice be used for customs?

Some customs authorities accept a proforma when there is no sale (for example samples or gifts), but most shipments need a commercial invoice. Check with your carrier.

Does a proforma invoice need a tax number?

It is not a tax document, but including your tax or VAT number helps buyers and banks.

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