How to Prepare a Proforma Invoice
Note: This article is general information. Requirements vary by country, bank, and transaction; confirm specific requirements with your buyer, bank, or customs broker.
A buyer asks for a quote, then asks for it on a proforma invoice. The bank wants a proforma to process an advance payment. The importer needs one to apply for an import licence or to open a letter of credit. A proforma invoice is a simple document, but in export trade it often becomes the reference point for the whole transaction. Prices, quantities, delivery terms, and product descriptions defined in the proforma are carried into the contract, the letter of credit, and eventually the commercial invoice. Getting it right at the start prevents costly corrections later.
What Is a Proforma Invoice?
A proforma invoice is a preliminary document that sets out the details of a proposed sale before the goods are shipped. It is essentially a formal quotation in invoice form. It is not a tax invoice: it does not record a completed sale, it is not entered in the seller's accounts as revenue, and it does not create a payment obligation on its own. Once the buyer accepts it, the proforma often becomes the basis of the order or sales contract.
Where a Proforma Invoice Is Used
- Quotations: giving the buyer a clear, formal offer with prices and terms.
- Advance payments: allowing the buyer to arrange payment before production or shipment.
- Letters of credit: providing the details the buyer's bank uses to issue the credit.
- Import licences and permits: supporting the buyer's application to local authorities.
- Customs preparation: in some countries, supporting pre-clearance or valuation procedures.
- Internal approvals: helping the buyer obtain budget or purchase approval.
What to Include in a Proforma Invoice
- The words "Proforma Invoice", a unique number, the issue date, and a validity period
- Seller and buyer names, addresses, and contact details, plus tax or registration numbers where relevant
- A clear description of each product, with model or part numbers and, where relevant, HS codes
- Quantities, units, unit prices, and total value, with the currency stated clearly
- The Incoterms rule and named place, for example FOB Mersin or CIF Jebel Ali, with the Incoterms version
- Payment terms, such as advance payment, documentary collection, or letter of credit, and bank details
- Estimated production or shipment date and mode of transport
- Packaging details, estimated weights and volume, and country of origin
- Any conditions, such as price validity, minimum order quantities, or required certificates
Proforma Invoice vs Commercial Invoice
The commercial invoice is issued when the sale is completed, usually at shipment. It records the actual goods shipped, is used for customs clearance and accounting, and is a legal and tax document. The proforma comes earlier, is based on the planned transaction, and can be revised before acceptance. In practice, the commercial invoice should match the accepted proforma unless both parties agree to changes, and any differences should be explainable.
Common Proforma Invoice Mistakes
- Vague product descriptions: descriptions that do not match how goods will be described later on the commercial invoice and transport documents.
- Missing or unclear Incoterms: stating a term without a named place, or leaving out the version, which creates disputes about costs and risk.
- No validity period: prices that remain open indefinitely despite changing exchange rates or raw material costs.
- Unrealistic dates: shipment dates that production cannot meet, which then flow into a letter of credit.
- Uncontrolled revisions: several versions in circulation without clear numbering, so the buyer and bank work from different documents.
Managing Revisions and Letter of Credit Consistency
When a proforma is used to open a letter of credit, every detail matters. Descriptions, quantities, prices, Incoterms, shipment dates, and required documents in the credit are usually copied from the proforma. If the proforma is wrong, the credit will be wrong, and correcting a credit requires an amendment that takes time and costs money. Before sending a proforma that will be used for a letter of credit, check it against what your production, logistics, and document teams can actually deliver, and review the draft credit against the accepted proforma as soon as it arrives.
As order volumes grow, managing proformas in spreadsheets becomes risky. A system that generates proformas from product and price data, tracks versions and validity, converts accepted proformas into orders, and carries the same data into shipping documents and commercial invoices removes most of these errors.
Frequently Asked Questions
Is a proforma invoice a legal document?
A proforma invoice is not a tax invoice and does not record a completed sale. Once accepted by the buyer, however, it can form part of the agreement between the parties and is often relied on by banks and authorities.
Does a proforma invoice include VAT?
Export proformas typically show prices without domestic VAT, as exports are often zero-rated, but the treatment depends on the country and transaction. Domestic proformas may show the VAT that will apply. Confirm the correct treatment with your accountant.
Can a letter of credit be opened based on a proforma invoice?
Yes. Buyers commonly use an accepted proforma invoice as the basis for the details in a letter of credit, which is why the proforma must be accurate and realistic.
How long should a proforma invoice be valid?
There is no fixed rule. Many exporters set a validity of 15 to 30 days, or shorter when prices depend on volatile raw materials or exchange rates. The validity should always be stated on the document.
What is the difference between a proforma invoice and a commercial invoice?
A proforma invoice is issued before shipment as a formal offer based on the planned sale. A commercial invoice is issued at shipment for the goods actually sold and is used for customs, accounting, and tax purposes.
Conclusion
A proforma invoice may look like a simple quote, but in export trade it often defines the details of the entire transaction, from payment and letters of credit to the final commercial invoice. Include complete product, price, Incoterms, payment, and shipment details, state a validity period, control revisions, and check it against what you can deliver. We build export and order management systems for manufacturers and wholesalers that generate proformas, track their status, and carry the same data through orders, shipping documents, and invoices.