A proforma invoice is a preliminary estimate sent to a buyer before a transaction is finalized. It looks like a regular invoice but does not request payment — it confirms what the buyer can expect to pay.

When Is a Proforma Invoice Used?

Proforma invoices are common in:

  • International trade — customs authorities often require a proforma invoice before goods are shipped so they can assess duties and taxes
  • Pre-sale agreements — sellers send one to confirm pricing, quantities, and terms before the buyer commits
  • Budget approvals — buyers use them internally to get purchase approval before placing an order
  • Advance payments — some sellers issue a proforma invoice so the buyer knows the exact amount to wire before production begins

Proforma Invoice vs Commercial Invoice

  • A proforma invoice is an estimate issued before delivery. It is not recorded as accounts receivable.
  • A commercial invoice is the final bill issued after delivery. It is a legal document used for customs, taxes, and payment collection.

Think of the proforma as the quote and the commercial invoice as the final bill.

What to Include

A proforma invoice typically contains:

  • The words "Proforma Invoice" at the top (so it is not confused with a final invoice)
  • Seller and buyer details
  • Description of goods or services
  • Quantities, unit prices, and totals
  • Estimated shipping and insurance costs (if applicable)
  • Delivery timeline
  • Payment terms
  • Validity period (e.g., "This proforma is valid for 30 days")

Example

An electronics manufacturer in Shenzhen sends a proforma invoice to a retailer in Sydney:

  • 500x Wireless Earbuds — $8.50/unit — $4,250.00
  • Shipping (air freight) — $380.00
  • Proforma Total: $4,630.00
  • Valid until: December 11, 2026

The Sydney retailer uses this proforma to get internal approval and arrange the bank transfer. Once payment is received, the manufacturer ships the goods and issues a commercial invoice.

Common Mistakes

  • Treating a proforma as a tax invoice. Proforma invoices are not valid for tax deductions or customs clearance — you need a commercial invoice for that.
  • Not labeling it clearly. Always write "Proforma Invoice" prominently so it is not mistaken for a final invoice.
  • Leaving out the validity period. Prices change — without an expiry date, a buyer could try to use an outdated proforma months later.
  • Including an invoice number from your main sequence. Proforma invoices should use a separate numbering system (e.g., PI-2026-001) to avoid confusion in your accounts.