Proforma invoicing

Definition

Proforma invoicing is the process of issuing a preliminary invoice to a buyer before goods or services are delivered. A proforma invoice outlines the expected costs, terms and transaction details, but it is not a formal demand for payment or an accounting document.

What it means

A proforma invoice acts as a quote or estimate that gives the buyer clarity on pricing, quantities, taxes, shipping costs and payment terms before the transaction is completed. Businesses often use proforma invoices in international trade, custom orders and situations where advance approval or payment is required.

Unlike a standard invoice, a proforma invoice does not create a legal payment obligation or appear in official accounting records.

What a proforma invoice typically includes

• Description of goods or services
• Estimated prices and totals
• Shipping and delivery information
• Payment terms
• Expected transaction dates

Example

A UK manufacturer supplying machinery overseas may send a proforma invoice showing:

• Product cost: £50,000
• Shipping fees: £2,000
• Estimated taxes and duties
• Payment terms require a 30% deposit before production begins

The buyer can review and approve the details before the final invoice is issued.

Why proforma invoicing matters

• Provides transparency before a sale is finalised
• Helps buyers secure financing or import approvals
• Reduces misunderstandings around pricing and terms
• Commonly used in international and business-to-business transactions

Important to note

A proforma invoice is not the same as a commercial invoice. It is an estimated document only and may change before the final transaction is completed.

In short, proforma invoicing helps businesses communicate expected transaction details clearly before goods or services are officially supplied.