Proforma Invoice vs Quote: When to Send Each Document

Short answer

A quote estimates the price before the customer agrees to buy. A proforma invoice shows expected invoice details before the final invoice is issued. Both can appear before payment, but they are used at different points in the sales workflow.

Use a quote when the customer is still deciding. Use a proforma invoice when the sale is more defined and the customer needs a formal preview of costs, taxes, shipping, or payment details.

You can create a proforma-style document with the proforma invoice generator and then issue a final invoice later when the sale is confirmed.

What a quote is for

A quote is an offer or estimate. It tells the customer what a product or service is expected to cost. Quotes are common for custom work, consulting, trade services, design projects, repairs, and larger purchases where the customer needs pricing before approval.

A quote usually includes:

• Customer and supplier details
• Description of the proposed work or goods
• Estimated price
• Optional tax estimate
• Valid-until date
• Assumptions or exclusions
• Acceptance instructions

A quote does not usually request payment unless your process requires a deposit after acceptance.

What a proforma invoice is for

A proforma invoice is a preliminary invoice. It looks more like a final invoice than a quote, but it is not usually the final accounting invoice. Businesses use proforma invoices to show the expected invoice amount before shipping goods, confirming an order, collecting prepayment, or preparing import documentation.

A proforma invoice often includes:

• Proforma invoice number or reference
• Seller and buyer details
• Item descriptions, quantities, and prices
• Tax, shipping, discount, or fee estimates
• Expected total
• Payment instructions if prepayment is needed
• Notes that the document is not a final tax invoice

The proforma invoice guide explains the document in more detail.

Proforma invoice vs quote: the practical difference

The simplest difference is intent. A quote helps the customer decide. A proforma invoice helps the customer or seller prepare for a transaction that is likely to happen.

Use a quote when:

• The work scope may still change
• The customer is comparing options
• You need approval before starting work
• You want to set expectations without issuing invoice-like paperwork

Use a proforma invoice when:

• The buyer needs a formal cost preview
• The order details are mostly agreed
• Prepayment may be required
• Shipping, customs, or internal purchasing needs invoice-style data
• You want to avoid issuing the final invoice too early

When to issue the final invoice

Issue the final invoice when the sale is complete enough for an official payment request or accounting record. For services, that might be after the work is delivered or when a milestone is reached. For products, it may be after dispatch or according to your sales terms.

The final invoice should use your normal invoice number sequence, show the final tax treatment, and clearly state the amount due. If payment terms matter, review invoice payment terms examples before sending.

Avoid confusing the customer

The customer should be able to tell what document they are looking at. Label it clearly as Quote, Proforma Invoice, or Invoice. Avoid sending multiple documents with similar totals and no explanation.

If a proforma invoice is not a tax invoice, say so in the notes. If prices may change, state how long the estimate is valid or which assumptions could affect the final amount.

FAQ

Is a proforma invoice legally binding?

It depends on the agreement and local law. In normal business use, a proforma invoice is usually a preliminary document, not the final invoice. For important transactions, get professional advice.

Can a quote become an invoice?

Yes. Many businesses use a quote to get approval, then create an invoice after the customer accepts. The final invoice should have its own invoice number.

Can I request payment with a proforma invoice?

Sometimes. A seller may use a proforma invoice to request prepayment before goods ship or work begins. Make the payment instructions and document status clear.

Which document should a freelancer send first?

For most freelance projects, send a quote or proposal first. After the client accepts the scope and price, send an invoice for a deposit, milestone, or final payment using the free invoice generator.