If a client has ever asked you for a 'proforma' and you quietly Googled what that meant — you're not alone. It's one of those invoicing terms that sounds more complicated than it actually is.

Here's everything you need to know.

What Is a Proforma Invoice?

A proforma invoice is essentially a preliminary invoice — a document you send to a client before the work is done or the goods are shipped. It outlines what the final invoice will look like: what's being provided, the estimated cost, payment terms, and other details.

The key word is 'estimated.' A proforma is not a final demand for payment. It's more like a formal preview — a way of saying 'here's what this will cost, please confirm before we proceed.'

How Is It Different from a Regular Invoice?

• Regular Invoice: Sent after work is complete. A legally binding request for payment.
• Proforma Invoice: Sent before work begins or goods are delivered. Not legally binding. Used for agreement and planning purposes.
• Quote/Estimate: Similar to a proforma but usually less formal. A proforma often looks more like a real invoice.

When Should You Send a Proforma Invoice?

• When working with international clients who need customs documentation
• When a client's company requires budget approval before committing to a project
• For large projects where the client wants to confirm scope and pricing before work starts
• When a client asks for one specifically (procurement departments often require them)

What Should a Proforma Invoice Include?

A proforma invoice should include the same information as a regular invoice — your details, the client's details, a description of work, estimated costs, payment terms, and a due date. The main difference is labeling it clearly as 'Proforma Invoice' at the top, so no one confuses it for a final bill.

Do You Still Need to Send a Final Invoice?

Yes, always. A proforma is not a substitute for a real invoice. Once the work is done and the final amount is confirmed, send a proper invoice with the exact amount due. Some clients will have already paid based on the proforma — in that case, your final invoice should show the amount received and any remaining balance.

Think of a proforma as a handshake before the deal. It sets expectations, builds trust, and gets everyone on the same page before a single hour of work begins.