What Is a Proforma Invoice? A Plain-English Guide
A proforma invoice is one of those documents that sounds far more official than it is. Clients ask for one, suppliers send one, and customs officers expect one, yet almost nobody explains what it actually does. The short version: a proforma invoice is a preview of a bill, not the bill itself. It shows a buyer exactly what they will owe before the sale is final, without being a legal demand for payment. Used well it moves a deal forward, unlocks a deposit, and clears goods through customs. Used wrongly it sits in your accounts as income that was never really earned. Here is exactly what it is, how it differs from the documents around it, and when to send one.
The short answer
A proforma invoice is a price confirmation for a sale, sent before the sale is finalised. It lists the goods or services, the quantities, the price, and the expected total, formatted to look like an invoice but clearly labelled proforma. The word comes from the Latin for "as a matter of form", which is exactly what it is: an invoice in form, not in force.
The single thing to remember is that a proforma is generally not a binding demand for payment. You should not record it in your accounts as a sale, your client generally cannot use it to reclaim tax, and nobody is obliged to pay it on its own. It is a preview. Once the deal is agreed, you replace it with a real invoice, and that real invoice is the document that counts.
One note before we start: this is general business guidance, not legal or tax advice. Proforma rules, and how tax authorities treat them, vary by country, so check your own rules or ask an accountant.
Proforma invoice vs commercial invoice
This is the distinction that matters most, because getting it wrong causes tax and accounting headaches. A real invoice (sometimes called a commercial or final invoice) is issued after a sale is agreed. It is a binding request for payment, it carries a unique invoice number, it goes into your accounts receivable, and it is the document the tax authority and your client's bookkeeper rely on.
A proforma invoice comes before that. It is generally not a binding demand for payment, it should not use your main invoice sequence (if you number proformas at all, keep them in a separate series such as PF-001), it should not be recorded in your books as revenue, and in most countries it cannot be used to charge or reclaim VAT or sales tax. Tax authorities are explicit on this: the UK's HMRC, for example, says a proforma should be clearly marked so nobody mistakes it for a VAT invoice.
| Proforma invoice | Commercial invoice | |
|---|---|---|
| Sent | Before the sale is final | After the sale is agreed |
| Binding | Generally not, on its own | Yes, it requests payment |
| Invoice number | No main-sequence number | Unique sequential number |
| In your accounts | Should not be recorded as a sale | Recorded in accounts receivable |
| Tax | Cannot usually charge or reclaim VAT | The document for VAT and tax |
For the full side-by-side on every document, including how a proforma differs from a quote and a receipt, see our guide to proforma invoice vs invoice.
Proforma invoice vs a quote
If a proforma is not a real invoice, how is it different from a quote? They sit on a line that runs from casual to committed. A quote is the first, loosest step: here is roughly what the work would cost. A proforma invoice is the middle step: the buyer has decided to go ahead, and this is the detailed, itemised confirmation of what they will be billed, formatted like the final invoice so there are no surprises. The real invoice is the last step: the sale is done, now please pay.
In day-to-day freelancing you often do not need all three. A quote and then an invoice is plenty for most jobs. The proforma earns its place when the buyer needs a formal, invoice-shaped document to act on before the final bill can exist. If you want the full picture of which document does what, our explainer on quote, proforma, invoice or receipt lays out all four side by side.
When to send a proforma invoice
There are four situations where a proforma is the right tool, and all of them share one feature: the buyer needs to act before you can issue a real invoice.
1. You need a deposit before you start. A proforma lets a client approve an advance or get internal budget signed off against a formal-looking document, before any work is delivered. One caveat: in some countries an advance payment itself needs a proper tax invoice or receipt, so check how deposits are treated where you are. 2. The client's finance team needs paperwork to raise a purchase order. Many companies cannot release funds without a document to match a PO against, and a quote is often too informal for that. 3. You are shipping goods across a border. A proforma is common in international trade when no commercial invoice exists yet, for example for samples, gifts, or goods sent before the sale completes, and it helps customs estimate the value and likely duties. The US International Trade Administration describes this use. The commercial invoice remains the standard document for clearing a completed sale. 4. The scope or final total might still shift slightly. A proforma signals "this is what it will be, give or take", without committing you to a figure the way a real invoice does.
If you invoice clients in other countries, the proforma usually travels alongside the currency, customs and payment-detail questions covered in our guide to invoicing international clients.
What to put on a proforma invoice (template checklist)
A proforma should look almost identical to your normal invoice, with two differences: it is clearly titled "Proforma Invoice", and it carries no main-sequence invoice number. Here is the checklist:
- The words Proforma Invoice at the top, so there is no confusion.
- Your business name, address and contact details.
- The client's name and address.
- The issue date, and a validity date (for example "valid for 30 days"), since prices are an estimate.
- A clear line-by-line description of the goods or services, with quantities and unit prices.
- The subtotal, any estimated tax or shipping, and the estimated total.
- The currency code next to every figure if the client is abroad, such as USD 1,500 rather than a bare 1,500.
- Your payment details and terms, so the client knows what happens next.
- A short line stating it is not a demand for payment and not a tax invoice.
You do not need separate software for this. If you already have an invoice template, you can label a copy "Proforma Invoice" and leave off the invoice number.
How to turn a proforma into a real invoice
The proforma is only a preview, so the workflow matters. Once the client confirms the order, or pays the deposit, you issue the real invoice: same line items, same agreed total, but now with a unique invoice number, the proper tax treatment, and a firm due date. That real invoice is the one you record in your accounts and the one your client pays and books.
A quick example. You win a USD 1,500 design project and the client wants a 50 percent deposit. You send a proforma invoice listing the work and the full USD 1,500, clearly marked proforma, with a note that half is due to start. When the client pays the USD 750, you issue a real, numbered invoice: the full USD 1,500 of work, the USD 750 deposit shown as already paid, and USD 750 as the balance due on completion. Same figures, now in your books.
The trap to avoid is treating the proforma as if the money is already in. Until the real invoice is raised and settled, nothing has been earned on paper. Carry the exact figures across so the two documents agree, and if the client goes quiet after the proforma, our guide to asking a client for payment has the wording that nudges things along.
Common mistakes to avoid
Giving a proforma your main invoice number. This double-counts in your books and confuses your bookkeeping. Keep proformas out of your invoice sequence, or in a separate series such as PF-001. Recording it as income. A proforma is not a sale, so it should not sit in accounts receivable until it becomes a real invoice. Using it to settle tax. In most places VAT is only chargeable and reclaimable on a proper tax invoice, so a proforma should not be the document a client uses for tax. Forgetting to replace it. The most common slip of all: the client pays against the proforma and you never issue the real invoice, leaving a hole in your records. Always close the loop with the final invoice.
Create a proforma invoice in minutes
You do not need special software to send a professional proforma. With Remit you build an invoice in any currency, with your logo and bank details, and label it as a proforma when the client needs the formal document first. Then send a quote to agree the terms, the real invoice to get paid, and a receipt to close it, all free and without retyping anything between steps. If you are not sure which document to send and when, start with our guide to what to send and when.
