Proforma Invoice: What It Is, When to Use One, and How to Get Paid
A proforma invoice is one of those documents that sounds more complicated than it is. Strip away the Latin and it is just this: a preliminary bill you send before the real one. It tells a buyer exactly what they are about to pay for, how much it costs, and under what terms, without officially demanding payment yet. Think of it as a quote wearing a suit.
If you sell software, digital products, or services across borders, you will run into proforma invoices whether you like it or not. Customers in procurement-heavy companies ask for them. Customs officials want them. Finance teams need them to open a purchase order. Getting this document right removes friction from deals that would otherwise stall for weeks.
This guide covers what a proforma invoice actually is, how it differs from a commercial invoice, when you should send one, and how to stop treating invoicing as a manual chore.
TL;DR
- A proforma invoice is a preliminary, non-binding bill sent before goods or services are delivered.
- It is not a legal demand for payment and does not count for tax or accounting purposes.
- Use it for quotes, customs declarations, purchase order approvals, and advance-payment deals.
- A commercial invoice is the real, legally recognized bill that follows.
- If you sell digital products globally, a Merchant of Record like Creem handles the invoicing, tax, and payment flow so you never have to hand-build these documents.
What is a proforma invoice?
A proforma invoice is a good-faith estimate of a sale, formatted like an invoice, sent to a buyer before the transaction is finalized. The phrase "pro forma" is Latin for "as a matter of form," which is a fancy way of saying "this is what the real thing will look like."
It lists the same details you would expect on a standard invoice: a description of the products or services, quantities, unit prices, the total amount, currency, and payment terms. What it does not do is create a payable debt. Nobody owes anybody money based on a proforma invoice. It is a preview, not a bill.
Here is why that distinction matters. Because a proforma invoice carries no legal or accounting weight, you can revise it freely. If the buyer wants to change quantities or the scope shifts, you reissue it. There is no accounting entry to unwind and no tax already recorded. That flexibility is exactly why buyers ask for one before committing.
A few things a good proforma invoice always includes:
- The words "Proforma Invoice" clearly at the top so nobody mistakes it for a real bill.
- Your business name and contact details.
- The buyer's details.
- An itemized breakdown of what is being sold.
- Estimated total, including any taxes, shipping, or fees.
- Validity period, since prices and estimates expire.
- Payment terms and accepted methods.
Proforma invoice vs commercial invoice
This is the comparison people actually search for, so let us settle it. The two documents look almost identical, which is why they get confused. The difference is entirely about timing and legal standing.
A proforma invoice comes first. It is an estimate. It is not entered into your books, it does not trigger a tax liability, and the buyer cannot use it to reclaim VAT or record an expense. It exists to align both sides before money moves.
A commercial invoice comes after. It is the official, legally binding request for payment issued once the deal is confirmed or the product is delivered. This is the document your accountant records, the one the tax authority cares about, and the one the buyer files to claim input tax.
Put simply: the proforma invoice says "here is what you will owe." The commercial invoice says "here is what you now owe." One is a promise, the other is a receivable.
Confusing the two causes real problems. If you record a proforma invoice as revenue, your books are wrong. If a buyer tries to reclaim tax off a proforma, their filing is wrong. Always issue a proper commercial invoice for the actual transaction.
When should you send a proforma invoice?
There are four situations where a proforma invoice earns its keep.
1. Formal quotes for B2B buyers. When you sell to a company with a procurement process, a plain email quote often is not enough. Their finance team needs a structured document to raise a purchase order. A proforma invoice gives them exactly that, with line items and totals they can approve internally.
2. Advance-payment deals. If you require a deposit or full payment before starting work, a proforma invoice sets the expectation. The buyer sees the amount, agrees to it, pays, and then you issue the commercial invoice against the completed order.
3. Customs and international shipping. For physical goods crossing borders, customs authorities frequently require a proforma invoice to assess duties and clear the shipment before the final commercial invoice exists. It declares the value and nature of the goods.
4. Getting internal sign-off. Sometimes the person you are selling to is sold, but their boss or budget owner is not. A clean proforma invoice is an easy artifact to forward up the chain for approval without committing anyone to payment.
If none of these apply and you are selling low-ticket digital products to individuals, you probably do not need a proforma invoice at all. A clear checkout and an automatic receipt do the job.
The problem with doing this manually
Here is where invoicing quietly becomes a tax on your time. Every proforma invoice you build by hand in a spreadsheet or a Word template is a small drain. You copy details, calculate totals, guess at the tax treatment, and hope you got the numbers right.
Now multiply that by international sales. The moment you sell across borders, tax stops being a rounding error. You are potentially on the hook for VAT in the EU, GST in a dozen jurisdictions, and sales tax across US states with wildly different rules. Working out the correct estimated tax to put on a proforma invoice, then the correct real tax on the commercial invoice, is a genuine compliance burden.
Most founders selling software or digital products did not start a company to become part-time tax filers. Yet that is what manual invoicing across borders turns into. You either spend hours on it, hire an accountant per region, or get it wrong and deal with the consequences later.
There is a cleaner path.
How a Merchant of Record removes the whole problem
A Merchant of Record (MoR) becomes the legal seller of your product. When a customer buys from you, they are technically buying from the MoR, who then pays you. That single shift changes everything about invoicing and tax.
Because the MoR is the seller of record, it handles the entire billing document flow. Invoices are generated automatically, formatted correctly, and sent to the customer without you touching a template. The correct tax is calculated and applied for the customer's location, collected, and remitted to the right authority. You do not register for VAT in the EU. You do not track economic nexus across US states. You do not manually build a proforma invoice for a customer in Germany and a commercial invoice for one in Brazil.
Creem is built exactly for this. It is a Merchant of Record for software and digital products, which means it takes on the sales tax, VAT, and GST liability globally, handles the invoicing and billing automatically, and manages subscriptions, one-time payments, and refunds. Your job shrinks back to building the product and closing the deal.
For the B2B situations where a buyer genuinely needs a proforma-style document, an MoR platform generates compliant invoices as part of the flow, so you are not stitching PDFs together at midnight. For everything else, the customer gets a clean checkout and an automatic, tax-correct receipt.
The pricing is simple too. Instead of stacking a payment processor, a tax engine, and an accountant, you get one flat rate that bundles the whole stack. You can see the full breakdown on the Creem pricing page.
Frequently asked questions
Is a proforma invoice legally binding? No. A proforma invoice is not a legal demand for payment and creates no obligation. It is an estimate. The legally binding document is the commercial invoice issued after the deal is confirmed.
Can a customer pay against a proforma invoice? They can send payment based on the figures in it, which is common for advance-payment deals, but you should always follow up with a proper commercial invoice for the actual transaction. The commercial invoice is what gets recorded for tax and accounting.
Does a proforma invoice include tax? It includes estimated tax so the buyer sees the expected total, but that tax is not officially recorded or remitted until the commercial invoice is issued. This is one reason cross-border tax estimates are tricky to get right by hand.
What is the difference between a quote and a proforma invoice? They overlap heavily. A quote is usually a looser, less formal price estimate. A proforma invoice is a more structured, invoice-formatted version that procurement and customs teams prefer because it maps cleanly to a purchase order.
Do I need proforma invoices if I sell digital products online? Usually not for individual consumers. You mostly need them for B2B buyers with formal procurement, advance-payment arrangements, or customs. A Merchant of Record can generate the right documents automatically when a buyer does need one.
Does a proforma invoice count as revenue? No. Never record a proforma invoice as revenue. It carries no accounting weight. Only the commercial invoice represents a real receivable.
The bottom line
A proforma invoice is a simple, useful document: a preview of a bill that lets both sides agree before money moves. Send one for formal quotes, advance payments, customs, and internal approvals. Follow it with a real commercial invoice once the deal is done. And never, ever book it as revenue.
The harder part is not the document itself. It is the tax and compliance layer sitting underneath every international sale. If you are selling software or digital products globally, you do not have to become a full-time invoicer and part-time tax filer.
Let a Merchant of Record carry it. Creem handles the invoicing, the global sales tax and VAT, and the payments, so you can get back to shipping. See how it works on the pricing page and start selling worldwide without the paperwork.
