Proforma invoice vs Invoice: what each one is for
Proforma invoice versus invoice: one comes from the seller, the other from the seller; one sits at stage 4 of the flow, the other at stage 6. Below is the comparison table, the deciding difference, where each sits in the sequence and what goes wrong when they are confused.
Side by side
| Proforma invoice | Invoice | |
|---|---|---|
| Issued by | the seller | the seller |
| Sent to | the buyer | the buyer |
| Stage in the flow | 4 — preliminary bill | 6 — demand for payment |
| What it does | shows the buyer what the final invoice will look like, often to arrange prepayment, a letter of credit or import paperwork | requests payment and records the sale for tax and accounting purposes |
| Commitment | not binding | creates the debt |
| Requests payment? | no | yes |
| Proves delivery? | no | no |
| In the accounts | not booked as a sale; no tax point is created | revenue for the seller, a liability (accounts payable) for the buyer, and the tax point for VAT or sales tax |
| Lifetime | usually valid until the stated date or until the real invoice replaces it | payable by the due date; remains a record permanently |
| Make one with | Invoice Maker | Invoice Maker |
The deciding difference
A proforma looks like an invoice and is often a near copy of one, but it is not a demand for payment and not a tax document. It is issued before delivery so the buyer can arrange funds; the real invoice is issued after delivery and is the one that creates the debt and the tax point.
The shortest test: ask what happens if the proforma invoice is ignored, then ask the same of the invoice. Ignoring the proforma invoice means prepayment or customs clearance stalls, but nothing is owed; ignoring the invoice means the debt still exists, interest may accrue, and the seller can pursue it. The document with the harder consequence is the one that carries the obligation.
Where each one sits in the flow
The proforma invoice is issued at stage 4 and the invoice at stage 6 of the eight-step order-to-cash sequence. The steps between them, if any, are the documents that normally connect the two:
- 4. Proforma invoice (this page) — A preliminary invoice sent before delivery, used for prepayment and customs, not for the books.
- 5. Delivery note — What was in the box, signed for by whoever received it.
- 6. Invoice (this page) — The bill: what was supplied, what is owed, by when, and the tax on it.
Steps before the proforma invoice and after the invoice are on the business documents hub, which shows the full eight-step sequence with a checklist for every document.
Worked scenario
A machinery importer asks for a proforma so its bank can release a $38,000 advance. The seller issues PF-0044; the money arrives; the machine ships; the seller then raises INV-2026-0961 for $38,000 showing the advance as paid. Only INV-2026-0961 appears in either company's VAT return. Had the seller booked PF-0044 as revenue, the sale would have been counted twice.
Can one replace the other?
Neither replaces the other. The proforma invoice has to exist before the invoice makes sense, and a file that holds one without the other has a gap an auditor will ask about. Businesses that skip the proforma invoice usually discover why the first time an invoice is disputed.
Numbering and matching
Give each its own sequence and never share numbers between them. For the proforma invoice: Numbered separately from real invoices, and clearly labelled 'proforma', because it must not enter the sales ledger or a tax return. For the invoice: Sequential and unique by law in most countries; gaps and duplicates are the first thing an auditor looks for.
Common mistakes
On the proforma invoice side, watch for recording a proforma as revenue or claiming tax on it, when it is not a tax invoice. On the invoice side, watch for reissuing a corrected invoice under the same number instead of cancelling it with a credit note. The order-of-events list above is the check: if a document is being issued out of sequence, something upstream is missing.
Checklists: what to include in a proforma invoice and what to include in an invoice.