Invoice, credit note, and quote in Belgian practice
Roles of quote, invoice, and credit note for Belgian SMEs: when to issue each, VAT impact, and Peppol relevance (quotes stay off the network).
Updated
- Belgium
Pick the document that matches the commercial moment
Belgian freelancers and SMEs use three commercial documents that look alike on screen. Mixing them up is the fastest way to break VAT evidence, numbering, and Peppol exchange. Use this article as a decision map: role, when to issue, and whether Peppol applies.
For the quote → invoice lifecycle steps, see Quote to invoice workflow. For Peppol credit-note mechanics, see Credit notes on Peppol.
Decision table
| Document | Role | Issue when | Typical VAT effect | Peppol |
|---|---|---|---|---|
| Quote | Commercial offer | Before acceptance; prices and scope still negotiable | None until invoiced | Usually not (no BIS Billing document) |
| Invoice | Payment claim + VAT evidence | After supply (or for a valid advance) | Creates / records VAT | Yes when the Belgian B2B mandate (or buyer policy) applies |
| Credit note | Formal correction of an invoice | Return, price error, partial cancel, agreed rebate after invoicing | Adjusts VAT downward when valid | Yes, same structured path as invoices |
Quote: offer, not receivable
A quote (devis / offerte) states prices, scope, and often a validity date. It invites acceptance. It does not open a receivable and is not a VAT document.
Operational rules that prevent later pain:
- Keep a separate quote sequence (
Q-2026-0042), never the invoice counter - Record acceptance (email, signed PDF, PO) before converting
- If scope changes after acceptance, revise the quote or add an addendum before invoicing
Quotes travel by email, PDF, or portal. They are not Peppol BIS Billing documents. Do not try to "Peppol a quote"; convert first, then send the invoice on the network.
Invoice: the document Peppol and VAT care about
An invoice (facture / factuur) documents a supply and, for VAT-liable businesses, is core VAT evidence. Belgian invoices need mandatory legal mentions. Once issued, treat the number as immutable.
From 1 January 2026, many domestic B2B invoices between Belgian VAT-liable parties must travel as structured Peppol messages. The commercial meaning stays the same; the channel and data format change. PDF-only email is not enough when the mandate applies. See the Belgian e-invoicing obligation (2026).
Credit note: correct, do not rewrite history
A credit note (note de crédit / creditnota) reduces or cancels amounts already invoiced. It must reference the original invoice. Informal "please ignore / we discounted" emails leave AP, AR, and VAT out of sync.
| Situation | Right document | Wrong habit |
|---|---|---|
| Client accepted but work not started | Keep quote; do not invoice yet | Converting quote to invoice early |
| Wrong price on a sent invoice | Credit note (+ corrected invoice if needed) | Editing the sent invoice |
| Partial return after delivery | Partial credit note linked to invoice | Silent line delete in books only |
| Deposit on signature | Advance invoice (not a quote) | Relabelling the quote as "invoice" |
On Peppol, credit notes use the BIS CreditNote family with the same validation discipline as invoices.
Numbering that survives audit
Belgian practice expects gap-free invoice sequences, usually a separate credit-note sequence, and quote codes that never look like final invoice numbers. Structured exchange makes duplicates and gaps easier to spot. Never renumber a document already sent on Peppol.
- Credit note
A formal document that reverses or reduces a previously issued invoice and adjusts amounts and VAT accordingly.