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
A quote is an offer. An invoice is the VAT document and payment claim. A credit note corrects an invoice already issued. In Belgium, only invoice and credit note travel on Peppol; quotes stay off the network.
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.
Worked example
Atelier Nord sends quote Q-2026-0011 (window repair, 680 EUR net). Studio Berg accepts by email. Atelier Nord issues invoice F2026-0088 on Peppol after the work. One line used the wrong hourly rate: credit note CN-2026-0004 references F2026-0088, then F2026-0089 bills the corrected amount. The quote never entered the invoice counter and never went on Peppol.
FAQ
What is the difference between a quote, an invoice, and a credit note?
A quote is an offer with no VAT effect. An invoice is the payment claim and VAT evidence. A credit note formally corrects an invoice already issued.
Does a quote go on Peppol?
No. Quotes stay on email, PDF, or portal. Convert to an invoice first, then send the invoice on Peppol when the mandate applies.
When must I issue a credit note?
When an invoice already sent needs a price, quantity, or cancellation correction. Do not edit or renumber the delivered invoice.
Can I reuse the invoice number after a credit note?
No. The credited invoice keeps its number. The credit note has its own number. A replacement invoice gets the next invoice number.
Is a deposit a quote or an invoice?
A valid advance is an invoice, not a relabelled quote. See the advance-invoice guide for timing and VAT.
Do invoice and credit note share one number series?
No. Keep a continuous invoice series and a separate credit-note series. Quotes use a third commercial series.