Guides
Updated 21 August 2026
Short guides on what arrives on 1 September 2026, on the Factur-X format, and on the files that come with it. Informative, jargon-free, and free of legal advice: for that, your accountant.
What is Factur-X?A readable PDF plus XML data in a single file: how a Factur-X invoice works, its profiles, and why one is about to land in your inbox.
Checking a received Factur-X invoiceXML attachment, profile, mandatory fields, PDF/XML coherence: what to check when a Factur-X invoice arrives, and how to do it in 10 seconds.
September 2026: who must do whatReception mandatory for every business, issuance phased through 2027, accredited platforms: the reform timeline, without the jargon.
The five Factur-X profiles, explainedMINIMUM, BASIC WL, BASIC, EN 16931, EXTENDED: what each profile carries, what it does not, and which one matters under the French reform.
The most frequent VAT errorsA category contradicting its rate, totals that do not add up, one decimal too many, an exemption without a reason: four families of errors the EN 16931 rules catch every day.
Micro-entrepreneurs: what changesYes, the reform applies to you: reception becomes compulsory for every business, VAT-exempt micro-entrepreneurs included. What changes, what does not, and when.
The required fieldsNumber, date, type code, currency, seller name, buyer name: the six fields that fail the most invoices, and what each rule actually checks.
The totalsLine total, allowances, charges, total excluding VAT, total including VAT, amount due: how the chain links up, and why it is checked to the cent.
The parties and their addressesThe country code is required even on an entirely French invoice, and a SIREN alone is not a VAT number. The rules on the parties, explained.
Structure errorsFactur-X's widest family of checks does not judge your amounts: it verifies that each piece of information is written once, in the right place, with its attributes.
The currencyAn invoice has one currency, and VAT may have a second. Why a VAT amount with no currency attribute is refused, and why two amounts are not better than one.
The delivery blockThe part of the invoice nobody rereads, and which blocks all the same: the goods recipient, its address, the actual delivery date and the despatch advice.
Party identifiersA SIRET and a GLN are not read the same way, and a VAT number is told from a tax identifier only by an attribute. What Factur-X requires around each number.
Document-level allowances and chargesA commercial discount or shipping costs added to the whole invoice, not to one line: the amount, VAT and reason this block must carry, and what an incomplete file fails on.
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