Factur-X, what exactly is it? The electronic invoice format explained to a tradesperson, not an IT specialist

In brief: Factur-X is the file format that is gradually replacing the PDF invoice you currently send to your clients. It's a technical standard, not software or a paid service. If you are a tradesperson, you are concerned, whether you are a micro-entrepreneur, in an EURL, or an SARL. This guide explains who must use it, by what date, and what it really changes on a job site.

Factur-X explained simply: it's an invoice… but improved

Imagine your usual paper or PDF invoice. You put your name, the job site address, the details of the work, the total amount including tax. Factur-X keeps all of that, identically. The difference is that it adds, in the same file, organized data that a computer can read on its own. It's a bit like an invoice that would carry, in addition to the normal writing, an invisible label for you but readable by a machine. You, you only see the usual invoice.

A format, not software: the true definition

Factur-X is not a company, nor an application to download. Factur-X is a standardized file format that combines, in a single document, a human-readable PDF invoice and structured data readable by a computer. It's a mold imposed by the texts that frame the electronic invoicing reform. Any invoicing software can produce this format, provided it is equipped for it. So you don't have to buy anything called "Factur-X". You just need software that knows how to generate it.

How it's different from a classic PDF invoice you use today

Today, your PDF invoice is readable by you and your client. It remains invisible to the tax administration, which only sees it if it requests it from you. With Factur-X, the PDF remains identical to the eye. A layer of data is added behind it, invisible when the file is opened normally. This layer allows invoicing software, accountants, and the administration to automatically read the amount, VAT, and client references. You, you open and read your invoice exactly as before.

Factur-X: who is really concerned?

The answer is in one sentence: if you invoice a professional client, you are concerned, whatever your status. What changes is the date on which each obligation applies, receiving on one side, issuing on the other.

You must receive it (it's mandatory for everyone, no exceptions)

Receiving a Factur-X invoice will be mandatory for all VAT-registered companies. This includes micro-enterprises, even those that are VAT-exempt and therefore do not charge VAT to their clients. This reception obligation applies from September 1, 2026. Concretely, your software must be able to open and process a Factur-X invoice sent by a supplier, a material wholesaler, or a subcontractor.

You must issue it (it depends on the size of your company)

The obligation to issue, on the other hand, follows a different calendar depending on the size of the company. Large companies and ETIs (intermediate-sized enterprises) must issue in Factur-X format from September 1, 2026. SMEs (small and medium-sized enterprises) and VSEs (very small enterprises), a category that includes most tradespeople in SARL or EURL, have until September 1, 2027. This difference in timing allows smaller structures to organize themselves without rush.

Special cases: if you are a micro-entrepreneur or VAT-exempt

Whether you are a plumber in an EURL, a mason in an SARL, or an electrician in a micro-enterprise, the reception rule applies to you without exception, from September 1, 2026. For issuance, your micro-enterprise status does not exempt you from anything, but classifies you, like the vast majority of tradespeople, in the category that must issue from September 1, 2027. Being VAT-exempt changes nothing to this obligation: this regime exempts from invoicing VAT, not from complying with the Factur-X format. The simplest way is to check your exact category, VSE, SME, ETI, or large enterprise, with your accountant, to know your precise date.

When exactly do I have to switch to Factur-X?

Two dates are enough to remember. They apply to everyone, but not in the same way.

The dates: who must switch when

Remember this above all: receiving comes earlier, for everyone. Issuing comes later if your company is small.

Concretely for a building tradesperson: what it means for you

Let's take an example. You run an SARL plastering company with a few employees. You are a VSE or an SME depending on your turnover and workforce. Your mandatory issuance date is therefore September 1, 2027. The same applies if you are in an EURL as a plumber, or in a micro-enterprise as an electrician: you issue in Factur-X format from September 1, 2027. However, your ability to receive a Factur-X invoice must be operational by September 1, 2026, one year earlier. This delay gives you time to choose your tool without urgency. It's not the size of the job site that matters here, it's the size of your company in the fiscal sense.

Will I have to pay more or invest in new software?

Many tradespeople imagine an expensive, complex system behind this reform. This is not the case.

No, Factur-X is a free format (it's a legal obligation, not a service being sold to you)

Factur-X, as a format, costs nothing. No one sells "Factur-X". It is a technical standard set by the texts framing the reform, comparable in this respect to a file format like PDF itself. No publisher can charge you for the use of the format as such. What you pay, eventually, is the subscription to invoicing software, not the Factur-X format.

Compatible invoicing software and what it costs

Several quoting and invoicing software solutions already know how to generate Factur-X files, or are preparing to do so. Some are free, others work on a monthly subscription. Quickote, a quoting and invoicing application designed for freelancers, is one of them. Regarding its situation concerning the reform, the publisher specifies: « Quickote génère vos factures au format Factur-X. Le raccordement à une Plateforme Agréée, nécessaire à l'émission obligatoire de septembre 2027, est en cours de finalisation. » The choice of one software over another depends mainly on your specific needs: it's better to compare several tools than to rush into the first one you find.

Real impact on your operating costs

If you already use invoicing software that integrates Factur-X, the impact on your budget is zero. If you need to change tools, the cost depends on the chosen subscription, not the format itself. In any case, the Factur-X format alone does not generate any additional costs. It is the eventual change of software, not the reform, that has a cost, and this cost often remains modest compared to the time saved on invoicing.

How will it work for me daily?

The good news is in one sentence: the technology remains invisible to you.

What your software will do alone (you have nothing to do)

Your invoicing software generates the Factur-X file for you. It structures the data, associates it with the PDF, and archives the invoice according to current rules. It transmits, if necessary, the required information to the relevant platforms. All this mechanism runs in the background, when you click "send invoice".

What you need to do (spoiler: almost nothing, you continue as before)

You create your invoice as you already do: job site number, work details, amount, client contact information. No additional fields are added to your usual form. No technical skills are necessary. Your role remains what it is today: accurately describe the service and verify the amount before sending.

Approved Platforms explained simply (the invisible role)

An Approved Platform is a platform registered by the DGFiP, the tax administration, responsible for routing electronic invoices and transmitting certain data to the administration. Imagine it as an official mailbox between businesses and the tax authorities. Some invoicing software are themselves Approved Platforms. Others use a partner Approved Platform to ensure this transmission. In both cases, you have nothing to configure: the software manages this connection.

Impact on your job site, down payment, and regularization invoices

Your way of invoicing a job site does not change. You continue to request a down payment at the start, then a regularization invoice at the end of the work, as you do today. Factur-X does not invent a new invoicing logic; it only changes the file format. Your client will still see a readable PDF, with the same level of detail as today: nature of work, down payment amount, remaining balance due. In many cases, the Factur-X invoice that lands in the client's inbox looks, on screen, exactly like the one sent the previous year.

What changes for the invoices you receive (suppliers, subcontractors, distributors)

Your material suppliers, wholesalers, and subcontractors will gradually send you invoices in Factur-X format. Your invoicing or accounting software will be able to read them automatically. Concretely, this means less manual entry: the amount, VAT, and order reference fill in automatically in your accounting. It also limits transcription errors, a frequent source of discrepancies between a supplier invoice and what is recorded in accounting.

Step 1: check that your current software handles Factur-X

Start by looking at your quoting and invoicing software's documentation, or ask the publisher directly. If it already handles Factur-X, you have nothing more to do. If it doesn't yet, ask for its planned update date. If no clear deadline is announced, it's worth comparing it with another tool, free or paid, that already offers it.

Step 2: test a first Factur-X invoice before the deadline

Once your software is ready, generate an invoice in Factur-X format for a real or fictitious job site. Open the resulting file, check that you can read it normally, like a classic PDF. Send it to a trusted client, or to your own email address, to ensure that it also opens correctly on their end. This simple verification is enough to reassure you, well before your deadline.

Step 3: archiving and retention (no special action)

You already keep your accounting documents, including invoices, for 10 years from the end of the financial year. This rule also applies to micro-enterprises. A Factur-X invoice is kept exactly according to the same rules as a classic PDF invoice. The format changes, the retention period remains identical.

Factur-X, CII, UBL: the three accepted formats (and why Factur-X wins)

The French reform does not impose a single format but a common base. Three syntaxes are accepted: Factur-X, which combines a readable PDF and an XML data file in a single document; CII, a 100% data format with no PDF; and UBL, another 100% data format widely used in European public procurement. CII and UBL display nothing on screen: they are designed to be read by software. Factur-X is the only one of the three that remains readable by a human without any special tool. That is why it prevails among freelancers, small businesses and tradespeople: your client opens a normal PDF, while the machine reads the hidden data.

What the file actually contains

A Factur-X file is a PDF/A-3 document with an XML file attached. The PDF displays your invoice exactly as today. The XML contains the same information as fields: issuer identity, invoice number, date, net amounts, VAT, total, client details. Both must say exactly the same thing, and your software takes care of that.

Why a PDF sent by email will no longer be enough

A classic PDF, however well designed, is just a picture of an invoice to a machine: nothing in it is structured. The tax authority cannot automatically extract the VAT, and your client has to retype the amounts into their accounting tool. This is exactly what the reform targets: removing re-entry, making VAT reliable and reducing fraud. From the mandatory dates onwards, a simple PDF sent by email will no longer count as a valid electronic invoice between businesses. The problem is not the layout, it is the absence of computer-readable data.

What are the risks if you are not compliant?

Penalties target the failure to issue in the correct format and the failure to transmit e-reporting data. Failure to issue an electronic invoice is penalised at 15 € per invoice. Failure to meet e-reporting obligations is penalised at 250 € per transmission. These fines are capped at 15,000 € per year. The risk is real, but easy to handle: simply use a tool that generates the right format when the time comes.

The simplest step: check your software before the deadline

Ask your provider three questions: does my software already generate Factur-X files? Can it receive and read a supplier's Factur-X invoice? Is it connected to an approved platform, or will it be before my own deadline? If all three answers are yes, there is nothing else to do. Regarding Quickote: « Quickote génère vos factures au format Factur-X. Le raccordement à une Plateforme Agréée, nécessaire à l'émission obligatoire de septembre 2027, est en cours de finalisation. »