Electronic invoicing in 2026: adapting your website or software is becoming essential to manage compliant, connected invoices.
The reform does not concern accounting departments alone. It also affects e-commerce sites, business software, ERP systems, invoicing modules, customer interfaces, and custom-built internal tools.
For an SMB, a WooCommerce store, or a business application, the challenge is simple: transform a document PDF sent by email into a structured, traceable, and usable flow. This is precisely where web and mobile agencies like DualMedia can step in, in coordination with the certified public accountant, to adapt digital tools without disrupting operations.
Electronic invoicing in 2026: what changes for businesses
Electronic invoicing is not limited to sending an invoice as a PDF. Under the reform, the invoice must be issued, transmitted, and received through a structured process, via an approved platform or a compatible solution.
This change marks the shift from a static file to a data flow. Billing information becomes readable by software, automatically sent to the right recipient, and transmitted to the tax authorities according to the rules in place.
Businesses established in France and subject to VAT must be able to receive electronic invoices as of September 1, 2026. Issuance becomes mandatory on the same date for large companies and mid-sized companies, then on September 1, 2027 for the SMBs, small businesses, and microbusinesses concerned.
So the real issue is not only tax-related. It is also technical, organizational, and operational.
Who needs to adapt their website, software, or ERP to electronic invoicing
The reform applies to transactions carried out between businesses subject to VAT and established in France. It applies in particular to the sale of goods, services, advance payments related to these transactions, and certain specific cases such as public auctions of secondhand goods or works of art.
Affected parties include commercial companies, self-employed professionals, liberal professions, associations carrying out economic activity subject to VAT, as well as micro-entrepreneurs depending on their situation. Businesses under the VAT exemption regime do not charge VAT, but they are still affected by receipt requirements, and then by the obligations applicable to their case.
A B2B e-commerce site, a booking platform, a client extranet, or an in-house invoicing system will therefore need to be reviewed. The key point is to determine where the invoice is generated, which data is available, and how it can be transmitted in the correct format.
Electronic invoicing timeline and technical impacts
The timeline calls for gradual preparation, but the obligation to receive invoices starting in September 2026 makes waiting risky. Even a small business will need to be able to receive its invoices through a designated platform.
For internal software, this means anticipating connectors, formats, invoice statuses, mandatory data, and archiving. For an online store, you need to check whether the checkout flow, customer data, and invoicing module are ready to produce structured information.
| Date | Requirement | Businesses concerned | Impact on the information system |
|---|---|---|---|
| September 1, 2026 | Receipt of electronic invoices | All companies established in France and subject to VAT | Designate a platform, receive the flows, and adapt accounting processing |
| September 1, 2026 | Issuance of electronic invoices | Large companies and mid-sized companies | Connect your ERP, invoicing software, or business application to an approved platform |
| September 1, 2027 | Issuance of electronic invoices | SMEs, small businesses, and microenterprises concerned | Prepare the invoicing modules, test the flows, and train the teams |
This timeline gives small organizations the apparent leeway, but it should not obscure the reality: mandatory receiving comes first. A company that is not ready may run into supplier blockages well before it issues its first structured invoices itself.
Accepted formats and data to plan for in your software
Confirmed electronic invoices must rely on structured formats. The formats commonly cited are Factur-X, UBL, and CII, each serving different uses.
Factur-X often makes the transition easier, because it combines a readable PDF with embedded XML data. UBL and CII are better suited to highly integrated environments, especially when flows pass through an ERP, an API, or inter-application exchanges.
| Format | Principle | Recommended use |
|---|---|---|
| Factur-X | Hybrid document with readable PDF and structured XML data | SMEs, small businesses, e-commerce sites, and gradual transitions |
| UBL | XML format compliant with European standards | Companies equipped with an ERP or automated flows |
| CII | Format XML Cross Industry Invoice | Groups, complex exchanges, and international contexts |
A simple PDF sent by email will no longer be sufficient for the operations concerned. The software will need to produce the correct data, validate it, transmit it, and track processing statuses.
The new required information includes, in particular, the customer's SIREN number, the delivery address if it differs from the billing address, the nature of the billed transactions, and the information related to VAT on debits when this option applies.
Adapting an e-commerce site for electronic invoicing
A B2B e-commerce site can no longer treat the invoice as a simple document generated after payment. The invoice becomes a regulated flow, linked to the order, the customer, payment, delivery, and accounting.
On an online store, customer information must be reliable: SIREN, billing address, delivery address, VAT status, type of transaction, and order data. If these fields are missing or poorly controlled, the flow may be rejected or require manual corrections.
For WooCommerce sites, you need to check the compatibility of invoicing extensions, accounting exports, webhooks, and available connectors. Companies structuring their store can rely on resources such as the WooCommerce guide for an online store to better understand the technical foundations that need to be secured.
An online store created with no-code tools must also be audited. These solutions speed up time to market, but they must be able to communicate with invoicing platforms or with a reliable middleware, as highlighted by the approach presented around no-code tools to create an online store.
Adapting a business software application or custom software
Custom-built software is often at the heart of the issue. It generates quotes, orders, delivery notes, subscriptions, or invoices based on company-specific rules.
The risk appears when these tools were not designed to exchange structured data with an external platform. An interoperability layer must then be added: APIs, standardized exports, compliance checks, sending logs, and error handling.
DualMedia supports this type of project by auditing the complete technical journey: database, business logic, document generation, security, performance, and integration with third-party services. The goal is not to replace the existing system unnecessarily, but to make it compatible, maintainable, and compliant.
A common example involves a maintenance company that invoices from an internal extranet. Technicians close out a job, the software generates an invoice, and then the administration sends it to the customer. Tomorrow, that same flow will need to produce compliant data, transmit the invoice through a platform, and retrieve a usable processing status.
The steps to bring your system into compliance
Compliance should be handled as a digital project, not as a simple administrative formality. It involves management, accounting, sales teams, developers, web service providers, and the certified public accountant.
- Map customer and supplier invoicing flows.
- Identify the tools that create, modify, transmit, or archive invoices.
- Check the data available in the CRM, e-commerce, ERP, or business software.
- Choose a platform compatible with the company's actual needs.
- Define the necessary connectors, APIs, or exports.
- Test standard cases, credit memos, deposits, and rejections.
- Train teams on the new statuses and internal procedures.
- Set up monitoring with the accountant and technical contacts.
This approach reduces errors at startup. It also avoids choosing platforms disconnected from the information system, which can be costly in corrective developments.
Choose between a public platform, PDP, and a connected solution
Each company will need to designate a platform to receive its invoices, issue its flows, or transmit its data according to its scope. The choice depends on volume, the complexity of operations, existing software, and the level of automation sought.
A business with only a few invoices per month can make do with a simple setup. A company with multiple points of sale, subscriptions, an ERP, a B2B store, or international flows will need a more robust integration.
The choice should not be based on price alone. Technical compatibility, status management, archiving, security, support, and API capabilities must be evaluated.
| Option | Benefits | Limits to check |
|---|---|---|
| Public solution or basic service | Accessible approach for simple needs | Limited features for advanced integrations |
| Partner dematerialization platform | Automation, connectors, status tracking, complementary services | Costs, configuration, and compatibility to analyze |
| Middleware or custom connector | Fine-tuned adaptation to internal software and existing websites | Requires rigorous technical design |
In a business, for example, the point-of-sale software, the online store, and accounting often need to share the same data. A comprehensive approach can draw on best practices related to choosing point-of-sale software for a business, especially since invoicing comes directly from sales.
Security, archiving, and hosting of electronic invoices
The reform also strengthens requirements around integrity, authenticity, and document retention. Invoices issued or received in digital form must be kept in that form for the period required by applicable tax rules.
The system must therefore ensure reliable access to invoices, statuses, transmission logs, and related supporting documents. Unstable hosting, scattered storage, or poorly configured backups can weaken the entire setup.
Companies that operate online business software or a client platform must also verify availability, backups, server security, and the ability to handle exchanges with third-party services. A sound technical foundation, such as the one described in the challenges ofprofessional web hosting, becomes a compliance prerequisite.
The qualified electronic seal can also be used to secure certain invoices. It makes it possible to certify the document’s origin, integrity, and readability within a framework governed by the applicable legal texts.
Risks if your website or software is not ready
The first risk is operational. If the company cannot receive its suppliers’ invoices correctly, payments can be delayed, disputes can multiply, and certain supplies can be blocked.
The second risk is tax-related. A noncompliant invoice can lead to fines, administrative penalties, and, in some cases, a challenge to the right to deduct VAT. Amounts and procedures should be checked against official texts and with the accountant, as the regulatory framework may be further clarified.
The third risk concerns internal organization. Untrained teams will have to handle rejections, check unfamiliar statuses, and correct data urgently. This overload often comes at the worst possible time: month-end closing, peak business activity, or cash flow pressure.
The fourth risk is competitive. A prepared company invoices faster, automates more, and manages its outstanding receivables better. By contrast, an organization that is behind ends up spending its energy resolving errors instead of serving its customers.
How DualMedia supports technical adaptation
Adapting a website or software to electronic invoicing requires a dual perspective: understanding the reform and mastering the company’s digital architecture. This is where support from a web agency and experienced mobile agency becomes useful.
DualMedia works on WordPress sites, WooCommerce, SaaS platforms, mobile apps, extranets, APIs, and business software. The agency can audit existing data flows, propose a target architecture, develop the necessary connectors, and secure the user experience for internal teams.
The work is ideally done with the chartered accountant, because tax compliance and technical compliance must move forward together. A good project is not limited to connecting an API: it clarifies responsibilities, makes data more reliable, and makes anomalies understandable to users.
This approach avoids turning the reform into a stack of tools. On the contrary, it makes it possible to improve the system’s overall information performance.
Case study: an SMB invoicing from a B2B site
Imagine an SMB that sells spare parts to professionals through a B2B site. Today, the customer places an order, the site generates a PDF, the sales team sends it by email, and the accountant re-enters some of the information.
With e-invoicing, this process becomes fragile. The site must collect a reliable SIREN, distinguish between the shipping address and the billing address, generate a structured flow, and transmit the invoice through a compatible platform.
A relevant adjustment consists of cleaning up the customer database, adding the missing fields, connecting the site to an invoicing solution or middleware, and then testing the common scenarios. Credit notes, deposits, commercial discounts, and multi-address orders must be handled before going live.
The benefit goes beyond compliance: invoices go out faster, errors decrease, and accounting receives cleaner data. The reform then becomes a lever for productivity.
Our opinion
Electronic invoicing 2026 should be approached as a project of digital transformation. Companies that wait until the last minute risk having to absorb the reform, while those that anticipate it can streamline their management, improve their cash flow, and strengthen their compliance.
The best starting point is to audit the actual flows: where the invoice is created, who approves it, what data is missing, and which tools need to communicate with each other. From there, choosing the platform and connectors becomes much more straightforward.
For e-commerce sites, business applications, and custom software, technical support is often decisive. DualMedia can help turn this regulatory constraint into a reliable, scalable architecture that is genuinely useful on a daily basis.
What is electronic invoicing in 2026?
Electronic invoicing in 2026 refers to a structured process for issuing, transmitting, and receiving invoices. It does not correspond to a simple PDF sent by email, but rather to a data flow transmitted via an approved platform or one that complies with the prescribed rules.
Is my e-commerce site affected by e-invoicing?
Yes, an e-commerce site is affected as soon as it issues invoices for B2B transactions that fall within the scope of the reform. It is necessary to check customer data, invoice formats, accounting connectors, and the site’s ability to transmit structured information.
Will a PDF sent by email remain valid?
No, a simple PDF will no longer be sufficient for the operations covered by the réforme. The invoice must be transmitted in a structured format such as Factur-X, UBL, or CII, via a conforme circuit.
When should you adapt your invoicing software?
It’s necessary to start now, because receiving electronic invoices becomes mandatory for all affected businesses starting in September 2026. Development, testing, configuration, and training take time, especially if the software is older or custom-built.
What data needs to be added to software for electronic invoicing in 2026?
The software must handle reliable data such as the customer’s SIREN number, the delivery address, the nature of the transactions, and applicable VAT information. It must also produce structured formats and track transmission statuses.
Should an SME issue electronic invoices starting in 2026?
An SME must above all be ready to receive electronic invoices as of September 2026. The issuance requirement for the SMEs, small businesses, and microenterprises concerned will then take effect according to the planned schedule, but technical preparation must begin before then.
What is the difference between e-invoicing and e-reporting?
E-invoicing concerns electronic invoices between French businesses subject to VAT. E-reporting aims at transmitting data for certain transactions not covered by electronic invoicing, such as sales to consumers or international transactions.
Should you change accounting software to be compliant?
Not necessarily, because some software programs will offer updates or compatible connectors. However, you need to verify actual compatibility with approved platforms, the expected formats, and the company’s internal processes.
How can a custom in-house software be adapted to e-invoicing?
First, you need to audit the flows, data, and invoice generation rules. Then, an API, connector, or middleware can be developed to transmit invoices in the correct format and retrieve processing statuses.
What are the risks if my website or software is not ready?
The main risks are invoice rejections, payment delays, accounting errors, and internal disorganization. Non-compliance can also have tax consequences, particularly regarding deductible VAT depending on the situation.
Can DualMedia support an e-invoicing 2026 project?
Yes, DualMedia can support the technical adaptation of websites, WooCommerce stores, business applications, APIs, and custom software. The agency works on audits, architecture, connectors, user experience, and securing data flows.
What first action should you take to prepare for electronic invoicing in 2026?
The first step is to map all of the company’s billing workflows. This step makes it possible to identify the tools involved, missing data, accounting dependencies, and the most critical technical adaptations.
Would you like to get a detailed quote for a mobile application or website?
Our team of development and design experts at DualMedia is ready to turn your ideas into reality. Contact us today for a quick and accurate quote: contact@dualmedia.fr