Connecting your e-commerce website to invoicing software has become essential to automate sales, secure VAT, and prepare your online store for mandatory electronic invoicing.
For an online merchant, invoicing is no longer just a simple PDF generated after payment. It becomes a structured, traceable flow connected to the tax authorities, business customers, accounting tools, and sometimes international platforms.
The right approach is to connect the e-commerce CMS, invoicing software, ERP, or accounting system around a reliable workflow. DualMedia regularly supports companies with this type of web and mobile integration, especially when WooCommerce, PrestaShop, Shopify, or a business application must communicate with external services.
Why connect your e-commerce website to invoicing software
Connecting your e-commerce website to invoicing software helps avoid manual reentry, VAT errors, missed invoices, and discrepancies between orders and accounting. As soon as an order is paid, the system can create the invoice, archive it, send it to the customer, and pass useful data to the right tool.
This automation becomes even more strategic with the rollout of electronic invoicing. Starting September 1, 2026, all companies will have to be able to receive electronic invoices, while issuance will roll out gradually depending on company size.
An e-commerce merchant who sells to both consumers and professionals must therefore organize their flows now. The site should no longer just sell: it must qualify the customer, transmit the right data, and comply with applicable tax rules.
Understanding electronic invoicing before connecting your e-commerce site
An electronic invoice in the regulatory sense is not a simple PDF file sent by email. It must contain structured, machine-readable data, in formats such as XML, UBL, CII, or Factur-X.
The goal of the rollout is to streamline exchanges between businesses, strengthen the fight against VAT fraud, and transmit certain data to the authorities. For an online store, this means a change to the technical architecture, not just a cosmetic update.
E-invoicing and e-reporting for online stores
E-invoicing concerns B2B transactions between companies established in France. In this case, the invoice must pass through an approved platform rather than being sent directly to the business customer.
E-reporting concerns, in particular, B2C sales, international sales, and certain intra-EU transactions. A site that mainly sells to consumers is therefore still affected, even if the end customer often continues to receive a standard document in their customer area.
This distinction is essential: the same checkout flow may need to handle two different logics depending on whether the buyer is an individual or a business.
The timeline to include in your e-commerce project
The rollout of electronic invoicing will apply gradually. Large companies and mid-sized companies will have to issue electronic invoices and transmit their data starting September 1, 2026.
SMEs and microbusinesses will be subject to the issuance requirement starting September 1, 2027. However, the obligation to receive electronic invoices starts for all companies as of September 1, 2026.
| Due date | Businesses concerned | Main requirement | Impact on the e-commerce site |
|---|---|---|---|
| September 1, 2026 | All companies | Receipt of electronic invoices | Choose a compatible platform or tool to receive supplier invoices |
| September 1, 2026 | Large companies and mid-sized companies | Issuance and e-reporting | Connect the site, ERP, or billing software to an approved platform |
| September 1, 2027 | SMEs and microenterprises | Issuance and e-reporting | Automate B2B, B2C, and international flows before the deadline |
Waiting until the last minute exposes the company to rushed integrations. An invoicing connector must be tested with payment statuses, credit notes, refunds, shipping fees, discounts, and the various VAT rates.
Choosing between an approved platform, a compatible solution, and billing software
The new ecosystem is built on several components. The approved platform plays a central role because it is registered with the tax authorities to transmit electronic invoices and the expected data.
Billing software, the ERP, or the e-commerce module can act as a compatible solution. It generates the data in the correct format, then transmits it to an approved platform that handles regulatory routing.
The Public Invoicing Portal notably retains its role as a directory and tax data hub. It makes it possible to know which platform a recipient company should receive its invoices through.
Selection criteria for e-commerce billing software
Good billing software does more than generate clean PDFs. It must handle structured formats, statuses, credit notes, archiving, VAT, and exchanges with accounting tools.
- Compatibility with an approved platform registered with the tax authorities
- Native connection or robust API with PrestaShop, WooCommerce, Shopify, or Magento
- Support for Factur-X, UBL, CII, or an equivalent structured format
- Invoice status tracking: submitted, rejected, paid, or rejected
- Reliable processing of credit notes, refunds, and product returns
- Legal archiving of documents and traceability of exchanges
- Compatibility with e-reporting for B2C and international sales
In a redesign or technical upgrade project, DualMedia recommends choosing the tool after mapping the flows, not the other way around. The right connector depends on order volume, the B2B/B2C mix, the CMS, and the ERP’s potential role.
Prepare customer data before connecting the invoicing software
Data quality becomes the starting point of compliance. A business customer must be identified correctly, notably with a valid SIRET, a reliable company name, and a standardized address.
If the site accepts B2B orders without checks, errors carry over into the invoice, then into the accounting software and the approved platform. The risk is simple: a rejected invoice, a delayed payment, or a costly manual correction.
Adapt the checkout flow for business customers
The checkout flow must clearly distinguish an individual from a company. A required SIRET field for business accounts, combined with API validation, limits errors at the point of entry.
An online store that sells computer hardware can, for example, offer a clear choice: “individual” or “business.” If the buyer selects “business,” the site requests the legal information before finalizing the order.
This logic also improves theuser experience. The customer understands why certain information is requested, and the merchant avoids corrections after invoicing.
Connect PrestaShop, WooCommerce, or Shopify to invoicing software
The choice of method depends on the CMS. Some sites can use a ready-made module, while others require an API integration, especially when the checkout flow or business rules have been customized.
Before installing a connector, you need to verify who controls the invoice: the CMS, the ERP, or the invoicing software. Dual control often creates duplicates, inconsistent numbers, or VAT discrepancies.
Connect PrestaShop to invoicing software
PrestaShop often relies on invoicing modules or connectors provided by vendors. This is effective for a standard store, but an audit becomes necessary if the site uses overrides, marketplace modules, or advanced pricing rules.
The comparison between e-commerce solutions is also important when it comes to an upgrade. To explore this choice further, the guide PrestaShop vs Shopify helps explain the differences in flexibility, maintenance, and integration.
Connect WooCommerce to an invoicing solution
WooCommerce is very flexible, but its native accounting features remain limited for advanced flows. The cleanest approach is often to use the REST API and webhooks that trigger invoice creation after payment is confirmed.
The legal document can then be stored in the invoicing software, then made accessible in the WordPress customer area. Merchants who structure their store on WordPress can also consult the WooCommerce guide for online stores to better frame their architecture.
Connect Shopify to an invoicing application
Shopify functions more like a closed SaaS environment. Integration is usually done through an app available on the App Store or through synchronization with an external tool.
You should avoid relying solely on native documents that are not suited to future French requirements. A connected app to an approved platform or a compatible solution makes it easier to manage structured data, VAT rates, and order statuses.
Managing hybrid B2B and B2C e-commerce sites
Hybrid stores are the most delicate to secure. The same product listing can be purchased by an individual, a French small business, an association, or a foreign company.
The site must therefore become a sorting hub. From the moment of ordering, it must identify the buyer, determine the applicable regime, and send the data through the right channel.
| Customer type | Key data | Main flow | Recommended processing |
|---|---|---|---|
| French company | Valid SIRET | E-invoicing | Transmission to the approved platform for issuance of an electronic invoice |
| French individual | Identity and address | E-reporting | Invoice accessible to the customer and transmission of sales data |
| European company | Intra-community VAT number | E-invoicing and international format by country | Verification of the expected format, especially via Peppol if necessary |
| Customer outside the European Union | Country, address, and export rules | E-reporting | Transmission of useful data and retention of supporting documents |
The operational rule must remain simple. If no reliable business ID is provided, the customer is treated as an individual, even if that means later regularizing the situation with a credit note and a new invoice.
Anticipating international sales and the Peppol network
An e-commerce site that sells in Belgium, Italy, or other European countries must take local requirements into account. France will require data transmission, but the foreign customer may expect an electronic invoice compatible with their own system.
The Peppol network makes these international exchanges easier thanks to a recognized standard. When choosing an approved platform or invoicing software, compatibility with Peppol becomes an important criterion for European B2B stores.
The ideal workflow is seamless: the site sends the data to the invoicing software, which then transmits it to the approved platform, and the invoice is routed to the correct recipient in an accepted format. This setup avoids manual reprocessing and correction requests.
Set up a reliable architecture between the site, ERP, and accounting
The connection should not be viewed as simply plugging in a module. It must fit into the overall architecture: CMS, payment, inventory, ERP, CRM, accounting, approved platform, and customer account area.
For an industrial SME that sells spare parts online, for example, the ERP can remain the source of truth for inventory and invoicing. The site immediately sends validated orders, while the ERP generates the documents and synchronizes the statuses.
In a lighter-weight store, SaaS invoicing software can become the core of the process. The CMS simply transmits paid orders and retrieves the documents to display to the customer.
Technical points to test before going live
An invoicing integration must be tested in real-world scenarios. Simple orders are not enough: you need to simulate complex carts, discounts, cancellations, and partial refunds.
- French B2B order with a valid SIRET
- French B2C order with a standard customer invoice
- European order with an intra-community VAT number
- Order with a discount, promo code, or free shipping
- Refunded order partially after product return
- Credit note automatically generated after cancellation
- Installment payment or deferred collection
- Customer data error causing invoice rejection
DualMedia often intervenes at this stage to audit the flows, secure the APIs, and improve the ordering experience. A successful integration protects both tax compliance, site performance, and the customer relationship.
Avoid common mistakes when connecting to invoicing software
The first mistake is believing that a PDF is enough. A document that is readable by humans does not necessarily meet the structured data requirements expected in future electronic exchanges.
The second mistake is allowing multiple tools to number invoices. The CMS, ERP, and accounting software must follow a single, continuous, and consistent logic.
The third mistake concerns older CMS versions. An outdated PrestaShop or a WordPress overloaded with plugins can make the integration unstable, especially if the code has not been maintained for several years.
In some cases, a website redesign is more rational than piling up fixes. This decision depends on the level of technical debt, order volume, and growth objectives.
Building a project plan to connect your e-commerce site to invoicing software
An effective project starts with mapping the flows. You need to identify B2B, B2C, France, Europe, export, marketplaces, subscriptions, returns, and credit notes.
Next comes the choice of architecture. Management can be handled by the CMS, the invoicing software, the ERP, or a controlled combination, but each responsibility must be clear.
Finally, the testing phase must take place in a staging environment. The scenarios must cover normal orders, error cases, and accounting adjustments.
- Audit sales flows and customer types
- Clean up existing data: SIRET, VAT, addresses, countries
- Choose the invoicing software and the approved platform
- Define the role of the CMS, ERP, and accounting
- Develop or configure the connector
- Test orders, credit notes, refunds, and statuses
- Former the administrative and support teams
- Monitor rejections and adjust the rules after launch
A company that follows this plan transforms a regulatory constraint into a lever for efficiency. Processing times decrease, errors become less frequent, and teams gain visibility.
Our opinion
Connecting an e-commerce site to invoicing software is no longer a technical option reserved for large companies. It is a foundational change for all online stores that want to stay confort, fast, and reliable.
The best choice rarely depends on a single module. It relies on a coherent architecture, clean data, a well-designed checkout flow, and a carefully tested integration.
DualMedia recommends anticipating this project rather than handling it in a rush. A technical audit, UX and accounting review makes it possible to choose the right path between a plugin, API, ERP, approved platform, and possible redesign.
How do you connect your e-commerce site to invoicing software?
The most reliable method is to use a native connector, an API, or a webhook between the CMS and the billing software. The site sends validated orders, then the software generates the invoice, archives it, and optionally sends it back to the customer area.
Why connect your e-commerce site to invoicing software?
This integration automates invoice creation and reduces data entry errors. It also makes it easier to manage VAT, credit notes, refunds, and obligations related to electronic invoicing.
Is a simple PDF enough for e-invoicing?
No, a simple PDF is not enough to meet the requirements of e-invoicing. The invoice must contain machine-readable structured data, for example via Factur-X, UBL, or CII.
Which software should you choose to invoice a WooCommerce store?
The right software depends on order volume, B2B or B2C sales, and accounting needs. For WooCommerce, it is best to choose a solution that is API- or webhook-compatible and capable of handling structured invoices and credit notes.
Can PrestaShop be connected to an approved platform?
Yes, PrestaShop can be connected to an approved platform via a module or API integration. An audit is recommended if the store uses custom development or an older version of the CMS.
Is Shopify compatible with electronic invoicing?
Shopify can be made compatible through specialized apps or connected external solutions. You need to verify that the chosen app supports French rules, structured data, and feeds to an approved platforme.
How to manage B2B and B2C sales on the same e-commerce site?
The site must qualify the customer at checkout. If the customer provides a valid SIRET number, the flow can be processed as B2B; otherwise, the sale is generally handled as a B2C transaction with e-reporting.
Should the checkout flow be modified for e-invoicing?
Oui, le tunnel de commande doit souvent être adapté. Il doit collecter les informations légales utiles, vérifier les données professionnelles et éviter les erreurs avant l’émission de la facture.
What is an approved platform for an e-commerce site?
An approved plateforme is a provider registered with the tax authorities to transmit electronic invoices and certain tax data. It serves as a secure intermediary between the seller, the client, and the tax authorities.
Is an e-commerce site with few B2B sales affected?
Yes, a low volume of B2B sales does not exempt you from the applicable obligations. The size of the company mainly affects the issuance timeline, but the receipt of electronic invoices applies to all companies.
Should the ERP be connected, or should the CMS be connected directly to the billing software?
Le choix dépend de l’organisation interne. Si l’ERP pilote déjà les stocks, les prix et la comptabilité, il peut être le meilleur point central ; sinon, une connexion directe entre le CMS et le logiciel de facturation peut suffire.
Can DualMedia assist with connecting an e-commerce website to invoicing software?
Yes, DualMedia can support the audit, the architecture selection, and the technical integration. The agency works on websites, business applications, e-commerce CMSs, APIs, UX, performance, and redesign when the project requires it.
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