E-invoicing mandate 2026: What Belgian businesses need to know

E- invoicing: background and benefits

The e-invoicing legislation and its implementation have been in the making for over a decade.

Authorities have been working in this direction for years due to the various benefits e-invoicing offers for businesses and the government.

By creating more transparency in financial transactions, e-invoicing helps to reduce tax losses and tackle fraud, as authorities can monitor and track transactions more effectively. In early adopter countries such as Italy and Poland, increased transparency already yielded positive results. E-invoicing has helped improve tax compliance, enforcement, and subsequent collection.

E-invoicing does not only benefit governments; it simplifies processes for businesses by enabling digitized and automated invoicing. This shift reduces manual work, making invoicing faster and more efficient—especially for companies operating across borders.

Recognizing these advantages, the EU introduced Directive 2014/55/EU to create a standardized approach to e-invoicing in public procurement, paving the way for broader adoption and a more transparent digital economy.

Regulatory timeline

• 2014: The European Commission issues Directive 2014/55/EU on e-Invoicing in public procurement
• 2017: Publication of the European Commission Standards for e-Invoicing (EN 16931)? In Belgium, the Flemish government makes B2G e-Invoicing mandatory for public procurement.
• 2019: The Belgian federal law on public procurement of 7 April 2019 transposes the EU Directive 2014/55/EU, which obliges European public sector administrations to receive and process e-invoices compliant with the European e-Invoicing standard. Regionally, Flanders mandated e-invoicing for suppliers in 2017, and the Brussels government will follow in 2020.  Italy B2B Requirement. Italy is the first EU country to make B2B e-Invoicing mandatory starting in January 2019.
• 2020: The Brussels regional government makes B2G e-invoicing mandatory for its public sector procurement.
• 2021: One-Stop-Shop (OSS). The EU introduces the One-Stop-Shop VAT system in July 2021, simplifying VAT for cross-border e-commerce transactions.
• 2022: The European Commission introduces VAT in the Digital Age (ViDA) package, submitting the proposal in December. In Belgium, Wallonia requires B2G e-invoicing for public procurement. VAT In The Digital Age is a broad initiative focused on modernizing VAT processes across Europe. Beyond just e-invoicing, it aims to create a more streamlined, digitalized VAT framework that enhances transparency and compliance in the digital economy.
• 2024: On February 1, the Belgian federal parliament passes a law mandating domestic B2B e-invoicing, effective January 1, 2026.
• 2027 – Single VAT Registration: This regulation will allow businesses to register for VAT in a single EU country, simplifying cross-border transactions by reducing the need for multiple VAT registrations across member states.
• 2030 – Platform Economy compliance: This legislation ensures VAT compliance in the platform economy, requiring digital platforms to report sales and VAT details to tax authorities, particularly for goods and services sold through online marketplaces.
• 2030/35 – Digital Reporting Requirements: By 2035, this initiative aims to implement real-time digital reporting across the EU, making transaction data immediately available to tax authorities, further reducing VAT fraud and improving compliance efficiency.

Challenges of Implementing E-Invoicing

Implementing e-invoicing within an organization is a complex process that goes beyond legal compliance. Successful e-invoicing needs more than just meeting legal requirements in an isolated finance process; it most likely will cause changes in IT, master data, procurement, and sales. Organizations with extensive geographical reach or complex IT architectures face additional hurdles.

Let’s check out the main challenges and consequences of e-invoicing adoption.

1. The Finance department: Enabling data-driven invoicing with vendors and suppliers

For finance teams, the transition to e-invoicing is closely tied to two critical processes: purchase-to-pay (P2P) and order-to-cash (O2C). Companies that implement e-invoicing must be able to handle invoices in a structured data format. Invoices will be received or sent through an approved e-invoicing platform, such as the Open Peppol network. This requires fully integrated, end-to-end processes to maintain a seamless invoicing flow.

A few key considerations for finance teams include:

• End-to-end process digitalization: e-invoicing requires robust, digitalized P2P and O2C processes that capture, process, send, and store invoice data accurately.
• Preserving the record-to-report cycle: when implementing e-invoicing, preserving accurate invoice encoding and cost allocation within the record-to-report (R2R) process is critical. Companies currently rely on Optical Character Recognition (OCR) systems to interpret invoices and allocate costs. With e-invoicing, these business rules must be translated into a data-driven format to avoid manual re-coding or cost-splitting errors. Alignment with vendors and customers is advised to maintain consistent business logic, similar to that installed with the OCR invoice processing functionality.

2. Master data management: Ensuring accuracy and governance

A successful e-invoicing implementation depends on high-quality master data that feeds into invoices and other related documents. Inaccurate or outdated master data will lead to errors and increased manual intervention, undermining the efficiency that e-invoicing promises to deliver. Therefore, organizations must establish rigorous data governance processes that enhance data quality, reduce errors, and support seamless invoice exchanges.

3. IT tools: Building a reliable and scalable system

E-invoicing requires an IT infrastructure that supports integrated data flows across vendors, internal systems, and customers. The selected tools and systems should address the business’s immediate needs while allowing for future scalability and growth. Organizations must evaluate their existing tools to ensure their compatibility with e-invoicing platforms.

4. Procurement and Sales: supporting P2P and O2C processes

Procurement and Sales support the P2P and O2C processes that underpin e-invoicing. These departments must ensure accurate, timely, clear actions and communication with suppliers and customers.

Benefits of implementing e-invoicing

Implementing e-invoicing comes with significant challenges, but the benefits often outweigh the investment. Beyond ensuring compliance, e-invoicing boosts operational efficiency, supports better decision-making, and strengthens relationships with clients and employees. Below are some key advantages.

1. Cost efficiency through automation and process optimization

E-invoicing introduces streamlined, transparent, and automated end-to-end (E2E) processes, reducing the need for manual intervention. By digitizing and optimizing invoicing processes, companies will lower operational costs, minimize human errors, and achieve higher levels of efficiency. This approach supports operational excellence, enabling teams to allocate their time to higher-value tasks that drive further innovation and efficiency.

2. Compliance confirms business credibility

Achieving compliance with e-invoicing regulations positions an organization as a responsible and reliable business partner. Many suppliers, customers, and partners value organizations that meet legal requirements, which can foster trust and long-term business relationships. Compliance demonstrates that the organization is committed to data accuracy, transparency, and reliable operations.

3. Data-driven insights for better decision-making

Digital invoicing produces valuable and structured data that can be leveraged for real-time insights and enhanced decision-making. With digital records of financial transactions readily available, finance and management teams can analyze trends, detect inefficiencies, and make data-backed decisions to improve business performance. This data-centric approach empowers organizations to stay competitive.

4. Improving customer and employee satisfaction

E-invoicing not only benefits the organization but also enhances customer and employee satisfaction. Accurate and timely invoicing improves the customer experience by minimizing errors and delays, ensuring a smooth and seamless payment process.

Meanwhile, employees gain the advantage of reduced manual workload and simplified processes, which can lead to increased job satisfaction and productivity. By automating routine tasks, employees can focus on more strategic activities that contribute to personal and organizational growth.

Implementing e-invoicing presents challenges but offers significant benefits. It requires coordination across departments like Finance, Procurement, Sales, IT, and master data teams to ensure compliance and integrate end-to-end processes. However, the advantages likely outweigh the costs. E-invoicing improves operational efficiency, reduces manual tasks, and supports compliance. It helps position the company as a reliable business partner.

The adoption of e-invoicing offers substantial benefits beyond compliance. Automated and optimized invoicing processes lead to cost efficiencies, real-time data insights, and improved decision-making. Additionally, more accurate and timely processes lead to improved customer and employee satisfaction. By investing in the right tools to maximize data-driven insights, organizations can build a scalable, future-proof invoicing system. This system not only strengthens operational performance but also supports strategic growth and competitive advantage. Embracing e-invoicing is, in the end, an investment in a digitally empowered future.