Top 5 Invoicing Software for Belgium in 2025

Belgium is rapidly modernizing its financial infrastructure with a clear shift towards digitalization. For founders and SMBs, choosing the right invoicing software is no longer just about efficiency—it is about legal compliance. With the upcoming mandatory B2B e-invoicing regulations, businesses must adopt tools that integrate seamlessly with the Peppol network.

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Below is a guide to the regulatory landscape and the top European-built software to help you stay compliant.

E-Invoicing Regulations in Belgium

Belgium has set a definitive timeline for the mandatory adoption of structured electronic invoicing (e-invoicing) for Business-to-Business (B2B) transactions.

Key Mandates

• January 1, 2026: Mandatory structured e-invoicing applies to all B2B transactions between VAT-registered Belgian entities.
• Peppol Network: The standard delivery method for these invoices is the Peppol network (using the UBL format). Emailing PDFs will no longer be sufficient for legal compliance in B2B contexts after the deadline.
• B2G Mandate: Electronic invoicing is already mandatory for suppliers of public entities (Business-to-Government).

Businesses should look for software that acts as a Peppol Access Point or integrates directly with one to ensure seamless transmission of compliant invoices.

Official Source: Federal Public Service Finance - E-invoicing

Top 5 Invoicing Software for Belgium

1. Odoo Accounting

Odoo is a massive open-source success story born in Belgium. It is an all-in-one suite that manages everything from accounting and inventory to CRM and website building. For businesses looking for a complete ERP solution rather than just a standalone invoicing tool, Odoo is a top-tier contender.

• HQ: Grand-Rosière, Belgium
• Best For: Scaling SMBs and companies needing full business management.

Key Features

• Peppol Integration: Native support for sending and receiving e-invoices via Peppol.
• Bank Synchronization: Automatically syncs with Belgian banks for easy reconciliation.
• Automated Follow-ups: Configurable triggers for email payment reminders.
• OCR Scanning: AI-powered digitization of vendor bills and receipts.

Pricing Model

• Free Plan: "One App Free" model allows you to use the Accounting module for free indefinitely.
• Standard/Custom: Paid plans available for access to multiple apps and advanced customization.

2. Teamleader

Headquartered in Ghent, Teamleader is a market leader in Belgium for work management software. It combines CRM, project management, and invoicing into a single platform. It is particularly popular among agencies, consultants, and service-based businesses.

• HQ: Ghent, Belgium
• Best For: Service businesses, agencies, and project managers.

Key Features

• Invoice from Projects: Convert time tracking and project costs directly into invoices.
• Peppol Compliance: Fully ready for the 2026 mandate with built-in e-invoicing capabilities.
• CRM Integration: Seamless link between customer data, quotations, and final invoices.
• Subscription Management: Tools for handling recurring invoices and subscriptions.

Pricing Model

• Free Trial: Available.
• Tiered Pricing: Quarterly or yearly subscriptions based on feature depth (Smart, Move, Boost).

3. Billit

Billit is a digital invoicing platform explicitly designed to bridge the gap between entrepreneurs and accountants. As a certified Peppol Access Point, Billit focuses heavily on the technical compliance aspect of invoicing, making it a safe bet for the upcoming regulations.

• HQ: Ghent, Belgium
• Best For: SMEs focusing on digitalization and collaboration with accountants.

Key Features

• Peppol Access Point: Direct connection to the Peppol network for sending/receiving UBL invoices.
• Digital Archive: Cloud-based storage for all financial documents, accessible by your accountant.
• CODA Files: Automated processing of bank statements.
• UBL Conversion: Converts PDFs to UBL format using OCR technology.

Pricing Model

• Freemium: Free version available for starters (limitations apply).
• Subscription: Monthly plans based on the volume of documents processed.

4. Accountable

Designed specifically for the self-employed (indépendants) and freelancers in Belgium, Accountable is a mobile-first solution that acts as a tax coach. It simplifies compliance by providing real-time tax estimates alongside invoicing features.

• HQ: Brussels, Belgium
• Best For: Freelancers, sole traders, and consultants.

Key Features

• Tax Optimization: Real-time visibility on VAT to pay and social contributions.
• Mobile App: Create and send invoices directly from a smartphone.
• Bank Connection: Links with Belgian banks to match payments with invoices automatically.
• Peppol Ready: Supports the creation and import of e-invoices.

Pricing Model

• Free Version: Basic invoicing features available for free.
• PRO Plans: Monthly or yearly subscriptions for full tax features and bank connectivity.

5. MyFlexina

MyFlexina is a streamlined invoicing and business management tool tailored for Belgian entrepreneurs. It focuses on ease of use and compliance, ensuring that small business owners can manage their administration without a steep learning curve.

• HQ: Belgium
• Best For: Small businesses and self-employed professionals.

Key Features

• Peppol Compliance: Built-in functionality to create and send electronic invoices.
• Stock Management: Basic inventory tracking integrated with invoicing.
• Client Portal: Allows customers to view and pay invoices online.
• Expense Tracking: Simple tools to log and categorize business expenses.

Pricing Model

• Free Trial: Available.
• Subscription: competitive monthly pricing tiers.

Explore More Options

Looking for a broader range of tools? Browse the full directory of Invoicing & Accounting Software for Belgium