How do I integrate with Belgium accounting software?

Apideck's Unified Accounting API lets you integrate with 10+ Belgium accounting platforms through a single API. Sign up, enable the connectors you need, and use one standardized data model to read and write invoices, payments, contacts, and more.

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Belgium accounting integrations

Q: What accounting software is popular in Belgium?

The most popular accounting platforms in Belgium include Exact Online, banqUP, Odoo, Xero, QuickBooks. Exact Online is the leading cloud accounting platform for Belgian SMEs, alongside Banqup and Odoo (a Belgian company). Winbooks and Billit are popular local alternatives, and structured Peppol e-invoicing has been mandatory for domestic B2B transactions since January 2026.

Exact Online is the leading cloud accounting platform for Belgian SMEs, alongside Banqup and Odoo (a Belgian company). Winbooks and Billit are popular local alternatives, and structured Peppol e-invoicing has been mandatory for domestic B2B transactions since January 2026.

10 supported accounting platforms + 11 on the radar

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Belgium accounting software market

Where the major platforms sit and which Apideck supports today. Figures are company-reported unless marked as an estimate.

1,187,819

VAT-registered enterprises in Belgium as of 31 December 2024

Statbel

Platform	Belgium market position	Apideck	Source
Exact Online	Leading cloud accounting platform for Belgian SMEs, active in Belgium since 1989	Supported	Exact
Winbooks	Over 20,000 customers across Flanders and Wallonia at the time of its 2019 acquisition by Exact	On the radar	Exact
Billit	Growing Belgian invoicing and administration platform built around Peppol e-invoicing compliance	On the radar	Billit

Subscriber and customer counts are the best available public indicators and may include accountant-managed multi-entity accounts; they are not a direct count of distinct businesses. Estimates are marked accordingly.

Belgium accounting compliance requirements

Belgian accounting compliance requires structured Peppol e-invoicing for domestic B2B transactions as of January 2026, annual accounts filed with the National Bank of Belgium's Central Balance Sheet Office within seven months of financial year-end, and VAT returns filed through the FPS Finance e-invoice and Intervat systems.

Building e-invoicing into your product? Read what Belgium's Peppol mandate needs from your ledger.

Peppol B2B e-invoicing mandate

VAT-registered businesses in Belgium must issue and receive structured electronic invoices over the Peppol network for domestic B2B transactions since 1 January 2026.

FPS Finance (SPF Finances)

E-invoicing penalties

A business that lacks the means to issue or receive structured e-invoices faces a fixed fine of EUR 1,500 for a first infraction, EUR 3,000 for a second and EUR 5,000 for each further infraction. A repeat counts only once the previous infraction has been recorded, at least three months earlier.

Royal decree of 8 July 2025 (Belgian Official Journal)

Annual accounts filing

Companies must submit annual accounts to the National Bank of Belgium's Central Balance Sheet Office within 30 days of approval and at most seven months after the financial year closes.

National Bank of Belgium (NBB)

Record retention

Invoices must be kept for seven years from 1 January of the year after they were issued, and longer for invoices tied to VAT revisions on real estate.

FPS Finance (SPF Finances)