THE MARKET
Lowest barrier, highest competition
OpenPeppol certification is the only ticket needed. Dozens of APs compete on the same compliance baseline — speed of client ERP onboarding is the only durable edge.
🇧🇪 Belgium · B2B mandate live and enforced
Belgium's B2B mandate is live. Enforcement has started.
Since 1 January 2026, every domestic B2B invoice between Belgian-established VAT taxpayers must be a structured e-invoice — Peppol BIS Billing 3.0 by default. The tolerance period ended 31 March 2026. The long tail of Belgian SMEs is still onboarding, and that is exactly where Access Point providers win or lose.
1 Jan 2026
domestic B2B e-invoicing became mandatory
31 Mar 2026
tolerance ended — fully enforced since 1 April
2028
near-real-time e-reporting planned (5-corner evolution)
€1.5–5k
graduated fines per offence
01 The mandate at a glance
What the law actually says.
Last verified · 10 June 2026
Authority
FPS Finance + FPS BOSA
FPS Finance owns the VAT rules (guidance of 2 Dec 2025); FPS BOSA runs the Peppol infrastructure (Mercurius for B2G, Hermes).
Legal basis
Law of 6 February 2024
Amending the Belgian VAT Code to require structured electronic invoices for domestic B2B.
Model
4-corner Peppol exchange
No clearance, no real-time reporting today. Near-real-time e-reporting (5-corner) planned for 2028.
Format
Peppol BIS Billing 3.0
EN 16931, no national CIUS. Other EN 16931 formats allowed by mutual agreement — Peppol receivability stays mandatory.
Who's affected
Belgian-established VAT taxpayers, domestic B2B
Non-established foreign VAT registrants are excluded (clarified Dec 2025).
Penalties
€1,500 → €3,000 → €5,000
Graduated fines for lacking the technical means to send/receive; non-compliant invoices can also jeopardize VAT deduction.
02 Rollout timeline
From law to enforcement.
6 February 2024
Law adopted Done
The Belgian VAT Code is amended to mandate structured B2B e-invoicing, building on the established B2G Peppol infrastructure (Mercurius).
2 December 2025
Final guidance published Done
FPS Finance publishes its FAQ and clarifications — including the exclusion of non-established foreign VAT registrants.
1 January 2026
B2B mandate live Done
Structured e-invoices become mandatory for domestic B2B between Belgian-established VAT taxpayers — Peppol BIS Billing 3.0 by default.
1 Jan – 31 Mar 2026
Tolerance period Ended
No sanctions for taxpayers able to demonstrate reasonable, timely compliance efforts. Since 1 April 2026, the graduated penalty regime applies in full.
2028 (planned)
Near-real-time e-reporting Planned
Belgium plans to add a 5-corner e-reporting layer, replacing the annual client listing — moving the market toward the CTC pattern already live in the Gulf.
03 For service providers
Open market,
brutal long tail.
Belgium needs no national accreditation — any OpenPeppol-certified Access Point can compete. That makes the differentiator pure execution: how fast you can onboard the hundreds of thousands of SMEs whose accounting systems were never built for structured invoicing.
THE TAIL
A fragmented ERP landscape
Odoo, Exact, Yuki, Teamleader, legacy Sage installs, and a long tail of bookkeeping tools — Belgian SMEs run everything. Five integration patterns reach all of it without custom projects.
THE HORIZON
2028 is already on the roadmap
When Belgium adds near-real-time e-reporting, PeppolBridge ships it as a rule-pack update — your client integrations don't change. That's the point of a country-agnostic layer.
04 How it plugs in
Same platform. Belgium rule-pack on top.
Extraction and validation are identical in every market we serve. For Belgium, the rule-pack emits Peppol BIS Billing 3.0 and validates EN 16931 business rules before anything reaches your Access Point.
Client ERPs40+ connectors
→PeppolBridgecanonical model + BE rule-pack → BIS Billing 3.0
→Your Access PointOpenPeppol AP · C2–C3
→Buyer's AP+ e-reporting 2028
BELGIUM'S 4-CORNER FLOW TODAY — WITH THE 2028 E-REPORTING CORNER ALREADY IN THE RULE-PACK ROADMAP.
05 Built for the local ERP landscape
The systems your clients run.
OdooExactYukiSAPMicrosoft DynamicsNetSuiteSageXeroQuickBooksTeamleader
06 Belgium FAQ
What AP providers and CFOs ask us.
It applies to domestic B2B transactions between Belgian-established VAT taxpayers. Foreign businesses that are VAT-registered in Belgium but not established there are excluded (clarified by FPS Finance in December 2025). B2G e-invoicing via Mercurius was already required earlier.
Peppol BIS Billing 3.0 (EN 16931, no national CIUS) over the Peppol network is the default. Trading parties may mutually agree on another EN 16931-compliant format — but every business must still be able to receive via Peppol.
No. Unlike the UAE (FTA ASP accreditation) or Malaysia (MDEC), Belgium relies on the standard OpenPeppol certification regime. Any certified Access Point can serve Belgian clients — which is why execution speed, not paperwork, decides this market.
From 1 January to 31 March 2026, taxpayers demonstrating reasonable compliance efforts were not sanctioned. Since 1 April 2026, the graduated fines apply: €1,500 for a first offence, €3,000 for a second, €5,000 for each subsequent offence — and non-compliant invoices can put VAT deduction at risk for the buyer.
Belgium plans to introduce near-real-time e-reporting — a 5-corner model in which transaction data also flows to the tax administration, replacing the annual client listing. For PeppolBridge partners this lands as a rule-pack update, not an integration project.
Graduated administrative fines of €1,500 / €3,000 / €5,000 for failing to have the technical means to issue or receive structured e-invoices, applied per offence with escalation for repeat non-compliance. Separately, invoices that don't meet the structured-format requirement can jeopardize the buyer's right to deduct VAT.
Sources & verification — last checked 10 June 2026
- European Commission — eInvoicing in Belgium (Digital Building Blocks) — ec.europa.eu
- FPS Finance — E-invoicing for enterprises — finance.belgium.be
- Marosa — "E-invoicing B2B Belgium: complete guide January 2026" — marosavat.com
- Vertex — "Belgium's 2026 e-invoicing regulations explained" — vertexinc.com
- Tradeshift — Belgium B2B mandate tolerance period — tradeshift.com
This page summarizes regulation for general guidance and is not legal or tax advice. Rules are set by FPS Finance and may change — always confirm against official publications.
07 European expansion
Belgium is live. France lands Sep 2026, Germany Jan 2027. One connector layer, not three projects.
Every EU mandate shares the EN 16931 backbone. Partners who built on PeppolBridge for Belgium get France and Germany as rule-pack additions — see the mandate radar.