In construction, thousands of invoices move daily between main contractors, subcontractors and clients — often across borders and formats. eConnect connects the chain via Peppol BIS and EN 16931, with automatic transformation to sector or country formats where needed.
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Construction networks need one integration that covers Peppol delivery, EN 16931 validation and country-specific rules. eConnect transforms between Peppol BIS and local sector formats automatically. In the Netherlands that includes DICO SALES005 (mandatory in the Dutch construction sector since 1 January 2022), G-accounts and reverse-charge VAT — handled as locale depth, not as the international lead. Deep embedding through partners such as 4PS and VanMeijel.
Standard construction e-invoices via Peppol BIS / EN 16931. One Access Point for domestic and cross-border contractor–client flows.
Automatic transformation between Peppol and sector formats (including DICO SALES005). Every party in the chain receives the format they expect.
DICO-certified since 2019 with full support for the Dutch construction SALES005 standard — available when your chain uses DICO.
Automatic recognition and processing of G-account invoices. The IDR recognises G-account IBAN numbers (the characteristic "099" sequence) on PDF invoices and includes them as a separate field in the e-invoice.
In subcontracting, reverse-charge VAT is common. eConnect recognises it automatically and applies the correct VAT code (AE) in accordance with EN 16931 (and NLCIUS where required).
Automatic enrichment with GLN codes (13-digit GS1 address codes). Invoices are linked to the correct delivery address in the chain.
The IDR (Intelligent Document Recogniser) converts PDF invoices to e-invoices, including recognition of order slips as references. Line recognition automatically splits invoice lines.
Peppol-first construction invoicing, with sector extras (DICO, G-account, reverse-charge) where the local chain requires them.
eConnect works closely with the leading software vendors in the construction industry.
4PS is the sector partner for construction, civil engineering and building services. 4PS Construct runs on Microsoft Dynamics 365 Business Central and integrates via native API connection keys with eConnect. The integration supports Peppol, DICO and other procurement networks.
VanMeijel Automatisering has been a partner since 2023, with a strong position in the civil engineering and infrastructure sector. Through VanMeijel, 67 organisations have been onboarded, processing approximately 80.000 invoices per month via PDF (OCR/IDR) and approximately 5.000 per month via XML/Peppol.
How KVK, with AFAS, supplier activation, and Peppol, reached 32.6% e-invoices in a few months and is further digitizing the finance process.
DICO is the Digital Information Platform for the Construction Sector and defines the standard for e-invoicing in the Dutch construction industry.
The DICO SALES005 format has been the mandatory standard format for e-invoices in the construction sector since 1 January 2022. This format contains sector-specific fields that are not part of the standard Peppol BIS 3.0 structure, such as order slip references, G-account details and chain liability information. Without DICO support, invoices in the construction chain cannot be exchanged correctly.
The eConnect platform is DICO-certified and transforms invoices automatically between Peppol BIS 3.0 and the DICO SALES005 format. This means it does not matter whether the sender or receiver uses Peppol or DICO: every party receives the invoice in the format their system expects. Additionally, the platform automatically enriches invoices with GLN codes (13-digit GS1 address codes), so invoices are linked to the correct delivery address in the chain.
The combination of DICO certification with automatic G-account recognition and reverse-charge VAT makes the platform suitable for the entire construction chain, from main contractor to subcontractor and client.
A G-account (blocked account) is a bank account on which the client deposits the estimated amount of payroll taxes and VAT, as protection against liability in subcontracting.
The platform automatically recognises G-account IBAN numbers on incoming PDF invoices. The identifier is the '099' sequence in the IBAN number, which is standard for G-accounts. The IDR (Intelligent Document Recogniser) detects this pattern and includes the G-account IBAN number as a separate field in the e-invoice via the NLCIUS G-account extension. This is a Dutch extension to the European EN16931 standard, specifically designed for this situation.
The receiving software package can then process two partial payments: one to the G-account (payroll taxes and VAT) and one to the regular bank account of the supplier. The prerequisite is that the receiving package supports G-account processing. Most construction software (including 4PS Construct) has this functionality built in.
G-account processing is not only relevant for construction: in the staffing industry and at housing associations (subcontracting for maintenance and renovation), the G-account is a commonly used instrument to limit liability risk.
In construction subcontracting, the reverse VAT charge applies, meaning the main contractor pays the VAT instead of the subcontractor.
This reverse charge is legally required for construction and installation work and must be correctly reflected in the invoice to avoid problems with the Dutch Tax Authority. The IDR (Intelligent Document Recogniser) automatically detects reverse-charge VAT on incoming PDF invoices. It recognises the combination of a 0% VAT rate with a reverse-charge indication on the document and automatically applies VAT code AE in accordance with the EN16931/NLCIUS standard.
For e-invoices received via Peppol, the reverse-charge VAT is already structured in the UBL message. The platform validates the VAT codes and warns of deviations. For PDF invoices, the IDR performs the recognition and classification, so the invoice is correctly processed in the financial system in both cases without manual intervention.
In addition to the standard reverse-charge VAT (code AE), the IDR also recognises intra-community reverse charge (code K) and export deliveries (code G), which is relevant for international construction projects.
Under the Dutch Chain Liability Act (WKA), a main contractor can be held liable for the payroll taxes and turnover tax that a subcontractor fails to remit to the Dutch Tax Authority.
This risk applies throughout the entire construction chain: every link can be held liable for the links below it. The G-account is the primary instrument to limit this risk. By depositing the estimated amount of payroll taxes and VAT into the subcontractor's blocked G-account, the main contractor can demonstrate compliance with its obligations. The remaining invoice amount goes to the regular bank account.
The platform processes this split automatically. For incoming PDF invoices, the IDR recognises the G-account IBAN number (the '099' sequence) and includes it as a separate field in the e-invoice via the NLCIUS G-account extension. The receiving system can then create two partial payments. As additional risk mitigation, the client can request a Payment Conduct Declaration from the Dutch Tax Authority, confirming that the subcontractor is meeting its payment obligations.
Correct processing of WKA-related invoices prevents errors from only surfacing during an audit, when the financial consequences can be significant.
Yes, both are official partners with a proven integration that processes large volumes daily.
4PS Construct runs on Microsoft Dynamics 365 Business Central and integrates via native API connection keys with the platform. The integration supports both Peppol BIS 3.0 and the DICO SALES005 format as well as other procurement networks. Invoices flow automatically to and from the 4PS system, including G-account details and reverse-charge VAT.
VanMeijel Automatisering has been a partner since 2023 and has a strong position in the civil engineering and infrastructure sector. Through VanMeijel, 67 organisations are connected to the platform, processing approximately 80.000 invoices per month via PDF (IDR) and approximately 5.000 per month via XML/Peppol. The integration runs via the PSB REST API and the IDR for PDF conversion.
If you already work with one of these packages, the integration can be set up quickly via a Remote Starter session of approximately two hours. For standard integrations, this is handled by the Support team. For other construction software, integration via the REST API is possible.
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