e-Invoice
Electronic Invoice (e-Invoice)
A structured electronic invoice in XML/UBL format that can be processed automatically without manual re-keying.
What is an e-Invoice?
An e-Invoice (electronic invoice) is an invoice issued in a structured electronic format — typically XML based on the EN 16931 standard and the UBL 2.1 or CII formats — which enables fully automatic processing on the recipient’s side without manual re-keying or OCR extraction. A PDF invoice sent by email is NOT an e-Invoice in this sense — an e-Invoice has machine-readable content.
At EU level, e-Invoicing is based on Directive 2014/55/EU, which introduced mandatory acceptance of e-invoices in public procurement. The European standard EN 16931 defines the data structure. The Peppol network is one of the most widely adopted infrastructures for the secure exchange of e-invoices between companies and public authorities.
In Slovakia, mandatory B2B and B2G e-Invoicing is being prepared by the Financial Administration; the implementation date has been postponed several times and details continue to be updated. Several EU countries (Italy, France, Poland) already mandate B2B e-Invoicing.
When it is used
- In public procurement (B2G) — mandatory since 2020
- In corporate B2B — voluntarily, by agreement with the partner
- In supply chains (automotive, retail) — where the buyer requires EDI/e-Invoice
See the Invoicing module, the Accounting module, and the Document Extraction module.
Related terms
- DPH / VAT — an e-Invoice contains VAT in machine-readable form. See /en/glossary/dph.
- OCR — the technology used for PDF invoices without e-Invoice. See /en/glossary/ocr.
- P2P — the Procure-to-Pay process that e-Invoicing significantly automates. See /en/glossary/p2p.
In Modulario
Modulario supports the issuance and receipt of e-Invoices in XML/UBL formats in the Invoicing module. For incoming invoices, the system either reads the e-Invoice XML directly, or uses Document Extraction (OCR + AI) for PDFs. The result is automatically posted in Accounting.
Modulario can already generate electronic invoices in UBL 2.1 and Factur-X (hybrid PDF+XML for European B2B) and receive e-invoices via Peppol or email. When mandatory e-invoicing is introduced, the entire flow will be fully automatic — with no change to the user interface.
The benefits of e-Invoicing are quantifiable — an EC study estimates savings of 11–64 billion per year across the EU, reduced accounting errors, and faster collection by 5–10 days. For a small company that means dozens of hours saved per month and improved cash flow.
Related terms
DPH
An indirect consumption tax added to the selling price of goods and services — in Slovakia the rates are 23%, 19% and 5% (2025).
eKasa
Slovakia's online cash register system under Act No. 289/2008 — every receipt is sent in real time to the Slovak Financial Administration.
P2P
End-to-end process from raising a purchase requisition, through the purchase order, delivery and invoice receipt, to payment to the supplier.
O2C
The process from receiving a customer order, through invoicing and delivery, to the payment being credited to the company's bank account.
OCR
Technology for recognising text from images or scanned documents — converts pixel data into text that can be further processed.
Related Modulario modules
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