From 1 Jan 2027, companies
must receive
e-invoices.
Meet the legal obligation in 2 minutes. Activate a free Peppol mailbox and prepare your company for structured XML invoices.
Connect your ERP to the Peppol network in just a few days with ePošťák Connector.
1 Jan 2027, 00:00 — mandatory B2B e-invoicing for VAT payers in Slovakia under Act 385/2025
Peppol Box free for everyone
Peppol Box works like Gmail, but instead of emails you receive e-invoices. You can set up your Peppol Box with us completely free. Receiving in the web interface is free within the Free program limits (500 received and 5 sent invoices per month).
Fig. 01 · ePošťák web interface — invoice overview with KPI cards
Click to enlarge
Receipt obligation covered
Receive e-invoices through a certified Peppol Access Point and prepare your company for the new B2B obligation from 1 Jan 2027.
Send without retyping
Photograph an invoice, upload a PDF, or import an accounting export and we prepare it for sending through Peppol.
Create invoices in the mailbox
Issue a standard invoice, self-billing invoice, reverse-charge invoice, or correction document without a separate tool.
1.3M company registry contacts
Enter the company ID, fill details from the registry, and save the partner as a reusable contact for future invoices.
Dark Mode for late work
When invoices wait until evening, switch the whole mailbox into dark mode.
Frequently Asked Questions
An e-invoice is an invoice in structured XML format (EN16931, UBL) that your accounting software processes automatically. Unlike PDFs or scanned invoices, it contains machine-readable data — no manual data entry, reduced error risk.
Source: FAQ of the Financial Administration of the Slovak Republic →Per Act No. 222/2004 Coll. on VAT (§ 85o), from January 1, 2027, all VAT payers must send and receive e-invoices for domestic B2B and B2G transactions. This applies to every legal entity and entrepreneur — freelancers, LLCs, lawyers, architects, and property lessors. The transition period runs from January 1, 2026. International e-invoicing (ViDA) is planned from 2030.
Use the provider selection link on the Slovak Financial Administration portal, sign in with your Slovak ID card or login ID and password, enter your company details, and select Kaja Solutions s.r.o. (ePošťák). Then click the activation link sent by email and finish registration on our website.
Yes, receiving in the web interface is free within the Free program limits (500 received and 5 sent invoices per month). You pay for sending, API, automated, or bulk integration use according to the current price list.
Penalties can reach up to €10,000 for unreported or incorrect data, or for missing the deadline. Repeat violations can go up to €100,000. If you correct an honest mistake promptly or a provider failure occurs, the outcome depends on the Financial Administration's assessment and the evidence available.
Peppol is a European network for secure exchange of electronic documents between businesses (B2B) and public institutions (B2G). In Slovakia, the Peppol Authority is the Financial Directorate of the Slovak Republic, responsible for accrediting service providers (Access Points) and managing national rules.
No. If your software supports Peppol, just connect it to a digital mailbox provider. If not, you can create invoices directly in ePošťák or through our API. No specific software is required — just a digital mailbox provider.
Free, Standard, and Business plans have no monthly fee in the regular web interface until 31 Dec 2026. From 1 Jan 2027 they are billed according to the current price list. API, Connector, and integration use follow separate pricing.
View pricing →Meet the obligation to receive e-invoices
From 1 Jan 2027, companies must be able to receive e-invoices via Peppol. Activate a free mailbox and be ready before everyone starts rushing.
Enter basic company details.
Complete the short verification and mailbox confirmation.
After activation, you can receive e-invoices in Peppol Box.