Slovenia has required e-invoices for invoices to public bodies since 1 January 2015, sent through the Public Payments Administration (UJP). Between businesses, the ZIERDED Act published in December 2025 makes e-invoices mandatory from 1 January 2028 for supplies in Slovenia. The national format is e-SLOG 2.0, which follows EN 16931.
This page summarises the European Commission's country sheet for Slovenia, checked on 5 November 2026. It is not tax advice; your računovodja can tell you how the rules apply to you.
What applies to whom?
| Obligation | Who | From | Channel | Status | Source |
|---|---|---|---|---|---|
| Send e-invoices to public bodies (B2G and G2G) | Suppliers to budget users | 1 January 2015 | UJP e-invoicing system | in force (now the Act on Payment and Public Financial Services of November 2025) | European Commission |
| Exchange e-invoices between businesses (B2B and G2B) | Entities in the Slovenian Business Register and individuals carrying on a business activity, for supplies in Slovenia | 1 January 2028 | not yet detailed | enacted (ZIERDED, December 2025) | European Commission |
| Issue e-invoices to consumers | Businesses | none | no obligation | European Commission |
Slovenia has no real-time reporting system for invoices. Klarbon has not confirmed the 2028 date from a Slovenian official source, so check the Financial Administration (FURS) or UJP for implementing rules (European Commission).
How are e-invoices sent to public bodies?
You submit e-invoices to the UJP e-invoicing system by hand in its web portal, or automatically through certified service providers or bank networks. UJP is the central gateway for B2G and G2G invoices and supports cross-border invoices over Peppol through its exchange hub (European Commission).
Which formats are used?
| Format | Used for | Notes |
|---|---|---|
| e-SLOG 2.0 | invoices to public bodies and between businesses | national standard following EN 16931, with some national extensions |
| Peppol BIS Billing 3.0 | cross-border invoices | a UBL format |
Slovenia is working on a national CIUS to match its VAT rules and business practice.
What can Klarbon do with Slovenian invoices?
| You want to | Tool | Limit |
|---|---|---|
| Read a Peppol BIS or UBL invoice | open a Peppol invoice, free | e-SLOG is not supported |
| Check a file against EN 16931 | check an e-invoice | not the e-SLOG rules |
Klarbon does not send invoices to UJP.
Related
E-invoicing deadlines by country
| Country | Scope | Obligation | From | Who | Source |
|---|---|---|---|---|---|
| Slovenia | B2G | Send | To be confirmed | Suppliers invoicing budget users through the public payments system. | Official source |
| Slovenia | B2G | Receive | In law | Contracting authorities and entities covered by Directive 2014/55/EU for in-scope public procurement invoices conforming to EN 16931. | Official source |
| Slovenia | B2B | Send | To be confirmed | Covered domestic supplies between business entities registered in Slovenia. | Official source |
Frequently asked questions
Is e-invoicing mandatory in Slovenia?
For invoices to public bodies, yes, since 1 January 2015, through the Public Payments Administration (UJP). Between businesses, the Act on the Exchange of Electronic Invoices and Other Electronic Documents (ZIERDED), published in December 2025, makes e-invoices mandatory from 1 January 2028.
Who is covered by the Slovenian B2B mandate from 2028?
According to the European Commission, all entities registered in the Slovenian Business Register and individuals carrying on a business activity, for B2B and government-to-business supplies of goods and services in Slovenia.
What is e-SLOG?
e-SLOG is Slovenia's national e-invoice standard. Version 2.0 complies with the European standard EN 16931 and adds some national extensions.
How do I send an e-invoice to a Slovenian public body?
Through the UJP e-invoicing system, by hand in its web portal or automatically through certified service providers or bank networks. Cross-border invoices can arrive over Peppol.