Upcoming
B2B e-invoicing mandatory from 1 January 2028.
| 1 Jan 2015 | B2G e-invoicing mandatory, e-SLOG through UJP |
| 23 Oct 2025 | ZIERDED adopted (Act on the Exchange of Electronic Invoices and Other Electronic Documents) |
| 1 Jan 2028 | B2B e-invoicing mandatory |
Format: e-SLOG, EN 16931 (UBL/CII) or another agreed EN-compliant format
Transmission: Exchange via providers; B2G already runs through UJP
B2G e-invoicing in e-SLOG has been mandatory since 2015 through UJP. The B2B extension arrives on 1 January 2028 under ZIERDED — a date that moved twice, from earlier proposals of 2026 and 2027, so treat it as firm but not immovable. Unlike Italy or Poland there is no clearing platform: exchange is decentralised through e-route providers, direct system-to-system exchange, the international Peppol network, or a free application intended for small businesses, and invoices are NOT reported to the tax authority. That makes 2026-2027 the window in which Slovenian accounting software has to be made e-SLOG and EN 16931 capable.
Validate a Slovenia invoice against the profile that applies here — EN 16931 (core).
See a worked example → · Upload your own →
This country also has its own national format. Validate an e-SLOG 2.0 invoice →
Nothing is stored, and the whole invoice is checked, not just this rule. A PDF only works if it is Factur-X / ZUGFeRD — a PDF with the invoice XML inside it.