Fiscal subject related
The measure is planned to be implemented by June 2026. The e-invoicing mandate requires businesses to issue, send, and receive invoices electronically for transactions between taxable persons (B2B). B2C transactions are excluded from this mandate, although customers can choose to receive e-invoices or invoices in paper or PDF formats. However, sending an electronic invoice to a final customer (B2C) will only be allowed upon the recipient's agreement.
The proposed law mandates the use of specific e-invoicing formats, including the national e-SLOG standard, any syntaxes complying with the European standard EN 16931, and other internationally recognized formats when agreed upon by both the issuer and recipient in the contract. In addition to e-invoicing, the law proposal establishes an e-reporting obligation. Invoice data must be transmitted to the Slovenian tax authorities (FURS) in the e-SLOG standard within 8 days from the date of issuing or receiving the invoice. This e-reporting mandate covers domestic transactions as well as intra-community supplies and acquisitions, imports, and exports.
Other news from Slovenia
The VAT Group starts on 01.01.2026 in Slovenia.

Starting January 1, 2026, Slovenia will introduce a voluntary VAT group system allowing closely connected taxpayers to operate under a single VAT identification number, exempting intra-group transactions from VAT. To qualify, taxpayers must meet organizational, economic, and financial connection criteria outlined in Article 5a of the ZDDV-1 and must be established in Slovenia. Read more
TLv6 Implementation Marks Significant Shift in EU’s Trust List Format
A new EU Trust List format, TLv6, will officially replace TLv5 in May 2025 as part of the updated eIDAS Regulation (EU 2024/1183). It introduces key technical changes like a new URI field, updated signature format, and optional phone number support. Organizations must update their systems to avoid signature validation failures and service disruptions, as TLv5 will no longer be valid once TLv6 take... Read more
Slovenia: Update Regarding VAT Reporting and Electronic Invoicing

Starting July 2025, all VAT-registered businesses in Slovenia must submit VAT records to the tax authority (FURS) in a structured digital format. A draft law also proposes mandatory B2B e-invoicing from January 1, 2027, covering all taxpayers and supporting formats like e-SLOG and EN 16931. These changes aim to reduce tax fraud, streamline compliance, and increase transparency through digital repo... Read more
VIDA regulation adopted—what does that mean for business?
The EU adopted the VAT in the Digital Age (ViDA) package on March 11, 2025, introducing major changes to the VAT system starting January 1, 2027. Key reforms include mandatory digital VAT reporting by 2030, new VAT collection rules for online platforms, and expanded One-Stop Shop (OSS) registration to simplify cross-border compliance. Additional measures, such as mandatory e-invoicing, phasing out... Read more
Slovenia: Beginning in July 2025, mandatory VAT reporting and pre-filled VAT returns

Starting July 1, 2025, all VAT payers in Slovenia must provide proof of calculated VAT and VAT deduction, with pre-filled VAT returns introduced under Article 88.d. The Financial Administration's website provides detailed guidelines and technical specifications for submission via the KIR KPR online service. All VAT payers are required to provide proof of calculated VAT and proof of VAT ded... Read more
New document was uploaded: S4F backoffice patch
S4F backoffice patch is intended for users who have already installed S4F backoffice and are intended to update existing installations to latest version. To do so apply only patches that are marked with version number that is newer than your currently installed instance of backoffice. Read more
Slovenia's 2027 B2B E-Invoicing Proposal

Slovenia's new draft law on B2B e-invoicing, submitted in February 2025, postpones the mandate from July 2026 to January 2027 and removes real-time reporting, requiring invoice data submission within eight days via the e-SLOG standard. The proposal mandates ISO/IEC 27001 certification for accredited e-invoicing service providers and recognizes the Peppol network for B2B exchanges. The reform aims... Read more