Saudi Arabia has rolled out a comprehensive e‑invoicing mandate led by ZATCA, requiring all companies to issue and transmit electronic invoices via the Fatoora platform. The phased implementation includes mandatory clearance for B2B/B2G and e‑reporting for B2C, with progressive waves based on turnover thresholds. As of March 31, 2026, companies with annual turnover above SAR 750 000 must comply, with further thresholds set for June 2026.

The European Commission is advancing a deemed supplier regime for ride‑and‑accommodation platforms, with a voluntary launch in July 2028 and mandatory compliance by 1 January 2030. Draft explanatory notes were issued in Q1 2026, with final notes expected in Q2 2027, and the EC will confirm member‑state conditions by 31 December 2028. The regime also revises the short‑term accommodation definition to 30 days and will be evaluated for effectiveness by 1 July 2033.

Mexico’s tax authority, SAT, has introduced Rule 2.9.21, requiring digital service providers and marketplace platforms to grant direct, real‑time access to transaction data. The rule, effective April 1 2026, imposes a final deadline of April 30 2026 for submitting a Notice of Access. The mandate targets a wide range of digital businesses, including foreign operators, and presents significant technical challenges due to the lack of published API specifications.

Spain has introduced mandatory B2B e‑invoicing under Royal Decree 238/2026, effective from 31 March 2026 but operationally deferred until the public e‑invoicing platform regulation takes effect. The decree sets phased implementation: large businesses with turnover over €8 million must comply within 12 months, while all other businesses follow within 24 months. It also imposes strict invoice status reporting within four calendar days and allows four electronic formats.

Slovakia will enforce mandatory B2B e-invoicing via the Peppol network from 1 January 2027 under Law 385/2025 Z.z., following a voluntary testing period in 2026. All e-invoices must use the EN 16931 XML standard (UBL 2.1 or CII), be issued within 15 days, and reported within 5 days, with penalties up to €10,000 per infraction and €100,000 for repeated violations.