
Electronic invoicing in Portugal: What you need to know going into 2026
Portugal’s e-invoicing framework is evolving, with mandatory structured invoices in B2G and regulated flexibility in B2B. We explain key concepts, formats like CIUS-PT and UBL 2.1, the role of e-Fatura and the Portuguese Tax Authority, and what businesses need to know about PDFs, ATCUD, QR codes, and upcoming deadlines through 2026 and beyond.

















