Portugal has no general B2B e-invoicing clearance mandate, but it has strict digital tax controls. Invoices must be issued through AT-certified software, include ATCUD and QR codes, and be reported monthly via SAF-T Billing. B2G structured e-invoicing is mandatory for all public-sector suppliers, and from 1 January 2027, PDF invoices in B2B and B2C will require a Qualified Electronic Signature. Po... Read more

Portugal has extended the deadline for April 2026 invoice reporting to eight days into May, due to public holidays affecting compliance, allowing businesses to submit without penalties. Portugal has announced a short extension for reporting April invoice data, following the impact of public holidays at the start of May 2026.As May 1 is a public holiday, followed by a weekend, businesses effectivel... Read more

Portugal has temporarily extended the deadline for submitting March 2026 invoice notifications to April 8, 2026, allowing businesses to report invoices to the Portuguese Tax Authority without penalties due to the Easter holiday period. The Portuguese government has announced a temporary adjustment to invoice notification deadlines due to the Easter holiday period. Recognizing that many citizens ar... Read more

Under Portugal’s fiscalization audit rules, taxpayers may be notified of an inspection at its start or in advance, and if it cannot proceed immediately, they must provide requested documentation within 2–30 days. Read more

Portugal’s Finance Portal has launched a new English-language “Tax Information” section, replacing the former “Portuguese Tax System” page to improve transparency, accessibility, and usability for foreign citizens. The updated section offers clearer navigation and dynamic content covering key tax topics for individuals and businesses, with additional information to be added progressively as user n... Read more

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. Please make sure to install all available patches sequentially (without skipping). This package contains instruction, release notes, changelog and software packages required for deployment of this software component. Read more

Portugal’s Tax Authority has granted a brief tolerance period by extending the deadline for reporting December 2025 invoice data to 9 January 2026, allowing all compliant submissions by that date to be treated as on time and penalty-free. Read more