Portugal Confirms SAF-T Accounting Deadlines via 2026 State Budget Law

Context

The 2026 State Budget Law represents Portugal's first definitive legislative instrument confirming the implementation timeline for SAF-T Accounting. This obligation requires businesses to maintain accounting records in a standardized digital format that facilitates tax audits, aligning Portugal's practices with broader EU initiatives toward tax digitization and compliance modernization. The Autoridade Tributária e Aduaneira (AT), Portugal's Tax and Customs Authority, will oversee compliance with this new requirement.

Prior to this legislation, Portugal's SAF-T plans were discussed in policy circles but lacked a specific statutory source or concrete deadlines. The 2026 State Budget Law now provides businesses with a clear planning horizon, allowing them to adapt their accounting systems and processes well in advance of the 2027 compliance start date.

Implementation Timeline

The SAF-T Accounting mandate will apply to accounting periods beginning from 2027 onwards, with the first submission deadline set for 2028. This two-stage implementation provides businesses with a clear timeline:

• 2027: All accounting records for this fiscal year must be maintained in the SAF-T format from the outset.
• 2028: The first submission of these records to the AT is expected.

This timeline offers businesses a sufficient window to upgrade their accounting systems, train staff, and ensure compliance with the new requirements. As of October 2, 2026, no subsequent amendments or delays to this timeline have been announced.

Responsibilities and Oversight

The Autoridade Tributária e Aduaneira (AT) is the designated oversight body for SAF-T Accounting compliance in Portugal. Businesses operating within the country must ensure their accounting systems can generate and maintain records in the SAF-T format, which will facilitate more efficient tax audits by the AT. This standardized approach aims to streamline the audit process and reduce compliance burdens through digital standardization.

Implications for Businesses

Businesses operating in Portugal should prioritize the following steps to ensure compliance with the SAF-T Accounting obligation:

1. System Upgrades: Assess and upgrade accounting systems to support SAF-T format recording and submission.
2. Staff Training: Train accounting and finance staff on the new requirements and system changes.
3. Process Adaptation: Review and adapt internal processes to ensure timely submission of SAF-T records to the AT.

Early preparation is crucial, as the 2027 start date for record-keeping in the SAF-T format is imminent. Businesses that delay may face compliance challenges and potential penalties.

Outlook and What to Watch

While the 2026 State Budget Law provides clear deadlines, businesses should monitor for any potential updates or guidance from the AT regarding specific technical requirements or submission procedures. Additionally, as Portugal continues to align its tax policies with EU directives, further digitization initiatives may emerge in the coming years.

Businesses should also stay informed about any potential amendments to the timeline or additional guidance that may be issued by the AT. Proactive engagement with tax advisors and accounting professionals can help ensure smooth compliance with these new requirements.