Fiscalisation and Real-Time Reporting in Portugal

Portugal operates a fully software-based fiscalization system with no mandatory fiscal hardware. Rather than relying on locked hardware devices, Portugal's compliance model is built entirely around the invoicing application. 

In Portugal, all invoicing and POS software must be certified by the Autoridade Tributária e Aduaneira (AT) and registered before it can legally issue invoices. Every invoice must carry a QR code and ATCUD identifier, with transaction data reported electronically to AT monthly via SAF-T (PT). A Qualified Electronic Signature (QES) on PDF invoices becomes mandatory in January 2027, followed by full SAF-T Accounting in 2028.

Latest Fiscalization News in Portugal

From 2026, Autoridade Tributária e Aduaneira (AT) will have significantly stronger visibility over sales data, and gaps between POS data, invoicing records, and VAT submissions are more likely to be detected and penalised.

The State Budget for 2026 confirms PDF invoices (with QR code proof data) remain accepted until 31 December 2026, giving businesses a clear buffer before the Qualified Electronic Signature (QES) requirement takes effect on 1 January 2027. 

Portugal is also launching a nationwide Deposit and Refund System (DRS) on 10 April 2026, requiring POS and retail systems to handle a refundable deposit on non-reusable beverage containers within fiscal receipts.

What Does Fiscalization Mean in Portugal?

In Portugal, real-time reporting or fiscalization means every taxable sale must be recorded accurately, tamper-proof, traceable, and reconcilable with VAT reporting at any time. Portugal's software-driven approach, shared by several EU neighbours, most notably Spain, requires certified software and real-time reporting with no mandatory fiscal hardware.

The Autoridade Tributária e Aduaneira (AT) governs Portugal's entire framework through six core pillars:

• Certified invoicing software 
• ATCUD (Código Único do Documento) 
• QR code 
• SAF-T XML File 
• Qualified Electronic Signature (QES) 
• SAF-T Accounting

Who Does Fiscalization in Portugal Affect?

If you perform VAT-taxable operations in Portugal and issue invoices or receipts, you are in scope under Decreto-Lei n.º 198/2012. The system distinguishes between what kind of documents a business issues and how:

• All VAT-registered businesses must use AT-certified invoicing software available on the Portal das Finanças, generate ATCUD codes, include QR codes on all fiscal documents, and submit monthly SAF-T
• Retail businesses and POS operators that have any consumer-facing business must run transactions through AT-certified POS software; no mandatory hardware, but software must be certified
• Software developers and POS vendors must register with AT, certify their product, and maintain listing on AT's official registry; certification can be revoked for non-compliance
• Foreign companies registered for Portuguese VAT - No exemption; all QR code, ATCUD, and SAF-T obligations apply equally
• B2G suppliers must also issue structured CIUS-PT e-invoices (EN 16931) through the eSPap/FE-AP platform when invoicing public authorities.

Which Fiscal Regulations Will Affect Businesses in Portugal in 2026?

In 2026, Portugal expects every system that issues invoices or receipts to support three simultaneous controls: certified issuance (Portaria n.º 363/2010), document traceability via QR + ATCUD (Decreto-Lei n.º 28/2019), and electronic reporting to AT (Decreto-Lei n.º 198/2012). 

Here is what that means in practice for 2026:

• QR code and ATCUD mandatory on all invoices, including for foreign VAT-registered businesses
• Monthly SAF-T (PT)  billing file due by the 5th of the following month 
• PDF invoices remain accepted through 31 December 2026 under the State Budget for 2026; QES on PDF invoices becomes mandatory from January 1, 2027
• SAF-T Accounting's first mandatory submission, due in 2028, covering the fiscal year 2027. However, AT can request the file during any tax inspection; thus, businesses should start building the capability before the 2027 fiscal year begins.
• Deposit and Refund System (DRS) launches April 10, 2026. POS and retail systems must handle a refundable deposit on non-reusable beverage containers within fiscal receipts

Certified Invoicing Software

All invoicing and POS software used in Portugal must be certified by AT and listed on its official registry before it can legally issue invoices.

Here is what that means in practice: 

• Support SAF-T (PT) export in the required XML structure
• Sign all invoices cryptographically using RSA keys — as required under Portaria n.º 363/2010
• Prevent hidden modifications to fiscal data
• Maintain a full audit trail with timestamps, invoice numbers, and transaction links
• Register the producer with AT, including submission of the software's public key, via the official AT registry

What Are the Implications and Penalties of Non-Compliance in Portugal?

Violations are classified under the RGIT (General Tax Infraction Regime)  and range from administrative fines to temporary suspension of operations (flexibility on timelines does not mean leniency for persistent non-compliance)

Key Penalties include:

• Failure to issue invoices/receipts or issuing outside legal deadlines: €150 to €3,750 (RGIT Art. 123)
• Failure to present or communicate documents:  €150 to €3,750 (RGIT Art. 117)
• Failure to use certified invoicing or POS software: €3,000 to €18,750
• Retailers using non-certified POS software: up to 50% of the VAT involved
• Corporate tax failures: 30% to 100% of tax due, capped at €45,000 for negligence and €165,000 for intentional violations
• Repeated or serious offences: fines doubled; temporary suspension of business operations may be ordered

Your Trusted Partner for Fiscalization in Portugal

Handling fiscal compliance in Portugal means ensuring your POS, invoicing, and billing systems/invoice processing are AT-certified, generate QR codes and ATCUD, and submit monthly SAF-T files on time. DDD Invoices handles fiscal compliance stack across 30+ countries, so your systems stay compliant as requirements progress.

We manage the full compliance stack, from software registration and B2G e-invoicing, and keep you ahead of upcoming mandates. With DDD Invoices, your teams focus on growth while we handle compliance.

FAQs

1) Are PDF invoices with a QR code proof valid in Portugal in 2026?

Yes. The State Budget for 2026 confirms that PDF invoices with QR code proof are accepted as electronic invoices until 31 December 2026. 

2) What is ATCUD, and why does it matter?

ATCUD is the unique document code required on invoices and certain fiscally relevant documents, linked to a validation code obtained via communication of the document series to AT. 

3) Do we really have to report invoice data to AT?

Yes, entities subject to Portuguese invoicing rules must communicate invoice elements to AT electronically, using approved methods (e.g., real-time transmission, SAF-T(PT), or portal entry). 

4) What’s the deadline for communicating invoice data?

The standard deadline is by the 5th of the following month after issuance. 

5) Where can we verify whether invoicing software is certified?

AT provides an official list of certified invoicing programs, or you can log in and manage your compliance obligations directly via the AT secure portal

6) What are the fines for not issuing invoices?

Under RGIT Art. 123, failure to issue invoices/receipts (or issuing them late when legally required) is punishable by a fine of €150 to €3,750.