Companies headquartered in mainland Portugal often operate in the Autonomous Regions through stores, branches, or other fixed installations. When that happens, a recurring question arises in corporate tax compliance: should the State surcharge (“derrama estadual”) apply to profits attributable to Madeira and the Azores, or should the Regional surcharges prevail?
A recent CAAD (Administrative Arbitration Centre) tax arbitration decision (Process n.º 19/2025-T, decision dated November 5, 2025) provides a practical and taxpayer-relevant answer.
The case in brief
The taxpayer was a public limited company (S.A.) headquartered in mainland Portugal, operating an extensive national retail network that included establishments in Madeira and the Azores.
For 2021, the company reported, among other figures:
- Turnover attributable to Madeira: €26,352,140.04
- Turnover attributable to the Azores: €13,664,386.50
- Total taxable profit (lucro tributável): €57,184,587.87
- State surcharge assessed via Modelo 22: €3,551,612.91
The dispute focused on whether the State surcharge had been levied on a base that should have been taxed (in part) under the Regional surcharge rules.
The key legal question the tribunal answered
Can Regional surcharges (Madeira/Azores) override the State surcharge for the taxable base attributable to permanent establishments in the Autonomous Regions, even if the company’s head office is in mainland Portugal?
In this decision, CAAD’s answer was directionally clear: yes, in the relevant circumstances, the Regional surcharges prevail for the portion attributable to the Regions, and the State surcharge applies only to the remainder attributable to mainland Portugal.
Why the decision matters: three practical principles
1. “Permanent establishment” is interpreted broadly for Regional surcharge purposes
The case relied on the concept of estabelecimento estável, which refers to an installation with effective economic activity in the Region. Notably, the tribunal rejected a restrictive approach that would limit the regime to entities “non-resident in Portugal.” Instead, it accepted that the rule can also cover entities that are not resident in the Region (even if they are resident elsewhere in Portugal), provided they have a qualifying establishment there.
2. Allocation follows the Autonomous Regions’ Finance Law mechanics
The decision confirms the relevance of allocating resources by territory using the statutory methodology, i.e., attributing results to each Region based on the annual turnover of each installation compared to the total. pasted
3. The State surcharge should not “double bite” the Regional base
CAAD accepted the logic that the State surcharge should not apply to the portion of taxable profit already properly attributable to Madeira and the Azores and subject to the respective Regional surcharge regimes. pasted
What happened in the outcome
The tribunal ordered a partial annulment of the self-assessment to the extent that it included the State surcharge on the taxable base attributable to the Autonomous Regions. The case also addressed compensatory interest (juros indemnizatórios), accepting that interest could be due from the payment date, based on the reasoning described in the file.
How to apply the decision in real life: a compliance-oriented workflow
If your company has headquarters in mainland Portugal but operates through stores, branches, warehouses, factories, or other fixed installations in Madeira and/or the Azores, the practical steps typically include:
- Revisit Modelo 22 to confirm whether you attributed taxable profit to the Regions using the legally relevant allocation approach.
- Apply the Regional surcharge rates to the portion attributable to each Autonomous Region.
- Apply the State surcharge only to the remaining taxable profit attributable to mainland Portugal (where applicable).
If you identify an excess State surcharge, consider a procedural path (administrative claim and/or arbitration, case dependent) and evaluate the basis to request interest.
FAQ
- Does this only apply to foreign companies? No. The decision supports an interpretation that also covers companies resident in Portugal, provided they are not resident in the Region and operate there through a qualifying establishment.
- Does this matter if my business only has “clients” in Madeira but no local installation? The logic in the material is linked to having an installation with effective activity in the Region, not merely sales to customers located there.
- What is the main takeaway? For multi-regional businesses, get the territorial attribution right from the start. Then apply the Regional surcharge to the regional base, and the State surcharge to the mainland remainder.
This article provides general information based on the referenced CAAD arbitration summary and does not constitute legal, tax, or accounting advice. The applicability of the principles described depends on the specific facts, documentation, and filing position of each taxpayer, including how the company’s activity is structured and evidenced in each Autonomous Region.
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