Process: 170/2014-T

Date: October 30, 2014

Tax Type: IUC

Source: Original CAAD Decision

Summary

This tax arbitration case (Process 170/2014-T) addresses the subjective incidence of Portugal's Single Circulation Tax (IUC) and the material jurisdiction of the Tax Arbitration Tribunal (CAAD). A financial institution specializing in hire-purchase and financial leasing contracts challenged IUC assessments for 2009-2012, arguing it had sold the vehicles and should not be liable as taxpayer. The company contended that Article 3 of the IUC Code establishes only a rebuttable legal presumption (juris tantum) linking tax liability to vehicle registration, and that registration serves merely a publicity function without constitutive effect. The Tax and Customs Authority raised a preliminary exception of material incompetence, arguing that the disputed acts were not ex officio assessments but rather collection notes voluntarily generated by the claimant itself through the Finance Portal. The Authority argued collection notes are not reviewable tax acts under arbitration jurisdiction, and that such disputes require a special administrative action instead. Additionally, the Authority contended that even if considered self-assessments, prior mandatory administrative review under Article 131 CPPT was required before judicial challenge. On the merits, the Authority defended that Article 3(1) of the IUC Code intentionally establishes registered ownership as the definitive criterion for tax liability, not a mere presumption. The legislator deliberately chose the formulation 'being considered as such those registered' rather than 'being presumed,' reflecting a clear legislative policy that IUC incidence follows vehicle registration records. The Authority emphasized that challenges to ownership must be directed to the vehicle registration itself through proper administrative channels, not collaterally through tax proceedings. The case highlights critical procedural requirements for challenging IUC liability and the limits of tax arbitration jurisdiction when taxpayers contest their status as registered vehicle owners.

Full Decision

A – REPORT

  1. A..., SA., legal entity no. …, with registered office at Rua …, Lisbon, requested the constitution of an arbitral tribunal, pursuant to the provisions of article 2, no. 1, a) and article 10, nos. 1 and 2 of the Legal Regime for Tax Arbitration, as provided in Decree-Law 10/2011, of 20 January, hereinafter designated "LRTA", and of articles 1 and 2 of Order no. 112-A/2011, of 22 March, seeking the declaration of illegality of the acts of ex officio assessment of the Single Circulation Tax, relating to the years 2009, 2010, 2011 and 2012, and the recognition of the right to compensatory interest, with the Tax and Customs Authority being named as respondent (hereinafter designated "TCA").

  2. The request for the constitution of a singular arbitral tribunal having been admitted, and the claimant not having opted for the appointment of an arbitrator, pursuant to the provisions of subparagraph a) of no. 2 of article 6 and subparagraph b) of no. 1 of article 11 of the LRTA, in the wording introduced by article 228 of Law no. 66-B/2012, of 31 December, the Deontological Council appointed the undersigned as arbitrator.

The parties were notified of this appointment, and manifested no intention to challenge the appointment of the arbitrator, pursuant to the combined provisions of article 11, no. 1, subparagraphs a) and b) of the LRTA and articles 6 and 7 of the Deontological Code, and, in accordance with the provision of subparagraph c) of no. 1 of article 11 of the LRTA, in the wording introduced by article 228 of Law no. 66-B/2012, of 31 December, the arbitral tribunal was constituted on 15-04-2014.

  1. The TCA, having been notified, presented its response in which it raised, by way of exception:

a) irregularity of the judicial mandate in the file

b) lack of material jurisdiction of the arbitral tribunal

The irregularity of the judicial mandate was remedied by the claimant, with the attachment of a new power of attorney that ratified all proceedings.

  1. The holding of the meeting provided for in article 18 of the LRTA, as well as the presentation of arguments, were waived with the consent of the parties.
  1. The claimant requests that the illegality and consequent annulment of the acts of assessment of the Single Circulation Tax relating to the years 2009 to 2012 be declared, with the consequent restitution of the tax paid, plus compensatory interest, alleging in summary:

a) That it is a financial institution whose corporate purpose is the practice of operations permitted to banks, with the exception of the acceptance of deposits.

b) In the exercise of its activity, it concludes with its clients contracts of hire-purchase and financial leasing contracts for motor vehicles, at the end of which it transfers ownership of the same to the respective lessees or to third parties.

c) That it sold the motor vehicles to which the assessments relate, for the purpose of which it attached copies of the respective invoices/receipts.

d) Between 10 and 20 December 2013 it was notified of ex officio assessments of Single Circulation Tax, relating to the years 2009 to 2012.

e) It proceeded to payment of the tax relating to the disputed assessments.

f) It sustains, in summary, its claim on the understanding that article 3 of the SCIUC establishes a mere legal presumption, relative, juris tantum.

g) On the other hand, it argues that the essential function of registration is only to give publicity to the act, having no constitutive effect, functioning as a mere rebuttable presumption of the existence of the right, as well as of the respective ownership.

  1. In turn, the respondent alleged in response, in summary:

a) The claim of the claimant is mistaken in describing the disputed assessments as "ex officio assessments".

b) The documents attached by the claimant do not constitute any ex officio assessments but mere collection notes.

c) Collection notes generated and extracted by the claimant itself in the "Finance Portal" via the internet.

d) It was therefore the claimant that, without being notified for that purpose, voluntarily proceeded to the issuance of the collection notes and proceeded to their payment.

e) The assessment and collection note are two distinct realities, the latter not constituting a tax act, not even having a complementary nature in relation to the former.

f) Not constituting the collection note a tax act, there is, in this case, lack of subject matter which gives rise to the dismissal of the respondent.

g) The means of reaction against the said collection notes should be a special administrative action.

h) The arbitral tribunal is materially incompetent to examine and decide the claim that is the subject of the dispute.

i) Even if this were not admitted and it were understood that self-assessments carried out by the claimant are in question, it happens that the reaction against the same is dependent on prior and necessary filing of a request for administrative review, as provided for in article 131 of the TCPT.

j) Having the claimant not presented a request for administrative review in relation to the self-assessment acts sub judice, the same are not subject to being reviewed in these proceedings.

k) The understanding advocated by the claimant suffers not only from a skewed reading of the letter of the law, but also from the adoption of an interpretation that does not take into account the systematic element, violating the unity of the regime established in the entire SCIUC and, more broadly, in the entire legal-tax system and, lastly, it derives from an interpretation that ignores the rationale of the regime established in the article in question, and indeed, in the entire SCIUC.

l) The tax legislator, in establishing in article 3, no. 1, who are the taxpayers of the Single Circulation Tax, established expressly and intentionally that these are the owners (or in the situations provided for in no. 2, the persons enumerated therein), being considered as such the persons in whose name the same are registered.

m) It emphasizes that the legislator did not use the expression "it is presumed", as it could have done, for example, in the following terms: "the taxpayers of the tax are the owners of the vehicles, being presumed as such the natural or legal persons, of public or private law, in whose name the same are registered".

n) The tax provision is replete with provisions analogous to that established in the final part of no. 1 of article 3, in which the tax legislator, within its freedom of legislative configuration, expressly and intentionally, establishes what should be considered legally, for purposes of incidence, of income, of exemption, of determination and of periodization of taxable profit, for purposes of residence, of location, among many others.

o) It is a clear option of legislative policy adopted by the legislator, whose intention, within its freedom of legislative configuration, was that, for purposes of Single Circulation Tax, those who appear as such in the motor vehicle register should be considered owners.

p) The contestation of motor vehicle ownership necessarily must be directed against what appears in the motor vehicle register itself – through the means provided for in the Motor Vehicle Register Regulation – and not against the tax effect that results from the motor vehicle register information.

q) In light of a teleological interpretation of the regime established throughout the Code of the Single Circulation Tax, the interpretation advocated by the claimant to the effect that the taxpayer of the Single Circulation Tax is the effective owner, regardless of not appearing in the motor vehicle register, the registration of that quality, is manifestly wrong, in that it is the very rationale of the regime established in the Code of the Single Circulation Tax that constitutes clear proof that what the tax legislator intended was to create a Single Circulation Tax based on the taxation of the owner of the vehicle as recorded in the motor vehicle register.

r) The interpretation put forward by the claimant is contrary to the Constitution, in that it violates the principle of confidence and legal certainty, the principle of efficiency of the tax system and the principle of proportionality.

s) The invoice is not apt to prove the conclusion of a synallagmatic contract, as is a purchase and sale, since that document does not by itself reveal an essential and unequivocal declaration of intention on the part of the alleged purchaser.

t) The unequivocal declaration of intention of the alleged purchasers could be evidenced by the attachment of a copy of the official model for registration of motor vehicle ownership, since it is a document signed by the intervening parties.

u) It sustains that the tax acts in question are valid and legal, because they conform to the legal regime in force at the date of the tax facts, whereby no error imputable to the services occurred, in this case.

v) It further argues that, in any circumstance, the legal requirements conferring the right to compensatory interest claimed are not met.

  1. The Arbitral Tribunal was regularly constituted and is materially competent.

The parties enjoy legal personality and capacity and are legitimate (articles 4 and 10, no. 2, of the same instrument and article 1 of Order no. 112-A/2011, of 22 March).

The proceedings are free from nullities.

B. DECISION

  1. MATTER OF FACT

1.1. FACTS PROVED

The following facts are considered proved:

a) The claimant is a financial institution whose corporate purpose is the practice of operations permitted to banks, with the exception of the acceptance of deposits.

b) In the exercise of its activity, it concludes with its clients contracts of hire-purchase and financial leasing contracts for motor vehicles, at the end of which it transfers ownership of the same to the respective lessees or to third parties.

c) The claimant issued invoices relating to the sale of all motor vehicles to which the disputed assessments relate with dates prior to the payment deadline dates for the Single Circulation Tax for the years 2009 to 2012.

d) However, the respective purchasers did not register their ownership.

e) The assessments that are the subject of these proceedings did not result from any notification to that effect effected by the TCA.

f) The claimant proceeded to payment of the tax to which these proceedings relate.

g) The claimant presented, on 24-02-2014, the request for arbitral ruling which gave rise to these proceedings.

1.2 The facts were given as proved on the basis of documents attached to the proceedings by the claimant, whose authenticity was not challenged by the respondent.

1.3 FACTS NOT PROVED

There are no facts given as not proved with relevance to the examination of the claim.

1.4 THE LAW

The TCA raised, in the response it presented, the lack of jurisdiction of the arbitral tribunal to examine the claim that is the subject of these proceedings.

It argues, for this purpose, that the claimant incorrectly designates the assessments in question as "ex officio assessments", in that the TCA never initiated them nor, much less, notified the claimant thereof.

Moreover, it argues that what is in question is not even tax assessments – and, as such, there is no assessment in the technical sense – but merely collection notes obtained voluntarily by the claimant itself in the "Finance Portal".

It seems to us that the respondent will have only partial reason in its thesis.

Indeed, the TCA seeks to attribute to what it designates as "collection notes" the same effect as the so-called "payment notices". Which is manifestly not the case.

Payment notices are indeed "simple acts of publicity" as the respondent rightly argues when invoking the work of Alberto P. Xavier. Being intended to "give publicity" to a tax act embodied in a subsequent assessment.

In this case, the aforementioned "collection notes" translate into an actual tax assessment in the strict sense. It is, however, an assessment carried out by the claimant itself, the so-called self-assessment. Which stems, moreover, from the Code of the Single Circulation Tax itself.

This is, indeed, the normal means of assessment of the Single Circulation Tax. To this effect, article 16, no. 2 provides: "the assessment of the tax is made by the taxpayer itself via the internet, under the conditions of registration and access to electronic declarations".

Self-assessment which, in any case, would always be mandatory for the claimant, in that the same provision requires that it is mandatory for legal entities.

Being the issuance of the so-called "collection note" the result of this self-assessment, as results from no. 4 of the same article 16: "… issued single collection document which, certified by the means in use in the collection network, proves proper payment of the tax".

It is thus concluded that only the TCA does not have reason when it invokes the non-existence of a tax act, which is, however, on its side when it argues the non-existence of ex officio assessments, in that what is actually in question is self-assessments of the tax.

Given this, we hold that the respondent continues to invoke the lack of jurisdiction of this arbitral tribunal due to the failure to observe prior request for administrative review. It invokes, for this purpose, the provision of article 131 of the TCPT.

And at this point there seem to be no doubts that can subsist. For the said provision imposes, in an unequivocal manner, that "in case of error in self-assessment, the challenge will necessarily be preceded by a request for administrative review".

Mandatory procedure which the claimant did not observe.

It is true that, in accordance with the provision of article 2, no. 1, a) of the LRTA, arbitral tribunals are competent to examine the declaration of illegality of self-assessment acts. But from this does not result its unbounded jurisdiction, since it is required that they decide in accordance with established law and, in particular with the provision of the TCPT [article 2, no. 4 and article 29, no. 1, a) of the LRTA].

Now, this proceeding not having been preceded by the necessary request for administrative review, it is incumbent to conclude that there is lack of material jurisdiction of this tribunal for the examination and decision of the request for arbitral ruling.

The infraction of the rules on material jurisdiction is of ex officio knowledge and determines the absolute lack of jurisdiction of the tribunal and the dismissal of the case (article 16 of the TCPT and articles 99, no. 1 and 278, no. 1, a) of the CPC).

The examination of the other questions raised is considered prejudicial (article 608, no. 2 of the CPC).

  1. DECISION

In light of the foregoing, it is decided to declare the lack of material jurisdiction of this arbitral tribunal to know the merits of the claim and, consequently, to dismiss the case against the Tax and Customs Authority.

VALUE OF THE PROCEEDINGS: In accordance with the provisions of article 306, no. 2 of the Code of Civil Procedure, article 97-A, no. 1, a) of the Code of Tax Procedure and Procedure and article 3, no. 2 of the Regulation of Costs in Tax Arbitration Proceedings, the value of the proceedings is set at €3,192.35 (three thousand one hundred ninety-two euros and thirty-five cents).

COSTS: Pursuant to the provision of article 22, no. 4, of the Regulation of Costs in Tax Arbitration Proceedings, the amount of costs is set at €612.00 (six hundred and twelve euros), in accordance with Table I annexed to the Regulation of Costs in Tax Arbitration Proceedings, to be borne by the claimant.

Let notification be made.

Lisbon, 30 October 2014

The arbitrator

(António Alberto Franco)

Frequently Asked Questions

Automatically Created

Who is liable for IUC (Imposto Único de Circulação) when a vehicle has been sold or transferred to another owner?
Under Article 3(1) of the IUC Code, liability for IUC falls on the registered owner of the vehicle as shown in the motor vehicle register. Portuguese tax authorities interpret this as a definitive legislative choice, not a rebuttable presumption. Even when a vehicle has been physically sold or transferred, the person or entity appearing in the registration remains liable for IUC until the ownership transfer is officially registered. Financial institutions engaged in leasing or hire-purchase arrangements remain liable for IUC during the contract term unless ownership is transferred and registered. To avoid IUC liability after disposal, sellers must ensure the vehicle registration is updated to reflect the new owner. Mere possession of sales invoices or transfer agreements is insufficient to eliminate IUC liability if registration has not been updated accordingly.
Can a financial institution challenge IUC assessments through tax arbitration at CAAD?
Financial institutions can generally challenge IUC assessments through CAAD tax arbitration under Article 2(1)(a) of the RJAT (Legal Regime for Tax Arbitration). However, jurisdictional requirements must be met. The challenged act must constitute a reviewable 'tax act' - formal assessments issued by tax authorities qualify, but collection notes voluntarily generated by taxpayers through self-service portals may not. If the IUC was self-assessed by the taxpayer, prior mandatory administrative review under Article 131 CPPT may be required before arbitration. The arbitral tribunal lacks jurisdiction over collection notes that are not true tax acts, as these require challenge through special administrative proceedings. Financial institutions should carefully identify whether they are challenging an ex officio assessment by the Tax Authority or their own self-assessment to determine the proper procedural avenue and ensure CAAD has material jurisdiction over the dispute.
What are the grounds for claiming material incompetence of the Arbitral Tribunal in IUC disputes?
Material incompetence of the Arbitral Tribunal in IUC disputes can be raised on several grounds. First, when the challenged act is not a reviewable 'tax act' but rather a collection note voluntarily generated by the taxpayer through electronic systems like the Finance Portal - collection notes lack the nature of administrative tax decisions subject to arbitration. Second, when mandatory prior administrative review has not been exhausted, particularly for self-assessments where Article 131 CPPT requires filing a request for administrative review before judicial challenge. Third, when the dispute fundamentally concerns vehicle registration ownership rather than tax assessment legality - challenges to registration records must be directed through motor vehicle registration procedures, not tax arbitration. The respondent Tax Authority may argue that arbitral tribunals established under the RJAT lack subject-matter jurisdiction over disputes that should be resolved through special administrative actions or other non-tax judicial mechanisms, resulting in dismissal without prejudice to the merits.
Is a taxpayer entitled to compensatory interest (juros indemnizatórios) when IUC is unlawfully assessed after vehicle disposal?
Entitlement to compensatory interest (juros indemnizatórios) when IUC is unlawfully assessed after vehicle disposal depends on demonstrating that the taxpayer is not the legitimate IUC debtor and that tax was improperly collected. Under Article 43 LGT, compensatory interest is due when tax has been paid in excess due to errors attributable to tax services. However, if IUC liability follows registered ownership under Article 3(1) of the IUC Code regardless of actual possession, proving 'unlawful assessment' becomes challenging. The taxpayer must establish that the assessment violated applicable law, not merely that economic ownership had transferred. If registration determines liability as a legislative policy choice rather than a rebuttable presumption, disposal without registration transfer may not constitute grounds for claiming unlawful assessment. Compensatory interest claims require demonstrating both illegality of the tax collection and that amounts were paid in excess of legal obligation, which is difficult when registration-based liability makes the taxpayer formally liable despite vehicle disposal.
How does the CAAD handle IUC disputes involving leasing companies and long-term vehicle rental contracts?
CAAD handles IUC disputes involving leasing companies and rental firms by first examining jurisdictional prerequisites and the nature of challenged acts. Key issues include whether the dispute concerns true tax assessments or self-generated collection notes, whether mandatory administrative review was exhausted, and whether the tribunal has material jurisdiction. On the merits, CAAD applies Article 3 of the IUC Code, which establishes that registered owners are taxpayers. Leasing companies typically remain registered owners during lease terms and are therefore liable for IUC. The tribunal examines whether Article 3(1) creates a rebuttable presumption or a definitive criterion for tax incidence. Portuguese tax jurisprudence tends to interpret registration as the definitive basis for IUC liability, reflecting legislative policy for administrative efficiency. Leasing companies arguing they transferred economic ownership must demonstrate formal registration changes. CAAD may lack jurisdiction if the fundamental dispute concerns vehicle registration validity rather than tax assessment legality, directing parties to proper administrative channels for registration challenges before addressing tax consequences.