Italy vs KAI S.r.l. (Shell Italia Aviazione), March 2026, Supreme Court, Case No 5753/2026
Table of Contents
Case Information
Court: Corte di Cassazione, Sezione 5 (Italian Supreme Court, Tax Section)
Case number: 5753/2026 (originating from R.G. n. 28448/2018)
Citation: Corte di Cassazione, Sez. 5, Sentenza n. 5753, 13 March 2026
Applicant: Agenzia delle Entrate (Italian Revenue Agency), represented by the Avvocatura Generale dello Stato
Respondent: KAI S.r.l. (formerly Shell Italia Aviazione S.r.l.) and Shell Italia Holding S.p.A., represented by Avvocati Francesco Capitta and Arianna Valenza
Jurisdiction: Italy
Judgment date: 13 March 2026
Judgment Summary
KAI S.r.l. (formerly Shell Italia Aviazione S.r.l.), a wholly owned subsidiary of Shell Italia Holding S.p.A. operating in the aviation fuel (jetfuel) sector, was subject to a tax audit in 2012 for the 2010 tax year. The audit produced three assessment notices covering IRES, IRAP and the so-called Robin Tax surcharge.
The main issues concerned: (i) the deductibility of intragroup costs totalling euro 1,389,576.00 charged to KAI under two Cost Contribution Agreements with the UK-resident group company Shell International Petroleum Company Ltd (SIPCO); (ii) the Robin Tax surcharge assessed on the additional taxable base; and (iii) the disallowance of costs of euro 626,681.00 for mandatory-stock commissions on the ground that they were attributable to 2009, not 2010.
The first-instance Milan Tax Commission (CTP) annulled all assessments. On appeal by the Revenue Agency, the Lombardia Regional Tax Commission (CTR) upheld the appeal only as regards the timing (competence) issue, confirming the disallowance of the costs attributed to the wrong year. Both sides appealed to the Supreme Court.
At the Supreme Court hearing on 18 February 2026, both parties agreed that assessment notices n. TMB037P00420 (Robin Tax) and n. TMB0E7P00252 (IRAP) had been settled under Article 6 of Decree-Law n. 119/2018. The court declared the proceedings extinct as regards those notices and proceeded to decide the remaining issues.
Background
KAI S.r.l., formerly Shell Italia Aviazione S.r.l., operated in the petroleum sector, specifically in the commercialisation of aviation fuel (jetfuel) for the Shell Italia group. It was wholly owned by Shell Italia Holding S.p.A. and was consolidated into that company's tax group.
In 2012 the Revenue Agency carried out a tax audit for IRES, IRAP and VAT purposes. The audit concluded in December 2012 with the service of a tax inspection report (processo verbale di constatazione). In September 2015 three assessment notices were issued for the 2010 tax year, also extended to Shell Italia Holding S.p.A. as the consolidating entity.
The assessments covered: (i) disallowed intragroup costs of euro 1,389,576.00; (ii) the Robin Tax surcharge under Article 81, paragraph 16 of Decree-Law 112/2008 as amended by Article 27 of Law n. 99 of 23 July 2009, applied to the additional taxable base; and (iii) disallowed mandatory-stock commission costs of euro 626,681.00 on the ground that they belonged to the 2009 tax year rather than 2010.
KAI had entered into two Cost Contribution Agreements with SIPCO, a company incorporated under English law and resident for tax purposes in the United Kingdom. The first, the Cost Contribution Agreement for Business Support Services (BSS agreement), covered centralised business functions including human resources, finance, information technology, procurement, legal services and credit management. The second, the Cost Contribution Agreement for Research and Development and Technical Support Services (RDTS agreement), covered research and development, new product development, intellectual property management, marketing tools, and health and safety support. Costs under both agreements were allocated by reference to the ratio of revenues attributable to each participant to total worldwide aviation business revenues, net of intragroup transactions and indirect taxes.
Core Dispute
The central dispute before the Supreme Court concerned two matters.
First, whether the CTR had correctly upheld the full deductibility of the intragroup costs of euro 1,389,576.00 charged to KAI under the BSS and RDTS Cost Contribution Agreements. The Revenue Agency argued that the CTR had wrongly treated the erroneous citation of Article 110, paragraph 7 of the TUIR (transfer pricing) rather than Article 109, paragraph 5 of the TUIR (inherence) as a ground to invalidate the assessment, and had further erred by accepting generic reasoning as sufficient proof that KAI derived effective utility from the services.
Second, whether KAI was entitled to have the 2009-competence costs disallowed in 2010 offset against an overpayment of tax in 2009, either as a correction of a declaratory error or by means of judicial compensation between the two tax periods.
Court Findings
On the first issue, the Supreme Court held that the erroneous citation of a statutory provision in an assessment notice does not of itself render the notice null for failure to state reasons, provided the notice sets out the factual and legal grounds clearly enough to allow the taxpayer to exercise its right of defence, referring to prior decisions including Cass. n. 9499/2017 and Cass. n. 3257/2002. The court found that the assessment notice had set out an analytically reasoned challenge based on lack of inherence, quoting extensively from the notice itself, and had expressly identified the specific services for which some utility was accepted (Credit Management euro 4,271.76, Information Technology euro 58,173.74 and Human Resources euro 29,096.19) while disputing the remainder.
The court reaffirmed the established principle, citing Cass. n. 2599/2023, n. 32422/2018, n. 23164/2017 and others, that for intragroup service costs to be deductible the subsidiary must derive an effective utility from the remunerated service, that utility must be objectively determinable and adequately documented, and the burden of proving existence and inherence rests on the taxpayer. The mere production of the contract and invoices is insufficient; specific evidence of effective or potential utility derived by the receiving entity is required.
The court held that the CTR had failed to apply those principles. The CTR's reasoning, characterising the BSS services as supporting the business "in senso lato" (broadly) and the RDTS services as "genericamente diretti" (generically directed) at new product development, and relying on the fact that KAI achieved a turnover of 210 million euro in 2010 with only eight employees, was manifestly generic. The CTR had not verified the existence of a specific, identifiable and quantifiable link between the services and particular needs of the Italian company.
On the second issue, the court rejected KAI's cross-appeal seeking compensation between the 2010 tax debt and an overpayment of 2009 tax. Citing Cass. n. 15019/2020, n. 16093/2022 and n. 23521/2020, it held that the rules on temporal allocation of negative income components under Article 75 (now Article 109) of the TUIR are mandatory and binding on both taxpayer and Revenue Agency, that the taxpayer cannot choose to deduct a cost in a year other than the year of competence, and that where tax is actually paid twice the available remedies are the amended return and the refund claim. The taxpayer's failure to use those remedies, and the characterisation of the choice as an error rather than a deliberate decision, did not alter that conclusion.
The proceedings concerning the Robin Tax assessment (notice n. TMB037P00420) and the IRAP assessment (notice n. TMB0E7P00252) were declared extinct for cessation of the subject matter following settlement under Article 6 of Decree-Law n. 119/2018.
Outcome
The Supreme Court: (i) declared the proceedings extinct for cessation of the subject matter in relation to the Revenue Agency's second ground of appeal (Robin Tax) and the taxpayers' second, third and fourth grounds of cross-appeal (IRAP matters), all settled under Article 6 of Decree-Law n. 119/2018; (ii) allowed the Revenue Agency's first ground of appeal concerning the deductibility of intragroup costs; (iii) rejected the taxpayers' first ground of cross-appeal concerning the cross-period competence compensation; (iv) quashed the CTR judgment in so far as it related to the allowed ground; and (v) remitted the case to the Lombardia Regional Tax Court of Second Instance (Corte di giustizia tributaria di secondo grado della Lombardia), sitting in a different composition, for fresh and reasoned examination and for a ruling on the costs of the cassation proceedings.
TP Method Highlighted
The allocation of intragroup costs under both Cost Contribution Agreements was based on the ratio of revenues attributable to the individual participant to total worldwide aviation business revenues, net of intragroup transactions and applicable indirect taxes. The judgment does not describe any specific OECD transfer pricing method applied or endorsed by the court. The court noted that, in intragroup contract cases, questions of inherence and arm's length value under the transfer pricing rules in Article 110, paragraph 7 of the TUIR frequently arise together, while remaining legally and logically distinct.
Major Issues / Areas of Contention
- Whether the citation of the transfer pricing provision (Article 110, paragraph 7 TUIR) rather than the inherence provision (Article 109, paragraph 5 TUIR) in the assessment notices rendered those notices invalid for failure to state adequate reasons.
- Whether intragroup costs of euro 1,389,576.00 charged to KAI under the BSS and RDTS Cost Contribution Agreements with SIPCO (UK) were deductible, and what standard of proof is required to establish effective utility of intragroup services.
- Whether the burden of proving the existence and inherence of intragroup costs rests on the taxpayer or the Revenue Agency.
- Whether the CTR's generic reasoning, including reference to KAI achieving euro 210 million turnover with eight employees, was sufficient to establish the deductibility of the intragroup costs.
- Whether costs of euro 626,681.00 for mandatory-stock commissions, incorrectly deducted in 2010 rather than 2009, could be the subject of a judicial cross-period compensation or offset between the 2010 tax debt and an alleged 2009 overpayment.
- Whether the Robin Tax surcharge under Article 81, paragraph 16 of Decree-Law 112/2008 (as amended) could be assessed on the additional taxable base, a matter rendered moot by settlement under Article 6 of Decree-Law n. 119/2018.
- Whether the transfer pricing rules in Article 110, paragraph 7 TUIR applied to IRAP, a matter also rendered moot by the same settlement.