The facts
Bunge Ibérica SA (the Taxpayer) is the Spanish subsidiary of the Bunge Group, a multinational agri-commodities business operating across the full agricultural value chain. The Taxpayer’s principal activity in the relevant periods was wholesale trading in cereals, seeds, fertilisers, and related agricultural commodities.
In the tax years 2014 and 2015, the Taxpayer participated in the Bunge Group’s centralised treasury management system. The European arm operated through Bunge Europe Finance BV (BFBV), a Dutch group entity that acted as pool leader. At the end of each business day, the Taxpayer’s bank accounts were swept to zero — the classic zero-balancing or barrido diario structure — with surplus positions transferred to accounts held with Citibank Madrid (euros) and JP Morgan London (dollars), and from there to BFBV’s current accounts. When BFBV required external funding it accessed the financial markets through the Bunge Master Trust vehicle, which raised financing at group credit quality on behalf of the whole group.
The Taxpayer’s transfer pricing documentation priced the pool using two methodologies: deposits into the pool were priced by reference to short-term deposit rates at financial institutions; drawdowns from the pool were priced using Bloomberg BVAL yield curves based on the Taxpayer’s own standalone credit rating at a five-year maturity. This produced a material asymmetry — a significantly higher rate applied to borrowings than to deposits — with the differential accruing to BFBV as pool leader.
The AEAT’s Delegación Central de Grandes Contribuyentes commenced an inspection of fiscal group 278/05 in June 2015. The Oficina Nacional de Fiscalidad Internacional (ONFI) issued a transfer pricing analysis on 7 July 2017 that rejected both the standalone credit rating and the rate asymmetry, substituting the group credit rating and requiring symmetrical rates for debit and credit positions. A liquidation assessment was issued in October 2018.
The litigation
Tribunal Económico-Administrativo Central (TEAC) · 8 October 2019 · authority upheld
The Taxpayer challenged the liquidation before the TEAC, arguing that its standalone credit rating should apply and that asymmetric rates were commercially justified. The TEAC dismissed the claim. On credit rating: because participants in the pool both lend to and borrow from the system indistinguishably, the lender and borrower functions reside in the group as a whole, making the group rating the appropriate reference. On symmetry: BFBV cannot decide which entity receives funds or refuse contributions from participants — its functions are administrative and managerial, not those of a financial institution.
Audiencia Nacional (AN) · 23 October 2023 · authority upheld
The Taxpayer appealed to the Audiencia Nacional, which confirmed the TEAC’s reasoning on both points. In a zero-balancing cash pool, the mutual nature of the arrangement — where any participant may be in a debit or credit position at any time — makes it more logical and commercially realistic to expect symmetrical rates, particularly where the pool leader adds no value. The AN found that the Taxpayer’s approach — treating outflows as loans priced at high rates and inflows as deposits priced at low rates — effectively transferred a significant portion of the Spanish tax base to the Netherlands through the rate differential. The Taxpayer’s expert report was given limited weight, as it did not engage with the specific contractual and structural documentation of the Bunge pool and expressed only generic theoretical propositions.
Tribunal Supremo · 15 July 2025 · Sentencia núm. 985/2025 · doctrine fixed
The Taxpayer brought a recurso de casación before the Tribunal Supremo, which admitted the appeal on the basis of objective casational interest: the proper application of the CUP method to cash pool transactions had not been settled at Supreme Court level. The two certified questions were whether symmetrical rates are required for amounts deposited into and drawn from a cash pool, and whether the group credit rating rather than the individual entity’s standalone rating applies.
The Court confirmed that a cash pool is an atypical, mixed commercial contract combining elements of reciprocal lending, current account, and commission arrangements, without specific statutory regulation. The analysis must be conducted under a dynamic interpretive approach with the OECD Transfer Pricing Guidelines 2022 (Chapter X) as the operative framework. On the functional analysis of BFBV: the pool leader does not decide which entities receive funds, cannot refuse contributions, holds no economic or legal title to the liquidity it channels, and assumes no credit risk. Its function is purely administrative coordination. The OECD Guidelines paragraphs 10.129–10.131 confirm that such an entity should be remunerated as a limited-function service provider — not through a rate differential that treats it as a financial institution capturing the full spread between deposit and lending rates.
In Fundamento de Derecho Cuarto, the Court fixed doctrine: in the concrete circumstances of the case, application of the CUP method to financing operations in a centralised treasury management system requires that the interest rate on amounts deposited into and drawn from the pool be symmetrical, and that the credit rating applicable to loan operations be that of the group, not that of the individual borrowing entity.
ajiho commentary
The doctrine is binding — but the Court was careful about how far it reaches
The Tribunal Supremo fixed doctrine in unambiguous terms: symmetry required, group rating applies. But the precise language of Fundamento Cuarto matters. The Court said ‘en las concretas circunstancias del presente recurso’ — in the concrete circumstances of this case. That qualification is deliberate. The Court had already noted in an earlier casación (rec. 1878/2022, October 2023) that the singularities of cash pooling contracts make it impossible to formulate doctrine that projects onto every contract of this nature.
The concrete circumstances here were a zero-balancing physical pool; a pool leader with no personnel of its own, no economic title to the funds, no decision-making authority over allocation, and no credit risk; daily sweeps; and a pricing structure that generated a large rate differential flowing to the Netherlands. Those facts drove both conclusions. A pool leader with genuine, separately-charged treasury management functions would present a materially different functional profile. What the doctrine answers definitively is what happens in the Bunge fact pattern — and the TEAC’s October 2025 decision in XZ España shows that authorities will apply it aggressively to any pool where the leader’s profile resembles BFBV’s.
Three levels, one consistent analysis
The Bunge correction ran from AEAT inspection in 2015 to Supreme Court judgment in July 2025 — a ten-year dispute. At every level the result was the same and the reasoning materially identical. It was not a close case that turned on a disputed factual finding. The functional analysis of BFBV was not seriously in doubt once the inspection obtained the actual contractual documentation, and the Taxpayer’s expert report failed because it did not engage with those documents. The practical consequence for groups defending pool corrections in Spain is that a generic expert opinion on arm’s length pricing will not be sufficient; the analysis must engage with the actual contractual structure, the actual functions performed by the pool leader, and the actual risk allocation as documented.
The OECD 2022 Guidelines are the operative framework — and they cut both ways
The Court applied the OECD Guidelines 2022, Chapter X explicitly — not as a policy aspiration but as the interpretive framework for the Spanish arm’s length standard. Paragraphs 10.129–10.131 were cited directly: the pool organiser’s remuneration depends on functions performed, assets used, and risks assumed; where those are limited to coordination and agency, remuneration should be correspondingly limited. The Guidelines therefore do not mandate symmetry in all circumstances — they mandate appropriate remuneration for actual functions. A pool leader that genuinely performs additional functions could in principle justify a different outcome under the same framework. The Court left that door open, but the functional bar is high and the documentation requirements are exacting.
What this means for your business
If you operate a cash pool with a Spanish participant and an asymmetric rate structure, the doctrine is settled at Supreme Court level: symmetrical rates are required where the pool leader’s functional profile matches BFBV’s. If your pool leader performs only administrative and coordination functions — no personnel, no risk assumption, no discretionary allocation decisions — asymmetric pricing is indefensible in Spain. Review your pool pricing now, not at the point of receiving an inspection notice.
If your pool leader has genuine treasury management functions — active liquidity optimisation, external funding decisions, documented risk assumption, dedicated personnel — the functional analysis may support a different conclusion. But that analysis must be built into your transfer pricing documentation now, with specificity. Generic claims of value-added treasury management, unsupported by functional evidence, will receive the same treatment the Bunge expert report received.
If you are using your entity’s standalone credit rating in a Spanish pool, the group credit rating applies. That conclusion follows from the mutual structure of the pool — lender and borrower functions reside in the group as a whole. If your current documentation uses the standalone rating, the pricing methodology needs to be revisited before an inspection commences.
Case reference
Bunge Ibérica SA v Administración General del Estado · Tribunal Supremo, Sala de lo Contencioso-Administrativo, Sección Segunda · Sentencia núm. 985/2025 · 15 July 2025 · recurso de casación 4729/2023
Ponente: Excmo. Sr. D. Isaac Merino Jara. Primary source: official Tribunal Supremo judgment, ECLI:ES:TS:2025:3721. Lower instances: TEAC resolución 00/05536/2018 (8 October 2019); Audiencia Nacional SAN 2118/2023 (23 October 2023). OECD Transfer Pricing Guidelines 2022, Chapter X, paragraphs 10.109–10.123, 10.129–10.131, 10.146–10.147.