1. Spanish Tax Treatment of Derivatives for Non-Residents

Under TRLIRNR - Texto Refundido Ley IRNR and ICLG 2026 Spain guide:

General rule: Income from derivatives transactions is categorised as a capital gain, subject to Non-Resident Income Tax at a rate of 19%. No withholding tax applies, but this tax treatment can be affected by tax treaties that might prevent Spain from taxing such gains. Notably, if the non-resident taxpayer is a resident of the EU/EEA, the capital gain is exempt from Non-Resident Income Tax according to Spanish domestic law.

Why then disputes?

1. Recharacterization Risk: Tax Authority (AEAT) tries to recharacterize swap payments as interest, royalty or dividend. If recharacterized, withholding 19% applies. Generally, no withholding tax applies - domestic exemptions referenced above but for interest / royalties paid to non-EU, WHT is 19% on gross.
2. Article 14.1 LIRNR exemptions: Capital gains from movable property obtained without PE by EU residents with effective exchange of information are exempt. Dispute is whether counterparty proves residency + beneficial ownership.
3. EU Interest & Royalties Directive: Incorporated in art 14.1 c), h), m) LIRNR. Provides exemption if beneficial owner is EU associated company (25% holding). This is where most ISDA disputes arise.

2. How ISDA Agreement Deals With Spanish WHT

Spanish transactions use two frameworks:

• ISDA - international approach: When one party is non-Spanish and/or the transaction is governed by foreign law, parties typically use the ISDA master agreement. English law remains most commonly chosen, although since Brexit there has been a trend towards Irish or French law.
• CMOF - national approach: Contrato Marco de Operaciones Financieras - Spanish law equivalent, same structure as ISDA.

Tax provisions:

Section 2(d) of the ISDA Master Agreement contains provisions setting out the consequences if a tax is imposed on a payment required to be made by a party under a transaction. Included is a gross-up obligation for certain "Indemnifiable Taxes".

• Section 2(d)(i)(4): All payments are made without withholding or deduction unless required by law, and (where withholding IS required by law and the Tax is an Indemnifiable Tax) a gross-up is required.
• Section 3(e) / 3(f): Payer Tax Representation and Payee Tax Representation. Payer promises it does not have to withhold as long as Payee Tax Representations are correct and Payee has furnished forms under Section 4(a).
• Section 14 definition: "Indemnifiable Tax" means any Tax other than Tax imposed by reason of payee's connection with taxing jurisdiction. So Spanish IRNR imposed on non-resident payee IS Indemnifiable Tax for Spanish payer -> Spanish bank must gross-up.
• Spanish Market Practice: In Schedule Part 2(b), parties typically disapply gross-up for Spanish IRNR if Payee fails to deliver certificate of residence / EU exemption form. For equity derivatives, legal opinions typically given when ISDA framework is used, to confirm validity and enforceability of foreign law and potential withholding tax when dealer is foreign entity.

CMOF equivalent: Clause 8 of CMOF Anexo de Definiciones - same gross-up but limited to "Impuestos Indemnizables". Spanish banks add language: No gross-up if exemption available under Art 14.1 LIRNR or Treaty and payee fails to provide documentation.

3. Leading Case Laws - Where Disputes Actually Litigate

A. Beneficial Ownership - Supreme Court Denies Treaty + Directive

Tribunal Supremo, Sentencias 21 Oct 2020 (Rec. 4800/2017 and others) - Interest/Royalty Directive primacy case

This is the most cited case for ISDA swaps linked to IP or intra-group financing.

In a recent and controversial judgment, the Supreme Court affirms that when the Interest and Royalties Directive cannot be applied because the recipient of the royalties is not the "beneficial owner", the withholding tax rate established in the Spanish domestic non-resident income tax regulations must be applied, rather than the reduced rate of the corresponding Tax Treaty.

Facts: Spanish company paid royalties to EU conduit (Dutch/Luxembourg) that was not beneficial owner. AEAT denied Directive exemption AND denied US Treaty 10% rate. Supreme Court confirmed:

Position of the Supreme Court...European legislation takes precedence over bilateral agreements on withholding tax and that – when a transaction is subject to the Interest and Royalty Directive but is not eligible for the exemption because the recipient of the payment is not the true beneficiary – the reduced rate under the bilateral agreement cannot be applied either

Relevance for derivatives: If a swap payment includes a royalty component (e.g., total return swap on IP, or structured note where coupon is recharacterized as royalty for transfer of client data), Spanish court applies same logic. In STS 16 Jan 2023 (transfer of client and operational data), Supreme Court had to analyze whether for purposes of withholding Spanish taxes, payments by a Spanish company to a non-Spanish company in consideration for the "assignment" of customer and operational data trigger taxable event as royalties - held yes, it is royalty.

Impact on ISDA: If your swap counterparty is a conduit SPV in Netherlands/Ireland, Spanish payer cannot apply Treaty fallback. Gross-up will be triggered under 2(d) and payer bears cost.

Limitation Case - STS 2021 confirms limits to dynamic interpretation: Finally, the Court was critical of the position of the Spanish tax audit and the National High Court that the reduced withholding tax rate in the Spain-US Tax Treaty was not applicable either. The Supreme Court determined that it is not acceptable to deny the benefits of a tax treaty based on lack of beneficial ownership and the indicia that the actual beneficial owner is resident in a third jurisdiction (the US) and then deny the application of the tax treaty with that third jurisdiction

So Supreme Court says: You cannot deny Dutch treaty for lack of BO and then also deny US treaty with real BO.

B. Dividend Equivalent in Equity Derivatives - Foreign Funds WHT

STS 5, 11, 25 April 2023 - 5 judgments + Audiencia Nacional 2024

The Spanish Supreme Court has opened the door, for the first time, to recovery in Spain by non EU Investment Funds which are comparable to qualifying Spanish resident Investment Institutions, the amount of any withholding taxes borne in excess of the final taxation (at 1%) paid by said resident Institutions

The Supreme Court rules that the differential treatment of dividend withholding tax for...

Facts: US / non-EU funds receiving Spanish dividends (and dividend equivalents under equity swaps / TRS documented under ISDA) suffered 19% WHT, while Spanish IICs taxed at 1%. Court held this violates free movement of capital (Art 63 TFEU). Allows reclaim of excess WHT.

Relevance: For equity total return swaps, TRS payments that reference Spanish dividends are often subject to 19% WHT on the manufactured dividend. Now non-EU fund can claim refund if comparable to Spanish fund. AEAT previously justified withholding arguing it did not have... but Supreme Court rejected.

Audiencia Nacional 23 Jan 2024 (Foreign Investment Funds): The Tax Agency justified tax withholding by arguing it did not have... Supreme Court stated... withholding tax applied in Spain has been neutralized if the company can deduct it in its country of origin up to the limit of the difference in treatment - creates credit limitation test.

C. Insolvency & Close-out Netting - Impacts WHT on Close-out Amount

STS 18 November 2015 - clarified that swap agreements fall under RDL 5/2005 regime only if the netting agreement covers multiple financial transactions.

If single swap, protection against insolvency not available - close-out amount may be recharacterized as ordinary claim, and any embedded WHT gross-up may be challenged by insolvency administrator as harming estate. RDL 5/2005 establishes privileged insolvency regime allowing parties to enforce a single settlement for all hedging transactions and permits termination based solely on insolvency declaration.

4. Typical Dispute Pattern in Spain under ISDA

Scenario: Spanish corporate enters into cross-currency interest rate swap with non-resident bank (London Branch) under English law ISDA.

1. Spanish corporate pays floating EURIBOR + spread. AEAT audits and says part of payment is Spanish source interest subject to 19% WHT because London Branch is acting through Spanish PE or because beneficial owner is non-EU parent.
2. Bank invokes Section 2(d) - demands gross-up as Indemnifiable Tax.
3. Corporate argues Payee failed to deliver Form 210, certificate of residence, and Form to claim Art 14.1 exemption, so gross-up disapplied per Schedule.
4. Court looks at beneficial ownership + documentation compliance. Since 2020, courts apply Directive primacy over Treaty - so if conduit, no Treaty relief.

Mitigation used by market:

• Schedule Part 3(e) - list exempt jurisdictions
• Require delivery of certificado de residencia fiscal + declaración de beneficiario efectivo within 30 days
• Include "No gross-up for failure to provide exemption documents" - enforceable under Spanish law as overriding mandatory provisions do not apply to ISDA/CMOF between professionals
• Use CMOF for Spanish counterparties to avoid foreign law characterization risk and qualify as financial collateral under RDL 5/2005