Summary of the Judgment

Factual and Procedural Background

The case concerns the United Kingdom tax treatment of income streams called “manufactured overseas dividends” (MODs) arising under stock-lending agreements entered into by a tax-exempt pension fund. The fund, acting through its corporate trustee (“Plaintiff”), lent large volumes of overseas shares between the 2002/03 and 2007/08 tax years. Under the relevant statutory regime (Schedule 23A to the Income and Corporation Taxes Act 1988), borrowers—UK-based authorised intermediaries (“Company A” and others)—were obliged to deduct a sum equivalent to foreign withholding tax (the “MOD withholding tax”) from the manufactured dividend they paid to the lender and to account for that sum to the UK tax authority (“Defendant”). Plaintiff asserted that this deduction operated as an unlawful restriction on the free movement of capital under Article 63 of the Treaty on the Functioning of the European Union. The First-tier Tribunal rejected the claim, the Upper Tribunal and the Court of Appeal allowed it, and the Defendant appealed to the Supreme Court. The present opinion resolves that appeal.

Legal Issues Presented

1. Whether the MOD tax regime constituted a restriction on the free movement of capital contrary to Article 63 TFEU.
2. If a restriction existed, whether it was justified under EU law.
3. If unjustified, what remedy—repayment of the MOD withholding tax or some lesser relief—was appropriate.

Arguments of the Parties

Plaintiff's Arguments

• The deduction of MOD withholding tax left tax-exempt lenders with a lower net return on overseas shares than on UK shares, thereby dissuading investment and infringing Article 63.
• The entire amount deducted constituted tax on the lender’s own income; consequently, the appropriate remedy under San Giorgio principles was full repayment with interest.
• No justification defence was available because the regime was neither necessary to prevent avoidance nor required for fiscal cohesion.

Defendant's Arguments

• The only unavoidable disincentive arose from foreign states’ withholding taxes (“juridical double taxation”), which EU law accepts; the UK regime merely replicated that outcome and imposed no additional restriction.
• MOD withholding tax was a liability of the borrower, commonly extinguished by set-off credits, so no UK tax was levied on the lender and no sums were received by the Defendant; therefore, a restitutionary remedy was unavailable.
• Even if there were a restriction, any relief must be limited to the actual economic loss attributable to the regime, not the full amount of the credits claimed.

Table of Precedents Cited

Court's Reasoning and Analysis

1. No additional restriction. The Court accepted the First-tier Tribunal’s market-based analysis: under standard stock-lending contracts the lender’s manufactured dividend is expressly limited to what it would have received if the shares had been retained—namely, the gross dividend less foreign withholding tax. That reduction is attributable to foreign tax, not to the UK regime.

2. Ineffectiveness of MOD withholding tax. The MOD withholding tax is levied on borrowers, not on lenders, and is normally extinguished by set-off credits so that the Defendant receives no cash. Consequently, it neither enriches the Defendant nor impoverishes the Plaintiff.

3. Dividend-arbitrage argument rejected. The Court of Appeal had reasoned that, without the MOD regime, lenders might share in borrowers’ dividend-arbitrage gains. The Supreme Court found this speculative; any sharing of such gains is negotiated through the lending fee, which is unaffected by the tax rules.

4. No breach of Article 63. Because any dissuasive effect stems solely from unavoidable foreign withholding tax (“juridical double taxation”), the MOD regime does not impose an additional barrier to cross-border investment.

5. Alternative ground—remedy disproportionality. Even assuming a minor breach existed, the Plaintiff sought repayment of all credits (≈£8.8 million, potentially £600 million market-wide). Relying on the extended San Giorgio principle as interpreted in BT Pension Scheme, the Court held that EU law only requires compensation proportionate to the specific loss caused by the infringement. The Plaintiff had neither pleaded nor proved any such quantified loss; therefore, the restitutionary claim failed.

Holding and Implications

Appeal ALLOWED; Plaintiff’s claim DISMISSED.

Implications: The judgment confirms that the UK’s former MOD regime did not breach Article 63 and that restitution under the extended San Giorgio principle is confined to losses directly attributable to an infringement. The decision forecloses claims estimated at over £600 million from other tax-exempt lenders and clarifies the limits of EU-law-based repayment actions where the UK has neither levied nor retained the disputed sums.