VAT & Interest on Overpayments

The UK Supreme Court’s decision in the long-running Littlewoods VAT case has brought finality to one of the most significant tax disputes in recent years, with major implications for both taxpayers and HMRC.

Littlewoods, a retailer, overpaid VAT on commissions paid to catalogue sales agents between 1973 and 2004. After HMRC repaid the principal VAT and paid simple interest (totalling £268 million), Littlewoods argued that this was not enough. They claimed they were entitled to compound interest - calculated on the time value of money - on the basis that HMRC had been unjustly enriched by the overpayments.

The claim for compound interest was valued at £1.25 billion!

The legal battle centred on two key questions: first, whether Littlewoods’ common law claim for compound interest was excluded by the statutory VAT regime; and second, whether EU law required the UK to pay compound interest as an “adequate indemnity” for the loss suffered.

The Supreme Court unanimously found for HMRC.

On the first issue, the Court held that Parliament, in enacting the statutory scheme for VAT overpayments, intended it to be comprehensive. Allowing a concurrent common law claim for compound interest would undermine the statutory limitations and protections built into the regime. The fact that the legislation did not expressly exclude such claims was explained by the fact that the type of claim Littlewoods made (relying on the 2007 Sempra Metals case) was not contemplated when the law was drafted.

On the second issue, the Court considered the 2012 judgment of the European Court of Justice (ECJ), which stated that taxpayers are entitled to an “adequate indemnity” for overpaid tax. The Supreme Court concluded that this does not require full reimbursement of the time value of money or compound interest. Instead, Member States have discretion - subject to the principles of equivalence and effectiveness - over the rate and method of interest.

The Court noted that simple interest is the norm across most EU countries and that the ECJ had not ruled this out.

The practical effect?

Claims for compound interest on overpaid VAT are now effectively precluded. The Supreme Court’s decision represents a significant win (and saving) for the UK government and clarifies that, at least for VAT, statutory simple interest is sufficient to meet both domestic and EU law requirements.