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United Kingdom decisions
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Merchant Interchange Fee Umbrella Proceedings [2026] CAT 42 (06 May 2026)
The Competition Appeal Tribunal held that MasterCard’s multilateral interchange fees restricted competition by effect and awarded damages to merchant claimants.
Commercial and Interregional Card Claims I Limited ("CICC I") v Mastercard Incorporated & Others [2026] CAT 39 (29 April 2026)
The Competition Appeals Tribunal found Mastercard’s interchange fee arrangements breached UK competition law and certified collective proceedings for merchants and consumers.
Commercial and Interregional Card Claims I Limited ("CICC I") v Mastercard Incorporated & Others [2026] CAT 15 (02 March 2026)
The Competition Appeals Tribunal certified collective proceedings brought by CICC I against Mastercard concerning interchange fee arrangements and alleged competition-law infringements.
Merchant Interchange Fee Umbrella Proceedings [2026] CAT 11 (18 February 2026)
The Tribunal held that Mastercard and Visa’s interchange fee arrangements were anti-competitive, awarding damages to merchant applicants, with quantum to be determined later.
Merchant Interchange Fee Umbrella Proceedings [2025] CAT 81 (01 December 2025)
The Tribunal allowed the application, holding the interchange fee arrangements restrict competition and permitting collective proceedings to continue.
Merchant Interchange Fee Umbrella Proceedings [2025] CAT 79 (24 November 2025)
The Competition Appeal Tribunal certified collective proceedings brought by merchants over Mastercard and Visa interchange fee arrangements and held the case should proceed to trial.
Merricks v Mastercard Incorporated & Ors [2025] CAT 69 (31 October 2025)
The Competition Appeal Tribunal certified collective proceedings brought by Walter Hugh Merricks CBE against Mastercard and held the case could proceed to a damages assessment.
(UM) Merchant Interchange Fee Umbrella Proceedings [2025] CAT 37 (27 June 2025)
The Competition Appeal Tribunal held that card-scheme interchange fees restricted competition and certified collective proceedings to continue on quantum and damages distribution.
Walter Hugh Merricks CBE v Mastercard Incorporated and Others [2025] CAT 21 (10 March 2025)
The Competition Appeal Tribunal certified collective proceedings by Walter Hugh Merricks CBE against Mastercard over alleged interchange fee overcharging and approved further case management directions.
Commercial and Interregional Card Claims I Ltd ("CICC I") v Mastercard Incorporated & Ors (Ruling (Revised CPO costs)) [2025] CAT 1 (02 January 2025)
The Tribunal ordered Mastercard and the other respondents to pay the applicant’s costs of the revised collective proceedings order application, subject to detailed assessment if not agreed.
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