Costco’s credit card partners change from time to time based on fee negotiations: Costco in the US switched from American Express to Citi/Visa in 2016. Costco

Costco’s credit card partners change from time to time based on fee negotiations: Costco in the US switched from American Express to Citi/Visa in 2016. Costco in Canada switched from Capital One/Mastercard to CIBC/Mastercard in 2022.