Which cards are supported by Splitit? March 16, 2022 14:34 Updated Splitit is supported by Visa, Mastercard, and depending on the merchant, American Express, Discover and UnionPay. Related articles Am I able to talk to you via live chat? Can I use my debit card to pay for my monthly installments? I didn't have enough money and the authorization or payment has not gone through. What should I do? Will I still be able to use my credit card for other purchases? Do I need to pay anything up front? Comments 0 comments Please sign in to leave a comment.