1) The main payment solutions used in Belgium are Bancontact/Mister Cash, online banks' payment buttons like ING Home'Pay, Belfius, and KBC CBC, and bank-based cards like Visa and MasterCard. 2) Bancontact/Mister Cash is the leading payment solution in Belgium, used for 32% of online transactions, as it allows users to pay online with their debit card. 3) In response to e-commerce growth, Belgian banks developed their own online payment buttons to allow customers to validate electronic bank transfers between accounts.