Abstract: This disclosure relates generally to payment cards management systems, and more particularly to credit limit management system and method. In one embodiment, a system comprising: a memory storing instructions, and a processor configured by instructions to determine, during a billing period, an unused credit limit in a fixed credit limit for current month, the unused and fixed credit limit are unique and specific to a payment card, obtain parameters specific to the payment card comprising at least one of an account parameter, a policy parameter provided by a payment card issuing authority, a payment parameter, a spending factor, and a fiscal parameter, compute a credit limit adjustment score based on the parameters and unused credit limit, and set the fixed credit limit to a credit limit for a succeeding month based on at least a portion of the unused credit limit, the parameters and the credit limit adjustment score.