Dynamic payment cards and related dynamic payment card management systems and associated methods are disclosed that allow for the efficient management of corporate purchasing needs. The dynamic payment cards can be traditional payment cards with card control settings that are dynamically managed. In addition, a dynamic card management system can automatically interface with card processor systems to dynamically modify these card control settings, and a purchasing management system or other request and approval workflow engine can provide an interface between a company and the dynamic card management system. More generally, an advantageous solution for purchasing management is disclosed that utilizes dynamically or actively managed approval parameters to help control transaction authorization determinations associated with purchasing mechanisms. These dynamic approval parameters can be generated and/or managed through the application of configurable company purchasing policies and rules, and these dynamic approval parameters can be stored, for example, by a processing system that makes authorization determinations when transactions are initiated using the purchasing mechanisms.