Learning how to pay NBI using GCash is straightforward and convenient for applicants who want to complete their NBI Clearance payment online. After registering for an NBI Clearance application and obtaining a reference number, users can open the GCash app, go to Bills Payment, select NBI under Government billers, enter the required details, and confirm the transaction. This method provides a quick and secure way to settle the payment and proceed with the NBI Clearance process without visiting a physical payment center.