As you want to get the details of pay scale after BCA (Bachelor of Computer Application) so here is the information of the same for you:

Pay Scale (Tentative):
The company that you join also determines the remuneration, reputed and big companies offers better salary as compared to the companies that are not so reputed.
Programmer 225000 - 300000
Test Engineer 225000 - 275000
Network Engineer 225000 - 275000
Software Consultant 250000 - 300000
Software Engineer 300000 - 325000

For better opportunities you can do your MCA or MBA after completing BCA, this will fetch you senior positions in reputed organization.

You can also pursue Master in Science MS which is offered by many universities in India and abroad.

However you have to pass the entrance exam conducted by the respective university.