Is it compulsory to pay bonus to all employees? What is the minimum & maximum %?

Yes Thanks for the information...
still i need to claer that...
There are person with different category of Basic + DA Like 3500, 6000, 8000
Should we need to take 3500 for all calculation or we need to take 6000,8000,sa per
Basic + DA.
Please any one clear me on this
Regards,
KarthiK

Sir,
will you please provide the method to maintain registers a & b in detail as it is the requirement of labour inspector.
Thanks.