Hi,
Bonus is turnover profit that a company shares with its employees. This can be shared as a "festival bonus" or Annual Bonus, whose percentage is fixed, minimum being 8.33% or Rs 2800 (as per Bonus Act). For CTC sake, the minimum annual bonus can be broken up and shown as a monthly component if it is a fixed one.
But I guess you are confusing it with Monthly Incentive, which is purely target-based and performance-driven. This cannot be clubbed with the salary component as it is a variable concept altogether.
Hope this is clear!
Regards,
VJ:-P