Trending @Capgemini; Joined as a Associate Software(A3). So while promoting to Assiciate Consultant (B1), how much increment amount we should get?

Depends on lot of factors
Firstly you aren’t getting promoted from A3 to B1 So one step at a time
A3 to A4 expect around 20% Then A4-A5 around 10-15% Then A5-B1 around 6-12%