Max class level will be 10.
Level 1: 0 exp
Level 2: 1000 exp
Level 3: 3000 exp
Level 4: 5000 exp
Level 5: 7000 exp
Level 6: 9000 exp
Level 7: 11000 exp
Level 8: 13000 exp
Level 9: 15000 exp
Level 10: 17000 exp
Exp for classes will go up by using that class in fights and will gain the same exp as leveling your character