How often can I apply to consulting firms? Can I apply now if I was rejected earlier this year? If I was rejected for a summer internship, can I apply again?

12-18 months is what McKinsey says, but this can vary by firm.

Some firms will say 6-12 months so they should check the email communication they received from the recruiting team. Also, some practice areas are different (e.g. McKinsey’s Marketing and Sales practice says 6 months).

You can apply for the same firm in the same year if you are applying to a different role. For summer internship, yes you may apply again.

You may also be allowed to apply for a full time role even if you were rejected for a summer internship role.