Greetings 🖖 :)
Fresh graduates should apply to MBB and Big 4 firms during the fall of their final year, typically September to November. Most firms begin interviews before graduation for roles starting post-degree.
MBB: Recruitment is concentrated in early fall, often with rolling deadlines.
Big 4: Multiple recruitment rounds occur, but most full-time roles are filled through fall campaigns, especially for candidates with prior internships.
I suggest you to start preparing and applying in early fall to align with the main hiring cycle and maximize your chances. By preparing I mean: create a great CV and cover letter (if the office requires the latest) and start learning about case interview / selecting potential stories for the behavioral session.
Good luck!
Best,
Mari