The salaries in finance depend on the size of the company that hires you, the departement which you will work in and also your final diploma (Bachelor, Master, Phd). You also need to know that companies in Luxembourg offer on top of salary additional benefits (like meal vouchers, company insurance, cars, 13 months payment) and, sometimes, bonuses as well.
Please find below the salary grid for graduates starting in
Advisory / Consulting
You can use the salary calculator to define your possible net salary -> net salary calculator