Business analyst salary in top consulting firms typically ranges from $90,000 to $110,000 for entry-level positions. This base salary is often supplemented by performance bonuses, which can increase your total earnings significantly. Over time, as you gain more experience and progress in your career, you can expect higher salaries and additional perks, such as relocation assistance or profit-sharing for senior roles. While there are slight variations between firms, the earning potential is high, with further opportunities to boost your compensation through exceptional performance and advanced qualifications.