Do yourself a favor – don’t ask about commission until the very end of the interview. Your commission split may be negotiable and dependent upon how the manager has determined what your business growth rate will likely look like in the next six to 12 months. Asking this question too soon in your interview can be detrimental; you may unknowingly set yourself up for disappointment when you force the manager to provide you with a low-risk response before either of you have a chance to understand what you can offer to each other.