This is the type of question an employer or interviewer will ask when you have a lengthy track record in a particular industry. Depending on the circumstances of the economy or your age, the word “now” in the question could indicate that your inquisitor thinks “now” may not be the right time for such a transition. One could ask their interviewer why they feel now is not a good time to make a change, but that could come off as argumentative. Tell the employer that you have transferable skills, and mention a few, that are very applicable to this new pursuit. Stay positive about your reasons for wanting to make a career change. This could include that you feel you went as far as you could in your previous field, and although you are prepared to try something different you are confident that you can make a viable contribution to this new endeavor.