What are people in comparable positions with similar education and location making? The more tangible research you have to back up your request, the more likely you are to receive that for which you are asking. If you are looking for a new position in your current industry, use what you’re making now to help come up with a target value. If you are changing industries, you may have to temper your salary request due to your amount of experience. It may also be a good idea to bring along a few copies of your salary history of your current and past positions. This way, if the question is asked, you won’t fumble and start pulling numbers out of thin air.
When practicing for your interview, prepare as if you know this question will be asked. Rehearse it a few times with a friend or family member. Refer back to your research and it may even be helpful to bring along a copy to your actual interview for your reference.The more smoothly you are able to answer this question, the less likely it will be to trip you up. It will also show your potential employer that you have done your research and you've prepared for the interview.
While it's important to be paid what you're worth, you also want to be accommodating to your potential employer. Having a very specific salary in mind may make you seem like you're not willing to have a discussion and cause you to lose out on the job. Come prepared with a salary range as this will be a clear answer for the question, but will still leave room for negotiation down the line. You should also remember that