This question probably will not be asked until the
interviewer suggests a going salary rate for the position.
Be honest -- but do not forget that benefits count when totaling
your "salary package."
Remember that your income consists of not only your
salary, but also your benefits package. Figure out how much
your insurance, company car, vacation, and so on, are worth,
and add them to your salary.
Research the career field, the specific company and the
company's geographical location. You can find general
statistics on salary in the Statistical Abstract of the
United States. Rather than stating a specific dollar
amount, figure out a range that would be reasonable.
The interviewer probably has a salary range in mind
already. Try to find out what the going salary is in the
field, and even in the company, if you can. Avoid stating a
number, unless you are pressed to do so.
It's usually safe to say you'd like an increase that
keeps up with the cost of living. You should also
mention that your performance should be a major factor in
the decision.
Aim for something toward the middle of the range. If your
answer is 10, the interviewer may think that you're money
hungry. If your answer is 1, the interviewer may think that
you are insincere.
Most interviewers will not ask you this question, unless you
are interviewing for an internship. In this case,
remember that more employers offer unpaid internships than
paid ones. Try to discover, before the interview, if the
internship is paid or unpaid.
Elaborate. If your answer is no, let the interviewer know
now. Do not waste your time or the interviewer's if the
position requires that you move and you are not willing
or able to do so.