Philosophy majors are predicted to have higher average starting salaries than graduates in any other humanities major, reports the National Association of Colleges and Employers in its 2016 Salary Survey:
Philosophy majors are projected to earn an average starting salary of $49,000 (See Figure 1). This is up from last year, when projected salaries for philosophy majors reported in NACE’s Winter 2015 Salary Survey averaged $46,067.
More info here.
UPDATE: Alfred MacDonald looked at the report and points out (in a comment below) that the humanities data is based on 46 self-selected respondents, and so should be taken with a tablespoon of salt. One would think that the National Association of Colleges and Employers would do a bit better.