Clearancejobs.com published the following infographic highlighting the worth of having a security clearance. They surveyed 11,436 of the 4+million professionals who have security clearance. The survey ended in 2012, so the numbers have not been updated since then, but it does show that professionals with graduate degrees and security clearance rank the highest in regard to pay and that engineering and IT professionals with clearance receive the highest compensation. So if you are thinking about going for that clearance, it might pay to do so.