There are a fair number of questions like this on the baord of late: I have X experience, how much should I be paid?Experience is to my mind a blend of activity and variety. Depending on the firm you are with, your 1.5 years might have been spent on one project. Equally, you may have five or ten projects under your belt in that period.My point is, experience is not purely time-based.All other things being equal, I'd place more value on someone who's seen a few different problems and environments, as opposed to someone who has only worked on one three-year programme.Also, it's not clear what exactly your experience is in from your post.On balance, you may be worth what you are being paid.