I actually do have other items I could negotiate, like work from home and flex time possibilities, lots of paid time off, so if employer were to offer 10% instead of 20%, I might be willing to consider it, and ask that the 20% target be achieved eventually over time (phased in six months instead of at once). My thoughts at this point are that it is my responsibility to ask, but I'm open about being offered little less than what I ask for.