[aigel]

I would worry that they already made you a written offer. Did you agree to any terms for that, before they went through the hassle of writing it? Every job that I got we always negotiated the terms ahead of time and the written offer was crafted once the terms were mutally agreed upon. I would NOT go back with more requests, if that is what you did. If they just sent it to you without negotiations, then by all means, go for it. That said, go for it on the phone, not in a written counter offer. Much more personal that way.

Do you only have 2 weeks vacation now? Or more? If you have more, ask for a match at the new company. This is often available, especially to mid-career folks.

Finally, in terms of the size of the sign-on bonus, it probably varies by industry and your base. 10-15% is adequate, if it is an industry with competition for talent.

HTH,

George