Anecdotally, i've always been counter offered - and i've left 4 jobs as a developer. Usually around 10% more, assuming you say your primary reason for leaving i

Anecdotally, i've always been counter offered - and i've left 4 jobs as a developer. Usually around 10% more, assuming you say your primary reason for leaving is monetary and 'advancement' of course. If you say you're unhappy because of behaviour x and y they'll probably think they can retain you just by changing those. You have to be up front. Edit: 2 of these were 'big companies', 2 were small (small business and a startup)