Ask HN: What's a good pay bump to ask for in switching jobs?

You make a decision using a baseline, and you can use surveys for that. Yet most of us are not really choosing from a number of jobs -- usually we're considering a specific offer.

Insteda, your current salary is a good baseline, because your current job is your BANA (Best Alternative to a Negotiated Agreement)

But while you're moving up to your next challenge, why not take a pay bump with that?

My question: Roughly how much more should I ask for?

It's gotta be >0%, because I've got my BANA, and it's the right time to take some risk.

But except in unusual cases, a 50% pay bump would look silly.

This article at FiveYearItch http://blog.fiveyearitch.com/2013/01/what-do-software-engineers-want.html says that their average for comfortable, anonymous, definitely non-desperate engineers is about +19%. Does that make sense? More?