I'm currently doing a bit of financial planning for our startup - nothing serious just playing with some numbers to see how much money we'd burn if we hired a few more people and how much longer that means we could last for.

A question I'm interested in getting opinions on is how much "runway" a startup should typically look at having at any one time. This isn't really something I've personally paid attention to before but I want to give it at least some thought before I move back onto important stuff.

Perspectives welcome.