I think the question being asked is a finer one than responses here suggest. OP knows NCP step’s income will be included, OP is asking HOW MUCH it will affect the package.
It’s a valid question. Probably not as much as a bio parent’s income will be. But more than if that bio parent were single. In my family, both of my steps had kids from previous marriages too, and that didn’t seem to be explicitly taken into account in the forms. But I imagine it is taken into account, in some way.
If the FA office will answer specific formula questions like this, great. If not, OP can roll the dice and apply…the bigger risk is of course, not getting in…I think Columbia’s admit rate is well under 10% now, right? Like 6?