How to put internship on resume before starting?

I think there's a bit more time before the BBs open up their apps (July 15 for Goldman and JPM I think), so you don't have to worry about it quite yet; that said, you could just list it and say "will" in front of everything for clarity.

If you can put it into a cover letter, that might be a way around it.

Otherwise, as MusicCityBoer said, put it in future tense and clearly point out when you'll be doing the internship.

Incoming internship it's like saying incoming analyst.

I talked to a recruiter at a bulge-bracket about this exactly, and she said to list it as you normally would but put Incoming in parenthesis next to the title. That's what I did, I also don't have any descriptions/bullets yet because I'm not sure what my exact projects will be.

There are a few good threads on this topic already. I was talking to a director at BAML Lev Fin and he said just to do it, just make sure its clear that you are incoming and make sure to update them with a new resume.

You could list it as an incoming summar analyst/intern and then choose bullets from the job description that you want to emphasize. I don't think that would be an issue.

Draft some bullet points about what you think you'll be doing. Refine/add as you can - as soon as you can - but don't submit your apps to the banks as early as possible just BC their apps are open. They will do on-campus recruiting if you're at a target.

Would it be strange to simply put "Europe" as the location of the internship? I am interning at very small regional division of a known boutique and as I am applying to London, it is likely that somebody knows someone from that division, which I want to avoid.