Would applying to a boarding school be a bad idea for an incoming junior?

Even though I already go to a private day school (currently a sophomore), I’m considering applying to a boarding school for multiple reasons. Would this negatively impact my college admissions chances? Are there usually spots open?

No. Kids change high schools all the time for any number of reasons.

Usually? Yes, but not many, and the 11th grade slots are also very very competitive. Often the applicant decides it is more beneficial to apply as a repeat 10th grader.

Thanks for the advice! I was just worried about leadership positions, course conflicts, etc, and having to explain the transfer.