Theres loads of things you have to consider when having a crash and making an insurance claim. Depends how old you are, how many no claims you have, how many times you've claimed before, how much your excess is etc? And in any situation, unless you have a protected no claims, your insurance will most definately go up. Might be like a 20-30% increase with a higher excess for example.

If you can afford it try and get their car done privately then save up and get yours done too. It helps in the long run, just not the short run