Mine are an hour (60 minutes) but sometimes he goes over by 10-15 minutes, which I really appreciate. I tend to be the last appointment of the day so he doesn’t often have anyone after me.

I can understand why your situation annoys you, it would irk me too if my T ended earlier than the agreed time, especially since you pay for every single one of those minutes. Given my personality, I think I’d be too anxious to bring it up though. Would you find it easier to email your T about this rather than saying it face to face?