DS has weekly music lessons, his teacher comes to the house as she doesn't teach from home. This works for us as it is so convenient. DS has a lot on over the next few months, so we have decided to put the music lessons on hold as he will not have time to adequately practice, and there are too many other things for both he and I to keep on top of.
I contacted his teacher to let her know, and offered to pay a retainer to keep his space free so that he can resume in four months' time (beginning of February).
She is fine about this and agrees that it is sensible to take a break.
Now for the retainer. The lessons would have been weekly on a certain day, and, depending on which month it is, there could be five of those days in a calendar month or four. She suggests that the retainer fee be paid calendar monthly, and be the full price of four lessons per calendar month.
Is this a reasonable sum? I understand that she will not be able to fill his slot, and that would make her out of pocket. That obviously needs to be compensated for. I offered to pay the retainer because I knew this. But is the amount reasonable?