pitch raising survey

[Staccatomusic@cs.com]

Just wondering, at what point do techs start charging for pitch raises? (or 
lowering)
I always include a little pitching in my standard tuning fee but what is a 
little? I believe if a customer has failed to keep the piano tuned they need 
to pay for the extra work. It is normally expected for the pitch to drift 
some between schedule tunes but how far until we start charging for those 
pitch fees? Care to comment?
BP