Re " As an aircraft owner I know how much time it takes. "
Me too Mr 'F',
Then try and argue with JAH over the number of T&G's....
Student / Hirer says 5, JAH says 7......who do ya think wins..??
And I operate only two aircraft.....
And for MartinCh,
Even the 20% or so is fairly 'transparent' to the client, But, for those organisations who do charge this little bit, they do have to cover the accountant's wages somehow....even I can understand that bit....
Over the year it all helps. If its of interest to you, I don't recoup this at all.
I just pay the invoice and pass it on - as is....
Cheers