To try and illustrate the point I've spent most of tofay working on an Excel spreadsheet to calculate AOC costs.
It can be found
here.
I have tested it as well as can be expected in about 10 hours and it does bear out the figures sent to me by some AOC holders.
The future predictions after next year are made on an assumption that nothing changes and the current proposed scheme of charges is implemented.
The important bits are to enter your current charges and your current fleet size of multi and single engine aircraft.
The current charges matter as I read the implication in the document that you may be charged according to what you were charged last year and two seemingly equal AOCs
may end up paying different charges.
If anyone finds anything wrong with it let me know ASAP and I'l fix it.
Ignore the income and expenditure bits to do with operating aircraft, just the AOC bit has been tested.