Expert Fee and Buffer calculator

News, chat and debate about the Betfair betting exchange.
Post Reply
User avatar
jamesedwards
Posts: 3920
Joined: Wed Nov 21, 2018 6:16 pm

I've spent some time working out the new structure and thought I would share my excel calculator.

The Expert Fee = ((gross P&L - buffer) * rate ) - commission generated

The Buffer = (commission generated / rate ) - gross P&L) + any buffer carried forward

Screenshot example:
z55.JPG

Excel file:
Expert Fee calculator.xlsx
This certainly helped me understand how the new structure works, especially the new buffer calculation. Hope it's helpful to others.


*sits back and awaits for errors to be pointed out* :lol:
You do not have the required permissions to view the files attached to this post.
Last edited by jamesedwards on Wed Jan 15, 2025 2:13 pm, edited 1 time in total.
User avatar
Euler
Posts: 26195
Joined: Wed Nov 10, 2010 1:39 pm

Thanks for this, it was on my list for a job this afternoon. But it looks like you have beaten me to it. I'll punch in some numbers and let you know if I see anything.
User avatar
Kai
Posts: 7051
Joined: Tue Jan 20, 2015 12:21 pm

Cheers James, saved me years of work there 😅
User avatar
jamesedwards
Posts: 3920
Joined: Wed Nov 21, 2018 6:16 pm

It's worth noting that the new 'gross P&L buffer' method nets out exactly the same as the old 'PC bank' method would have. It's just a different (and imo clearer) way of measuring the same thing.
User avatar
Euler
Posts: 26195
Joined: Wed Nov 10, 2010 1:39 pm

I've tested this extensively and it seems to work on all the scenarios I've put into it. You've saved me a few hours there!
User avatar
Derek27
Posts: 25157
Joined: Wed Aug 30, 2017 11:44 am

jamesedwards wrote:
Wed Jan 15, 2025 2:11 pm
I've spent some time working out the new structure and thought I would share my excel calculator.

The Expert Fee = ((gross P&L - buffer) * rate ) - commission generated

The Buffer = (commission generated / rate ) - gross P&L) + any buffer carried forward

Screenshot example:
z55.JPG


Excel file:
Expert Fee calculator.xlsx

This certainly helped me understand how the new structure works, especially the new buffer calculation. Hope it's helpful to others.


*sits back and awaits for errors to be pointed out* :lol:
Thanks James. Only just got my head around the calculation and started working on spreadsheets and database connection. Makes sense and that spreadsheet will help. :)
Revenant
Posts: 25
Joined: Fri Dec 20, 2024 2:09 pm

I'm in the same boat Derek, gonna have to get my head round re-coding my database to now cope with bringing all the bits and pieces together for the expert fee. Have we also lost the record showing the amount of markets the fee applies across? Pity if so as I liked to keep track of how many markets I'd done over the account lifetime to see if my efficiency had increased etc.
Post Reply

Return to “Betfair exchange”