So we have covered the basics of how to benefit from the bookmaker offers and how to use a betting exchange to achieve this (if you still require further clarification have a look at arbitrage betting or matched betting via google as the principle of backing and laying a bet is the same).
We will now look at how to use the refund calculator (this is an Microsoft Excel spreadsheet, if you don’t have a copy of Excel you can download a free Excel viewer from Microsoft here).
Once you open the calculator tool you will be greated with a basic spreadsheet which we will use to calculate the lay bet required at the betting exchange. A screenshot of it is displayed below:
Using the example of the bet in Part 2 of the guide the spreadsheet will be completed as per the screenshot.
The stake of £10 will be entered into the Stake box, along with the back odds (bookmaker odds in decimal) 7.0 and the available lay odds at the betting exchange of 7.2.
The spreadsheet will then calculate all the remaining information required in order to calculate the lay bet required at the betting exchange.
In the example shown you can see the winnings if the bet was to win (back return), the lay risk (the amount of funds required at the betting exchange to place the lay bet) and the lay stake (the amount required to lay at the betting exchange in order to achieve the same result regardless of the outcome of the match).
The spreadsheet is designed to calculate the lay stake in order to give the same result regardless of the outcome and in the example you can see if the bet wins you will be left with £9.30 of the initial £10 (a 70p loss) based on winnings of £70 less £60.70 paid out on the lay at the betting exchange.
If the bet loses then the lay amount would be paid out (lay stake of £9.79 less 5% commission = £9.30).
Thats about it really, feel free to add comments to this post in order to ask any questions (i can then update this post to cover anything missed). You may need to read the guide again and/or do a small test to fully understand but after having a go a couple of times it will become easy.
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