Taxes on margins are mainly used when reselling used products in second hand stores for example. This can easily be done by creating a new tax as shown below.
NB: For the sake of simplicity, I will not adapt the tax grid, nor adapt the accounts.
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Make sure the cost amount has been defined on the product
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Go to Accounting > Configuration > Taxes and create a new tax. You can duplicate an existing one or create one from scratch.
- Select the tax computation as Python code, and define the computation at the bottom of the configuration screen.
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Adapt the percentage value to the tax amount you would need. Ex. For a 7% tax rate, use result = (price_unit - product.standard_price) * 0.07
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Adapt the percentage value to the tax amount you would need. Ex. For a 7% tax rate, use result = (price_unit - product.standard_price) * 0.07
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When creating a Sales Order, you will see that the 21% tax is not computed based on the sales price, but on the 100€ margin I made on this item.
Hello, i am interested by your answer.
Unfortunately the image are not visible, could you reload them ?
Thanks !!
Hello Rayane, I just uploaded new screenshots. Hope this helps!
Thanks a lot ! Very useful :)
Very useful post @kha, thanks! By the way, it is required to have installed module "account_tax_python" to be able to find the Phyton Code option as a tax computation.
Thanks for your input!
Hello Kevin.
Thank you for your contribution. I wanted to add some more information on that atter
- Do not forget to add "* quantity" at the end of the expression so that it applies to sales with more than one item sold. See below
- Furthermore, there are two possibilities : Tax included prices and tax excluded prices.
Here are the expression for the two :
Tax excluded prices
- result = (price_unit - product.standard_price) * 0.21 * quantity
Tax included prices
- result = ((price_unit - standard_price) -((price_unit - standard_price) / 1.21)) * quantity
- In this case, you would need to check the box "included in price" in the "advanced options" tab of the tax
Why don't I have "python code" when I open the drop-down menu ?
Hey, It s working well on V16 but on the V17 i have this message ovr and over again: "Erreur : : "name 'standard_price' is not defined" while evaluating
'result = (price_unit - product.standard_price)*0.21'"
@juba, it's not working "Erreur : <class 'NameError'>: "name 'standard_price' is not defined" while evaluating
'result = (price_unit - standard_price)*0.085*quantity'"
Hello Rayanne,
you can try using the right field name: (price_unit - product.standard_price). In his formula JUBA likely forgot the "product" attribute before the field
Hello,
Your salution is based on a "fixed cost", it is not real. The same item can be bought at 1$, and at 2$ from another provider or at any other time ( prices go up and down ).
To implement a real taxes on margin you have to make use of serial numbers, and identify every item as unique, with a unique serial number, cost and sale price.
This is much more complex than this.
Hello Roberto,
We would be happy to hear your solution to this!
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