Hello, for invoices it is possible to set a discount for each entry. There are three ways to treat a discount regarding taxes, depending on how discount_how is set: PRETAX, SAMETIME and POSTTAX. A little example: Lets consider an invoice with 10 items, the price is $100, which gives as raw amount $1000. Further lets assume that the tax is 10%, and that the given price is without taxes (taxincluded is 0). The discount shall be $10, which means that the discount_type is VALUE. Depending on discount_how, we get:
* For PRETAX, the discount of $10 is subtracted from the raw amount, which yields a net amount of $990. The 10% tax is $99, and we get a gross amount of $1089. This is the way Gnucash does it. * For SAMETIME, the discount and the taxes are calculated independently from the raw amount. The net amount is $990 after subtracting the $10 discount, but the 10% tax is taken from 1000%, which is $100 taxes. The gross amount is $1090, and again Gnucash does it this way. * Now for POSTTAX, IMHO, first should be calculated the gross amount without discount, which is $1000, plus 10% of $1000, i.e. $1100. Now we subtract the discount of $10, and we get the final gross amount $1090. Finally to get the correct net amount, we invert the equation gross = (1+perc/100) * net, and get net = gross / (1+0.1), which is $990.91, and the tax is $99.09. But Gnucash does not work this way, it gives the same result as for SAMETIME (I use 2.2.3-1)! Hence first my question: Why does Gnucash the same for SAMETIME as for POSTTAX, is there something wrong for my considerations? And a remark: For SAMETIME, in the end the paid tax is not 10% of the net amount. This can be o.k., e.g. for a discount which cannot be taxed. But for POSTTAX, I expect the tax rate to be 10%. For example, if one gives a customer a discount for the paid gross amount, this should be taxed correctly. Best Regards, Roman _______________________________________________ gnucash-devel mailing list gnucash-devel@gnucash.org https://lists.gnucash.org/mailman/listinfo/gnucash-devel
