Discount in payment method affects Shipping cost

-- HikaShop version -- : 2.2.3
-- Joomla version -- : 32.1
-- PHP version -- : 5.4.14
-- Browser(s) name and version -- : all
Hi, I have a banktransfer payment method with cost of -3% but this "discount" is aplied also to the Shipping cost.
Is there any way to apply this discount in the payment method only for the products?

Thanks in advance

I think this is a lack in some (or all) of the payment plugins. Sometimes you need the shipping costs included, for example when it's not a discount but an addition, because you need to cover payment costs like credticard surcharge (which is calculated over the complete amount). Order times it's a discount and you don't want to give discount to your shipping costs.

So it would be great if this was adjustable per instance of a payment plugin. Even better if this could be set in the configuration.

OK, I'm not happy with that, but for now I have to accept that I involuntary have to give discount to shippings costs, while I don't get discount to ship the goods myself. So I loose some there. Discount on products is good (there's profit), but shipping is a service, there's no profit on that.

But.... when I give a payment discount, there's a change at the VAT amount also. I don't see that calculated. I made an order and selected a payment method with 5% discount. Then I went back and selected a payment method with no discount. The amount of VAT shown at the last page of the checkout (right before I go the payment process) is the same in both scenarios. When I give 5% discount at the whole payment I suppose all amounts including VAT will go down with 5%. Is this a setting or is there something going very wrong?

That's not really what I mean. With each payment option I can add an amount or percentage for costs. I can also make it a discount by putting negative numbers there. That last option (discount) is what I want to talk about. When I give discount at certain payment methods, I give discount to the total sum of money people do have to pay for the products. Let's say I really want people to use iDEAL (a Dutch payment method) I could give 10% discount.

So when they order for € 1000,00 products there will be € 210,00 VAT added (I live in the Netherlands, our VAT is 21%). So they have to pay € 1210,00. Now they get to the payment method in the checkout process. They choose iDEAL. I give them 10% discount.

What should happen?
They pay € 900,00 for the products and get € 189,00 VAT added. Total € 1089,00 (€ 121,00 / 10% less)

What happens at Hikashop?
The discount is processed and the amount to pay will be € 1089,00. The VAT was € 210,00 and will stay € 210,00.
Conclusion: they will pay € 879,00 for the products and € 210,00 VAT. So they are paying 23,8% VAT, which is INCORRECT.

See the screenshots to prove it. I hope you understand my problem and that it's a real problem.
Furthermore I'm curious if other people have this problem?

Hi miracle. there is an option in configuration/tax -> Aply discounts -> before tax / after tax

@Cesarlab69: thanks for joining in and think about the solution. I really hoped your suggestion was the right one and I just had missed on of the many knobs I can turn on and off. But unfortunately it had no effect. It was already set at 'before taxes', changing it had no effect. I think because it has to do with discounts and the payment fee/discount is not seen as a real discount. I think it should, because I still have a VAT problem I can't explain to the tax administrator...