Magento 1.9 group price incorrectly calculated for simple products

Question

We appear to have an issue with customer group pricing discounts on simple products. We have a 25% discount customer group with the following configuration in 'Catalog Price Rules':

This appears to be correctly calculated in admin

But in the front end, only for simple products, we are not seeing the same price

As you can see here, configurable product options are ok

What could I possibly be missing here?

Answer 1

Is the 1st image photoshopped? Since I see double fields for discount % and how it's applied... or is the functionality extended by a custom module?

If I understand you correctly, you just want a 25% price reduction from the base price for the customer group 25%.

The problem with your configuration is that you are mixing 2 different types of discounts/prices: 1. Customer group price and 2. Catalog Rule Price for a customer group.

Since you set the Enable discount to subproducts = Yes it means the Catalog rule price discount will be used for simple products which are assigned to a configurable product.

But it's important to note that the discount is actually applied on the associated simple product price difference which is configured on the configurable product:

(image taken from this site: http://www.divisionlab.com/solvingmagento/magento-catalog-price-rules/)

So most probably the calculation for the simple product in your example goes like this:

0.28 * 0.75 = 0.21 --> this is the customer group price which was manually set in admin

0.21 * 0.75 = 0.16 (rounded 0.1575) --> applied discount from catalog rule price

So you just need to remove the catalog rule price rule to get the desired amount.

If I misunderstood you, please be a bit more detailed.