# Prices

The price engine is responsible for calculating prices for products in the [product catalog](https://doc.ibexa.co/en/latest/product_catalog/product_catalog/index.md).

## Custom pricing

You can set up basic price rules depending on [customer groups](https://doc.ibexa.co/en/latest/users/customer_groups/index.md), or use [Discounts](https://doc.ibexa.co/en/latest/discounts/discounts/index.md) for more control over the price reduction.

Use the first option for basic use cases, for example to globally manage custom prices for your resellers. Each customer group can have a default price discount that applies to all products.

With the Discounts feature, you can create time-limited offers that apply only to specified regions, currencies, products, customers, and more.

### Assign prices dynamically

You could create a customer group resolver that provides custom price logic, for example, by retrieving user address from the customer profile, and assigning a customer group to the customer based on the address.

Such resolver must implement the [`Ibexa\Contracts\ProductCatalog\CustomerGroupResolverInterface`](https://doc.ibexa.co/en/latest/api/php_api/php_api_reference/classes/Ibexa-Contracts-ProductCatalog-CustomerGroupResolverInterface.html) interface.

You must then register it as a service with the `ibexa.product_catalog.customer_group.resolver` tag.

## Currency

Ibexa DXP ships with a list of available currencies, and you can also add custom currencies. To use currencies in your shop, you need to first enable them in the back office.

## VAT

You can [configure VAT rate globally](https://doc.ibexa.co/en/latest/product_catalog/product_catalog_configuration/#vat-rates) (per SiteAccess), or set it individually for each product type and product.