# Price lists

Price lists determine the SKU [prices](https://docs.commercelayer.io/core-api-reference/prices) and their currency within a [market](https://docs.commercelayer.io/core-api-reference/markets). By default, taxes are included in the prices associated with a price list. If you want to override this setup, set the `tax_included` attribute to `false`.

A price list can be associated with different [price list schedulers](https://docs.commercelayer.io/core-api-reference/price_list_schedulers). When one of those price list schedulers is associated with a market, its price list temporarily overrides the market's original one, letting you change a subset of prices within a specific time window (e.g. seasonal sales).

You can define a custom alphanumeric (case-sensitive) `code` for your price lists, provided that it's unique across the environment (it can contain underscore and hyphens, spaces are not allowed, the maximum length is **25** characters).

## Price rules

By filling up the `rules` object of a price list, you can set up a price rule thanks to our [Rules Engine integration](https://app.gitbook.com/s/hiqD9AvrD8A8IPj7QXPv/core-api-integration/price-rules) with Commerce Layer Core API. Adding one or more price rules to a price list will result in applying the discounts due to the rule actions to all the price list's prices that satisfy the related rule conditions.

<details>

<summary>How-to</summary>

Please refer to the [Rules Engine documentation](https://app.gitbook.com/o/-Lfu_B3DKew-kvoEWzTk/s/hiqD9AvrD8A8IPj7QXPv/) to learn more about how to set up promotional [rules](https://app.gitbook.com/s/hiqD9AvrD8A8IPj7QXPv/rules), define [conditions](https://app.gitbook.com/s/hiqD9AvrD8A8IPj7QXPv/conditions) and [actions](https://app.gitbook.com/s/hiqD9AvrD8A8IPj7QXPv/actions), browse the most common [use cases](https://app.gitbook.com/s/hiqD9AvrD8A8IPj7QXPv/use-cases/price-lists), and more.

</details>

{% hint style="danger" %}
Price rules, together with the Rules Engine integration, are still in **beta** and available only to our enterprise customers. If you're one of them and want to test and leverage its functionalities reach out to us and request to be part of the beta program.
{% endhint %}

<details>

<summary>Data model</summary>

Check the related [ER diagram](https://commercelayer.io/docs/data-model/price-lists-and-currencies) and explore the flowchart that illustrates how the price list resource relates to the other API entities.

</details>