Managing your purchase orders
You can use your Billing and Cost Management console to manage your purchase orders and configure how they reflect on your invoices. You have the option to add multiple purchase orders with multiple line items. Based on your configurations, we select the purchase order that best matches with your invoice. You can manage purchase orders if you're using a regular Amazon account or an Amazon Organizations management account. For more information about accessing the feature, see Overview of managing access permissions.
Each purchase order can have several line items, and every line item is used for matching with invoices. The following types of line items are available:
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ALL – All charges on your Amazon account.
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Amazon Monthly Usage – Your Amazon monthly invoice charges.
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Amazon Subscription Purchase – Your subscription invoice charges; for example, upfront charges for Reserved Instances (RI) and Amazon Web Services Support charges.
Many criteria and parameters are used to determine the optimal purchase order for your invoices. You can create up to 100 active purchase orders with up to 100 line items for each regular account or Amazon Organizations management account.
When an invoice is generated, all purchase orders that are added to your management account are considered for association. Then, expired or suspended purchase orders are filtered out, leaving only the active purchase orders. Your invoice’s billing entity is matched with the “Bill from” entity in your purchase order, filtering out those that don’t match. For example, you might have a purchase order added for the NWCD entity (PO_1), and another one for the Sinnet entity (PO-2). If you purchase a Reserved Instance in the Ningxia Region, only PO_1 will be considered for invoice association.
Next, we evaluate line item configurations to determine the best fit for your invoice. To be matched with a line item, the invoice's billing period must be within the line item's start and end month, and it must also match the line item type. If multiple line items match, we use the line item with the most specific type for invoice association. For example, if you have an RI invoice, we use the subscription line item instead of ALL if both are configured.
Lastly, the line items with enough balance to cover your invoice amount are selected above the out of balance line items. If line items that belong to multiple purchase orders match all criteria precisely, we use the purchase order that was most recently updated to match the invoice.