# Quotas and restrictions
<a name="billing-limits"></a>

You can use the following tables to find the current quotas, restrictions, and naming constraints within the AWS Billing and Cost Management console.

**Notes**  
To learn more about quotas and restrictions for AWS Cost Management, see [Quotas and restrictions](https://docs.aws.amazon.com/cost-management/latest/userguide/management-limits.html) in the *AWS Cost Management User Guide*.
For more information about other AWS service quotas, see [AWS service quotas](https://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html) in the *AWS General Reference*.

**Topics**
+ [Cost categories](#limits-categories)
+ [Purchase orders](#limits-po)
+ [Advance Pay](#limits-ap)
+ [Cost allocation tags](#limits-cat)
+ [AWS Price List](#price-list-api-quotas)
+ [Bulk policy migrator](#limits-bulk)
+ [Payment methods](#limits-payments)
+ [AWS invoice configuration](#limits-invoicing)

## Cost categories
<a name="limits-categories"></a>

See the following quotas and restrictions for cost categories.


| Description | Quotas and restrictions | 
| --- | --- | 
| The total number of cost categories for a management account. | 50 | 
| The number of cost category rules for a cost category (API). | 500 | 
| The number of cost category rules for a cost category (UI). | 100 | 
|  Cost category names. |  [See the AWS documentation website for more details](http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/billing-limits.html)  | 
| Cost category value names. | Names don't have to be unique | 
| The type and number of characters allowed in a cost category name and value name. |  [See the AWS documentation website for more details](http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/billing-limits.html)  | 
| The number of split charge rules for a cost category. | 10 | 

## Purchase orders
<a name="limits-po"></a>

See the following quotas and restrictions for purchase orders.


| Description | Quotas and restrictions | 
| --- | --- | 
| The type of characters that you can use in a purchase order ID. |  [See the AWS documentation website for more details](http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/billing-limits.html)  | 
| The number of characters allowed in a purchase order ID. | 100 | 
| The number of contacts allowed for a purchase order. | 20 | 
| The number of tags allowed for a purchase order. | 50 | 
| The number of line items allowed for a purchase order. | 100 | 

## Advance Pay
<a name="limits-ap"></a>

See the following quotas and restrictions for Advance Pay.


| Description | Quotas and restrictions | 
| --- | --- | 
| User entity  | AWS Inc. or AWS Europe | 
| Currency | USD | 
| Fund usage after funds are added to your Advance Pay. |  [See the AWS documentation website for more details](http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/billing-limits.html)  | 
| If there are unused funds in your Advance Pay. |  [See the AWS documentation website for more details](http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/billing-limits.html)  | 

## Cost allocation tags
<a name="limits-cat"></a>

You can adjust the maximum number of active cost allocation tag keys from Service Quotas. For more information, see [Requesting a quota increase](https://docs.aws.amazon.com/servicequotas/latest/userguide/request-quota-increase.html) in the *Service Quotas User Guide*.

**Note**  
Tags that are automatically activated don’t count towards your cost allocation tag quota, such as the `awsApplication` tag. 

See the following quotas and restrictions for cost allocation tags.


| Description | Quotas and restrictions | 
| --- | --- | 
| The maximum number of active cost allocation tag keys for each payer account. | 500 | 
| The number of cost allocation tags that can be activated or deactivated for one request, by using the API or the console. | 20 | 

## AWS Price List
<a name="price-list-api-quotas"></a>

Some Price List Query API and Price List Bulk API operations are throttled by using a token bucket scheme to maintain service availability. These quotas are per AWS account on a per Region basis. The following table shows the quotas for each API operation.


**Price List Query API**  

| API operation | Token bucket size | Refill rate per second | 
| --- | --- | --- | 
| DescribeServices | 10 | 5 | 
| GetAttributeValues | 10 | 5 | 
| GetProducts | 10 | 5 | 


**Price List Bulk API**  

| API operation | Token bucket size | Refill rate per second | 
| --- | --- | --- | 
| DescribeServices | 10 | 5 | 
| GetPriceListFileUrl | 10 | 5 | 
| ListPriceLists | 10 | 5 | 

## Bulk policy migrator
<a name="limits-bulk"></a>

See the following quotas and restrictions for bulk policy migrator.


| Description | Quotas and restrictions | 
| --- | --- | 
| The maximum number of affected accounts in an organization that you can migrate. | 200 | 
| The maximum number of affected policies in an organization that you can migrate. | 1,000 | 

## Payment methods
<a name="limits-payments"></a>

See the following quotas and restrictions for payments.


| Description | Quotas and restrictions | 
| --- | --- | 
| Tagging payment instruments. | This feature supports the following payment methods:[See the AWS documentation website for more details](http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/billing-limits.html)<br />This feature doesn't support the following payment methods:[See the AWS documentation website for more details](http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/billing-limits.html) | 

## AWS invoice configuration
<a name="limits-invoicing"></a>

See the following quotas and restrictions for Invoice configuration.


| Description | Quotas and restrictions | 
| --- | --- | 
| The number of invoice units for a payer account. | 500 | 
| The type of characters allowed in an invoice unit name. | [See the AWS documentation website for more details](http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/billing-limits.html) |