Service-linked roles for Budgets

Budgets uses AWS Identity and Access Management (IAM) service-linked roles. A service-linked role is a unique type of IAM role that is linked directly to Budgets. Service-linked roles are predefined by Budgets and include all the permissions that the service requires to call other AWS services on your behalf.

Budgets defines the permissions of its service-linked roles, and unless defined otherwise, only Budgets can assume its roles. The defined permissions include the trust policy and the permissions policy, and that permissions policy cannot be attached to any other IAM entity.

For information about other services that support service-linked roles, see AWS services that work with IAM and look for the services that have Yes in the Service-Linked Role column. Choose a Yes with a link to view the service-linked role documentation for that service.

Service-linked role permissions for Budgets

Budgets uses the service-linked role named AWSServiceRoleForBudgets, which enables Budgets to verify access to billing views that are shared across account boundaries.

The purpose of this service-linked role is to verify that customers have access to the underlying billing view data associated with a Budget when updating the spend of a Budget.

The AWSServiceRoleForBudgets service-linked role trusts the budgets.amazonaws.com service to assume the role.

The role permissions policy, BudgetsServiceRolePolicy, allows Budgets to complete the following action on all Billing View resources that the customer has access to:

For more information, see Allows Budgets to call services required to verify billing view access.

To view the full permissions details of the service-linked role BudgetsServiceRolePolicy, see BudgetsServiceRolePolicy in the AWS Managed Policy Reference Guide.

You must configure permissions to allow an IAM entity (such as a user, group, or role) to create, edit, or delete a service-linked role. For more information, see Service-linked role permissions in the IAM User Guide.

Creating the Budgets service-linked role

You don't need to manually create a service-linked role. When you make a request to CreateBudget or UpdateBudget with a BillingView from another account that you have access to, the service automatically creates the service-linked role for you.

If you delete this service-linked role, and then need to create it again, you can use the same process to recreate the role in your account.

Editing the Budgets service-linked role

You can't edit the name or permissions of the AWSServiceRoleForBudgets service-linked role because various entities might reference the role. However, you can edit the description of the role using IAM. For more information, see Editing a service-linked role in the IAM User Guide.

To allow an IAM entity to edit the description of the AWSServiceRoleForBudgets service-linked role

Add the following statement to the permissions policy for the IAM entity that needs to edit the description of a service-linked role.

{
    "Effect": "Allow",
    "Action": [
        "iam:UpdateRoleDescription"
    ],
    "Resource": "arn:aws:iam::*:role/aws-service-role/budgets.amazonaws.com/AWSServiceRoleForBudgets",
    "Condition": {"StringLike": {"iam:AWSServiceName": "budgets.amazonaws.com"}}
}

Deleting the Budgets service-linked role

If you no longer need to use Budgets, we recommend that you delete the AWSServiceRoleForBudgets service-linked role. That way, you don't have an unused entity that isn't actively monitored or maintained. However, before you can manually delete the service-linked role, you must delete any Budgets in your account that are associated with a Billing View from another account. If you try deleting the service-linked role before this is done, the request will fail.

To manually delete the service-linked role using IAM

Use the IAM console, the AWS Command Line Interface (AWS CLI), or the AWS API to delete the AWSServiceRoleForBudgets service-linked role. For more information, see Deleting a Service-Linked Role in the IAM User Guide.

Supported Regions for Budgets service-linked roles

Budgets supports using service-linked roles in all of the AWS Regions where the service is available. For more information, see AWS service endpoints.