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User Guide

First time using the AWS CLI? See the User Guide for help getting started.

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[ aws . iam ]



Adds one or more tags to an IAM user. If a tag with the same key name already exists, then that tag is overwritten with the new value.

A tag consists of a key name and an associated value. By assigning tags to your resources, you can do the following:

  • Administrative grouping and discovery - Attach tags to resources to aid in organization and search. For example, you could search for all resources with the key name Project and the value MyImportantProject . Or search for all resources with the key name Cost Center and the value 41200 .
  • Access control - Reference tags in IAM user-based and resource-based policies. You can use tags to restrict access to only an IAM requesting user or to a role that has a specified tag attached. You can also restrict access to only those resources that have a certain tag attached. For examples of policies that show how to use tags to control access, see Control Access Using IAM Tags in the IAM User Guide .
  • Cost allocation - Use tags to help track which individuals and teams are using which AWS resources.


  • Make sure that you have no invalid tags and that you do not exceed the allowed number of tags per role. In either case, the entire request fails and no tags are added to the role.
  • AWS always interprets the tag Value as a single string. If you need to store an array, you can store comma-separated values in the string. However, you must interpret the value in your code.

For more information about tagging, see Tagging IAM Identities in the IAM User Guide .

See also: AWS API Documentation

See 'aws help' for descriptions of global parameters.


--user-name <value>
--tags <value>
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]


--user-name (string)

The name of the user that you want to add tags to.

This parameter accepts (through its regex pattern ) a string of characters that consist of upper and lowercase alphanumeric characters with no spaces. You can also include any of the following characters: =,.@-

--tags (list)

The list of tags that you want to attach to the user. Each tag consists of a key name and an associated value.

Shorthand Syntax:

Key=string,Value=string ...

JSON Syntax:

    "Key": "string",
    "Value": "string"

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See 'aws help' for descriptions of global parameters.


To add a tag to a user

The following tag-user command adds a tag with the associated Department to the specified user. This command produces no output.

aws iam tag-user --user-name alice --tags '{"Key": "Department", "Value": "Accounting"}'

For more information, see Tagging IAM Entities in the AWS IAM User Guide