AWS Organizations
User Guide

Limits of AWS Organizations

This section specifies limits that affect AWS Organizations.

Limits on Names

The following are restrictions on names that you create in AWS Organizations, including names of accounts, organizational units (OUs), roots, and policies:

  • They must be composed of Unicode characters

  • They must not exceed 250 characters in length

Maximum and Minimum Values

The following are the default maximums for entities in AWS Organizations:

Number of AWS accounts in an organization

Varies. If you need to increase your limit, you can contact AWS Support. In the upper-right corner of the console, choose Support, Support Center, and then choose Create case.

An invitation sent to an account counts against this limit. The count is returned if the invited account declines, the master account cancels the invitation, or the invitation expires.

Number of roots in an organization


Number of OUs in an organization


Number of policies in an organization


Maximum size of a service control policy (SCP) document

5,120 bytes. This includes all characters, including white space. You can remove all white space characters (such as spaces and line breaks) that are outside quotation marks to reduce the size of your SCP if you approach the limit.

OU maximum nesting in a root

5 levels of OUs deep under a root

Invitations sent in a 24 hour period


Number of member accounts you can create concurrently

5 — As soon as one finishes, you can start another, but only five can be in progress at a time.

Number of entities to which you can attach a policy


Expiration times for handshakes

The following are the timeouts for handshakes in AWS Organizations:

Invitation to join an organization

15 days

Request to enable all features in an organization

90 days

Handshake is deleted and no longer appears in lists

30 days after the handshake is completed

Number of policies that can be attached to an entity

The maximum depends on the policy type as well as the entity that you're attaching the policy to. The following table shows each policy type and the number of entities to which each can be attached:

Policy type Policies per root Policies per OU Policies per account
Service control policy 5 5 5


Currently, you can have only one root in an organization.

The minimum depends on the policy type. The following table shows each policy type and the minimum number of entities to which each can be attached:

Policy type Minimum allowed attached to an entity
Service control policy 1 — Every entity must have at least one SCP attached at all times. You can't remove the last SCP from an entity.