Possible/Worth-it merging different AWS accounts into one AWS Organisation

Question

**Current situation:** We have multiple AWS accounts, one per customer to make use of the free tier.

**Question:** Would it be **possible** in the future to merge these different AWS accounts into one AWS Organisation? being each AWS account an Organizational Unit.

The main reason to keep them separate at the beginning would be to make use of different free tiers. 
Reasons to put them later together into one AWS Organisation are Consolidated Billing (once the resources in each account are bigger) and easier management.

Also interested in hearing reasons to put them (or not) all in one account

Matt Barbieri · Accepted Answer

Hi There

Yes you can take advantage of AWS Organizations and consolidated billing by creating a new organization and inviting the accounts as members.  You can create OU's to apply similar Controls and Policies to groups of accounts.

I would suggest getting started by creating a new account that will be used as your new Management account, and [deploy Control Tower.](https://docs.aws.amazon.com/controltower/latest/userguide/getting-started-with-control-tower.html).  You can then invite each account to the Organization and enroll into Control Tower.

Please check out the [Multi Account Strategy Whitepaper](
https://docs.aws.amazon.com/whitepapers/latest/organizing-your-aws-environment/benefits-of-using-multiple-aws-accounts.html) for benefits of using Organizations and multiple accounts.  
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Possible/Worth-it merging different AWS accounts into one AWS Organisation

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