> ## Documentation Index
> Fetch the complete documentation index at: https://www.plain.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Add companies and tenants to tiers

<Snippet file="graphql/sdk-note.mdx" />

You can add multiple tenants and companies to a tier in a single mutation.

Companies and tenants can only be in a single tier.

For this mutation you need the following permissions:

* `tierMembership:read`
* `tierMembership:create`

<Snippet file="graphql/add-members-to-tier.mdx" />