Teams allow custom role assignment: https://github.com/integrations/terraform-provider-github/pull/1038 (see also https://github.com/integrations/terraform-provider-github/issues/988) Users (Collaborators) do not: https://github.com/integrations/terraform-provider-github/blob/05a8875f0a3912d7231b06cfe5dc5d55bbc1dccc/github/resource_github_repository_collaborator.go#L42 Thanks