Terraform Cloud Cost Controls: Budgets, Policies, and Tagging

Infrastructure as code should include cost awareness. Use Terraform to enforce tags, estimate cost, and align with budgets.

1. Cost Estimation in CI

# Infracost or Terraform Cloud cost estimation in pipeline
plan:
  - terraform plan -out=tfplan
  - infracost breakdown --path=tfplan
  - # fail or warn if delta exceeds threshold

Catch expensive changes before apply.

2. Tagging Strategy

• Add cost allocation tags to every resource (team, project, environment).
• Use Terraform variables or workspace to set tags consistently.

tags = {
  Team     = var.team
  Project  = var.project
  Env      = var.environment
  ManagedBy = "terraform"
}

3. Policy as Code

• Use Sentinel (TFC) or OPA to enforce: “No instance type larger than X,” “All resources must have cost tags.”
• Gate applies on policy pass.

Best practice: treat cost as part of the PR review and make tag compliance automatic.