Most engineering teams audit their production infrastructure . Fewer audit the infrastructure that builds and deploys it. GitHub Actions runner minutes, ECR image layers, artifact archives, and ephemeral test clusters sit in a different budget category from application workloads. They rarely get the same scrutiny. That is where the leak starts. This is not about what your pipelines deploy. It is about what the pipelines themselves cost. The Pipeline Tax You Never Budgeted For CI/CD infrastructure cost has four components that most teams treat as fixed overhead: runner compute, image storage, artifact storage, and ephemeral test environments. Each one looks small per job. At scale, they combine into thousands per month. The mechanism is velocity multiplication. A team pushing 50 commits per day, each triggering a 10-step pipeline, generates 500 job executions daily. Each job touches runner compute, writes to artifact storage, and often pulls a fresh image.…