--- title: "Build a Startup CAC Attribution Model with PostgreSQL" published: true description: "A step-by-step guide to separating blended CAC from paid CAC using server-side attribution, UTM discipline, and cohort SQL queries — no enterprise tooling required." tags: postgresql, architecture, api, performance canonical_url: https://blog.mvpfactory.co/how-to-calculate-true-startup-cac-with-organi