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Finance Playbook

Blended CAC and Contribution Margin Playbook 2026

A financial discipline framework for measuring fully loaded CAC, contribution margin, payback period, LTV:CAC, and capital allocation across channels.

Preview: what this playbook helps you fix

This playbook is written for ecommerce operators who need a practical operating model, not a generic checklist. It starts with the commercial problem, then moves into the systems, metrics, and operating cadence required to make better growth decisions.

Core operating questions

  • Where is the current growth system losing signal, margin, or execution speed?
  • Which metrics should guide daily execution versus executive decision-making?
  • What should be handled by channel specialists, and what needs senior operator ownership?
  • How should the team connect this work to contribution margin, inventory, creative, search visibility, and lifecycle growth?

Expected outcomes

  • Calculate true blended CAC
  • Report contribution margin by channel
  • Make growth decisions from unit economics

How Eva applies the framework

Eva turns the playbook into an operating cadence: audit the current setup, identify the highest-value constraints, define the first 30 days of execution, and connect the work to the brand's broader marketplace and financial goals.

The full playbook includes the detailed framework, operating checklists, templates, examples, and next-step implementation path.