---
name: Break-Even CAC Calculator
category: FINANCE
format: CAC FLOOR
url: https://probiex.gumroad.com/l/break-even-cac-calculator
audience: SaaS founders and indie hackers spending anything to acquire customers.
updated: 2026-10-22
---

An XLSX workbook that derives your break-even CAC from real pricing, margins, and retention: the ceiling you must never bid above when acquiring customers.

Full details and current price: https://probiex.gumroad.com/l/break-even-cac-calculator

**What do I get, and in what format?** The XLSX calculator plus a PDF walkthrough of the math and the forced decisions.

**How long does setup take?** Plug in six numbers; the rest computes itself.