Tool · Free Google Sheets template, roughly 30 to 60 minutes to populate

SaaS Financial Model Template in Google Sheets

Drivetrain Free Beginner

A free, driver-based Google Sheets model where you plug in your own assumptions and actuals and watch the numbers flow through to a P&L, retention, and an LTV to CAC dashboard, no formula-building required. For your question, the point is to fork this, wire in your upfront cost per customer and your monthly repayment, and read the cash line month by month so you can see exactly when you dip and when you recover. It is deliberately beginner-friendly, so it is a starting point to make the cash gap concrete rather than a full FP&A system.

  • Driver-based, so you change a few assumptions (CAC, acquisition pace, churn) and the whole model and dashboard update.
  • Built to plug in your own numbers without touching formulas, which is what you want when you are stress-testing your own payback.
  • Treat it as a first model to see the shape of the cash curve, then add your own month-by-month cash row if the template does not surface it directly.
Open on drivetrain.ai ↗

The question it answers

  1. My business has a big upfront cost per customer that pays back over months. How do I model CAC payback period so I don't run out of cash?

Read with it

  1. This is the essay that separates the two payback numbers that actually matter to you: the accounting payback (when the revenue... Point Nine (Point Nine Land) Essay · About a 15 minute read The Art and Science of Figuring out Your CAC Payback Time Christoph Janz
  2. This piece nails the exact trap in your question: you can have great unit economics, a customer worth 5 times what it cost to... RoadmapOne Article · About a 10 minute read CAC Payback Period: The Cash Flow Metric That Gates Your Growth Speed Mark Holt
eChai Partner Brands The partnership →