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SaaS Unit Economics Tool

LTV:CAC Ratio Calculator

Discover if your sales and marketing model is sustainable or burning cash. The single most important SaaS metric.

5,000

Marketing + Sales Spend ÷ New Customers.

1,000

Average recurring revenue paid by a single user per month.

85%

Revenue minus direct cost of goods/services (Hosting, Support).

24 Months

How many months the average user stays subscribed (or 1 ÷ Monthly Churn).

Lifetime Value (LTV)
₹20,400
Gross profit per user over 24 months
LTV:CAC Ratio
4.1:1
Excellent Economics
Payback Period
5.9 Months
Time to recover acquisition cost

Mastering Unit Economics

Your guide to SaaS metrics. Understand LTV, CAC, and what VCs look for.

What is LTV:CAC?

The LTV:CAC ratio measures the relationship between the Lifetime Value of a Customer (LTV) and the Customer Acquisition Cost (CAC). It is the fundamental metric that tells you how efficiently your sales and marketing engine generates value. Are you spending ₹10k to acquire a customer that only yields ₹5k in lifetime profit? This ratio exposes that instantly.

The 3:1 "Gold Standard"

Venture Capitalists broadly agree on benchmarks for SaaS businesses:

  • < 1:1 → You are losing money on every acquired customer.
  • 1:1 to 2:1 → You are breaking even, but growth is very expensive.
  • 3:1 → The optimal benchmark. You are efficiently converting marketing spend into profit.
  • > 5:1 → You are under-investing in marketing. You should spend more to capture market share.

How to Improve LTV:CAC

You can manipulate three core levers: Increase ARPU by cross-selling or raising prices, Decrease Churn (which increases lifespan) by improving customer success, or Decrease CAC by optimizing organic SEO or improving sales conversion rates.

Track Unit Economics Dynamically

Tired of updating spreadsheets? Connect your Stripe and accounting software to FinModel. We automatically parse your data, forecast cohort retention, and calculate LTV/CAC in real-time.

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