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Customer Lifetime Value (CLV)

Calculate Customer Lifetime Value, LTV:CAC ratios, and acquisition payback periods for SaaS & E-Commerce.

Disclaimer: All calculations and figures are provided for informational purposes only and without warranty. This does not constitute legal, tax, or financial advice. Liability for any decisions made based on this calculator is disclaimed.
Scenarios:

2. Revenue, Margins & Acquisition Cost

$/mo.
%
$/cust.
%
💡 Lifespan: 28.6 months expected customer lifespan.
Net Customer Lifetime Value (LTV)
$2,746.00

Margin-adjusted customer value before CAC (Gross cumulative spend: $3,432.00).

LTV : CAC Ratio:3.4x (🟢 Ideal (3–5x))
CAC Payback Period:8.3 months
Net Profit / Cust:+$1,946.00
Customer Lifespan28.6 mo.2.4 years active
Acquisition Cost$800.00per acquired customer
Gross Customer Spend$3,432.0080 % margin
CAC Payback8.3 mo.break-even time

SaaS Unit Economics: Why Customer Lifetime Value Drives Enterprise Valuation

In competitive markets, the business that can sustainably extract the highest margin-adjusted Lifetime Value (LTV) wins by outbidding competitors on customer acquisition.

1. Foundational Unit Economics Equations

  • Implied Customer Lifespan: 1 / Monthly Churn Rate
  • Margin-Adjusted Net LTV: (Monthly ARPU × Gross Margin) / Monthly Churn Rate
  • LTV:CAC Ratio: Net LTV / Customer Acquisition Cost (CAC)
  • CAC Payback Duration: CAC / (Monthly ARPU × Gross Margin)

2. Three Strategic Levers to Expand LTV

Founders expand customer value through three vectors: reducing customer churn via onboarding excellence, capturing expansion revenue (seat upgrades & usage pricing), and improving software gross margins.

Frequently Asked Questions (FAQ)

What is Customer Lifetime Value (CLV/LTV) and how is it calculated?▼

Customer Lifetime Value represents the total margin-adjusted gross profit a company expects to generate from a single customer relationship. For subscription businesses, the formula is: Net LTV = (Monthly ARPU × Gross Margin %) / Monthly Churn Rate.

What is an ideal LTV:CAC ratio for scaling startups?▼

A 3:1 ratio (LTV = 3x CAC) is widely regarded as the golden standard for healthy growth. Ratios below 1.5:1 indicate unsustainable acquisition economics, while ratios exceeding 5:1 often signal underinvestment in marketing and missed growth opportunities.

What is the CAC Payback Period?▼

The CAC Payback Period measures how many months it takes for a newly acquired customer to generate enough gross profit to fully pay back the sales and marketing expenses required to acquire them. Benchmark targets range between 6 and 12 months.

Why must LTV calculations always be margin-adjusted?▼

Using top-line gross revenue in LTV models produces inflated metrics by ignoring direct hosting, payment gateway, third-party API, and support costs. Only gross margin-adjusted net LTV reflects true business equity value.

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