LTV (Customer Lifetime Value)

Customer Lifetime Value (LTV) is the total revenue a company expects to earn from a single customer over the entire relationship.

How to Calculate LTV

Formula:

LTV = ARPA × Gross Margin % × Customer Lifetime

Where:

• ARPA (Average Revenue Per Account) is typically measured per month or per year.
• Customer Lifetime = 1 / Churn Rate (use monthly churn for monthly LTV, annual churn for annual LTV).

Example:

• ARPA = $2,000/month
• Gross Margin = 80% (0.80)
• Monthly Churn = 2% (0.02)

Customer Lifetime = 1 / 0.02 = 50 months

LTV = $2,000 × 0.80 × 50 = $80,000

Why LTV Matters

LTV is critical because it defines how much you can profitably spend to acquire a customer.

It is one half of the key SaaS equation: LTV : CAC.

• If LTV = $80K and CAC = $20K, then LTV:CAC = 4:1.
• This means each dollar spent on acquisition returns four dollars in lifetime gross profit.

A higher LTV allows:

• Higher CAC (more marketing and sales investment)
• More aggressive growth
• Longer acceptable payback periods

Levers That Increase LTV

• Reduce churn: Extends customer lifetime, directly increasing LTV.
• Increase ARPA: Through upsells, cross-sells, and seat/usage expansion.
• Improve gross margin: Lowers cost of delivery so more revenue becomes profit.
• Deepen engagement: Better adoption and product stickiness usually improve retention.

Common Pitfalls

• Using overly optimistic churn or expansion assumptions instead of real data.
• Relying on projections rather than observed historical churn and margins.

LTV should be:

• Grounded in actual churn behavior