How do you calculate the LTV to CAC ratio for SaaS companies?

Answer

Divide Customer Lifetime Value (LTV) by Customer Acquisition Cost (CAC). A healthy SaaS LTV:CAC ratio should be at least 3:1.

The LTV to CAC ratio is a fundamental SaaS metric that measures the relationship between what you spend to acquire customers and the revenue they generate over their lifetime.

Calculation Formula

LTV:CAC Ratio = Customer Lifetime Value ÷ Customer Acquisition Cost

Step 1: Calculate LTV

LTV = (Average Revenue Per User × Gross Margin %) ÷ Monthly Churn Rate

Example: ($100 ARPU × 80% margin) ÷ 5% churn = $1,600 LTV

Step 2: Calculate CAC

CAC = Total Sales & Marketing Costs ÷ Number of New Customers Acquired

Example: $50,000 spent ÷ 100 new customers = $500 CAC

Step 3: Calculate Ratio

LTV:CAC = $1,600 ÷ $500 = 3.2:1

Healthy Benchmarks

3:1 minimum: Industry standard for sustainable growth
4:1 to 5:1: Optimal range for most SaaS companies
Above 6:1: May indicate under-investment in growth
Below 3:1: Suggests unsustainable unit economics

As Niels Tailleur from Data & AI Consultancy emphasizes, this ratio helps determine if your customer acquisition strategy is profitable and sustainable. Companies with poor ratios should focus on either reducing CAC through more efficient marketing or increasing LTV through better retention and upselling.

For personalized guidance, consult a SaaS Strategy specialist on TinRate.

Experts who can help

The following SaaS Strategy experts on Tinrate Wiki can help with this topic:

Expert	Role	Company	Country	Rate
Dirk Gypen	CEO	OpenVME & Mymmo	Belgium	EUR 250/hr
Jeroen De Wit		Teamleader	Belgium	EUR 200/hr
Niels Tailleur	CCO	Data & AI Consultancy	Netherlands	EUR 125/hr

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