What is LTV (Customer Lifetime Value)?
Definition
Customer Lifetime Value (LTV, CLV, or CLTV) is the total revenue a business can expect from a single customer account throughout their entire relationship. In SaaS, LTV is calculated by multiplying the average revenue per user (ARPU) by the average customer lifespan. It is one of the most important metrics for SaaS because it determines how much you can afford to spend acquiring customers (CAC) while remaining profitable.
Detailed Explanation
LTV captures the full economic value of a customer relationship, not just a single month's payment. A customer paying $100/month who stays for 36 months generates $3,600 in lifetime value — far more than their single monthly payment suggests. This long-term perspective is fundamental to how SaaS businesses invest in acquisition, retention, and recovery.
The basic LTV formula is: LTV = ARPU x (1 / Churn Rate). For a customer paying $100/month with 2% monthly churn, LTV = $100 x (1/0.02) = $5,000. More sophisticated calculations factor in gross margin (LTV = ARPU x Gross Margin % x (1/Churn Rate)), expansion revenue, and discount rates for the time value of money.
LTV is deeply connected to churn: even small changes in churn rate have dramatic effects on LTV due to the reciprocal relationship. Reducing monthly churn from 5% to 3% increases LTV by 67% (from 20 months to 33 months average lifetime). This is why churn reduction — including preventing involuntary churn from payment failures — has such outsized impact on business value.
Why It Matters
LTV determines the economics of your entire business model. The LTV:CAC ratio (lifetime value to customer acquisition cost) is the golden metric — a ratio of 3:1 or higher is considered healthy for SaaS. If your LTV is $3,000, you can afford to spend up to $1,000 acquiring each customer. If churn erodes LTV to $1,500, your maximum sustainable CAC drops to $500, constraining growth. Every involuntary churn event (failed payment not recovered) directly reduces average LTV by cutting the customer's lifespan short. Recovering a $100/month customer who would have passively churned saves not just $100, but the full remaining lifetime value — potentially thousands of dollars.
How to Calculate
Simple LTV = ARPU x Average Customer Lifespan. Or equivalently: LTV = ARPU / Monthly Churn Rate. With gross margin: LTV = (ARPU x Gross Margin %) / Monthly Churn Rate. Example: ARPU = $200/month. Monthly churn = 2.5%. Gross margin = 80%. LTV = ($200 x 0.80) / 0.025 = $6,400.
Practical Example
A SaaS company has two segments: SMB ($50/month, 5% monthly churn, LTV = $1,000) and Enterprise ($500/month, 1% monthly churn, LTV = $50,000). Each recovered failed payment in the SMB segment saves $1,000 in LTV. Each recovered Enterprise payment saves $50,000 in LTV. This is why Rezoki prioritizes recovery outreach for high-LTV customers — an AI voice call that costs $2 to make could save $50,000 in lifetime value.
Industry Benchmarks
| Segment | Benchmark |
|---|---|
| Healthy LTV:CAC ratio | 3:1 or higher |
| SMB SaaS average LTV | $1,000-$5,000 |
| Mid-market SaaS average LTV | $10,000-$50,000 |
| Enterprise SaaS average LTV | $50,000-$500,000+ |
| Time to recover CAC | <12 months for healthy SaaS |
Related Terms
Churn Rate
Churn rate (also called customer churn rate or attrition rate) is the percentage of customers who ca...
MRR (Monthly Recurring Revenue)
Monthly Recurring Revenue (MRR) is the total predictable revenue a subscription business earns each ...
ARR (Annual Recurring Revenue)
Annual Recurring Revenue (ARR) is the annualized value of a company's recurring subscription revenue...
NRR (Net Revenue Retention)
Net Revenue Retention (NRR), also called Net Dollar Retention (NDR), measures the percentage of reve...
Revenue Recovery
Revenue recovery is the comprehensive process of recapturing revenue that would otherwise be lost du...
Involuntary Churn
Involuntary churn (also called passive churn or delinquent churn) occurs when a customer's subscript...