What is LTV (Customer Lifetime Value)? (Definition + SaaS example)
Customer Lifetime Value (LTV) is the total revenue a SaaS company expects to earn from a single customer over the entire duration of their relationship. LTV combines average revenue per user, gross margin, and churn rate to quantify the long-term economic value of each customer.
Formula and Calculation
Customer Lifetime Value
LTV = (ARPU × Gross Margin %) ÷ Monthly Churn Rate
Alternative formulation using customer lifetime:
LTV via Lifetime
LTV = ARPU × Gross Margin % × Average Customer Lifetime (months)
Where average customer lifetime = 1 ÷ Monthly Churn Rate.
Worked SaaS Example
A mid-market SaaS company has the following unit economics:
| Input | Value |
|---|---|
| Average revenue per account (monthly) | $800 |
| Gross margin | 78% |
| Monthly churn rate | 2.0% |
| Average customer lifetime | 50 months (1 ÷ 0.02) |
LTV = ($800 × 0.78) ÷ 0.02 = $31,200
| Scenario | Monthly Churn | Lifetime | LTV |
|---|---|---|---|
| High churn | 5.0% | 20 months | $12,480 |
| Moderate churn | 3.0% | 33 months | $20,800 |
| Current | 2.0% | 50 months | $31,200 |
| Low churn | 1.0% | 100 months | $62,400 |
Halving the churn rate from 2% to 1% doubles LTV from $31,200 to $62,400 — the most powerful lever in SaaS unit economics.
LTV by Segment
| Segment | Typical ARPU | Typical Churn | Typical LTV |
|---|---|---|---|
| Self-serve SMB | $50–$200/mo | 4–8% monthly | $500–$4,000 |
| Mid-market | $500–$2,000/mo | 1.5–3% monthly | $12,000–$100,000 |
| Enterprise | $5,000–$50,000/mo | 0.5–1.5% monthly | $250,000–$5,000,000+ |
Why LTV Matters for SaaS
Finance teams use LTV to determine how much the company can afford to spend on acquiring and retaining each customer. Without a clear LTV figure, it is impossible to set rational budgets for sales, marketing, or customer success — every spending decision becomes a guess.
In investor reporting, LTV appears alongside CAC as part of the unit economics story. Investors want to see that each dollar spent on acquisition generates at least three dollars in lifetime gross profit. Increasing LTV over time — through upsells, churn reduction, or pricing optimization — is a strong growth signal.
A common mistake is calculating LTV using only current churn rates without considering how churn changes as the customer base matures. Early cohorts often churn faster as the company refines its ICP and onboarding. Using blended churn from a young customer base will understate LTV for the business as it scales.
LTV connects directly to CAC through the LTV:CAC ratio, and to churn rate as the denominator in the formula. Improving LTV is ultimately about increasing MRR per customer while extending the relationship — the intersection of product, pricing, and retention.
Calculate and track LTV in JustPaid
Frequently Asked Questions
LTV, CLTV (Customer Lifetime Value), and CLV (Customer Lifetime Value) all refer to the same metric. SaaS companies tend to use LTV as shorthand. The terms are fully interchangeable — context and company convention determine which abbreviation is used.
Related Terms
CAC (Customer Acquisition Cost)
Customer Acquisition Cost (CAC) is the total cost of acquiring a new customer, calculated by dividing total sales and marketing spend by the number of new customers acquired in a period. CAC is one of the most critical SaaS unit economics metrics, determining how efficiently a company converts spend into paying customers.
LTV:CAC Ratio
The LTV:CAC ratio compares Customer Lifetime Value to Customer Acquisition Cost, measuring how much long-term value each acquisition dollar generates. A ratio of 3:1 or higher is the standard SaaS benchmark — meaning every dollar spent on acquisition returns at least three dollars in gross profit over the customer's lifetime.
Churn Rate
Churn rate is the percentage of customers or revenue lost over a given period. In SaaS, churn rate is the inverse of retention — a 5% monthly customer churn means the company loses 5% of its customer base each month. Reducing churn is the single most effective lever for improving LTV, NRR, and long-term revenue growth.
MRR (Monthly Recurring Revenue)
Monthly Recurring Revenue (MRR) is the predictable revenue a SaaS company earns each month from active subscriptions. MRR normalizes different billing periods — annual, quarterly, and monthly — into one consistent monthly figure, making it the foundational metric for SaaS financial planning.
Customer Lifetime Revenue (CLR)
Customer Lifetime Revenue (CLR) is the total top-line revenue a SaaS company expects to earn from a customer across the full relationship. Unlike customer lifetime value, CLR does not subtract service costs or gross margin, so it measures revenue contribution rather than profit contribution.
