What is Customer Lifetime Value (LTV) in SaaS?

Customer Lifetime Value — LTV or CLV — is the total revenue a single customer generates from the moment they sign up until they cancel. It is the ceiling on how much you can profitably spend to acquire a customer, and one of the two pillars of SaaS unit economics alongside CAC.

LTV Definition

Customer Lifetime Value (LTV) is the total revenue your SaaS business expects to earn from a single customer over their entire subscription period. It combines average monthly revenue per customer with how long they typically stay — making it a direct function of both pricing and retention.

LTV Formula

LTV = ARPU × Average Customer Lifespan (months)

Where Average Customer Lifespan = 1 ÷ Monthly Churn Rate.

Example: ARPU of $60/month and a monthly churn rate of 4% gives a lifespan of 25 months. LTV = $60 × 25 = $1,500.

Use our LTV Calculator to calculate yours. Pair it with the LTV:CAC Ratio Calculator to check your unit economics.

Gross LTV vs Net LTV

Gross LTV uses raw revenue. Net (or margin-adjusted) LTV multiplies by gross margin to reflect actual profit: Net LTV = ARPU × Lifespan × Gross Margin %. For investor reporting and unit economics analysis, always use gross margin-adjusted LTV. For quick internal calculations, gross LTV is fine.

LTV Benchmarks

LTV benchmarks vary by segment and price point. What matters most is the LTV:CAC relationship. The 3:1 LTV:CAC ratio is the standard SaaS benchmark — meaning LTV should be at least 3× your CAC. See the full analysis in LTV vs CAC and use the LTV:CAC Ratio Calculator.

How to Increase LTV

LTV improves through three levers: increasing ARPU (through pricing strategy, upsells, and plan upgrades), reducing churn (extending average lifespan), and improving gross margins. Upsells are the most overlooked LTV lever — a 10% increase in ARPU through expansion revenue adds 10% to LTV with zero additional acquisition cost. Read What is Expansion Revenue and What is NRR.

LTV and the Metrics Ecosystem

LTV is built from ARPU and Churn Rate. It is compared against CAC to produce the LTV:CAC ratio. Together, these three metrics — LTV, CAC, and their ratio — form the unit economics foundation of every healthy SaaS business. See the complete framework in the SaaS Metrics Guide.

Frequently Asked Questions

How do I estimate LTV for a new SaaS business with no historical data? Use industry benchmarks for churn rate by segment (SMB, mid-market, enterprise) to estimate lifespan. As you accumulate 3–6 months of real data, replace the estimate with your actual observed churn rate.

Should LTV be calculated per customer or per customer segment? Both. Blended LTV gives a company-level view. Segment-level LTV (by plan, industry, or company size) reveals which customer types are most valuable — critical for targeting acquisition efforts where CAC is worthwhile.

Is LTV the same as CLV? Yes — LTV (Lifetime Value) and CLV (Customer Lifetime Value) refer to the same metric. Some companies also use CLTV. The term LTV is more common in SaaS contexts.