Customer Lifetime Value (LTV)

Customer Lifetime Value (LTV) is the total revenue a customer generates from their initial purchase through the end of their relationship with your company, accounting for recurring payments, expansions, and the gross margin on that revenue over time.

The simplified formula: Average ARR per customer x Gross margin x Average customer lifespan in years. A customer paying $100K/year at 75% gross margin with an average lifespan of 5 years has a LTV of $375K. That number should inform how much you spend to acquire them (CAC) and how much you invest in retaining them (CS cost to serve).

LTV is where the financial argument for CS investment becomes irrefutable. Reducing churn from 9% to 6% extends average customer lifespan from approximately 11 years to 17 years. On a $100K ARR account at 75% margin, that's the difference between $825K and $1.275M in lifetime value. Multiply that across a customer base of 500 accounts and the aggregate impact runs into hundreds of millions.

The problem with LTV in practice is that most companies calculate it once and treat it as a static number. LTV should be recalculated by segment, tracked quarterly, and used as an active input for resource allocation decisions. A segment where LTV is declining signals rising churn, compressing deal sizes, or weakening expansion. That trend should trigger investigation before it shows up in NRR as a lagging indicator.

LVT also informs revenue segmentation decisions. If mid-market accounts have higher LTV than enterprise accounts (higher margin, lower cost to serve, longer average lifespan despite lower ARR), that changes how you allocate CS resources. The goal isn't to serve the biggest logos, it's to protect and grow the most valuable ones.

Related terms: CAC Payback Period, CS Segmentation, The Churn Tax

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