LTV (Lifetime Value)
What a customer is truly worth over time - margin, not revenue - and the number CAC has to earn against.
- Term
- LTV / CLV (Lifetime Value)
- Is
- Total gross PROFIT a customer delivers over time
- Driven by
- Margin × frequency × lifespan (retention)
- Read against
- CAC - the LTV:CAC ratio and payback
Forms & parts of speech
Definition in plain terms
LTV (Lifetime Value, also CLV/CLTV) is the total GROSS PROFIT a customer is expected to deliver over the entire course of their relationship with a business - not the revenue they generate, but the margin after the cost of serving them.
It's driven by three things: the gross MARGIN per purchase, how OFTEN they buy (frequency or recurring revenue), and how LONG they stay before churning (lifespan, the inverse of churn).
LTV is the number that CAC has to earn against: combined with CUSTOMER-ACQUISITION-COST, it produces the LTV:CAC ratio and payback period that decide whether acquiring a customer is an investment or a loss.
The mechanics
Margin, not revenue (the most common error): LTV must be built on gross PROFIT, not revenue - using revenue inflates the number, sometimes by multiples, and justifies a CAC the business can't actually afford (the mistake that funds unprofitable growth).
The honest LTV nets out the cost of goods and the cost to serve, leaving the margin a customer actually contributes. The three drivers: LTV rises with higher gross MARGIN per order, higher purchase FREQUENCY or recurring revenue (more value per period), and longer LIFESPAN
which is set by RETENTION and its inverse, churn (a small improvement in retention compounds enormously into LTV, because a retained customer keeps contributing margin period after period - the leaky-bucket logic that makes retention the highest-leverage LTV input).
The calculation ranges from simple (average margin per period ÷ churn rate) to sophisticated (cohort-based, discounted for the time value of money, predictive models) - and the right complexity depends on the decision, but the principles hold: margin not revenue, and retention as the driver.
What LTV is FOR (the pairing): LTV means little alone - its purpose is to be read against CAC.
The LTV:CAC ratio (a common health benchmark is roughly 3:1 or better, though it varies) and the CAC payback period (how many months of margin to recover the acquisition cost) are the reads that decide whether the unit economics work.
LTV also guides how much you can afford to spend to acquire (allowable CAC), which customers and segments are most valuable (high-LTV cohorts worth more acquisition and retention investment), and where retention investment pays back (since retention drives LTV).
The caveats: LTV is a forecast (especially for newer businesses with little lifespan data - early LTV estimates are uncertain and often optimistic), it should be segmented (blended LTV hides that some cohorts are far more valuable than others), and it's only as honest as its margin and churn inputs.
The framing: LTV is the total gross profit a customer delivers over their lifetime - margin not revenue, driven by margin, frequency, and retention - and the number CAC must earn against
the discipline is building LTV on real margin (never revenue), recognizing retention as its highest-leverage driver, segmenting it by cohort, treating it as the uncertain forecast it is, and using it - via the LTV:CAC ratio and payback
to judge whether acquisition is profitable and how much you can afford to spend.
When it matters
LTV matters as the other half of the unit-economics equation - the number CAC must earn against to determine whether acquiring a customer is an investment or a loss.
It matters in every decision about how much you can afford to spend to acquire (allowable CAC), which segments deserve more acquisition and retention investment (high-LTV cohorts), and where retention work pays back (since retention is LTV's highest-leverage driver).
It matters most when built honestly - on gross margin not revenue (the common, dangerous inflation), segmented by cohort (not blended), and treated as the uncertain forecast it is (especially for newer businesses).
The discipline is computing LTV on real margin, recognizing retention/churn as the driver that compounds it, segmenting it, and using it only in relation to CAC (the LTV:CAC ratio and payback period) - because LTV's entire purpose is to judge whether the cost of acquisition was worth paying.
The reported LTV summed the revenue a customer generated over their lifetime, ignoring the cost of goods and the cost to serve - which roughly doubled the figure and justified a CAC the business couldn't actually afford.
Rebuilt honestly on gross PROFIT (netting out the costs of serving the customer), the real LTV was far lower, and the LTV:CAC ratio that had looked comfortably healthy was actually underwater - the business had been funding unprofitable growth on an inflated number.
The team fixes the calculation and the discipline around it.
It builds LTV on margin not revenue, segments it by cohort (revealing that some cohorts were far more valuable than the blended average suggested, and others were value-destroying), and treats the figure as the uncertain forecast it is rather than a precise truth.
Crucially, it recognizes that retention is LTV's highest-leverage driver - a small improvement in retention compounds enormously, because a retained customer keeps contributing margin period after period - so it redirects investment toward keeping customers, not just acquiring them.
And it stops reading LTV in isolation: the number's entire purpose is to be read against CAC, via the LTV:CAC ratio and the payback period, which together decide whether each acquired customer is an investment or a loss.
With an honest, margin-based, segmented LTV read against CAC, the business sets an allowable CAC it can actually afford and reallocates toward the high-LTV cohorts and the retention that compounds value - rather than scaling spend against a revenue-inflated number that was quietly destroying margin.
treating an early LTV forecast as precise truth (especially for newer businesses with little lifespan data); ignoring retention as the compounding driver; and reading LTV in isolation rather than against CAC, payback, and margin.
Formula
Benchmarks
LTV is a forecast; build it on gross margin, segment by cohort, and read it only against CAC.
Ranges are illustrative; every published figure is cited from a named public source or labelled “RGM analysis.”
Synonyms & antonyms
Synonyms
Antonyms
Origin & history
Lifetime Value became central to modern growth economics with subscription and DTC models, where whether a customer's lifetime profit exceeds the cost to acquire them (CAC) determines viability; honest practice builds LTV on gross margin rather than revenue, treats retention as its compounding driver, segments it by cohort, and reads it always against CAC via the LTV:CAC ratio and payback period.
Etymology: source.
Usage trends
Search interest for this term over the last five years:
Common questions
- What is LTV?
- Lifetime Value — the total gross profit (not revenue) a customer is expected to deliver across their relationship with a business, driven by margin, purchase frequency, and how long they stay before churning.
- Why must LTV be based on margin, not revenue?
- Because revenue-based LTV inflates the number — often by multiples — and justifies a CAC the business can't actually afford; honest LTV nets out the cost of goods and the cost to serve.
- What drives LTV the most?
- Retention — a small improvement in how long customers stay compounds enormously into LTV, because a retained customer keeps contributing margin period after period.
Related tools & calculators
Resources & people to follow
- referenceWikipedia — customer lifetime value
- referenceUnit-economics and retention practice
- referenceRGM analysis — build it on margin not revenue, segment it, treat it as a forecast, and read it only against CAC
Curated, non-competitor resources verified per term.
Related training
Disciplines
Areas of marketing where ltv (lifetime value) is a core concern: