RGM® Glossary · Finance / Unit Economics

Growth Glossary — Definition

SHT LTV

LTV (Customer Lifetime Value)

Customer Lifetime Value (LTV, sometimes CLV or CLTV) is the cumulative gross profit a single customer is expected to generate before they churn.…

Schematic — LTV (Customer Lifetime Value)

Term: LTV (Customer Lifetime Value)
Field: Finance / Unit Economics
Category: Finance & Unit Economics

What it means

Read that twice.Treat LTV (Customer Lifetime Value) as a unit-economics concept with a clear scope. Two people using the term should mean the same thing.

LTV matters because it sets the ceiling on what you can afford to spend acquiring customers. If average LTV is $1,000 and CAC is $400, you have profitable economics; if LTV is $300 and CAC is $400, every new customer makes you poorer.

LTV (Customer Lifetime Value) belongs to Finance & Unit Economics and refers to a unit-economics concept. A shared definition keeps the team aligned.

The mechanics

Here is the short version.LTV (Customer Lifetime Value) works one way for a lean team and another for a large one. The mechanics follow the context.

Think of LTV (Customer Lifetime Value) as context-bound. A small shop reads it simply; an enterprise reads it with more nuance. That is normal -- LTV (Customer Lifetime Value) is shaped by audience and channel mix. Read LTV (Customer Lifetime Value) without care and the plan wobbles; be precise and the read holds.

Keep the order simple: define LTV (Customer Lifetime Value) for your context, then decide how to act. Reverse it and the budget chases a number nobody agreed on. Start here.

When to reach for it

Read that twice.Reach for LTV (Customer Lifetime Value) when a real decision rides on it -- a budget, a metric, or a comparison. Otherwise it is reference.

Use LTV (Customer Lifetime Value) when it changes an outcome. For finance & unit economics teams, that tends to be three recurring moments. With no choice live, LTV (Customer Lifetime Value) is good to know, not to chase.

Setting budget. LTV (Customer Lifetime Value) guides the team toward the better-paying line.
Choosing a metric. LTV (Customer Lifetime Value) flags whether the number you report is causal.
Comparing options. LTV (Customer Lifetime Value) evens out a comparison that would otherwise mislead.

A worked example

One idea, plainly put.The walk-through runs LTV (Customer Lifetime Value) through work modeled on Dollar Shave Club, so the concept meets real constraints.

Take Dollar Shave Club. During a CAC-payback tightening, the team made LTV (Customer Lifetime Value) the deciding input, not an afterthought. They set a baseline first, agreed one definition of LTV (Customer Lifetime Value), and only then read the result: payback shortened from 14 to 9 months. The number matters less than the order.

The numbers behind LTV (Customer Lifetime Value) -- illustrative only, RGM analysis
Stage	What the team did	Why it mattered
Baseline	Took a before reading on LTV (Customer Lifetime Value).	A fixed point of truth.
Define	Agreed a single definition of LTV (Customer Lifetime Value).	A shared definition up front.
Act	A CAC-payback tightening — one variable.	Only one thing moved.
Result	Payback shortened from 14 to 9 months	A decision the data earned.

These LTV (Customer Lifetime Value) numbers are illustrative -- RGM analysis. The structure travels; the specific figures do not.

Failure modes to watch

Pick one definition.Four failure modes recur with LTV (Customer Lifetime Value). Name them and they are easy to design around.

One-size thinking. Using LTV (Customer Lifetime Value) flat across every segment. The right cut differs by channel and margin.
Bare numbers. Showing LTV (Customer Lifetime Value) on its own. Context is what makes it readable.
Chasing the word. Optimizing LTV (Customer Lifetime Value) for its own sake. Check it tracks a real outcome.
Bad compares. Benchmarking LTV (Customer Lifetime Value) with no adjustment. Account for the model differences first.

Common questions

How is LTV (Customer Lifetime Value) defined?

Customer Lifetime Value (LTV, sometimes CLV or CLTV) is the cumulative gross profit a single customer is expected to generate before they churn. It is the value side of unit economics; CAC is the cost side. Settle what LTV (Customer Lifetime Value) covers first; the strategy follows from there.

What makes LTV (Customer Lifetime Value) worth knowing?

LTV (Customer Lifetime Value) matters because vague vocabulary breaks strategy. A precise, shared definition keeps a team aligned.

How do teams use LTV (Customer Lifetime Value)?

Teams put LTV (Customer Lifetime Value) to work on a spend split, a metric, or a head-to-head call. See the Dollar Shave Club walk-through above.

What goes wrong with LTV (Customer Lifetime Value) most often?

Treating LTV (Customer Lifetime Value) as one blanket rule and reporting it with no baseline. Both hide a soft assumption.

How is LTV (Customer Lifetime Value) defined?: Customer Lifetime Value (LTV, sometimes CLV or CLTV) is the cumulative gross profit a single customer is expected to generate before they churn. It is the value side of unit economics; CAC is the cost side. Settle what LTV (Customer Lifetime Value) covers first; the strategy follows from there.
What makes LTV (Customer Lifetime Value) worth knowing?: LTV (Customer Lifetime Value) matters because vague vocabulary breaks strategy. A precise, shared definition keeps a team aligned.
How do teams use LTV (Customer Lifetime Value)?: Teams put LTV (Customer Lifetime Value) to work on a spend split, a metric, or a head-to-head call. See the Dollar Shave Club walk-through above.

What lifetime value really measures

Lifetime value is the total contribution a customer generates over their entire relationship with the business, not a single purchase. It matters because it sets the ceiling on what you can profitably spend to acquire a customer and reveals whether growth is durable: a business with high lifetime value can outbid rivals for the same customer and still profit, while one with low lifetime value is trapped chasing cheap, shallow acquisition. It reframes a customer from a one-time sale into an asset with a lifespan.

Calculating it honestly

A credible lifetime value uses contribution margin, not revenue, accounts for real retention and churn rather than optimistic assumptions, and discounts future value that arrives years out. The common error is projecting lifetime value from a few happy early cohorts and assuming retention holds, then watching the real number sag as churn bites. Conservative inputs and recalculation as cohorts age keep it trustworthy, because an inflated lifetime value justifies acquisition spend the business cannot actually support.

Why it only means something paired with CAC

Lifetime value in isolation is a vanity figure; its power comes from the ratio to customer acquisition cost and the payback period. A glorious lifetime value with a two-year payback can still bankrupt a business that runs out of cash while it waits, and a healthy LTV:CAC ratio with slow payback hides a cash-flow trap. Read lifetime value alongside CAC and payback, the trio that together decide how aggressively, and how safely, a business can grow.