What is Customer Lifetime Value (LTV)?

Why It Matters

LTV is the number that makes every other growth decision make sense or fall apart, because it defines the ceiling on what a business can afford to spend acquiring a customer while still turning a profit. Without knowing LTV, a company has no real way to judge whether its acquisition spend, pricing, or retention efforts are working in its favor. LTV is also one of the clearest illustrations of how retention and acquisition are linked: since lifespan is one of the three inputs, even a modest improvement in how long customers stay can raise LTV as much as, or more than, a price increase would. That's why LTV is almost never looked at alone, it's paired with CAC to judge whether the economics of acquiring customers actually pay off over time.

Example

A customer pays $100 per month at a 70% gross margin and stays subscribed for an average of 24 months. LTV is $100 times 0.70, times 24, which equals $1,680. If that same company later improves retention so the average customer stays 30 months instead of 24, LTV rises to $2,100 with no change in price or margin at all, which is why reducing churn is often a faster path to higher lifetime value than raising prices or cutting acquisition costs. Comparing LTV against CAC is one of the most common health checks for whether a growth strategy is financially sustainable.

Frequently Asked Questions

• Is LTV based on revenue or profit?

  It depends on the business, but the formula shown here uses gross margin to convert revenue into a profit-based figure, since revenue alone overstates what a customer is actually worth once cost of delivering the product is accounted for.

• How is LTV different from average revenue per account?

  Average revenue per account is just one input into the LTV formula, capturing what a customer pays per period. LTV multiplies that by margin and expected lifespan to arrive at the customer's total value over the full relationship, not just a single period.

• What's considered a good LTV?

  There's no universal target since it depends heavily on price point and business model, but LTV is almost always judged relative to CAC rather than as a standalone number, commonly using a target ratio like 3 to 1 or higher.

• How often should LTV be recalculated?

  Most businesses recalculate it quarterly or whenever there's a meaningful shift in pricing, margin, or churn, since all three inputs can move LTV significantly and stale assumptions can mislead acquisition spending decisions.

• What's the fastest way to increase LTV?

  Improving retention so the average customer lifespan lengthens tends to have an outsized effect, as shown by the example where six additional months of retention raised LTV by $420 with no pricing change. Raising prices or improving margin are the other two levers.