Customer Lifetime Value (LTV)

Last updated: 2026-06-13

What it is

Customer Lifetime Value — written LTV or sometimes CLV — measures how much a single customer is worth to your business over the whole time they stay with you. A coffee subscriber who reorders for three years is worth far more than their first month suggests, and LTV is the number that captures that full relationship.

Most teams measure LTV as profit or gross margin, not raw revenue, because what you can reinvest into growth is the money left after delivering the product or service.

The simple formula

A common, plain-English version is:

LTV = Average Order Value × Purchase Frequency × Customer Lifespan × Gross Margin %

Hypothetical example: imagine a customer who spends USD 50 per order, buys 4 times a year, stays for 3 years, and you keep a 60% gross margin. Their LTV would be USD 50 × 4 × 3 × 0.60 = USD 360. (These figures are illustrative only — your real numbers come from your own analytics.)

Why it matters

LTV is the ceiling on what you can afford to spend to win a customer. If you know each customer is worth USD 360 in profit, you can budget acquisition spend with confidence instead of guessing. It turns ad spend from a cost into an investment with a known payback.

This is why LTV directly shapes acquisition budgets. The key relationship is LTV:CAC — lifetime value compared to your cost per acquisition (CAC). A widely cited rule of thumb is an LTV:CAC ratio of about 3:1, meaning each customer returns roughly three times what they cost to acquire. If your ratio is healthy, you can scale spend; if it slips toward 1:1, you are buying customers at a loss.

In practice

Teams use LTV to set the maximum bid in a PPC campaign, to decide which channels and audiences deserve more budget, and to judge whether a campaign's return on ad spend is sustainable over the long run rather than just on the first sale. A campaign that looks unprofitable on first-purchase ROAS can be very profitable once repeat purchases are counted in LTV.

Improving LTV — through better retention, upsells, or higher margins — quietly raises how much you can spend everywhere else, which is often a cheaper path to growth than simply buying more clicks.

Related terms

Explore connected glossary entries: CPA / Cost per Acquisition, ROAS, and PPC. For services that act on these numbers, see PPC Management and Conversion Rate Optimization.

FAQ

What is a good LTV:CAC ratio?

Many subscription and e-commerce businesses aim for an LTV:CAC ratio of roughly 3:1 as a rule of thumb, meaning each customer returns about three times what it cost to acquire them. The right target varies by industry, margin, and how quickly you recover the cost, so treat any single number as a starting point rather than a guarantee.

Is LTV the same as revenue?

No. Revenue is the total amount a customer pays you, while LTV is usually measured as profit or gross margin after the cost of delivering the product or service. Using gross-margin LTV gives a more honest picture of how much you can afford to spend acquiring each customer.

In short, LTV is the metric that tells you how much a customer is worth — and therefore how much you can safely spend to get them.

How Apex Marketings uses this

Our strategists build acquisition budgets around LTV:CAC so spend stays profitable as you scale. Learn more about PPC Management, or get a free consultation on how this applies to your business.