What is LTV (Lifetime Value)?
In short
Lifetime value is the total margin a customer brings across every order they place, not just the first one. It is the number that tells you how much you can afford to spend to acquire that customer, which is why it is always read next to acquisition cost.
Customer Lifetime Value (LTV) is a crucial metric. If it costs you $20 to acquire a customer, but they spend $500 over three years, your business is highly profitable. Focusing on LTV reduces dependency on constant ad spend.
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Try ShopifyHow it works in practice
LTV is not a single formula. Most stores use a simple version: average order value multiplied by the expected number of orders per customer, minus the cost of goods and fulfilment. The result is a margin figure, not revenue, which is the only version worth comparing with acquisition cost.
The number becomes useful when it is split by group. Customers who arrived through a discount campaign usually behave differently from customers who found you through search. Splitting LTV by acquisition channel and by first product purchased shows which entry points are worth paying more for.
Time matters too. A customer who returns after fourteen months looks profitable on paper, but the cash was tied up the whole time. This is why many stores track both LTV and the time it takes to recover the acquisition cost.
Why it matters for an online store in the EU
Advertising auctions reward whoever can afford the highest bid, and a store with a higher LTV can afford more per click. There is also a practical side specific to the EU: returns are common, cross-border shipping is expensive, and both eat into the margin a repeat customer brings. A store selling consumables — cosmetics, coffee, pet food — has a natural advantage here, because the reason to come back is built into the product.
Common mistakes
- Using revenue instead of margin, which makes every customer look profitable.
- Applying one average LTV to all channels, hiding the ones that lose money.
- Ignoring returns and refunds when calculating the value of a customer.
- Assuming a repeat purchase pattern that the store has not been running long enough to observe.
- Buying repeat orders with permanent discounts, which lowers the margin the metric is supposed to measure.
Related terms
- CAC — the number LTV must be compared with.
- AOV — one of the two inputs in the calculation.
- ROAS — the short-term view of the same spending.
- Cross-selling — a direct way to raise order value.
- Retargeting — how existing customers are brought back.
- Conversion rate — the first step before any repeat purchase.
- Shopify agency in Europe — store, tracking and campaign setup.
- About Sell Easy — the team behind these guides.
Frequently asked questions about LTV
How is LTV calculated?
A practical version multiplies average order value by the number of orders a customer places over a chosen period, then subtracts the cost of goods and fulfilment. Pick a fixed window, such as twelve or twenty-four months, and keep it. Lifetime numbers based on guesswork about future years are easy to inflate.
Why compare LTV with CAC?
Because that comparison decides whether growth is sustainable. If a customer costs more to acquire than they will ever return in margin, more advertising simply means losing money faster. Looking at the two together also tells you how long you can wait before the acquisition cost is paid back.
What actually increases LTV?
Repeat purchases. In practice that means reliable delivery, a return process that does not punish the customer, a product range worth coming back for, and email or SMS follow-ups timed to when the product runs out. Discount-only loyalty schemes tend to train people to wait for the next offer.