Customer lifetime value

Customer lifetime value (CLV or LTV) is the total net profit you expect to earn from a customer over the entire duration of your relationship with them. It is arguably the single most important metric in marketing because it determines how much you can afford to spend acquiring a customer and still be profitable. If your LTV is 500 euros and your competitor’s is 200 euros, you can outbid them on every ad platform and still make money. That asymmetry is how companies with superior retention eat market share from companies that only optimize for first purchase.

The challenge is that LTV is hard to calculate accurately, especially early on. You are predicting future behavior based on historical patterns, and those patterns change as your product evolves, your customer mix shifts, and market conditions fluctuate. I have seen teams use overly optimistic LTV projections to justify unsustainable acquisition spending — it works great until the cohort data catches up with reality. Start with simple models, be conservative in your assumptions, and update your calculations as you gather more data.

What makes LTV transformative for growth teams is that it shifts the conversation from cost to investment. When you know the lifetime value of customers acquired from different channels, you can allocate budget with confidence. A channel that looks expensive on a cost-per-acquisition basis might be your most profitable when you factor in that those customers retain at twice the rate. LTV thinking also naturally pushes you toward improving the product and customer experience, because every improvement to retention multiplies the value of every customer you have already acquired.