Attribution & Analytics
LTV vs CAC for Ecommerce: What Should You Aim For?
LTV:CAC compares the value a customer generates over time with the cost to acquire that customer. It is useful because first-order ROAS can make high-retention businesses look worse than they really are.
Do not blindly chase a universal ratio
A common benchmark ratio may be quoted online, but the appropriate relationship depends on cash flow, payback time, margin, retention certainty and growth stage.
A business with a long payback period can run out of cash even if theoretical lifetime value is high.
Use contribution LTV, not revenue LTV
If a customer spends $500 over a lifetime but products have 30% contribution margin, the business does not have $500 available to recover acquisition cost.
Make LTV evidence-based
Do not assume every new customer will behave like your best long-term cohort. Use actual retention by acquisition period, product and channel.
Pair ratio with payback
Two businesses can both have strong LTV:CAC. One recovers acquisition in 30 days and the other in 18 months. Their ability to scale is very different.
Use LTV:CAC to widen the view beyond first order, but keep the assumptions conservative enough to make real budget decisions.
Not sure if ROAS is telling the full story?
If first-order ROAS looks weak but your customers reorder frequently, send us an inquiry. We can help connect acquisition spend to actual customer value.