Cost Per Acquisition (CPA)
Cost per acquisition (CPA) is the total marketing and sales cost required to acquire one paying customer, calculated by dividing total spend by the number of customers won.
In depth
CPA is a bottom-funnel metric that ties spend directly to revenue-generating outcomes rather than intermediate steps. You compute it by dividing the relevant spend by acquired customers, but the strategic use is comparing CPA against customer lifetime value (LTV). When LTV comfortably exceeds CPA, you can scale spend confidently; when the gap narrows, growth becomes unprofitable.
A frequent pitfall is treating every conversion as equal and ignoring how lead quality upstream determines CPA. If your funnel floods sales with unqualified contacts, reps waste time and CPA balloons even when CPL looks fine. Quiz funnels improve CPA by scoring respondents before handoff, so sales spends time on hot tiers, close rates rise, and the same ad budget acquires more customers per dollar.
Example in practice
Frequently asked questions
What is the difference between CPA and CPL?
CPL measures the cost to capture a lead, while CPA measures the cost to acquire a paying customer. CPA sits further down the funnel and is usually higher because not every lead converts.
How does CPA relate to LTV?
CPA should be compared against customer lifetime value to judge whether growth is profitable. A common healthy guideline is an LTV at least three times your CPA, though it varies by business model.
How can I reduce my CPA?
Improve lead quality so sales closes more efficiently, tighten targeting, and lift conversion rates with engaging funnels. Higher-quality leads from a scored quiz reduce wasted sales effort and lower CPA.