What is Cost per Acquisition (CPA)
CPA (Cost per Acquisition) refers to the average cost of acquiring a single paying customer. Unlike CPL, which measures the cost per lead, CPA reflects the actual result – that is, a completed conversion.
Calculation:
CPA = total campaign cost / number of customers acquired
For example:
You spend 60,000 CZK on a campaign and acquire 6 new clients.
CPA = 60,000 / 6 = 10,000 CZK
CPA can be measured at the level of the entire campaign, as well as by channels, segments or product lines.
Why CPA is important for B2B companies
- It shows the true cost of business success
Unlike CPL, it tracks the final outcome – not just a lead, but a paying customer. - It helps set a sensible acquisition budget
If you know your margin and CLV, you know how much you can afford to invest in acquisition. - It allows you to compare channels and campaigns by performance Does
Google Ads deliver cheaper leads, but with a higher CPA than LinkedIn? Consider which offers greater value. - It increases the accuracy of ROI calculations
CPA is a key component in calculating the return on marketing investment. - Supports strategic decision-making
Companies with a high CPA may need to reassess their business processes, product offerings or target segments.
Practical application and examples
- Comparison of campaigns by CPA
Campaign A: CPL 300 CZK, CPA 6,000 CZK
Campaign B: CPL 600 CZK, CPA 4,200 CZK
Result: Campaign B has a higher cost per lead but a lower CPA → more effective - Calculating the optimal CPA based on CLV Customer
CLV = CZK 120,
000 Target margin: 30%
Maximum CPA = CZK 36,000 - Change to the sales process to reduce CPA
The introduction of a pre-qualification form increased the conversion rate from lead to customer.
The result is a drop in CPA from 14,000 CZK to 9,500 CZK - Remarketing optimisation
The remarketing campaign had a higher CPL, but a conversion rate of 22% → CPA lower than for acquisition campaigns - A/B testing based on CPA
Two landing page variants have the same CPL but different conversion rates → CPA differs by 35%
5 tips for optimising CPA in B2B
- Focus on lead quality, not just quantity
Fewer but better-qualified leads = lower CPA. - Improve collaboration between marketing and sales A
clear definition of MQL/SQL helps prevent losses in the conversion process. - Monitor the entire funnel
Identify where leads are ‘dropping off’ and focus on optimising those points. - Invest in retention and cross-selling A
lower CPA isn’t the only way – a higher CLV will improve ROI even with a higher CPA. - Measure CPA by segment and product
CPA for small businesses will differ from that for enterprises – don’t compare apples with pears.
Related terms
- CPL (Cost per Lead) – precedes CPA in the funnel
- CLV (Customer Lifetime Value) – influences how high a CPA you can afford
- Marketing ROI – CPA is part of the return on investment calculation
Further resources
Summary
Cost per Acquisition shows you how much you actually pay for each new customer. In B2B, it is one of the most important metrics for managing the effectiveness of both marketing and sales. If you want to optimise your CPA and better align your marketing investments with business results, please do not hesitate to contact us.