CPA (Cost Per Acquisition)
The cost to acquire one paying customer through advertising.
What is CPA (Cost Per Acquisition)?
Cost Per Acquisition (CPA) measures the total cost to acquire one paying customer. It's also called Cost Per Action or Customer Acquisition Cost (CAC).
Formula: CPA = Total Ad Spend ÷ Number of Customers Acquired. If you spend $2,000 on ads and get 20 customers, your CPA is $100.
CPA differs from CPL (Cost Per Lead) - CPA measures paying customers, while CPL measures leads who haven't yet purchased. Your CPA will always be higher than CPL.
Target CPA depends on customer lifetime value (CLV). A sustainable business model has CPA significantly below CLV. Common ratio is CPA should be 3:1 or better relative to CLV (e.g., $100 CPA for $300 CLV).
CPA for New Zealand Businesses
NZ CPA benchmarks vary widely by industry: trade services $100-$300, professional services $300-$800, B2B software $500-$2,000+.
Calculate true CPA by including all acquisition costs: ad spend, agency fees, creative production, and tools/software. Don't just measure ad spend.
Factor in NZ's longer sales cycles for higher-ticket services. Your CPA calculation should align with your typical time-to-close.
NZ Business Examples
-
A Tauranga plumber spends $1,500 on Google Ads monthly, acquiring 12 new customers, achieving $125 CPA -
A Wellington SaaS company invests $8,000 in mixed channels, signing 10 annual contracts at $800 CPA -
An Auckland e-commerce store spends $5,000 on Meta Ads, generating 200 first-time customers at $25 CPA
Real-World Industry Examples
E-commerce
An online skincare brand optimizes Meta Ads and email marketing
Reduces CPA from $35 to $22 while maintaining customer quality and $85 average order value
Service Business
A landscaping company tracks CPA across Google Ads, Facebook, and referrals
Discovers Google delivers $180 CPA vs Facebook's $240 CPA, shifts budget accordingly
Subscription Business
A meal kit delivery service calculates CPA including trial conversion
Accepts $60 CPA knowing 70% of trials convert to paying subscribers with $400 LTV
Related Terms
Frequently Asked Questions
What's the difference between CPA and CAC?
They're essentially the same - both measure customer acquisition cost. CPA is often used for advertising-specific costs, while CAC may include all acquisition costs (sales team, marketing, tools, etc.). Context determines usage.
What's a good CPA?
A good CPA is one that allows profitable growth. As a rule, CPA should be ≤33% of customer lifetime value (3:1 LTV:CAC ratio). For subscription businesses, aim for payback period of 12 months or less.
How can I lower my CPA?
Improve conversion rates (better landing pages), optimize targeting (reduce wasted spend), enhance creative (higher CTR), implement retargeting, improve lead nurturing, and focus on channels with best CPA performance.
Need Help With Your Marketing Metrics?
Our team specializes in delivering 30 qualified leads in 30 days for NZ service businesses. We handle the strategy, execution, and optimization - you handle the sales.