Customer Acquisition Cost
Customer Acquisition Cost (CAC) is the total investment required to convert a prospect into a paying customer. It is calculated by dividing all marketing, sales, advertising, and onboarding costs by the number of new customers acquired in a given period. CAC should include salary costs for marketing and sales teams, ad spend, software tools, creative production, and any commissions or incentives. Industry benchmarks range widely: B2B SaaS averages $200-$500, e-commerce averages $30-$100, and financial services can exceed $800 per customer.
Why It Matters
Customer acquisition cost determines the financial viability of growth strategies. When CAC exceeds the value a customer brings over their lifetime, the business loses money on every new customer. Tracking CAC by channel reveals which acquisition methods are sustainable and where to allocate budget. A healthy LTV:CAC ratio is typically 3:1 or higher, meaning a customer generates at least three times their acquisition cost in revenue. Monitoring CAC trends over time helps identify rising competition, market saturation, or declining marketing efficiency before they threaten profitability.
Example
A SaaS company spends $50,000 on marketing (ads, content, tools) and $30,000 on sales (salaries, commissions) in a quarter, acquiring 200 new customers. The CAC is $80,000 divided by 200, which equals $400 per customer. With an average customer lifetime value of $2,400 and a gross margin of 80%, the LTV:CAC ratio is 6:1 and the payback period is two months. The team breaks down CAC by channel: Google Ads delivers $320 CAC, organic content delivers $180 CAC, and paid social delivers $550 CAC, prompting a budget shift toward organic content and search.
Related Terms
CAC
Customer Acquisition Cost is the total cost of acquiring a new customer, including all marketing and sales expenses. The formula is CAC = Total Sales and Marketing Spend / Number of New Customers Acquired. A complete CAC calculation includes ad spend, agency fees, marketing salaries, software tools, content production, and sales team costs. CAC should be calculated by channel (paid social CAC, organic CAC, referral CAC) and by time period to identify trends. Industry benchmarks range from $10-$50 for e-commerce, $200-$500 for SaaS, and $500-$2,000 for enterprise software.
CLV / LTV
Customer Lifetime Value is the total revenue or profit a business can expect from a single customer account over the entire duration of the relationship. The basic CLV formula is: Average Order Value x Purchase Frequency x Average Customer Lifespan. More sophisticated models use predictive algorithms that account for churn probability, discount rates, and margin variations over time. For subscription businesses, CLV can be calculated as Average Monthly Revenue Per User divided by Monthly Churn Rate. Industry benchmarks show that increasing customer retention by just 5% can boost CLV by 25-95%. CLV helps determine how much to invest in customer acquisition and retention.