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CAC (Customer Acquisition Cost)
Definition
The total cost of acquiring a new customer, including marketing and sales expenses. A healthy business has LTV significantly higher than CAC.
In Detail
CAC goes beyond simple CPA by including all costs involved in acquiring a customer — not just ad spend but also salaries of the marketing team, creative production costs, software tools, agency fees, and overhead. For example, if a company spends $100,000/month on ads, $30,000 on marketing salaries, $5,000 on tools, and acquires 2,000 customers, the true CAC is $67.50 per customer, not just the $50 ad cost per conversion. In the affiliate marketing ecosystem, CAC is primarily used by advertisers and product owners to set CPA rates for their affiliate programs. If an online casino calculates their CAC at $80 including all internal costs, they might offer affiliates $60-$70 CPA, keeping a margin for profitability. The CAC payback period — how many months it takes for a customer's revenue to cover their acquisition cost — is another crucial metric. SaaS companies aim for 12 months or less. In affiliate marketing careers, understanding CAC is essential for affiliate managers and business development roles. When negotiating with advertisers, knowing their approximate CAC helps you argue for higher payouts. Companies hiring affiliate team leads expect candidates to understand how CAC relates to LTV and how to optimize the full acquisition funnel, not just the advertising portion. Data analysts in affiliate companies build CAC models that factor in traffic source, GEO, device type, and seasonality.
Related Terms
LTV (Lifetime Value)
The total revenue a customer generates throughout their relationship with a business. Used to determine how much to spend on acquiring customers.
ROI (Return on Investment)
A metric measuring the profitability of an investment. Calculated as (Revenue - Cost) / Cost × 100%. Positive ROI means profit, negative means loss.
CPA (Cost Per Action)
A pricing model where advertisers pay for a specific action taken by a user, such as a purchase, sign-up, or deposit. CPA is the most common model in affiliate marketing.
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