Customer Acquisition Cost Explained for Small Business Owners
Learn what CAC measures, what expenses belong in the calculation, and how to compare acquisition cost with customer economics.
Key takeaway
CAC becomes useful when it is compared with the profit generated by acquired customers, not viewed as an isolated number.
What CAC measures
Customer acquisition cost estimates what the business spends to acquire a new customer. A basic version divides acquisition-related sales and marketing spend by new customers acquired in the same period.
Be consistent about what you include
Depending on the decision, acquisition cost may include advertising, agency fees, sales commissions, marketing software, and dedicated acquisition labor. Document the definition so month-to-month comparisons remain meaningful.
Compare CAC with customer value
Review first-sale margin, repeat purchases, retention, and service cost. A high CAC can still work if customers are profitable and remain valuable long enough.
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