Customer acquisition cost, or CAC, is the total money you spend to get one new customer. The basic formula is total sales and marketing cost divided by the number of new customers in a given period.
That sounds obvious until you try to measure it honestly. CAC can include ad spend, sales salaries, marketing software, content creation, lead nurturing, and onboarding costs if they are part of getting the customer over the line. HubSpot also notes that the number matters most when you compare it to customer lifetime value, because a business can grow fast and still lose money if each customer costs too much to acquire.
CAC is useful because it forces discipline. If one campaign brings in leads cheaply but those leads never convert, the CAC rises. If another channel produces fewer customers but at a much lower cost, it may be the better bet even if it looks smaller on the surface.
Want the full picture?
🧊 AI Search vs Google — How Discovery Is Changing for Local Businesses
Google still dominates search, but ChatGPT, Perplexity, and Gemini are becoming how more people find answers — and they work differently. For local businesses, showing up in AI answers requires a different strategy than ranking on Google.
More in Small Business
Can AI replace human sales reps?
AI can help with sales tasks, but trust, nuance, and relationship-building still make humans necessary in many deals.
📋 Small Business 3 weeks ago 2 min readDo I need a separate business bank account?
Yes — once you form an LLC or corporation it is required. Even as a sole proprietor, separating personal and business money saves hours of tax pain and is the cheapest cleanup you can make for your books.
📋 Small Business 5 weeks ago 3 min readDo I Need a Website If I Have a Facebook Page?
Yes. A Facebook page is rented space — you do not control the algorithm, own your audience, or rank in Google search the same way. A simple one-page site with your hours and phone gives you credibility and control.
📋 Small Business 7 weeks ago 3 min read