Customer Acquisition Cost (CAC) Calculator

Customer Acquisition Cost (CAC) is the total cost of acquiring a new customer, including all marketing and sales expenses. It's calculated by dividing your total acquisition spending (ads, salaries, tools, content, etc.) by the number of new customers gained in the same period. CAC is one of the most important unit economics metrics for any business.

CAC = Total Sales & Marketing Costs ÷ Number of New Customers Acquired. For example, if you spent $10,000 on marketing last month and acquired 100 new customers, your CAC is $100. Include all related costs: ad spend, marketing team salaries, sales commissions, software tools, and content production.

There's no universal 'good' CAC—it depends on your LTV. The key benchmark is the LTV:CAC ratio, which should be at least 3:1. A SaaS startup with $3,000 LTV can afford a $1,000 CAC. An e-commerce business with $50 LTV should target CAC under $17. Industry averages vary: SaaS ($200–$2,000), e-commerce ($10–$100), fintech ($200–$1,500).

CAC (Customer Acquisition Cost) measures the full cost of acquiring a paying customer, including all sales and marketing overhead. CPA (Cost Per Acquisition) typically refers to the cost of a specific campaign or channel action (like a signup or lead). CAC is broader and more comprehensive—it's a business-level metric, while CPA is a campaign-level metric.

Key strategies include: improving conversion rates at each funnel stage, investing in organic channels (SEO, content marketing, referrals) that compound over time, optimizing ad targeting and creative, shortening the sales cycle, building a strong brand that generates word-of-mouth, and using product-led growth where the product itself drives acquisition.

Yes—a fully-loaded CAC includes all costs related to acquisition: marketing team salaries, sales rep compensation and commissions, software/tool subscriptions, agency fees, ad spend, content production costs, and event expenses. Some companies calculate both a 'blended CAC' (all costs) and a 'paid CAC' (ad spend only) to understand different perspectives.

CAC differs significantly by channel. Organic search and referrals typically have the lowest CAC since there's no per-click cost. Paid social and search ads have moderate CAC but are scalable. Outbound sales has high CAC due to rep salaries but works for high-ACV deals. Track CAC per channel to allocate budget to your most efficient sources.

CAC payback period is the number of months it takes to recoup the cost of acquiring a customer through their revenue. It's calculated as: CAC ÷ Monthly Revenue Per Customer. A payback period under 12 months is considered healthy for SaaS. Over 18 months signals a potential cash flow problem, since you're funding acquisition far ahead of returns.