CAC
Cost to acquire one customer.
What does CAC mean?
Customer Acquisition Cost (CAC) measures how much it costs your business to acquire a single new customer. It includes all marketing and sales expenses over a given period divided by the number of new customers gained. CAC is a critical metric for understanding unit economics, evaluating the efficiency of growth strategies, and ensuring that the cost to win a customer does not exceed their lifetime value.
How to calculate CAC
CAC is calculated with the formula: CAC = (Total Marketing Cost + Total Sales Cost) / New Customers Acquired. For example, if you spend $50,000 on marketing and $30,000 on sales in a quarter and acquire 200 new customers, your CAC is ($50,000 + $30,000) / 200 = $400 per customer. The cost breakdown shows what percentage of your total acquisition spend goes to marketing versus sales.
FAQ
A "good" CAC depends on your industry, business model, and customer lifetime value (LTV). The general rule of thumb is that your LTV should be at least 3 times your CAC (LTV:CAC ratio of 3:1). SaaS companies typically target a CAC payback period of 12 months or less.
Include all expenses directly related to acquiring customers: advertising spend, marketing team salaries, sales team salaries and commissions, software and tools used for marketing and sales, content creation costs, and any agency fees. Do not include costs for serving or retaining existing customers.
While often used interchangeably, CAC typically refers to the cost of acquiring a paying customer and includes all sales and marketing expenses. CPA is broader and can refer to any type of acquisition — a lead, a signup, or a download — and is often used in the context of a single campaign or channel.
Common strategies include improving conversion rates at each stage of the funnel, investing in organic channels (SEO, content marketing, referrals), optimizing ad targeting and spend, shortening the sales cycle, and leveraging automation tools. Focusing on higher-intent audiences and improving onboarding can also help.
Most businesses calculate CAC monthly or quarterly. Monthly tracking helps spot trends early, while quarterly figures smooth out short-term fluctuations. It is also useful to calculate CAC by channel (e.g., paid ads vs. organic) to understand which acquisition strategies are most cost-effective.
Related calculators
- Customer LTV— Total revenue per customer.
- Churn Rate— Customer loss percentage.
- Break-Even— Point where revenue equals cost.
- ROI— Return relative to investment cost.