Find total acquisition spend required for each new customer.
Tip: figures are local to your browser and are not uploaded.
The Customer Acquisition Cost Calculator reveals exactly how much your business spends to win each new paying customer. By combining your sales and marketing expenses against new customer volume, you gain a critical metric for budgeting, growth planning, and evaluating channel efficiency.
Customer acquisition cost, or CAC, is the total sales and marketing investment divided by the number of new customers acquired during a given period. It is one of the most important unit economics metrics for any business, from early-stage startups to established enterprises. A rising CAC can signal inefficient campaigns or market saturation, while a declining CAC suggests your growth engine is becoming more efficient. This free, browser-based calculator makes it easy to track this vital figure without spreadsheets or logins.
Enter your total sales costs, including salaries, commissions, and tools, followed by your total marketing spend for the same period. Then input the number of new customers acquired. Click Calculate and the tool instantly displays your CAC along with contextual insights. All data stays in your browser and is never uploaded. Run the calculation monthly or quarterly to track trends and identify which periods delivered the most cost-effective growth.
There is no universal "good" CAC figure because the metric only becomes meaningful when compared against customer lifetime value (LTV). The widely cited benchmark is an LTV-to-CAC ratio of at least 3:1, meaning each customer should generate at least three times what it cost to acquire them over their lifetime. A ratio below 2:1 suggests your acquisition spending is unsustainably high relative to the revenue each customer produces. SaaS businesses with monthly recurring revenue and high retention rates can often sustain higher CAC because LTV compounds over years of subscription. E-commerce businesses with lower repeat purchase rates typically need lower CAC to remain profitable. Calculate your LTV first, then determine the maximum CAC your unit economics can support, rather than benchmarking against competitors whose margin structure may differ significantly from yours.
A complete CAC calculation includes all costs directly associated with acquiring new customers during the measurement period. Sales costs should include the salaries and employment costs of sales staff, commissions paid on new customer deals, sales tools and CRM software, and travel or hospitality costs for client meetings. Marketing costs should include all paid advertising spend across channels, content creation costs, SEO agency or contractor fees, marketing automation software subscriptions, event sponsorships and participation costs, and the salaries of marketing team members involved in demand generation. Costs associated with serving existing customers, such as account management or customer success, should be excluded from CAC and attributed to retention metrics instead. Including only media spend while excluding staff and tool costs significantly understates your true acquisition cost per customer.
Yes. All values entered into the Customer Acquisition Cost Calculator — including sales costs, marketing spend, and customer numbers — are processed entirely within your browser and are never transmitted to or stored by Popupnote.com's servers. The tool operates fully client-side using JavaScript. No business or financial data is logged or shared. Closing or refreshing the page clears all entered values.