Calculate your customer acquisition cost (CAC) by dividing total marketing spend by new customers acquired. Optimize ad budgets and improve profitability.
Customer acquisition cost (CAC) is one of the most important metrics for any e-commerce business. It tells you exactly how much you spend in marketing and sales to win a single new customer. If your CAC is higher than the profit a customer generates, you're losing money on every sale.
This calculator divides your total marketing and advertising spend over a given period by the number of new customers acquired during that same period. The result is your cost per acquisition — the price tag on each new buyer.
Understanding CAC helps you set marketing budgets, evaluate channel performance, negotiate affiliate and influencer deals, and determine whether your unit economics are sustainable. Pairing CAC with lifetime value (LTV) creates a complete picture of profitability. A healthy e-commerce business typically targets a CAC that is one-third or less of customer LTV. Whether you are a beginner or experienced professional, this free online tool provides instant, reliable results without manual computation.
Knowing your CAC helps you allocate marketing dollars efficiently, identify underperforming channels, and forecast profitability. Without it, you're flying blind on whether your ads are actually making money. This calculator provides an instant, clear answer. Having a precise figure at your fingertips empowers better planning and more confident decisions. Manual calculations are error-prone and time-consuming; this tool delivers verified results in seconds so you can focus on strategy.
CAC = Total Marketing Spend / New Customers Acquired Fully Loaded CAC = (Marketing Spend + Sales Costs + Overhead) / New Customers
Result: CAC: $50.00 | Fully Loaded CAC: $65.00
With $10,000 in marketing spend and 200 new customers, the basic CAC is $10,000 / 200 = $50.00. Adding $2,000 in sales costs and $1,000 in overhead, the fully loaded CAC becomes $13,000 / 200 = $65.00. If average customer LTV is $195 or more, the 3:1 LTV:CAC benchmark is met.
CAC directly impacts profitability. If you spend $50 to acquire a customer who only generates $40 in profit over their lifetime, you lose $10 per customer. Scaling that means scaling your losses. CAC is the foundation of sustainable growth.
Simple CAC only divides ad spend by customers. Fully loaded CAC includes all costs: team salaries, tools, creative production, and overhead. Fully loaded CAC gives a more accurate picture but is harder to calculate. Most investors and analysts prefer fully loaded CAC when evaluating business health.
Break down CAC by channel to find your most efficient sources. Organic search and email typically have the lowest CAC, while paid social and display ads tend to be higher. However, paid channels offer more control over volume. The best strategy blends low-CAC organic channels with scalable paid channels.
A good CAC depends on your industry and average order value, but most profitable e-commerce brands keep CAC below one-third of customer lifetime value. For low-ticket items this might be $5–15; for high-ticket products $50–200 can still be healthy if LTV is proportionally high.
Include all paid advertising (Google, Meta, TikTok), influencer fees, affiliate commissions, content creation costs, email platform fees, and agency retainers. For fully loaded CAC, also add marketing team salaries and related software subscriptions.
CPA (cost per acquisition) typically refers to a single channel or campaign, while CAC measures the blended cost across all marketing efforts. CPA is useful for optimizing individual ads; CAC gives you the big-picture view of overall acquisition efficiency.
Calculate CAC monthly at minimum. Weekly tracking is useful during heavy ad-spend periods like Black Friday. Always compare the same time periods year-over-year to account for seasonal variation in both spend and customer volume.
Common reasons include rising ad costs (CPMs), audience saturation, increased competition, and diminishing returns from scaling spend too fast. Diversifying channels, improving conversion rates, and investing in organic content can help counter rising CAC.
Yes. Improve landing page conversion rates, optimize ad creative and targeting, invest in SEO and content marketing for organic traffic, build referral programs, and grow your email list. Higher conversion rates mean more customers from the same spend.