Calculate your Customer Acquisition Cost.
Calculate how much your business spends to acquire each new customer. Combine advertising, marketing and sales expenses to measure acquisition efficiency and understand whether customer growth is profitable.
Your acquisition numbers
Include paid social, search ads, display campaigns and other direct advertising costs.
Include content, agencies, creative production, email software and marketing tools.
Include sales commissions, salaries or other customer acquisition expenses.
Optional, but useful for comparing acquisition cost with initial customer revenue.
AI CAC Analysis
Enter your acquisition expenses and new customer count to receive an instant CAC analysis.
Growth only works when customers are profitable.
MarginLab helps Shopify merchants understand whether revenue, product costs, discounts and acquisition performance are creating real profit or hiding margin leaks.
How to use this Customer Acquisition Cost (CAC) calculator
Enter your advertising spend, marketing expenses, sales costs and the number of new customers acquired during the selected period. The calculator instantly determines your Customer Acquisition Cost (CAC), evaluates acquisition efficiency and estimates how much of your first-order revenue is consumed by customer acquisition.
Include advertising spend, marketing expenses and sales-related costs associated with acquiring new customers during the selected period.
Enter the total number of new customers acquired and, optionally, the average first-order value to compare acquisition cost against customer revenue.
Review your Customer Acquisition Cost, acquisition efficiency, first-order recovery and AI insights to understand whether your customer growth is financially sustainable.
Customer Acquisition Cost (CAC) formula explained
Customer Acquisition Cost (CAC) measures how much your business spends to acquire one new customer. It is one of the most important ecommerce and SaaS metrics because it directly affects profitability, marketing efficiency and long-term business growth. Understanding CAC allows businesses to evaluate whether marketing investments generate sustainable returns.
Customer Acquisition Cost formula
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New Customers Acquired
The result represents the average amount spent to acquire a single new customer during the selected period.
CAC efficiency analysis
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Average First Order Value
Comparing Customer Acquisition Cost with first-order revenue helps estimate how quickly acquisition costs are recovered and whether customer growth is financially sustainable.
Example calculation
What is a good Customer Acquisition Cost?
There is no universal good Customer Acquisition Cost because the ideal CAC depends on your Average Order Value, product margin and Customer Lifetime Value. A useful first check is to compare CAC with the revenue generated by a customer’s first order.
Unsustainable
Acquisition cost equals or exceeds first-order revenue, making profitability dependent on repeat purchases and strong customer retention.
High Risk
A large share of first-order revenue is consumed by acquisition costs, leaving limited room for product costs and profit.
Needs Improvement
Customer acquisition may be workable, but stronger conversion, higher order value or better margins could improve efficiency.
Healthy
Acquisition cost represents a manageable share of first-order revenue, creating more room for costs and profitable growth.
- CAC should always be compared with Customer Lifetime Value and product margin.
- A low CAC is not useful when acquired customers generate weak or negative profit.
- Increasing conversion rate and Average Order Value can improve acquisition efficiency.
- MarginLab connects revenue, product costs, discounts and profitability to reveal whether customer growth creates real profit.
Common Customer Acquisition Cost (CAC) mistakes
Customer Acquisition Cost is one of the most important growth metrics for ecommerce businesses, yet many companies calculate it incorrectly or evaluate it without considering profitability. These mistakes often lead to unsustainable marketing strategies and misleading business decisions.
Ignoring hidden acquisition costs
Many businesses only include advertising spend while excluding agency fees, software subscriptions, salaries, creative production and sales expenses that directly contribute to customer acquisition.
Looking only at Customer Acquisition Cost
A low CAC isn’t automatically good. Acquisition cost should always be evaluated together with Average Order Value, gross margin and Customer Lifetime Value.
Optimizing for cheap customers
Reducing acquisition cost alone can attract lower-quality customers who spend less, purchase only once or generate weak long-term profitability.
Measuring CAC only occasionally
Customer Acquisition Cost changes constantly as advertising costs, conversion rates and competition evolve. Continuous monitoring helps identify deteriorating marketing performance before profitability declines.
Why Customer Acquisition Cost matters
Customer Acquisition Cost (CAC) is one of the most important metrics for any ecommerce business because it determines how much you invest to acquire each new customer. Even stores with growing revenue can become unprofitable if acquisition costs increase faster than customer value. Monitoring CAC helps businesses scale sustainably while protecting long-term profitability.
Common customer acquisition challenges
- Advertising costs increase faster than revenue.
- Customer acquisition becomes more expensive as competition grows.
- Low conversion rates inflate acquisition costs.
- Average Order Value is too low to recover marketing spend quickly.
- Businesses optimize campaigns without measuring profitability.
How MarginLab helps
MarginLab doesn’t stop at measuring Customer Acquisition Cost. It connects marketing performance with product costs, gross margins, discounts, refunds and profitability to determine whether acquiring new customers actually generates sustainable profit for your Shopify business.
Use this calculator to estimate your Customer Acquisition Cost. Use MarginLab to continuously monitor acquisition efficiency, identify hidden profit leaks and understand whether your marketing investment is creating real business growth.
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Evaluate how efficiently your core business converts revenue into operating profit.Frequently asked questions
These are some of the most common questions about Customer Acquisition Cost (CAC), marketing efficiency and ecommerce profitability.
What is Customer Acquisition Cost (CAC)?
Customer Acquisition Cost (CAC) measures the average amount your business spends to acquire one new customer. It includes advertising, marketing and sales expenses divided by the number of new customers acquired during a specific period.
How do you calculate Customer Acquisition Cost?
Add together all acquisition-related costs, including advertising, marketing and sales expenses, then divide the total by the number of new customers acquired. The result is your average acquisition cost per customer.
What is considered a good CAC?
There is no universal benchmark because a good CAC depends on your Average Order Value, gross margin and Customer Lifetime Value (LTV). In general, lower acquisition costs relative to customer value indicate healthier and more sustainable growth.
Why is CAC important for ecommerce?
Customer Acquisition Cost helps businesses determine whether marketing investments are generating profitable growth. Rising sales are far less valuable if acquisition costs increase even faster than customer revenue.
Should CAC be analyzed together with LTV?
Yes. Customer Lifetime Value (LTV) measures the long-term revenue generated by each customer, while CAC measures the cost to acquire them. Comparing both metrics provides a much clearer picture of marketing profitability and business sustainability.
Does MarginLab analyze customer profitability?
Yes. MarginLab combines acquisition performance with product margins, discounts, refunds and profitability metrics, helping Shopify merchants understand whether new customers generate real long-term profit rather than simply increasing revenue.
Acquiring customers is not enough.
They must generate real profit.
This calculator helps you estimate Customer Acquisition Cost and compare it with first-order revenue. MarginLab goes further by connecting acquisition performance with product costs, discounts, refunds and margins, helping Shopify merchants understand whether new customers are creating sustainable profit or quietly increasing financial risk.
Customer Profitability
Understand whether customer revenue remains profitable after acquisition costs, product costs, discounts and other margin pressures.
Acquisition Risk Detection
Identify when increasing advertising costs or weak order values make customer growth financially unsustainable.
AI Profit Intelligence
Receive clear insights that connect revenue growth with real profitability and highlight practical opportunities to improve customer economics.
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