Customer Acquisition Cost Calculator
Calculate the cost to acquire each new customer and compare against industry benchmarks.
Results
Visualization
How It Works
Customer Acquisition Cost (CAC) is the average amount you spend to acquire one new paying customer. It is calculated by dividing total marketing spend by the number of new customers acquired in the same period. Keeping CAC below your customer lifetime value (CLV) is essential for long-term profitability.
The Formula
Variables
- CAC — Average cost to acquire one new customer
- Marketing Spend — All marketing and advertising costs in the period
- New Customers — Number of first-time buyers in the same period
Worked Example
You spend $5,000 on ads and marketing in one month and acquire 100 new customers. Your CAC is $5,000 / 100 = $50. If your average order value is $80 and gross margin is 50%, your gross profit per customer is $40 — barely covering acquisition. You would need to retain customers for repeat purchases to be profitable.
Practical Tips
- Always include all marketing costs in your CAC calculation — agency fees, tools, creative production, and salaries, not just ad spend.
- A healthy rule of thumb is CLV:CAC ratio of 3:1 or higher — your customers should be worth at least 3x what they cost to acquire.
- Reducing CAC is usually harder than increasing retention — focus on improving LTV alongside lowering CAC.
- Separate CAC by channel (paid social, search, organic, email) to identify your most efficient acquisition channels.
- Seasonal businesses should calculate CAC over a full year rather than a single high-spend month to avoid distorted numbers.
Frequently Asked Questions
What is a good CAC for e-commerce?
E-commerce CAC varies widely by niche. Apparel averages around $49, beauty around $52, electronics around $97, and home goods around $129. The key metric is not CAC alone but your CLV:CAC ratio — aim for 3:1 or better.
What costs should I include in CAC?
Include all costs directly tied to customer acquisition: paid ads, influencer fees, affiliate commissions, agency retainers, marketing software subscriptions, and a portion of staff time spent on acquisition activities. Do not include retention marketing costs.
How is CAC different from cost per acquisition (CPA)?
CPA measures the cost per conversion event (including repeat purchases), while CAC measures cost per new customer only. CAC is typically higher than CPA because it excludes returning customers who are cheaper to convert.
How can I lower my CAC?
Lower CAC by improving ad creative and targeting to raise conversion rates, investing in SEO and content for organic traffic, launching referral programs that turn existing customers into low-cost acquisition channels, and improving landing page conversion rates.
How often should I recalculate CAC?
Calculate CAC monthly to spot trends, and quarterly for strategic planning. Compare the same periods year-over-year to account for seasonality — a high December CAC may be normal given competitive ad costs during the holiday season.