Calculate your customer acquisition cost before you spend.
Customer acquisition cost (CAC) is the single most important metric for deciding whether paid acquisition can work. If it costs more to acquire a customer than they are worth, the business model does not work — no matter how good the product is.
1 free report. No credit card.CPC is your volume-weighted cost per click. Conversion rate is the percentage of visitors who become paying customers, expressed as a decimal (2% = 0.02).
What is customer acquisition cost?
CAC is the total cost of acquiring one paying customer. For paid search, it is driven by two variables: how much you pay per click (CPC) and what percentage of visitors convert to customers.
If your CPC is $2 and 2% of visitors convert, your CAC is $100. That means every customer costs you $100 in ad spend — before variable costs, fixed costs, or profit.
The CAC formula
For paid search, the formula is straightforward:
- CAC = cost per click / conversion rate (as a decimal)
- Example: $2.00 CPC / 0.02 conversion = $100 CAC
- Example: $2.00 CPC / 0.05 conversion = $40 CAC
What is a good CAC?
There is no universal "good" CAC — it depends entirely on your price and margins. A $100 CAC is fantastic for a $1,000 product with low variable costs. It is catastrophic for a $10 product.
The real question is: does CAC leave enough room for variable costs, fixed costs, and profit? If your price is $150, variable cost is $20, and CAC is $100, you have $30 per customer to cover fixed costs and profit.
How to calculate your CAC with real data
The product pulls live CPC data for your keywords, applies your price and cost structure, and calculates CAC across a range of conversion rates. You see exactly what CAC you would face at 0.5%, 1%, 2%, 5%, and 10% conversion — before you spend a dollar on ads.
You can also model different price points and cap your maximum CPC to see how CAC shifts. Run separate reports for different keyword sets or target countries.
Run it on your own idea.
Add your price, cost structure, and buyer searches. The report tells you whether the opportunity has enough demand and margin room — in about 2 minutes.
See how this applies to your role.
These use cases show how the same demand and economics analysis works for specific types of businesses.
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Common questions.
Is CAC the same as cost per click?
No. CPC is what you pay for one click. CAC is what you pay for one customer. If your CPC is $2 and your conversion rate is 2%, your CAC is $100 because you need 50 clicks (at $2 each) to get one customer.
How do I lower my CAC?
Three levers: lower CPC (target cheaper keywords), improve conversion rate (better landing page, offer, or targeting), or raise your price so you can afford a higher CAC. The report shows all three in one view.
What if my CAC is higher than my price?
Then paid search cannot work at your current price and conversion rate. You need to raise the price, reduce costs, or find a lower-CPC channel. The report flags this automatically with a "No" recommendation.
Calculate your customer acquisition cost before you spend.
Understand customer acquisition cost (CAC), the formula, industry benchmarks, and how to calculate it for your product using real search data.