Accounting Customer Acquisition Cost Calculator Examples
Worked customer acquisition cost examples for monthly, quarterly, and annual sales and marketing reporting.
These worked examples show how combined sales and marketing costs translate into an estimated blended customer acquisition cost. Each scenario uses a matching reporting period for spending and new-customer counts.
Monthly CAC for a local service business
The business runs local advertising and uses a small sales team to win new clients.
Input Summary
Reporting period
Monthly
Marketing spend
$3,600
Sales spend
$1,400
New customers acquired
25 customers
Calculation Breakdown
- 1Total acquisition spend$3,600 + $1,400$5,000
- 2Customer acquisition cost$5,000 ÷ 25$200 per new customer
Result Summary
Total acquisition spend
$5,000
Accounting Customer Acquisition Cost Calculator
The estimated monthly blended CAC is $200 per new customer.
Quarterly CAC for a growing online store
The company acquired customers across paid social, search, email, and direct sales activity.
Input Summary
Reporting period
Quarterly
Marketing spend
$45,000
Sales spend
$15,000
New customers acquired
400 customers
Calculation Breakdown
- 1Total acquisition spend$45,000 + $15,000$60,000
- 2Customer acquisition cost$60,000 ÷ 400$150 per new customer
Result Summary
Total acquisition spend
$60,000
Accounting Customer Acquisition Cost Calculator
The estimated quarterly blended CAC is $150 per new customer.
Annual CAC for a business with a longer sales cycle
Some early-year marketing activity contributes to customer wins later in the year, so an annual view is used.
Input Summary
Reporting period
Annually
Marketing spend
$180,000
Sales spend
$120,000
New customers acquired
750 customers
Calculation Breakdown
- 1Total acquisition spend$180,000 + $120,000$300,000
- 2Customer acquisition cost$300,000 ÷ 750$400 per new customer
Result Summary
Total acquisition spend
$300,000
Accounting Customer Acquisition Cost Calculator
The estimated annual blended CAC is $400 per new customer.
Higher-spend campaign period with fewer conversions
The business spent heavily on a product launch but acquired fewer customers than expected during that month.
Input Summary
Reporting period
Monthly
Marketing spend
$28,000
Sales spend
$7,000
New customers acquired
70 customers
Calculation Breakdown
- 1Total acquisition spend$28,000 + $7,000$35,000
- 2Customer acquisition cost$35,000 ÷ 70$500 per new customer
Result Summary
Total acquisition spend
$35,000
Accounting Customer Acquisition Cost Calculator
The estimated monthly blended CAC is $500 per new customer.
How to Read Your Results
CAC is an average cost per new customer, not the cost assigned to every individual customer.
Total acquisition spend shows the combined sales and marketing costs included in the calculation.
Compare periods only when the customer definition, cost allocation method, and reporting period are reasonably consistent.
A monthly result may be volatile when sales cycles are long or campaigns are launched in uneven bursts.
Use channel-level data separately when the goal is to evaluate a specific advertising source or campaign.
Assumptions & Important Notes
- All amounts are in US dollars for illustration; the same calculation works in another currency when every input uses that currency.
- Each example counts new customers rather than leads, trials, renewals, or existing-customer purchases.
- Sales and marketing costs are assumed to be eligible under the business's internal CAC methodology.
- The examples use a blended CAC and do not assign costs to individual channels.
Related Examples
Frequently Asked Questions
Can I use these examples for a startup?
Yes. Replace the example figures with your own included spending and new-customer count for the same reporting period.
Why does the annual example have a higher CAC than the quarterly example?
CAC depends on both total included spend and customers gained. Different businesses, periods, channels, and customer types can produce very different results.
Can CAC be less than marketing spend per customer?
Not when the same customer count is used and sales spend is nonnegative. Adding sales spend makes blended CAC equal to or higher than a marketing-only cost per customer.
Should I round CAC to whole dollars?
Whole-dollar rounding can be suitable for reporting, while cents may be useful for detailed analysis. Keep the rounding approach consistent.
Ready to calculate your own result?
Use the live calculator with your own inputs, timing, and preferences.