Finance & business
Customer acquisition cost (CAC) calculator
Calculate average CAC and the payback period for customer acquisition spend. Free, local calculation with no account required.
Assumptions
Measure the average cost of acquiring a new customer and estimate payback from monthly gross profit per customer.
Ready to calculate
Adjust the assumptions, then run the calculation.
CAC = (marketing spend + sales spend) ÷ new customers acquired.
Management metric only: interpret the result using your accounting methods, business model, and reference period.
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How does this tool work?
Measure the average cost of acquiring a new customer and estimate payback from monthly gross profit per customer. The tool runs locally in your browser and makes it easy to compare several assumptions.
The calculator applies the formula shown in the interface to the values and rates you enter. For customer acquisition cost, keep units and periods consistent: for example, do not mix monthly spend with an annual customer count. Results are management indicators rather than universal accounting standards.
How to use this tool
Use a consistent period
Prepare amounts and volumes for the same reference period.
Enter the assumptions
Fill in the requested data and replace the example values with figures from your business.
Analyze the result
Compare the metric over time or across scenarios instead of interpreting it in isolation.
Use cases
Periodic monitoring
Track customer acquisition cost on a consistent monthly, quarterly, or annual basis.
Scenario comparison
Change one assumption and immediately see its impact on the metric.
Dashboard preparation
Use the result as a quick check before consolidating figures in your reporting.
Tips and best practices
- Keep the same calculation method from one period to the next so comparisons remain meaningful.
- Document what is included or excluded from each amount, especially sales spend and operating costs.
- Always complement this metric with other margin, cash, growth, or revenue-quality indicators.
Frequently asked questions
Is this metric an accounting standard?
No. It is a management metric whose definition can vary across companies, industries, and reporting methods.
Can I compare two companies directly?
Only when their periods, scopes, and calculation methods are genuinely comparable. Otherwise the difference may reflect methodology rather than performance.
Why are the default values only examples?
Cost structures, margins, operating cycles, and business models vary widely. Always replace defaults with your own data.
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