- Enter a realistic value for Sales spend and complete the remaining required fields.
- Check that Marketing spend uses the period and unit shown beside the input.
- Review the headline estimate together with the detailed figures; no single output should be interpreted in isolation.
- Change one assumption at a time to understand which variable has the greatest effect.
CAC Calculator
Use this cac calculator to turn cac assumptions into a clear, comparable estimate. Adjust the inputs to test practical scenarios and review the supporting figures before making a decision.
Enter your assumptions
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Result
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Enter your SaaS metrics to calculate the result.
Enter values to calculate.
The interpretation will update with your result.
Total spend—
CAC payback—
New MRR added—
New MRR / spend—
CAC = sales and marketing spend ÷ new customers acquired
The calculator applies this relationship consistently to the values entered above.
What the result means
The headline figure summarizes the modeled cac outcome under the current assumptions. The supporting rows separate important components so you can check whether the result is operationally or financially plausible.
Treat this as a planning estimate. Actual cac outcomes can differ because of timing, fees, taxes, rounding, eligibility rules, market conditions, or data quality that the simplified model does not capture.
Begin with the prefilled scenario: Sales spend = 12000; Marketing spend = 18000; New customers = 120; Gross margin = 80. Record the result, then change Sales spend while holding the other inputs constant.
The difference between the two outputs shows the sensitivity of cac to that assumption. Repeat with Marketing spend for a second comparison.
What does the CAC Calculator show?
It converts the entered Sales spend, Marketing spend, New customers, Gross margin assumptions into an indicative cac result and a supporting breakdown.
How should I choose a value for Sales spend?
Use a current, documented figure when available. For forecasts, test a conservative case alongside your expected value rather than relying on a single assumption.
Why does Marketing spend materially change the estimate?
Marketing spend is part of the model's scale or rate relationship. Even a modest adjustment can compound or flow through several displayed figures.
Can I use the result as a final decision?
No. Use it to screen scenarios and identify trade-offs, then confirm material sales, marketing & audience decisions with source records and qualified advice where appropriate.