Customer payback period

Choose an explicit period and enter contribution per period and CAC. The result is a number of periods, not a calendar date.

Advertising spend divided by customers.
Contribution profit per customer.
Period used for the target.

Worked example

This example uses the same calculation as the form. Enter your values and select “Calculate” to see your result.

Example inputs

Example result

Formulas and units

Values are rounded for display only; enter percentages on a 0–100 scale. See the methodology.

Formula version: 1.0

Checked 2026-09-26.