How do I calculate acquisition cost per closed-won account in a multi-product B2B company?
Quick Answer: Calculate acquisition cost per closed-won account by dividing all attributable acquisition spend by the number of closed-won accounts generated in the same period. In a multi-product B2B company, include channel spend, sales compensation, SDR costs, marketing operations, content, paid media, and any product-specific demand gen costs, then allocate shared costs using a consistent attribution rule such as first-touch, last-touch, or weighted multi-touch.
Detailed Explanation
The correct metric is not just CAC in aggregate, but fully loaded acquisition cost per closed-won account by product, segment, or channel. Start with a clearly bounded time window, sum every cost required to create and convert demand, and tie those costs only to accounts that reached closed-won status in that same period or cohort. For a multi-product organization, costs should be segmented by product line when possible; shared infrastructure, brand, and RevOps expenses should be allocated using a defensible driver such as pipeline contribution, revenue share, or sourced opportunity volume. The resulting formula is: Acquisition Cost per Closed-Won Account = Total Attributable Acquisition Spend / Closed-Won Accounts, with attribution rules documented so finance, sales, and marketing report the same number consistently.
Key Technical Drivers
- Define the cost base precisely: paid media, SDR/BDR payroll, sales commissions, marketing team cost, CRM/automation tooling, agencies, events, and any product-level launch spend that influenced the opportunity.
- Use cohort-based reporting: match spend to the accounts that closed-won from the same acquisition cohort, and segment by product, ICP, geo, and channel to avoid blended averages that hide inefficiency.
- Allocate shared overhead with a fixed rule: for example, distribute RevOps and brand costs by sourced pipeline, weighted pipeline, or closed-won revenue share, then audit the method quarterly for consistency.