# CAC Payback by Segment and Cash Conversion Score

> CAC payback targets depend on segment: under 12 months in SMB, under 18 in mid-market, under 24 in enterprise. The cash conversion score, ARR divided by total capital raised, additionally measures the capital efficiency of the whole company.

- Canonical URL: https://www.convios.com/en/methods/cac-payback-by-segment
- Language version: https://www.convios.com/de/methodik/cac-payback-segment
- Status: Externally proven
- Method library: https://www.convios.com/en/methods — Markdown: https://www.convios.com/en/methods.md

## Problem

You measure an aggregate CAC payback and do not know whether it is good or bad. Without segment context the number is barely interpretable: an enterprise business may pay back more slowly than a self-service one. The level above is often missing too: how efficiently does the company as a whole turn raised capital into recurring revenue?

## Approach

1. Calculate CAC payback separately per segment (SMB, mid-market, enterprise) on a gross-margin basis.
2. Compare against the segment thresholds: under 12, 18 and 24 months respectively.
3. Calculate the cash conversion score: current ARR divided by total capital raised (net of cash).
4. Classify the score: 0.25 to 0.5 solid, 0.5 to 1.0 good, above 1.0 outstanding.
5. Use both levels together: segment payback steers the motion, the score disciplines capital allocation.

## Example

A typical case: a vendor serves small customers via self-service and large accounts via field sales but reports only a blended payback. The blended figure looks unremarkable yet hides that the SMB segment badly misses its threshold while enterprise is healthy. After separating the segments, SMB onboarding is automated and sales effort there reduced. In parallel, the cash conversion score shows investors that the company converts raised capital into ARR with above-average efficiency.

## Limits

The thresholds are benchmark conventions from a VC-shaped environment, not a guarantee of a healthy business. The cash conversion score structurally penalizes capital-intensive models and speaks only to past efficiency, not the future. Small segments produce volatile paybacks; trend over single values.

## Metric

CAC payback in months per segment against the 12/18/24 thresholds, plus the cash conversion score as a capital-efficiency measure.

## Sources

- Gordon, Myron J.: The Payoff Period and the Rate of Profit. The Journal of Business 28(4), 1955, S. 253–260, 1955 · academic and scholarly literature · supports the underlying mechanism. The reciprocal of the payoff period estimates a proposal's rate of profit, most accurately when the proposal's life exceeds its after-tax payoff period, the reason a recovery period works as a measure of return at all. (https://doi.org/10.1086/294083)
- Scaling to $100 Million, Bessemer Venture Partners (BVP Atlas) — Bessemer Venture Partners, BVP Atlas, n.d. · investment, consulting and analyst firms, industry bodies and public agencies · provides benchmark figures. States the segment-dependent targets verbatim: under twelve months for small customers, under eighteen in mid-market, under twenty-four in enterprise. (https://www.bvp.com/atlas/scaling-to-100-million)
- Cash Conversion Score, Bessemer Venture Partners (BVP Atlas) — Bessemer Venture Partners, BVP Atlas, n.d. · investment, consulting and analyst firms, industry bodies and public agencies · describes the method. Defines the capital efficiency metric as annual recurring revenue divided by equity and debt raised less cash on hand, with bands of 0.25 to 0.5, 0.5 to 1.0 and above 1.0. The bands are Bessemer's own convention, not an industry-wide measured distribution. (https://www.bvp.com/atlas/cash-conversion-score)
- Navigating Unpredictability: Introducing the Resiliency Rubric for SaaS Companies (2023), ICONIQ Growth — ICONIQ Growth, 2023 · investment, consulting and analyst firms, industry bodies and public agencies · provides benchmark figures. Runs CAC payback as one of five diagnostics and calculates it explicitly on a gross-margin basis, sales and marketing expenses in the period divided by gross new customers times ARPU, multiplied by gross margin. Under twelve months counts as exceptional. It does not break the figure down by customer segment; for the current environment it reports 20 to 30 months. (https://www.iconiq.com/growth/insights/iconiq-growth-resiliency-rubric-2023)
- Weingartner, H. Martin: Some New Views on the Payback Period and Capital Budgeting Decisions. Management Science 15(12), 1969, S. B594–B607, 1969 · academic and scholarly literature · supports the underlying mechanism. Analyses payback both as an investment criterion and as a liquidity constraint, and as a device for handling uncertainty about project life, which is what justifies differentiated allowable periods across segments. (https://doi.org/10.1287/mnsc.15.12.B594)
- Dwyer, F. Robert: Customer Lifetime Valuation to Support Marketing Decision Making. Journal of Direct Marketing 3(4), 1989, S. 8–15, 1989 · academic and scholarly literature · supports the underlying mechanism. Establishes lifetime value as the basis for budgeting customer acquisition programmes and separates estimation approaches by relationship type (retention vs. migration). (https://doi.org/10.1002/dir.4000030404)
- Primary source: Gordon, Myron J.: The Payoff Period and the Rate of Profit. The Journal of Business 28(4), 1955, S. 253–260 (https://doi.org/10.1086/294083)

## Related

- Method: [LTV:CAC and CAC Payback](https://www.convios.com/en/methods/ltv-cac-payback)
- Method: [Magic Number](https://www.convios.com/en/methods/magic-number)
- Method: [Quick Ratio](https://www.convios.com/en/methods/quick-ratio)