F · Unit economicsExternally proven

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.

When you need this method

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

Typical application

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 and counter-indications

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.

How to measure impact

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

Related methods

Sources

  1. 1.Scaling to $100 Million, Bessemer Venture Partners (BVP Atlas) (opens in a new tab) · Bessemer Venture Partners · BVP Atlas, o. J. · investment, consulting or analyst firmNennt die segmentabhängigen Zielwerte wörtlich: unter zwölf Monaten bei kleinen Kunden, unter achtzehn im Mittelstandsgeschäft, unter vierundzwanzig im Großkundengeschäft.
  2. 2.Cash Conversion Score, Bessemer Venture Partners (BVP Atlas) (opens in a new tab) · Bessemer Venture Partners · BVP Atlas, o. J. · investment, consulting or analyst firmDefiniert die Kapitaleffizienz-Kennzahl als wiederkehrenden Jahresumsatz geteilt durch das aufgenommene Eigen- und Fremdkapital abzüglich vorhandener Liquidität, mit Bändern 0,25 bis 0,5, 0,5 bis 1,0 und über 1,0.
  3. 3.The 2024 ICONIQ Growth Resiliency Rubric, ICONIQ Growth (opens in a new tab) · ICONIQ Growth · 2024 · investment, consulting or analyst firmRechnet die Rückzahlungsdauer ausdrücklich auf Bruttomarge und stuft zwölf bis achtzehn Monate als herausragend ein, was die segmentierten Bessemer-Zielwerte unabhängig bestätigt.

Origin: Bessemer

Last reviewed: 2026-07-25 by Dr. Oliver Gausmann

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