Unit Economics

#concept #pricing #finance

Summary

The full-cost arithmetic beneath a price — what it actually costs to win, serve, and keep a customer, and what margin must remain. Founded by 2026-07-26-how-to-build-a-billion-dollar-company-2027 (oskar-hartmann), this page partially fills a gap the vault's own meta-analysis flagged from the start ("B2B unit economics — CAC/LTV — unfilled by the corpus"). Partial, because the source's principles are general and its examples consumer-grade; the B2B-services version is still missing. Status: tentative — single author (two sources since 2026-07-26: the Zavent post-pay trap and the CAC-burn restatement are the same voice, so consistency rather than corroboration).

Current Understanding

The central diagnosis: most entrepreneurs sell below the real cost. Not below the visible cost — below the full one. Systematically forgotten lines:

distribution and sales cost (the channel itself is a cost of goods — sales-channel-as-moat)
repeat acquisition and retention (winning the customer once is not winning them)
transport, amortization
inventory write-offs

The resulting "cash gaps" founders explain away as timing are, in Hartmann's telling, real losses that were priced in from the day the price was set. This is pricing-from-value's "sell dear" rule arrived at from the cost side rather than the value side — an independent tradition converging on the same instruction.

The sequence: (1) prove the product is needed; (2) prove you can produce it far below willingness-to-pay; (3) the spread must cover everything — marketing, distribution, sales, warehouse — with a buffer. Note the order: demand first, cost structure second, price last. Compare productized-service's validate-before-build rule — same discipline, one level deeper.

The buffer rule / best-year fallacy: never take your best year as the base. The best year is a once-a-decade anomaly; budget from it and every normal year reads as a crisis. Outside razor-thin retail, margin must carry a buffer.

LTV → CAC → moat: a business that has run its channel long enough to know lifetime value can pay up to ~⅓ of lifetime profit for a customer on day one (US credit-card customer ≈ $1,000 CAC; 1,000 customers = $1M — "it doesn't come cheaper"). That spending level is an entry barrier: competitors without the LTV statistics can't rationally match the bid. This is also the honest explanation of loss-making venture rounds — they fund negative unit economics until the LTV arrives (venture-fit).

Post-payment turns you into your customer's bank (2026-07-26-main-principle-of-successful-business, added 2026-07-26 — same author, second source). The Zavent anti-case: demand looked strong, but customers would only pay 3 months after delivery, so the company was silently financing its clients — a working-capital cost that belongs on the forgotten-lines list above. When prepayment was required, conversion collapsed, revealing the real demand level. Twin lessons: prepayment willingness is itself a unit-economics variable (it decides whose balance sheet carries the build — sell-before-build), and payment timing is part of the full cost of a sale.

The CAC-burn barrier, restated (same source): once PMF is proven and unit economics are positive, deliberately spend heavily per customer ($80–100 CAC in his example) so no newcomer can afford to enter. Consistent with the ⅓-of-LTV rule from his first source — framework stability for this author, not corroboration.

Pricing power as the PMF test (recorded in full on pricing-from-value): if raising prices doesn't shrink the customer flow, you have PMF; if a marketplace sets your price, "you're in a simulation of entrepreneurship." Unit economics you don't control aren't yours.

Evidence

Full-cost list, cash-gaps-are-losses, the three-step sequence, buffer/best-year rule, LTV×⅓ CAC, $1,000 credit-card CAC, entry-barrier logic — 2026-07-26-how-to-build-a-billion-dollar-company-2027
Zavent post-payment trap ("a bank financing its clients"); $80–100 CAC-burn barrier restated — 2026-07-26-main-principle-of-successful-business (same author — consistency, not corroboration)
Convergent from the value side: price must fund the work that makes the service good ("below ~$100/mo there's no margin…") — 2026-07-17-design-the-perfect-offer, pricing-from-value
Convergent: Solution-model margin 30–50% vs staff-aug rate race — solution-vs-staff-augmentation
The gap this partially fills — flagged in 2026-06-15-meta-analysis-selling-dev-in-ai-era

pricing-from-value — the value side of the same price; pricing power lives there
sales-channel-as-moat — the channel whose cost and payback this math governs
venture-fit — negative unit economics as a deliberate, funded phase
productized-service — validate-before-build is step 1 of the sequence here
marketing-system — "money in → more money out" is a unit-economics statement
overview

Contradictions / Uncertainty

Status: tentative — one source; every number ($1,000 CAC, ⅓-of-LTV) is a stage figure without citation.
The examples are consumer/product; the vault's domain is B2B services. Services LTV is lumpy (projects, retainers), churn behaves differently, and "repeat acquisition cost" may be the referrals/partnerships machinery rather than ad spend. The transfer is plausible but unshown — the flagged B2B gap is narrowed, not closed.
Tension with the vault's spend-nothing school: Martell's $0 blueprint says spend nothing until customers pay (sales-discipline); Hartmann describes rationally spending $1,000 to acquire one customer. Reconcilable as stages (pre-LTV-knowledge vs post-), but that seam is exactly what neither source specifies.

Next Questions

What are CAC and LTV for a niched dev-services operator, concretely — and does the ⅓ rule mean anything when LTV is 2–3 projects?
Where is the line between a venture-fundable negative-unit-economics phase and Fab.com-style self-deception (venture-fit)?
Which of the forgotten cost lines apply to services (repeat acquisition, surely; write-offs — as unbilled rework?)?

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