Unit Economics For Founders

The revenue and costs directly attributable to a single unit of value (e.g., one customer, one transaction, one subscription month) used to assess per-unit profitability.

Because spending on acquisition before proving a unit is profitable at scale mathematically guarantees greater losses; growth amplifies whatever margin profile already exists.

Any repeatable, countable value-creating entity: a paying customer, a delivered order, an active subscriber per month, or a contract.

The fully-loaded cost to acquire one new paying customer, including ad spend, sales salaries, tools, and creative, divided by new customers in the period.

The total gross profit a customer is expected to generate over the entire future relationship with the company.

LTV divided by CAC; the canonical measure of per-unit return on acquisition spend. Healthy SaaS startups target ≥ 3:1.

Below 1:1 means each customer loses money; 1–2:1 is fragile and below investor expectations for venture-scale software.

3:1 — the standard benchmark for healthy SaaS unit economics.

The number of months of gross profit from a new customer required to recover the CAC spent to acquire them.

Under 12 months; best-in-class B2B SaaS achieves under 12, often cited as < 18 months as acceptable.

(Revenue − COGS) ÷ Revenue, where COGS includes hosting, payment processing, support, and direct delivery costs.

Because all per-unit operating costs (R&D, G&A, S&M) must be paid from gross profit; low margin means scale cannot reach profitability.