Unit Economics
DEFINITION
The revenue and cost of a single customer or transaction, used to prove the business model works before scaling.
In depth
A SaaS has healthy unit economics when LTV > 3× CAC, payback is under 12 months, and gross margin is above 70%. Until all three are true, scaling spend burns cash without building value.
The cleanest way to show unit economics is a one-customer table: ARPU, gross margin $, CAC, payback months, LTV, LTV/CAC. Any investor conversation starts here.
Put it into practice
Related terms
LTV/CAC Ratio
The ratio of Customer Lifetime Value to Customer Acquisition Cost — the single most important signal of SaaS profitability.
Payback Period
The number of months required to recover the cost of acquiring a customer through that customer's gross profit.
Gross Margin
The percentage of revenue left after deducting the direct cost of delivering the service (hosting, support, payment fees).
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Last reviewed 14 April 2026 by Abhi Verma.