Unit economics is the analysis of revenue and costs associated with a single unit of a business model — typically one customer, one transaction, or one product. It determines whether the core business model is profitable at the individual level, independent of scale. Key metrics include LTV, CAC, contribution margin, and payback period.
In Depth
Unit economics answers the fundamental question: does the business make money on each customer it serves? A company can grow rapidly while losing money on every customer — a path to either eventual scale-driven profitability or inevitable failure. Unit economics reveals which outcome is more likely.
For subscription businesses, the primary unit economics framework centres on LTV:CAC. If LTV exceeds CAC, each customer creates value. The higher the ratio, the more value is created. The payback period — how many months of revenue are needed to recover CAC — determines how quickly value starts accruing.
For transactional businesses, unit economics focuses on contribution margin per transaction. A food delivery service, for example, analyses order economics: order value minus food cost, rider payment, packaging, and platform costs. If each order loses money at current prices and volumes, scale alone will not create profitability.
FP&A teams should build unit economics models early and update them regularly. Common pitfalls include: excluding all relevant costs (particularly people costs and overhead allocations), using blended averages that mask segment-level differences, and confusing marginal costs with fully loaded costs.
For UK businesses, unit economics must account for the full employment cost including employer NI (13.8%), auto-enrolment pension (minimum 3%), and any other benefits. These add 15-20% to headline salary, significantly affecting the cost side of unit economics calculations.
Real-World Example
A UK food delivery startup analyses unit economics per order. Average order value is £28. Restaurant commission: £4.20 (15%). Rider cost: £5.50. Packaging: £0.80. Payment processing: £0.42. Platform costs allocated per order: £2.10. Contribution margin is £14.98 per order (53.5%). With £600K monthly fixed costs and 50,000 monthly orders, the company needs contribution margin to cover fixed costs — currently generating £749K, making the model profitable at unit level.
Related Terms
Contribution margin is the amount remaining from revenue after deducting variable costs. It represen...
The break-even point is the level of sales at which total revenue exactly equals total costs, result...
Customer acquisition cost (CAC) is the total cost of acquiring a new customer, including all sales a...
Customer lifetime value (LTV or CLV) is the total revenue a company expects to earn from a customer ...
Cohort analysis groups customers by a shared characteristic — typically their acquisition month — an...
Stop wrestling with spreadsheets. Grove FP gives your finance team a purpose-built platform for budgeting, forecasting, and financial modelling — designed for UK businesses.
FAQ