What is cost structure?
Cost structure is the composition and proportion of fixed and variable costs that a business incurs to deliver its product or service. It is one of the nine blocks in Osterwalder’s Business Model Canvas and a key determinant of operating leverage, break-even economics and resilience under demand stress.
Two strategic archetypes
- Cost-driven structure: the business competes on price; the operating model is optimised for low cost (automation, scale, low-cost geographies). Low-cost airlines, discount retailers.
- Value-driven structure: the business competes on differentiation; cost is secondary to premium positioning and quality. Luxury brands, specialised B2B SaaS.
Most companies sit between the two; the strategic question is which axis the business is built around.
Anatomy of cost structure
- Fixed vs. variable mix: high fixed share creates high operating leverage but low resilience to demand drops.
- Direct vs. indirect: direct costs trace to a product or customer; indirect costs (G&A) support the business as a whole.
- Cash vs. non-cash: cash costs hit liquidity now; non-cash (depreciation, share-based comp) hit reported profit but not cash.
- Economies of scale: declining per-unit cost as volume grows.
- Economies of scope: declining per-unit cost as the business adds related products on the same infrastructure.
Why the structure matters in SaaS
SaaS combines low marginal cost (variable) with heavy fixed engineering and infrastructure cost. The resulting operating leverage is dramatic: revenue scales near-linearly while cost scales sub-linearly. This is why mature SaaS reaches 30%+ operating margins, but also why pre-fit SaaS burns cash heavily. Cost-structure design is product-strategy design.
Do: map every cost line as fixed or variable, direct or indirect; review quarterly to spot creep in fixed-cost share.
Don’t: ignore cost-structure evolution as the business scales — premature additions to fixed cost lock in burn before economics are proven.