Fixed costs remain constant regardless of how much a business produces or sells; variable costs rise and fall directly with activity, and the mix between them shapes how profitability behaves at every revenue level.

Rent, insurance, and salaried staff are fixed. They do not change when a business wins a new client or loses one. Materials, commissions, and hourly labour are variable. They scale with output. Most businesses have a mix of both, and understanding where each major cost sits on that spectrum is essential for pricing, capacity planning, and financial stress-testing.

The leverage embedded in a high-fixed-cost structure cuts both ways. When revenue grows, each additional dollar drops to the bottom line at a high rate because fixed costs are already covered. When revenue contracts, those same fixed costs remain, creating losses that variable cost structures would absorb more gracefully. Knowing cost structure is knowing how a business will behave under pressure before the pressure arrives.

The fixed-variable composition of a cost base determines how resilient margins are to revenue changes. See how Wefinx approaches Virtual CFO services.

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