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Finance and accounting

Marginal cost

The extra cost of making one more unit.

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What does Marginal cost mean?

Marginal cost is the cost of producing one more unit. With spare capacity it is roughly the variable cost; when capacity is full it can jump, because one more unit may need overtime or a new machine. Pricing decisions for extra orders should compare price with marginal cost, not with average cost.

Where does it come up in case interview prep?