Why marginal profit matters to a first-time founder
Marginal profit tests whether additional activity improves the result, rather than whether the business is profitable overall. It supports short-term pricing and capacity choices. The figure can turn negative when discounts, overtime, support or fulfilment costs rise with volume.
Examples of marginal profit
A workshop earns $3,000 of extra revenue from 100 additional units and incurs $2,200 of extra cost. Marginal profit over that range is $3,000 − $2,200 = $800, or $8 per added unit. Existing fixed overhead remains unchanged.
Common misunderstanding
It is not the same as profit margin or total profit. Marginal profit measures the change caused by extra activity. A sale can have positive marginal profit while the company still makes an overall loss because existing revenue does not cover fixed costs.
When to use it
Use it for an extra order, promotion, capacity increase or choice between sales channels. Define the relevant volume range and include all revenue and costs that change. Do not use a positive short-term result to ignore strategic, quality or capacity consequences.