# Marginal profit

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In [microeconomics](/source/Microeconomics), **marginal profit** is the increment to [profit](/source/Profit_(economics)) resulting from a unit or infinitesimal increment to the quantity of a product produced. Under the [marginal approach to profit maximization](/source/Profit_maximization#Marginal_revenue–marginal_cost_perspective), to maximize profits, a firm should continue to produce a good or service up to the point where marginal profit is zero. At any lesser quantity of output, marginal profit is positive and so profit can be increased by producing a greater amount; likewise, at any quantity of output greater than the one at which marginal profit equals zero, marginal profit is negative and so profit could be made higher by producing less.

Since profit is [revenue](/source/Revenue) minus [cost](/source/Economic_cost), marginal profit equals [marginal revenue](/source/Marginal_revenue) minus [marginal cost](/source/Marginal_cost).[1]

## References

1. Hall, Mary (January 10, 2022). ["Marginal Revenue and Marginal Cost of Production"](https://www.investopedia.com/ask/answers/041315/how-marginal-revenue-related-marginal-cost-production.asp). *Investopedia*. DotDash. Retrieved February 9, 2022.

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