Normal profit is the minimum level of profit required to keep a business operating in the long run. It is the profit that covers all the costs of production, including the opportunity cost of the resources used, such as the owner's time and capital. Normal profit is the amount of profit that a business must earn to be at the same level of profitability as other businesses in the same industry. It is also known as the "break-even" point, where the revenue earned equals the total cost of production.