Proprietor's income is a term used in economics to refer to the amount of income earned by a person or entity that owns and operates a business. This income is calculated as the net income of the business, which is the total revenue generated by the business minus all the expenses incurred in running the business. Proprietor's income can be earned in a variety of ways, such as through the sale of products or services, rental income, or investments.

In the economy, proprietor's income is an important measure of the profitability of small businesses or sole-proprietorships, which are the backbone of many economies worldwide. These businesses are often run by individuals, and their income is a key factor in determining their standard of living. Proprietor's income can also be a significant contributor to the overall economy, as it can provide employment opportunities, contribute to the tax base, and stimulate economic growth.

In the industry, proprietor's income is used to evaluate the financial performance of businesses. It is a key component of financial statements, including balance sheets, income statements, and cash flow statements. Business owners can use this income to reinvest in their business, pay off debts, or distribute earnings to shareholders. The profitability of a business can also impact its ability to access financing, attract investors, and expand operations.