What do you mean by service Income? What does it constitute?

A service income is an income that is drawn by providing various professional services such as consulting, technical, or other services as part of a profession, trade, or business.

Usually the service income will not involve any component of product being manufactured or sold.

Some companies may have both the components like product sales as well as service income from consultation. For example a company selling laser cutting machines may also provide consultancy services.