Rental income is the income that a property owner receives from renting out their property. This can include income from residential properties, such as apartments or houses, as well as income from commercial properties, such as office buildings or retail spaces. Rental income is typically derived from the rent that tenants pay, and can be a significant source of income for property owners. In some cases, property owners may also be able to generate additional income from their rental properties through other means, such as through the appreciation of the property's value or through the provision of services to tenants. Rental income is subject to tax, and property owners may be required to report their rental income on their tax returns.