Which of the following refers to money left over after all expenses have been deducted from income?

The term that refers to the money left over after all expenses have been deducted from income is discretionary income. This is the amount of income that a household has available for spending after all essential expenses, such as bills and necessary purchases, have been accounted for. It is an important measure as it indicates financial flexibility and the potential for savings or spending on non-essential goods and services.

Discretionary income is distinct from other terms; for instance, gross income is the total earnings before any deductions, and disposable income is what remains after taxes have been deducted but does not account for essential living expenses. Total revenue refers to the total income generated by the sale of goods or services. Thus, discretionary income specifically highlights the funds available for optional spending, making it the correct choice.