Which of the following is a common example of a variable expense?

A common example of a variable expense is utilities. Variable expenses are costs that can fluctuate depending on usage and consumption patterns. Utilities are often considered variable because the bills can vary from month to month based on how much electricity, water, or gas is used. Factors such as seasonal changes—using more heating in winter or air conditioning in summer—can also affect these costs.

In contrast, rent is typically a fixed cost that remains constant for the duration of a lease agreement. Salary is also a fixed expense when it refers to regular employee compensation. Insurance premiums are generally consistent payments made periodically, which classify them as fixed expenses. Therefore, utilities stand out as variable expenses due to their fluctuating nature based on actual usage.