Which of the following is a characteristic of fixed monthly expenses?

Fixed monthly expenses are characterized by their predictable nature, meaning they remain constant from month to month. This stability allows individuals and families to plan their budgets more effectively, as they can anticipate these expenses without worrying about sudden changes. Common examples of fixed monthly expenses include rent or mortgage payments, insurance premiums, and subscriptions that do not vary in cost.

The other options highlight aspects that are not inherent to fixed expenses. Fluctuating costs based on usage, long-term planning that might apply to variable expenses, and the mention of variable rates are all characteristics associated with different kinds of expenses, therefore distinguishing fixed expenses with their consistent amount each month is crucial for effective financial planning.