A monthly budget is a financial plan that outlines expected income and allocates it toward expenses, savings, and goals for a single calendar month. It serves as a roadmap for spending decisions and helps ensure that money is being directed intentionally rather than disappearing without a clear accounting. Most personal finance experts recommend using a monthly budget as the core financial management tool, since most bills, income cycles, and financial habits operate on a monthly basis. A budget is most effective when reviewed and adjusted at the end of each month based on actual spending.