A personal or household budget is an itemized list of expected income and expenses that helps you to plan for how your money will be spent or saved as well as track your actual spending habits. Though the word budget has taken on a more negative connotation over the years invoking an image of pinching pennies or limited spending, a budget is really just a tool_and a great tool at that_to gain better and more accurate insight into your spending habits.
If you carry a credit card balance, the minimum payment is a "need" and it counts toward the 50 percent. Anything extra is an additional debt repayment, which goes toward this 20 percent category. If you carry a mortgage or a car loan, the minimum payment is a "need" and any extra payments count toward "savings and debt repayment."