There are many reasons that you may be failing at budgeting but the number one reason that people fail in their budgeting efforts is that they are too hard on themselves. Many people treat budgets like a static object. Thinking that once the budget has been built, they are done. But by the sixth-week things start to crumble. This happens because no two months are the same. Each month comes with its own unique expenses due to holidays, family obligations, travel, etc.