What is a common mistake made in budgeting?

A common mistake made in budgeting is underestimating expenses, leading to unrealistic financial projections. Many individuals fail to account for irregular or unexpected costs, such as medical emergencies or car repairs, which can derail their budget. Additionally, people often overlook small, recurring expenses that can add up over time. This can result in overspending and financial stress, making it crucial to create a comprehensive and realistic budget.