A budget is a plan for income and expenses over a defined period of time, expressed in monetary terms. It is prepared before the period begins. Budgeting provides benefits like control over money, awareness of finances, and early warnings about potential problems. Budgetary control involves implementing budgets and holding managers responsible. It establishes budgets for all organizational functions and continuously compares actual performance to the budget to identify variations and take corrective actions. The objectives of budgetary control include planning, coordination, communication, control, and performance evaluation.