Standard costs and estimated costs are important concepts in managerial accounting because they help managers in planning, controlling operations, evaluating performance, and making business decisions. Both are related to future costs and are used as tools for cost management, but they differ in their purpose, basis of calculation, and application. Understanding the distinction between standard costs and estimated costs is essential for effective managerial decision-making. Standard cost refers to a predetermined cost that is established for a product, service, activity, or operation under specified conditions. It represents the cost that should normally be incurred when operations are carried out efficiently. Standard costs are generally developed by analysing technical specifications, past experience, expected levels of efficiency, market conditions, and operating requirements. They provide a benchmark against which actual costs can be compared. The difference between actual cost and standard cost is known as a variance, and management can analyse this variance to identify areas of efficiency or inefficiency. Standard costs are usually determined for different elements of cost, such as direct materials, direct labour, and overheads. For example, if a company determines that producing one unit of a product should require 5 kilograms of material at ₹100 per kilogram, the standard material cost per unit will be ₹500. Similarly, if two labour hours are considered necessary at ₹200 per hour, the standard labour cost will be ₹400. The total standard cost for these two elements will therefore be ₹900 per unit, excluding other costs. When actual costs are incurred, they can be compared with these standards. The establishment of standard costs normally involves setting standards for both quantity and price. Material standards specify the expected quantity of materials and their expected purchase price. Labour standards specify the expected amount of labour time and the appropriate wage rate. Overhead standards are developed on the basis of expected overhead expenditure and an appropriate activity level. These standards should be realistic and attainable under normal operating conditions. Standards that are excessively high may discourage employees, while standards that are too low may fail to encourage efficiency. One of the major purposes of standard costing is cost control. Management can compare actual performance with predetermined standards and investigate significant differences. For instance, if the actual material consumption is higher than the standard quantity, management can investigate whether the excess resulted from wastage, poor-quality materials, inefficient production methods, or inadequate supervision. Similarly, an unfavourable labour variance may indicate excessive overtime, low productivity, or inefficient use of labour. This enables managers to take corrective action. Standard costs also assist in budgeting and planning. Since standard costs provide predetermined cost information, they can be used in preparing production budgets, cost budgets, and profit plans. They are particularly useful in manufacturing organisations where