manufacturing costs

Picture building a wooden chair from scratch. Three very different kinds of money go into it: the wood and screws you can point at and say 'that's in the chair'; the wages of the carpenter whose hands shaped this chair; and a fuzzier pile — the factory's rent, the glue used a dab at a time, the supervisor's pay, the electricity for the saws — that helped make the chair but cannot be tied to it cleanly. Together these three are the manufacturing costs.

Precisely, for a manufacturer the cost of making products is split into three classic buckets. Direct materials are the raw materials that physically become part of the product and can be traced to it (the wood and screws). Direct labor is the wages of workers who physically build the product and whose time can be traced to it (the carpenter's hours). Manufacturing overhead is every other factory cost — indirect materials, indirect labor, factory rent, depreciation, utilities, insurance — that supports production but cannot be traced to a single unit, so it is allocated. For example, a chair might carry 12 of materials, 8 of direct labor, and 5 of allocated overhead, for a total manufacturing cost of 25.

This matters because manufacturing costs are exactly the costs that become 'product costs' — they attach to inventory and are expensed as cost of goods sold only when the goods sell, unlike selling and admin (period) costs that are expensed at once. They are the building blocks of the schedule of cost of goods manufactured and of every costing system. A key subtlety: 'direct labor' counts only the hands actually building the product; the factory janitor and supervisor, though essential, fall into overhead because their time cannot be traced to one unit.