Cost Accounting : Cost Terminology and Classification

What is a Cost?

A cost is a resource sacrificed to achieve a specific objective.

Examples:
  • Rent
  • Salaries
  • Materials
  • Utilities
Cost Objects

Anything for which cost information is desired.

Examples:
  • Product
  • Customer
  • Department
  • Project
Direct Costs

Can be traced directly to a cost object.

Examples:
  • Wood in furniture
  • Steel in vehicles
  • Direct labor
Characteristics
  • Easily traceable
  • Accurate assignment
Indirect Costs

Cannot be conveniently traced.

Examples:
  • Factory rent
  • Supervisor salaries
  • Factory insurance
Often called: Overhead Costs

Manufacturing Cost Categories

Direct Materials

Raw materials physically included in the final product.

Examples:
  • Flour in bread
  • Leather in shoes
Direct Labor

Employees directly involved in production.

Examples:
  • Assembly workers
  • Machine operators
Manufacturing Overhead

All manufacturing costs except direct materials and direct labor.

Examples:
  • Factory utilities
  • Maintenance
  • Depreciation
Prime Cost

Prime Cost = Direct Materials + Direct Labor

Example:

Materials = $20,000

Labor = $15,000

Prime Cost = $35,000

Conversion Cost

Conversion Cost = Direct Labor + Manufacturing Overhead

Example:

Labor = $15,000

Overhead = $10,000

Conversion Cost = $25,000

Product Costs vs Period Costs

Product Costs

Attached to inventory.

Include:
  • Direct materials
  • Direct labor
  • Manufacturing overhead
Period Costs

Expensed immediately.

Examples:
  • Advertising
  • Office salaries
  • Administrative expenses
Cost Classifications for Decision Making

Relevant Costs


Future costs that differ between alternatives.

Irrelevant Costs

Costs that remain unchanged.

Sunk Costs

Already incurred and cannot be recovered.

Example:

Money spent on market research.

Opportunity Cost

Benefit sacrificed by choosing one option over another.

Example:

Using a building for storage instead of renting it out.

Key Cost Formulas

Prime Cost

= Direct Materials + Direct Labor

Conversion Cost

= Direct Labor + Manufacturing Overhead

Note: Direct Materials + Direct Labor + Overhead = Product Cost

David Waithera

David Waithera is a Writer · Author . Ethics Thinker · Moral Storyteller.

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