Cost Accounting Definitions with Examples - Complete Reference Guide
A. FUNDAMENTAL COST CONCEPTS
1. Cost
Definition: A resource sacrificed or given up to achieve a specific objective, measured in
monetary terms.
Example: ABC Manufacturing spends $50,000 on steel to produce cars. The steel represents a
cost because the company gave up $50,000 (resource) to obtain materials needed for car
production (specific objective).
Real-world Application: When McDonald's purchases potatoes for $10,000, this is a cost
because they sacrifice cash to obtain the raw material needed for french fries.
2. Cost Object
Definition: Anything for which a separate measurement of costs is desired, such as a product,
service, project, or department.
Example:
Product Cost Object: Toyota Camry - all costs related to manufacturing Camrys
Department Cost Object: Marketing Department - all costs incurred by marketing
Project Cost Object: New Factory Construction - all costs for building the facility
Real-world Application: Apple treats the iPhone as a cost object, tracking all materials, labor,
and overhead costs specifically related to iPhone production.
3. Direct Costs
Definition: Costs that can be easily and conveniently traced to a specific cost object in an
economically feasible manner.
Example:
Direct Material: Steel used in car manufacturing can be directly traced to each car
Direct Labor: Assembly worker's time spent building a specific product
Direct Expenses: Special equipment rental for a particular project
,Real-world Application: At Coca-Cola, the syrup concentrate used in each bottle of Coke is a
direct cost because it can be directly traced to each bottle produced.
4. Indirect Costs
Definition: Costs that cannot be easily and conveniently traced to a specific cost object and
must be allocated using some allocation method.
Example:
Factory Rent: Benefits all products manufactured, cannot be traced to one specific
product
Supervisor Salary: Supervises multiple products, cannot be directly assigned to one
Factory Insurance: Covers entire facility and all products
Real-world Application: At General Motors, the factory manager's salary is an indirect cost
because the manager oversees production of multiple car models, and their time cannot be
easily traced to specific models.
5. Fixed Costs
Definition: Costs that remain constant in total regardless of changes in the activity level within a
relevant range and time period.
Example:
Monthly Rent: $10,000 per month whether you produce 1,000 or 5,000 units
Insurance Premium: $2,000 quarterly regardless of production volume
Manager Salary: $8,000 monthly regardless of units produced
Calculation Example:
Production Level: 1,000 units → Total Fixed Cost: $20,000 → Per Unit: $20
Production Level: 2,000 units → Total Fixed Cost: $20,000 → Per Unit: $10
Real-world Application: Netflix pays $500,000 monthly rent for its headquarters whether they
add 100,000 or 1 million new subscribers that month.
,6. Variable Costs
Definition: Costs that change in total proportionally with changes in activity level.
Example:
Raw Materials: $5 of plastic per toy produced
Sales Commissions: 5% of each sale
Packaging: $2 per unit shipped
Calculation Example:
Production Level: 1,000 units → Variable Cost per unit: $15 → Total Variable Cost:
$15,000
Production Level: 3,000 units → Variable Cost per unit: $15 → Total Variable Cost:
$45,000
Real-world Application: Uber's cost for gasoline varies directly with the number of rides
provided - more rides mean more gas consumption and higher total costs.
7. Mixed Costs (Semi-Variable)
Definition: Costs that contain both fixed and variable components.
Example: Electricity Bill: $500 fixed monthly charge + $0.10 per kilowatt-hour used
At 2,000 kWh: $500 + (2,000 × $0.10) = $700
At 5,000 kWh: $500 + (5,000 × $0.10) = $1,000
Telephone Bill: $100 basic monthly service + $0.05 per minute for calls over 1,000 minutes
Real-world Application: A cell phone plan with $50 monthly base fee plus $0.10 per text
message over 1,000 texts.
B. INVENTORY ACCOUNTS
8. Raw Materials Inventory
Definition: Account that contains the cost of materials purchased but not yet issued to
production.
Example:
Purchased: 10,000 pounds of steel at $2 per pound = $20,000 in Raw Materials
Inventory
, Issued to production: 6,000 pounds = $12,000 transferred to Work-in-Process
Remaining: 4,000 pounds = $8,000 stays in Raw Materials Inventory
Real-world Application: Ford's Raw Materials Inventory includes steel, rubber, plastic, and
electronic components waiting to be used in vehicle assembly.
9. Work-in-Process Inventory
Definition: Account containing costs of products that are partially completed but not yet
finished.
Example: A furniture company has chairs in various stages:
100 chairs: Wood cut, not assembled = $5,000
50 chairs: Assembled, not painted = $8,000
25 chairs: Painted, not upholstered = $6,000
Total Work-in-Process: $19,000
Real-world Application: Boeing's Work-in-Process includes partially assembled aircraft at
different completion stages - some have engines installed, others are awaiting interior fitting.
10. Finished Goods Inventory
Definition: Account containing the total cost of completed products that are ready for sale.
Example: Electronics manufacturer completes production:
500 smartphones at total cost of $200 each = $100,000 in Finished Goods
When 300 units are sold, $60,000 moves from Finished Goods to Cost of Goods Sold
Remaining: 200 units = $40,000 in Finished Goods
Real-world Application: Apple's Finished Goods Inventory includes completed iPhones, iPads,
and MacBooks in warehouses ready for shipment to retailers.
C. COSTING SYSTEMS
11. Job Order Costing
Definition: A costing system where costs are accumulated separately for each job or batch of
products.
A. FUNDAMENTAL COST CONCEPTS
1. Cost
Definition: A resource sacrificed or given up to achieve a specific objective, measured in
monetary terms.
Example: ABC Manufacturing spends $50,000 on steel to produce cars. The steel represents a
cost because the company gave up $50,000 (resource) to obtain materials needed for car
production (specific objective).
Real-world Application: When McDonald's purchases potatoes for $10,000, this is a cost
because they sacrifice cash to obtain the raw material needed for french fries.
2. Cost Object
Definition: Anything for which a separate measurement of costs is desired, such as a product,
service, project, or department.
Example:
Product Cost Object: Toyota Camry - all costs related to manufacturing Camrys
Department Cost Object: Marketing Department - all costs incurred by marketing
Project Cost Object: New Factory Construction - all costs for building the facility
Real-world Application: Apple treats the iPhone as a cost object, tracking all materials, labor,
and overhead costs specifically related to iPhone production.
3. Direct Costs
Definition: Costs that can be easily and conveniently traced to a specific cost object in an
economically feasible manner.
Example:
Direct Material: Steel used in car manufacturing can be directly traced to each car
Direct Labor: Assembly worker's time spent building a specific product
Direct Expenses: Special equipment rental for a particular project
,Real-world Application: At Coca-Cola, the syrup concentrate used in each bottle of Coke is a
direct cost because it can be directly traced to each bottle produced.
4. Indirect Costs
Definition: Costs that cannot be easily and conveniently traced to a specific cost object and
must be allocated using some allocation method.
Example:
Factory Rent: Benefits all products manufactured, cannot be traced to one specific
product
Supervisor Salary: Supervises multiple products, cannot be directly assigned to one
Factory Insurance: Covers entire facility and all products
Real-world Application: At General Motors, the factory manager's salary is an indirect cost
because the manager oversees production of multiple car models, and their time cannot be
easily traced to specific models.
5. Fixed Costs
Definition: Costs that remain constant in total regardless of changes in the activity level within a
relevant range and time period.
Example:
Monthly Rent: $10,000 per month whether you produce 1,000 or 5,000 units
Insurance Premium: $2,000 quarterly regardless of production volume
Manager Salary: $8,000 monthly regardless of units produced
Calculation Example:
Production Level: 1,000 units → Total Fixed Cost: $20,000 → Per Unit: $20
Production Level: 2,000 units → Total Fixed Cost: $20,000 → Per Unit: $10
Real-world Application: Netflix pays $500,000 monthly rent for its headquarters whether they
add 100,000 or 1 million new subscribers that month.
,6. Variable Costs
Definition: Costs that change in total proportionally with changes in activity level.
Example:
Raw Materials: $5 of plastic per toy produced
Sales Commissions: 5% of each sale
Packaging: $2 per unit shipped
Calculation Example:
Production Level: 1,000 units → Variable Cost per unit: $15 → Total Variable Cost:
$15,000
Production Level: 3,000 units → Variable Cost per unit: $15 → Total Variable Cost:
$45,000
Real-world Application: Uber's cost for gasoline varies directly with the number of rides
provided - more rides mean more gas consumption and higher total costs.
7. Mixed Costs (Semi-Variable)
Definition: Costs that contain both fixed and variable components.
Example: Electricity Bill: $500 fixed monthly charge + $0.10 per kilowatt-hour used
At 2,000 kWh: $500 + (2,000 × $0.10) = $700
At 5,000 kWh: $500 + (5,000 × $0.10) = $1,000
Telephone Bill: $100 basic monthly service + $0.05 per minute for calls over 1,000 minutes
Real-world Application: A cell phone plan with $50 monthly base fee plus $0.10 per text
message over 1,000 texts.
B. INVENTORY ACCOUNTS
8. Raw Materials Inventory
Definition: Account that contains the cost of materials purchased but not yet issued to
production.
Example:
Purchased: 10,000 pounds of steel at $2 per pound = $20,000 in Raw Materials
Inventory
, Issued to production: 6,000 pounds = $12,000 transferred to Work-in-Process
Remaining: 4,000 pounds = $8,000 stays in Raw Materials Inventory
Real-world Application: Ford's Raw Materials Inventory includes steel, rubber, plastic, and
electronic components waiting to be used in vehicle assembly.
9. Work-in-Process Inventory
Definition: Account containing costs of products that are partially completed but not yet
finished.
Example: A furniture company has chairs in various stages:
100 chairs: Wood cut, not assembled = $5,000
50 chairs: Assembled, not painted = $8,000
25 chairs: Painted, not upholstered = $6,000
Total Work-in-Process: $19,000
Real-world Application: Boeing's Work-in-Process includes partially assembled aircraft at
different completion stages - some have engines installed, others are awaiting interior fitting.
10. Finished Goods Inventory
Definition: Account containing the total cost of completed products that are ready for sale.
Example: Electronics manufacturer completes production:
500 smartphones at total cost of $200 each = $100,000 in Finished Goods
When 300 units are sold, $60,000 moves from Finished Goods to Cost of Goods Sold
Remaining: 200 units = $40,000 in Finished Goods
Real-world Application: Apple's Finished Goods Inventory includes completed iPhones, iPads,
and MacBooks in warehouses ready for shipment to retailers.
C. COSTING SYSTEMS
11. Job Order Costing
Definition: A costing system where costs are accumulated separately for each job or batch of
products.
