What it means
When you run a business that makes physical products, you need to know exactly how much it costs to build them. This metric captures every expense tied directly to the production floor.
It includes the raw materials you buy, the wages paid to factory workers, and factory overheads like electricity, machine maintenance, and rent for the manufacturing plant. It excludes selling costs, marketing, and head office salaries, focusing strictly on production.
Why does this matter so much for non-finance managers? Because it feeds directly into your cost of sales calculation when items are sold.
If your production costs creep up without you noticing, your profit margins will shrink, even if your sales volume looks healthy. Tracking this figure helps you spot inefficiencies on the factory floor, such as excessive material waste or unnecessary overtime.
In daily practice, business owners and operations managers use this figure to set realistic pricing strategies. If your manufacturing costs are too high compared to what the market is willing to pay, you have a structural problem that needs fixing.
It also helps with inventory valuation, ensuring that the unsold goods sitting in your warehouse are accurately represented on your balance sheet. By keeping a close eye on this metric, you can make better decisions about whether to make products in-house or outsource them.
It acts as an early warning system for operational bloat, giving you the chance to trim expenses before they eat into your net profit. Imagine baking a cake.
The cost of goods manufactured is the total price of your flour, eggs, butter, electricity, and a fair share of your kitchen rent, rather than the box the cake eventually sells in.
In practice
Real-world examples
Example 1
Baker Ben runs a small artisan bread company. His monthly costs include flour, yeast, baker wages, and oven electricity. Adding these up gives him his total production spend for the month. He leaves out the cost of his delivery van and his market stall fees, because those are selling costs and not production costs.
Example 2
Apex Office Chairs spends money on steel frames, mesh fabric, assembly worker salaries, and factory rent. Totalled together, these figures show the exact cost to build their ergonomic chairs. The finance team also adjusts for chairs that are half-assembled at month end, which sit in work in process and move into the next month's calculation.
Example 3
Swift Circuits builds custom computer boards. Their monthly manufacturing calculation combines silicon chips, soldering materials, technician pay, and cleanroom utility bills to find total output costs. Because cleanroom electricity is a large share of the bill, the manager tracks it closely and tests whether running fewer, larger production batches would lower it.
Think of it
Imagine baking a cake. The cost of goods manufactured is the total price of your flour, eggs, butter, electricity, and a fair share of your kitchen rent, rather than the box the cake eventually sells in.
Formula
Calculation
Cost of Goods Manufactured = Beginning Work in Process + Total Manufacturing Costs (Direct Materials Used + Direct Labour + Manufacturing Overhead) - Ending Work in Process
Worked example 1. $10,000 opening work in process plus $50,000 total manufacturing costs minus $5,000 closing work in process equals $55,000.
Worked example 2, with the manufacturing costs built up. A furniture maker starts the month with $8,000 of raw materials, buys $40,000 more, and counts $10,000 left at month end.
- Direct materials used = $8,000 + $40,000 - $10,000 = $38,000
- Direct labour = $25,000
- Manufacturing overhead = $15,000, made up of indirect materials $2,000, utilities $6,000, maintenance $3,000 and factory depreciation $4,000
- Total manufacturing costs = $38,000 + $25,000 + $15,000 = $78,000
- Opening work in process is $12,000 and closing work in process is $7,000, so cost of goods manufactured = $12,000 + $78,000 - $7,000 = $83,000
- If 16,600 wooden stools were completed, the cost per stool is $83,000 / 16,600 = $5.00Case study
Seen in the real world
This is a fictional, illustrative scenario. GreenSpout Manufacturing produces stainless steel water bottles. At the start of March, they had $12,000 worth of unfinished bottles on the production line. During March, they purchased $40,000 of raw steel, paid $25,000 in factory wages, and incurred $15,000 in factory utility and machine maintenance costs.
By the end of March, unfinished bottles still on the line were valued at $7,000. To find their cost of goods manufactured, GreenSpout takes the beginning unfinished stock ($12,000) and adds total production costs ($40,000 materials plus $25,000 labour plus $15,000 overhead, totalling $80,000). This gives $92,000. Finally, they subtract the ending unfinished stock of $7,000, leaving a final cost of goods manufactured of $85,000 for March.
This figure is then transferred to the finished goods inventory account, ready to be matched against revenue when the bottles are sold. The factory completed 17,000 bottles in March, so the cost per bottle is $85,000 / 17,000 = $5.00. If 15,000 bottles were sold during the month, the cost of goods sold is 15,000 x $5.00 = $75,000, and the remaining 2,000 bottles stay in finished goods inventory at $10,000. At a selling price of $9.00, each bottle earns $9.00 - $5.00 = $4.00, a gross margin of 44% ($4.00 / $9.00).
Watch out
Common mistakes
- Including sales and marketing expenses in the manufacturing calculation.
- Forgetting to account for beginning and ending work in process inventory.
- Mixing up general administrative overhead with factory-specific overhead costs.
Questions
People also ask
Is this the same as cost of goods sold?
No. This metric only covers items completed during the period. Cost of goods sold looks at what it cost to make the specific items that were actually sold to customers.
Do service businesses use this metric?
Generally no, because they do not manufacture physical products, though some professional service firms use equivalent cost tracking.
Where does depreciation go?
Depreciation on factory equipment and buildings counts as manufacturing overhead and goes into this calculation, but office equipment depreciation does not.