Cost of Goods Sold (COGS)
Cost of goods sold is the cost assigned to goods sold during a reporting period and is deducted from revenue to calculate gross profit.
Core relationship
Revenue − COGS = Gross profit
If:
- revenue: $200 million
- COGS: $120 million
gross profit is:
$80 million
Gross margin:
40%
COGS therefore directly determines the first major profitability layer.
Inventory connects COGS to the balance sheet
For inventory businesses, a simplified relationship is:
Beginning inventory + purchases/production − ending inventory = COGS
Assume:
- beginning inventory: $50 million
- purchases: $140 million
- ending inventory: $60 million
Simplified COGS:
$130 million
The exact accounting can be more complex, but the bridge explains why inventory and COGS are linked.
Real 2026 example
A 2026 SEC filing reported:
- net revenue: $33.805 million
- COGS: $24.371 million
- gross profit: $9.434 million.[2]
COGS represented the majority of sales dollars in that quarter.
What can be included
Manufacturing COGS can include:
- raw materials
- direct labor
- factory overhead
- production depreciation
- freight-in
- inventory write-downs
Retail COGS often focuses on merchandise cost.
The exact composition varies.
What is usually excluded
Broader operating costs often sit outside COGS, such as:
- corporate administration
- sales and marketing
- research and development
- financing costs
- income taxes
But classification practices can differ.
A company-specific income statement is the source of truth.
Cost of revenue
Software, subscription and services businesses often report:
cost of revenue
Possible components include:
- hosting
- customer support
- implementation labor
- third-party service fees
- payment processing
- amortization tied to delivery
Comparing gross margins across industries requires understanding those classifications.
COGS and inventory method
Inventory accounting methods can affect:
- COGS
- ending inventory
- gross profit
- taxes
during periods of changing prices.
Two businesses with similar physical economics can report different COGS because of permitted accounting methods and cost-flow assumptions.
Inflation can raise COGS
If input costs rise:
- materials cost more
- freight rises
- labor rises
COGS can increase before the company fully raises selling prices.
Gross margin compresses.
The speed of price adjustment determines how much inflation reaches profitability.
Volume affects total COGS
If unit cost remains constant and sales volume doubles:
total COGS rises.
That is not a deterioration.
A useful review separates:
- unit cost
- total volume
- selling price
- product mix
Dollar growth in COGS alone says little.
Mix can change COGS percentage
Suppose a business sells:
- hardware at 70% cost ratio
- software at 20% cost ratio
A shift toward software can lower consolidated COGS as a percentage of revenue.
The cost structure of each product may be unchanged.
Mix caused the improvement.
Inventory write-downs can enter COGS
Obsolete or excess inventory can require write-downs.
Those charges can increase COGS or otherwise reduce gross profit depending on presentation.
A sudden gross-margin decline can therefore reflect an inventory-quality problem rather than ordinary production cost.
COGS and inventory turnover
Inventory turnover commonly uses:
COGS ÷ average inventory
COGS is aligned with inventory because both are measured at cost.
Using revenue instead can mix selling price with inventory cost.
COGS and cash are not identical
COGS recognized this period can relate to inventory purchased in an earlier period.
Cash paid to suppliers can occur:
- before purchase
- at purchase
- after purchase
That is why COGS and cash paid for inventory can differ materially.
Working-capital analysis bridges the timing.
Common mistakes
"COGS equals cash paid to suppliers this period."
No.
"Lower COGS is always better."
Not if lower cost comes from lower sales volume.
"Every company includes the same costs."
No.
"COGS applies only to manufacturers."
Retailers and many other product businesses use it; services may use related labels.
Example
Beginning inventory of $50 million plus $140 million of purchases minus $60 million of ending inventory produces simplified COGS of $130 million.
Professional note
Break COGS changes into price, volume, product mix, input cost and accounting classification. Compare the line with inventory, gross margin and cash flow. A percentage improvement is most valuable when it comes from durable unit economics rather than temporary accounting or mix effects.
Related terms
- Inventory Turnover
Inventory turnover measures how many times inventory is sold or otherwise consumed relative to average inventory during a period. A common formula is cost of goods sold divided by average inventory.
- Inventory
**Inventory** consists of goods, materials and production costs held for sale or for use in producing goods that will be sold. Common categories include raw materials, work in process and finished goods. Inventory is a current asset for many businesses, but book value does not guarantee full cash realization.
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