Cost of Goods Sold (COGS) Under 2026 GAAP & IRS Standards
Cost of Goods Sold represents the direct expenditures tied to producing merchandise sold by a business or purchasing products resold by a retailer. COGS directly reduces gross revenues on the income statement and is one of the largest corporate tax deductions.
The IRS strictly prohibits deducting inventory purchases immediately as an expense. Inventory must be capitalized on the balance sheet until the product is physically sold, at which point it shifts to COGS on the P&L.
Inventory Valuation Methods Comparison
| Valuation Method | Inflationary Impact on COGS | Impact on Ending Inventory | Net Income Effect in 2026 |
|---|---|---|---|
| FIFO (First-In, First-Out) | Lower COGS | Higher ending inventory value | Higher reported net income |
| LIFO (Last-In, First-Out) | Higher COGS | Lower ending inventory value | Lower taxable income (IRS conformity applies) |
| Weighted Average Cost | Blended average | Smooths price volatility | Balanced reporting |
| Specific Identification | Exact tracked cost | Exact tracked value | Precision for high-ticket unique goods |
The Universal COGS Formula
\text{Total Goods Available for Sale} = \text{Beginning Inventory} + \text{Purchases} + \text{Direct Labor} + \text{Freight-In}
\text{COGS} = \text{Total Goods Available for Sale} - \text{Ending Physical Inventory}
\text{Gross Profit} = \text{Gross Sales Revenue} - \text{COGS}
What Qualifies as COGS vs. Operating Expenses (OPEX)?
- Included in COGS: Raw materials, parts, direct factory assembly wages, inbound freight/tariffs, factory machine packaging supplies.
- Excluded from COGS (OPEX): Sales commissions, marketing/ad spend, corporate office rent, legal fees, administrative salaries, outbound delivery to the customer.