Inventory is the value of goods the company has produced or bought and not yet sold. Too much inventory can tie up cash, while too little can lead to lost sales.
How it relates
Where it fits
Inventory represents goods held for sale in the ordinary course of business, including raw materials awaiting production, work-in-progress items partially through manufacturing, and finished goods ready for customers. This current asset is critical for product businesses, representing significant capital investment that must be managed carefully to balance customer availability against carrying costs and obsolescence risk.
Inventory components:
- Raw materials: Components and materials awaiting production
- Work-in-progress (WIP): Partially completed products in production
- Finished goods: Completed products ready for sale
- Supplies: Items used in production but not part of the product
Inventory costing methods:
- FIFO: First-in-first-out; oldest costs go to COGS first
- LIFO: Last-in-first-out; newest costs go to COGS first (US only)
- Weighted average: Average cost applied to all units
- Specific identification: Actual cost of specific items sold
Why inventory matters:
- Working capital: Major use of operating cash
- Customer service: Adequate inventory prevents stockouts
- Profitability: Inventory costs flow through COGS to gross profit
- Obsolescence risk: Excess or outdated inventory may require write-downs
Key metrics:
- Days Inventory Outstanding (DIO): (Inventory / COGS) × 365
- Inventory Turnover: COGS / Average Inventory; times sold and replaced per year
- Inventory as % of Revenue: Capital tied up in stock
Analysing inventory:
- Turnover trends: Declining turnover suggests slowing sales or excess stock
- Inventory vs. sales growth: Inventory growing faster than sales is concerning
- Component breakdown: Rising finished goods may indicate weak demand
- Write-down history: Frequent impairments indicate inventory problems
Industry context:
- Grocery: Very high turnover (20-50×); perishable goods
- Apparel: Moderate turnover (4-8×); seasonal fashion risk
- Industrial: Lower turnover (3-6×); longer sales cycles
- Software: Zero or minimal inventory; digital products
Effective inventory management balances availability against carrying costs. Track inventory trends alongside sales to ensure inventory levels remain appropriate for demand.