What are direct materials used?
Direct materials are raw materials that become part of the finished product and can be directly and economically traced to it. Direct materials used is the quantity of those materials actually consumed during a production period — not everything purchased, and not everything still sitting in the storeroom.
The distinction between purchased, available, and used is at the core of materials accounting. A manufacturer might purchase 10,000 units of raw steel in a month, have 1,500 left over from the prior month, and end the month with 2,000 on hand. That means 9,500 units were actually used in production — not 10,000.
Raw materials traced directly to the product — steel, fabric, wood, chemicals. The cost varies directly with production volume.
Wages paid to workers directly involved in production. Together with direct materials, forms the "prime cost" of a product.
Indirect costs — factory rent, utilities, depreciation. Not directly traceable to one unit but allocated across production.
Direct materials used feeds into Cost of Goods Manufactured (COGM), which in turn feeds into Cost of Goods Sold (COGS) on the income statement. Getting the materials figure right is therefore foundational to accurate product costing.
Direct materials used formula
The standard formula uses a beginning-to-ending inventory flow to determine how much material was consumed:
Purchases = raw materials bought during the period
Ending Raw Materials = inventory on hand at period end
Result = units (or cost) of materials consumed in production
The logic is simple: you started with some stock, you added more by purchasing, and whatever is not left at the end must have been used. This is the same flow as any inventory movement calculation.
Full inventory waterfall
For a manufacturer with $18,000 in beginning materials, $95,000 in purchases, and $14,000 in ending materials:
To calculate cost of direct materials used
When working in units rather than dollars, multiply the units used by the cost per unit to get the total cost of direct materials used:
How to calculate direct materials used — step by step
Worked examples
Four scenarios across manufacturing, job-order, and standard costing contexts.
Single-material production
Beginning: $12,000 · Purchased: $68,000 · Ending: $9,500
✓ $70,500 in direct materials consumed this period.
Units used × cost per unit
Beginning: 2,000 lb · Purchased: 15,000 lb · Ending: 3,200 lb · Cost: $4.50/lb
→ 13,800 lb used at $62,100 total materials cost.
Two-material product
Material A: Begin $5,000 / Buy $22,000 / End $4,200 = $22,800 used. Material B: Begin $3,100 / Buy $18,500 / End $2,600 = $19,000 used.
✓ Calculate each material separately, then sum.
New production run
No beginning stock. Purchased $45,000. Ending inventory: $6,800.
→ Common for new product lines or first production run.
Cost of direct materials used — the full calculation
In a full cost accounting context, "direct materials used" appears as a dollar figure in the Cost of Goods Manufactured (COGM) schedule. Here is how the cost builds from units through to finished goods:
This $62,100 then flows into the COGM schedule alongside direct labor cost and applied manufacturing overhead. The total manufacturing cost is added to beginning Work in Process (WIP) and ending WIP is subtracted to arrive at Cost of Goods Manufactured.
Direct materials variance analysis
In standard costing systems, companies compare the actual cost of materials used against the standard cost that should have been incurred. The difference is split into two variances:
A favorable variance means actual cost was lower than standard. An unfavorable variance means actual cost exceeded standard. Isolating price from quantity variance helps management identify whether the problem is in procurement (price) or in the production process (usage).
Common mistakes to avoid
- Confusing purchased with used. Purchases increase the materials pool; direct materials used is what actually flowed into production. These are only equal if beginning and ending inventories are both zero.
- Including indirect materials in the direct materials figure. Consumables like machine oil, cleaning supplies, and small fasteners are manufacturing overhead — not direct materials — because they cannot be economically traced to individual units.
- Using different valuation methods inconsistently. If you use FIFO for beginning inventory, you must use FIFO for ending inventory in the same calculation. Mixing FIFO and LIFO produces an incorrect materials used figure.
- Forgetting to include freight-in as part of materials cost. The cost of getting materials to the factory is typically added to the purchase price. Omitting it understates the true cost of direct materials used.
- Using purchase orders instead of goods received. Under accrual accounting, purchases are recorded when materials arrive and are accepted — not when the PO is raised or when the invoice is paid.
- Skipping physical inventory counts. A perpetual system can accumulate errors over time. Periodic physical counts are needed to catch shrinkage, spoilage, or recording errors that make the ending inventory figure unreliable.
FAQ
What is direct materials used?
Direct materials used is the quantity (or dollar cost) of raw materials actually consumed in production during an accounting period. It is calculated as beginning raw materials inventory plus purchases minus ending raw materials inventory.
What is the difference between direct materials purchased and direct materials used?
Purchased refers to materials acquired during the period. Used refers to materials actually consumed in production. The difference is captured in the change in raw materials inventory — if ending inventory is higher than beginning, you used less than you bought; if lower, you used more.
Are direct materials the same as raw materials?
Not exactly. Raw materials is a broader category that includes both direct materials (traceable to a product) and indirect materials (manufacturing overhead). Direct materials is a subset — the portion of raw materials that can be economically traced to specific units of output.
How does direct materials used flow into financial statements?
Direct materials used feeds into the Cost of Goods Manufactured (COGM) schedule — combined with direct labor and manufacturing overhead, adjusted for WIP inventory. COGM then flows into Cost of Goods Sold on the income statement when finished goods are sold.
What is the direct materials quantity variance?
It is the difference between actual materials used and the standard quantity that should have been used for actual output, multiplied by the standard price. A favorable variance means less material was used than expected; unfavorable means more was used. This variance reflects production efficiency, not purchasing price.
Can direct materials used be higher than purchases in a period?
Yes — if beginning inventory was large relative to ending inventory. The calculation pulls from both what was already on hand and what was bought during the period. A production surge can consume more than the period's purchases by drawing down prior stock.