Raw materials are inventory. Under U.S. accounting rules, any tangible goods a business holds to consume in producing products for sale qualify as inventory, and raw materials sit alongside work-in-process and finished goods as one of the three core inventory categories. That classification is not just bookkeeping trivia. It determines how you value those materials on the balance sheet, when you can deduct their cost for tax purposes, and which federal accounting rules apply to your business.
What Counts as Raw Materials Inventory
Under U.S. Generally Accepted Accounting Principles, inventory includes all tangible personal property a company holds for sale, has in production, or plans to consume in manufacturing goods for sale. Raw materials fall into that last bucket. They are the basic substances and components waiting to be transformed into something sellable: lumber at a furniture factory, steel coils at an auto plant, flour at a bakery.
The classification separates raw materials from two things they get confused with. They are not merchandise inventory. A retailer buying finished products to resell holds merchandise; a manufacturer buying ingredients to build something new holds raw materials. And they are not fixed assets. A machine bolted to the factory floor gets depreciated over years. The steel fed into that machine is inventory that gets expensed once it enters production.
Federal tax law reinforces this. Under the Internal Revenue Code, any taxpayer whose business requires tracking goods must account for inventory in a way that clearly reflects income, and raw materials are explicitly part of that calculation.
Direct Versus Indirect Materials
Not all raw materials hit your books the same way. The split between direct and indirect materials drives how you assign costs to the products you build.
Direct materials are the components you can trace to a specific finished product without guesswork. The plywood in a bookshelf, the fabric in a garment, the circuit board in a laptop. You know how much of each goes into one unit, so you assign that cost straight to the product.
Indirect materials are the items you need for production but cannot practically trace to a single unit. Glue, sandpaper, machine lubricant, disposable gloves. You use them across dozens of products in varying amounts, and tracking each drop of adhesive to a specific bookshelf would cost more than the adhesive itself.
The accounting consequence follows. Direct material costs get assigned to specific units and flow through your cost-of-goods-sold calculation tied to those units. Indirect material costs get pooled into manufacturing overhead and spread across everything produced during the period. The common allocation bases are direct labor hours, direct labor costs, or machine hours. Businesses with complex operations sometimes use activity-based costing for a more precise allocation.
How Raw Materials Appear on the Balance Sheet
Raw materials appear as a current asset, grouped under the inventory line. They qualify as current assets because you expect to use them or convert them to cash within a year or one operating cycle, whichever is longer.
The dollar amount you record is not just the price you paid the supplier. You must capitalize all costs necessary to bring those materials to your production facility in their current condition. That includes freight charges, import duties, and handling costs. Trade discounts reduce the recorded cost; they are not booked separately as income.
When you pull materials from the warehouse and send them to the production floor, the cost moves from the raw materials inventory account to work-in-process inventory. This transfer is typically documented with an internal requisition form. As production continues and more labor and overhead get added, the accumulating cost eventually shifts to finished goods inventory. Once you sell the product, that entire accumulated cost becomes cost of goods sold on your income statement. Raw materials to work-in-process to finished goods to cost of goods sold: that is the lifecycle of every dollar you spend on production inputs.
Consignment Materials Are Not Yours
If you receive raw materials on consignment from a supplier, those materials do not go on your balance sheet. The supplier retains ownership and the associated risk of loss, theft, or obsolescence until you actually use or purchase the goods. Under current accounting standards, the key question is who controls the asset, and in a consignment arrangement control stays with the consignor. This catches some businesses off guard when they physically possess materials in their warehouse but cannot count them as their own inventory.
Valuation Methods
Because you buy the same raw material at different prices over time, you need a consistent method to determine which costs attach to the materials you used and which costs remain on your balance sheet. Three methods dominate.
First-In, First-Out (FIFO)
FIFO assumes the oldest materials get used first. When prices are rising, this leaves the most recently purchased, higher-cost materials on your balance sheet, which inflates reported inventory value and produces a lower cost of goods sold. The result is higher taxable income during inflationary periods. Most companies find FIFO intuitive because it mirrors the actual physical flow of perishable or time-sensitive materials.
Last-In, First-Out (LIFO)
LIFO assumes the newest materials get consumed first. During inflation, this matches higher recent purchase costs against revenue, which lowers taxable income. That tax benefit is the primary reason companies adopt LIFO, but it comes with strings.
The biggest is the conformity rule. If you elect LIFO for tax purposes, you must also use LIFO when reporting to shareholders, creditors, and other outside parties. You cannot show investors a rosier FIFO income number while telling the IRS you had lower LIFO profits. Violating this requirement can force you off LIFO entirely.
Once you elect LIFO, it sticks. You must continue using it in every subsequent year unless the IRS approves a change. And if your business reports under International Financial Reporting Standards rather than U.S. GAAP, LIFO is not an option. IAS 2 permits only FIFO, weighted average, and specific identification.
Weighted Average Cost
This method calculates a single average cost per unit by dividing the total cost of all identical materials in stock by the total number of units. Every unit on hand and every unit used carries the same blended cost. The approach smooths out price swings and simplifies record-keeping, which makes it popular for businesses that buy large volumes of interchangeable materials where tracking specific lots adds no useful information.
Whichever method you choose, you must apply it consistently from year to year. Switching methods requires IRS approval and can trigger income adjustments to prevent you from picking the most favorable treatment in any given year.
Writing Down Raw Materials That Lose Value
Inventory cannot sit on your balance sheet at a value higher than what you can actually recover from it. Under current GAAP, businesses using FIFO or weighted average must measure inventory at the lower of its recorded cost or its net realizable value, which is the estimated selling price of the finished product minus the costs to complete and sell it. If the market price of a raw material drops below what you paid, you write the inventory down to that lower value. The write-down hits your income statement as a loss in the period it occurs. You do not get to reverse that loss if prices recover later.
For companies using LIFO, the older rule still applies: you compare cost against replacement cost, bounded by a ceiling of net realizable value and a floor of net realizable value minus a normal profit margin. This is the traditional lower-of-cost-or-market test.
For federal tax purposes, the IRS uses the lower-of-cost-or-market framework regardless of your GAAP method. “Market” means the current bid price on the inventory date, which is effectively your replacement cost rather than what you could sell the item for. The cost basis for produced goods includes raw materials, labor, and a share of overhead expenses.
Damaged, obsolete, or otherwise impaired raw materials get special treatment. If materials are unsalable at normal prices because of damage, style changes, or broken lots, you value them based on their actual usability, but never below scrap value. You bear the burden of proving the materials are genuinely impaired, which typically requires evidence of an attempted sale, an actual sale at reduced price, or a canceled purchase contract within 30 days of the inventory date. When materials are completely obsolete with zero market demand, courts have found that requiring a sale attempt would be unreasonable.
Shrinkage and Obsolescence
Shrinkage is the gap between what your records say you own and what a physical count reveals. It comes from theft, spoilage, evaporation, breakage, and counting errors. When you discover shrinkage, you record the loss as an expense in the period it occurred, matching it against that period’s revenue. The expense typically flows through cost of goods sold. Federal tax law also permits you to use shrinkage estimates in your inventory method, as long as you conduct regular physical counts at each location and adjust estimates when actual shrinkage differs from what you projected.
Obsolescence is a different problem. Materials become obsolete when the products they were meant to build are discontinued, when specifications change, or when the materials degrade past the point of usefulness. Under GAAP, you handle this through either a direct write-off or an inventory reserve.
With a direct write-off, you reduce the inventory account and record an equal expense immediately. With a reserve, you create a contra-asset account that gradually accumulates estimated obsolescence losses. When you finally dispose of the materials, you reverse the reserve against the inventory account. The reserve approach is more common for businesses that experience predictable, ongoing obsolescence because it avoids lumpy income statement hits. Either way, catching the problem early matters. Sitting on obsolete raw materials inflates your reported assets and misleads anyone reading your financial statements.
Federal Tax Rules and the Small Business Exemption
Federal tax law generally requires businesses that produce or resell goods to maintain formal inventories. But the Tax Cuts and Jobs Act carved out a significant exception for smaller businesses.
Section 471(c) Small Business Exemption
If your average annual gross receipts over the prior three years do not exceed $32 million (the inflation-adjusted threshold for 2026), you can skip the complex inventory accounting rules entirely. You have two simplified options: treat your inventory as non-incidental materials and supplies, or use whatever method matches your financial statements or internal books.
The materials-and-supplies route means you deduct the cost of raw materials in the year you first use or consume them in operations, rather than waiting until the finished product sells. That is a meaningful cash-flow advantage for small manufacturers because it accelerates deductions. Keep records of when materials leave storage and enter production, because the deduction attaches to the consumption date, not the purchase date.
Uniform Capitalization (UNICAP)
Larger manufacturers face an additional layer. Section 263A of the Internal Revenue Code requires businesses that produce property or acquire goods for resale to capitalize not just the direct cost of raw materials but also a portion of indirect costs like factory rent, utilities, and warehouse expenses into the value of their inventory. Those costs sit on the balance sheet as part of inventory until the goods are sold.
The same $32 million gross receipts threshold exempts you from UNICAP. If your three-year average revenue stays below that line, you do not need to allocate indirect costs into your inventory for tax purposes. Once you cross it, the full capitalization regime kicks in, and the accounting burden increases substantially.
The Section 471(c) inventory exemption and the Section 263A UNICAP exemption share the same gross receipts test, so small businesses that qualify for one generally qualify for both. One caveat: even if you treat raw materials as non-incidental materials and supplies under the small business exception, any materials you physically incorporate into property you produce could still be subject to capitalization under Section 263A if you exceed the threshold in a future year. Crossing the $32 million line means re-evaluating both rules simultaneously.
State Personal Property Tax on Inventory
Beyond federal income tax, raw materials inventory can trigger state-level personal property taxes. A majority of states and the District of Columbia exempt business inventory from personal property tax entirely. A handful of states fully tax it, and a few others impose partial taxes or offer credits to offset the burden. If you operate in a state that taxes inventory, the assessed value of your raw materials on a specific date each year becomes part of your property tax bill. That creates an incentive to minimize on-hand inventory around assessment dates, and it is one reason just-in-time purchasing carries tax benefits beyond the obvious operational ones.