Small Business Inventory Accounting for Business Owners

If you run a business that buys, makes, or sells merchandise, you’ve probably assumed you have to wait until an item sells before you can deduct its cost. For decades, that was the rule.

But the Tax Cuts and Jobs Act changed that for small businesses, and the change is still one of the most overlooked tax planning opportunities available today. Depending on how your books are kept, you may be able to deduct inventory costs the year you pay for them, not the year you sell the product.

Understanding your small business inventory accounting options can help you simplify recordkeeping, improve cash flow, and potentially claim valuable deductions sooner.
For many owners, small business inventory accounting feels like a technical bookkeeping issue. In reality, the method you choose can affect when expenses are deducted, how much taxable income you report, and how much cash stays in the business.

The Old Rule vs. the New Option

Under the traditional federal tax rule, any business in the business of producing, buying, or selling merchandise has to keep inventory records and can only deduct the cost of that merchandise in the year it’s actually sold. That’s still the default.
The newer small business inventory accounting rules give qualifying businesses more flexibility. Instead of automatically following the traditional inventory method, eligible businesses may choose an approach that better reflects how they actually operate and maintain their records.

Since 2018, small businesses have had three optional alternative ways to handle inventory instead:

• Treat it as non-incidental materials and supplies
• Treat it the same way it’s treated in an applicable financial statement (AFS)
• Treat it the same way it’s treated in the business’s own books and records

Businesses that choose one of these alternatives are also allowed to use the simpler overall cash method of accounting, instead of the accrual method normally required when inventories are involved.

Redbud Tax & Advisors Tip: Using the cash method combined with immediate inventory expensing gives a business real control over the timing of its taxable income.

Do You Qualify for Simplified Small Business Inventory Accounting?

For these rules, a small business is one whose average gross receipts over the previous three tax years fall under an inflation-adjusted threshold. For 2026, that threshold is $32 million (up from $31 million in 2025).

This gross-receipts test is important because it determines whether a company can use the simplified small business inventory accounting rules and the cash method of accounting.

Gross receipts for this test include:

• Total sales, after returns and allowances
• All amounts received for services
• Interest, dividends, rents, royalties, and annuities from business investments

Cost of goods sold does not reduce gross receipts, though gain or loss from selling a capital asset does count. All trades or businesses owned by the same individual get combined for this test, and if a business hasn’t been around for three full years yet, the IRS looks only at the years it has existed.

Place this immediately before the list of the three available methods:

There are three main small business inventory accounting alternatives available to qualifying taxpayers:

• Treat inventory as non-incidental materials and supplies
• Follow an applicable financial statement
• Follow the business’s own books and records

Option 1: Non-Incidental Materials and Supplies (NIMS)

Businesses under the $32 million threshold can use the cash method and treat inventory as non-incidental materials and supplies. Under this method, the cost is deducted in the later of:

• The year the materials are used or consumed in the business, or
• The year the business pays for them

Within small business inventory accounting, the NIMS method is often most useful for manufacturers because it may allow certain labor and overhead expenses to be deducted sooner.

For a reseller who buys finished merchandise, this doesn’t actually accelerate the deduction, since the timing ends up matching the regular inventory rules. The real benefit for resellers is simply being allowed to use the cash method.

For small manufacturers, though, NIMS can be genuinely valuable. Normal inventory accounting bundles direct labor into the cost of finished goods, so it isn’t deductible until the product sells. Under NIMS, direct labor doesn’t get capitalized into inventory at all, meaning production wages can often be deducted as they’re paid.

On top of that, the uniform capitalization rules that normally force a portion of overhead onto inventory don’t apply under NIMS. Overhead tied to production can be deducted as it’s incurred.

Option 2: Applicable Financial Statement (AFS) Method

This option only applies to businesses that maintain a qualifying applicable financial statement, such as:

• A certified GAAP statement, like a Form 10-K, an SEC shareholder statement, or an audited statement used for credit or ownership reporting
• A non-tax-return financial statement filed with a federal agency, state agency, or a self-regulatory body like FINRA
• A qualifying IFRS or foreign audited financial statement

For companies with audited financial statements, this small business inventory accounting method can help keep tax reporting more closely aligned with financial reporting.

Businesses using this method recover inventory costs consistent with how those costs are treated on the AFS. One important limit: a cost that isn’t deductible or recoverable elsewhere under the tax code (illegal bribes, fines, penalties, non-deductible lobbying, and similar items) can’t be treated as a deductible inventory cost just because it shows up on the AFS.

It’s also worth knowing that audited GAAP financial statements generally keep inventory on the books as an asset until it’s sold or impaired, though GAAP does permit some related costs, like abnormal spoilage or unallocated fixed overhead from low production, to be expensed currently.

Option 3: Books and Records Method

If a business doesn’t have an AFS, it can deduct inventory costs consistent with its own books and records, as long as those records follow the business’s regular accounting procedures.

For many privately owned companies, the books and records method is the most practical small business inventory accounting option because it follows the accounting system the business already uses.

For many qualifying companies, this is one of the most flexible small business inventory accounting methods because it allows the tax treatment of inventory to follow the way the business regularly maintains its financial records.

To use this small business inventory accounting strategy successfully, the business generally needs to meet the following conditions:

Any small business under the $32 million threshold can pair this with the cash method for both tax and book purposes. Under the cash method, income is recorded when cash comes in and expenses when cash goes out, so inventory gets expensed on the books at the time of purchase. There’s no year-end cost of goods sold calculation required, and the uniform capitalization rules don’t apply.

Example: A cash-basis bakery owner without an AFS capitalizes cookie ingredients to inventory in her books but expenses employee wages as they’re paid. Even though direct labor is normally required to be capitalized into inventory, because her own books expense those wages instead, she can deduct the labor costs in the year paid rather than waiting until the cookies sell.

The catch: all of the business’s books and records have to treat inventory costs as currently expensed, not just the tax return. The IRS looks broadly at what counts as “books and records,” including physical inventory counts and point-of-sale systems.

Example: A beverage retailer expenses all its inventory costs in its bookkeeping software, but its staff also does a year-end physical count that gets used to report inventory value to its lender. Because that physical count is being used to allocate costs to inventory for a non-tax purpose, the business can’t fully expense its purchases. It’s limited to deducting only the cost of goods actually sold, based on that count.

Example: Same retailer, but this time the physical count and electronic records are used only for reordering, not for allocating costs or reporting inventory value to lenders. In that case, the full amount paid for inventory during the year is deductible.

• Gross receipts under $32 million for the prior three years
• No applicable financial statement for the year
• Overall cash method used for both tax and book purposes
• Books and records that expense inventory rather than capitalize it
• No use of inventory counts, in any records, to allocate costs
• Not classified as a tax shelter

Changing Your Accounting Method

An existing business can’t just start using these methods without IRS approval. The switch requires filing Form 3115, Application for Change in Accounting Method, by the due date of the tax return for the year of change, including extensions. The change is automatically approved by the IRS once properly filed.

If a business is also picking up a deduction for unsold inventory carried over from prior years, that requires a Section 481(a) adjustment on the same Form 3115, which lets the full cost of that old inventory be deducted in a single year.

Watch Out: Tax Shelters Don’t Qualify

Regardless of how small the business is, tax shelters are barred from using any of these inventory exceptions. This includes:

• Entities other than C corporations whose interests were offered for sale in a registered securities offering
• “Syndicates,” where more than 35% of losses for the year are allocated to passive limited partners or limited entrepreneurs
• Any entity or arrangement with a significant purpose of avoiding or evading federal income tax

Even when a company meets the revenue threshold, it cannot use the simplified small business inventory accounting exceptions if it is treated as a tax shelter under federal tax law.

The syndicate rule is the one that catches people off guard. An ordinary LLC, partnership, or S corporation with passive investors can accidentally trip into syndicate status in any year where more than 35% of its losses land on those passive owners, even if that wasn’t the intent. Syndicate status is tested year by year, so a business can fall into it in a loss year and be clear of it the next. There’s also an irrevocable election available to use a prior profitable year’s allocation instead, to avoid disqualification in a losing year.

Key Takeaways

• Businesses with gross receipts under $32 million can skip the traditional “deduct only when sold” inventory rule and use the cash method of accounting.
• The NIMS method lets a business deduct inventory in the later of the year it’s used/consumed or the year it’s paid for, and can accelerate labor and overhead deductions for manufacturers.
• The AFS method ties inventory deductions to a certified financial statement, though GAAP statements generally don’t allow full expensing.
• The books and records method can allow a business to deduct inventory the year it’s purchased, as long as no books or records capitalize those costs anywhere.

Redbud Tax & Advisors Tip

These inventory methods can meaningfully change how much taxable income a business reports in a given year, but the wrong method, or inconsistent books, can just as easily create a problem during an IRS review. Before changing your small business inventory accounting method, it is worth having your current bookkeeping procedures and Form 3115 filing reviewed by a tax professional who can confirm that the strategy fits your business.

Redbud Tax & Advisors helps individuals and businesses navigate evolving federal tax laws through proactive tax planning, bookkeeping, and advisory services tailored to each client’s situation.

Visit Redbud Tax & Advisors to schedule a consultation and discuss tax strategies tailored to your business structure.