Tax Code Section 471(c): Small Business Inventory Methods

The Section 471(c) small business inventory exemption lets a qualifying business skip the traditional tax inventory rules and instead follow the inventory treatment already used in its own books. It was added by the Tax Cuts and Jobs Act of 2017, and it is available to any business (other than a tax shelter) whose three-year average gross receipts stay at or below an inflation-adjusted threshold set at $25 million in the statute and indexed upward each year.¹ The payoff is less time maintaining a separate tax inventory system and, in most cases, faster deductions for inventory-related costs.

Who Qualifies

Eligibility runs through the gross receipts test in IRC Section 448(c). Add your gross receipts for the three tax years before the current one, divide by three, and compare to the threshold. If the average is at or below the limit, you qualify for the current year.²

The threshold moves. The statutory figure is $25 million, but the IRS adjusts it each year for inflation and rounds to the nearest million. It was $30 million for 2024 and $31 million for 2025. The current-year number comes out in an annual revenue procedure, so check that before filing.

The test is redone every year. Passing once does not lock in eligibility, and a strong revenue year can push your three-year average over the line. Tax shelters, as defined in Section 448(a)(3), are excluded no matter how small their receipts.¹

Aggregation for Related Businesses

You can’t split a larger operation into pieces and test each one separately. Section 448(c)(2) requires businesses under common control to combine their receipts before applying the test, treating entities that would be a single employer under Sections 52(a), 52(b), 414(m), or 414(o) as one taxpayer.² Parent-subsidiary groups, brother-sister groups, and affiliated service groups all fall under this rule, and the legal form of each entity does not matter. A sole proprietor with a partnership interest may need to combine receipts from both.

Missing the aggregation step can disqualify the entire group and expose you to using an impermissible accounting method. If you have any related entities, this is the moment for professional advice.

The Two Simplified Methods

Once you pass the gross receipts test, Section 471(c) gives you a choice between two methods. Either replaces the traditional cost-based rules of Section 471(a).¹

Non-Incidental Materials and Supplies

Under the NIMS method, inventory is treated as non-incidental materials and supplies rather than as balance-sheet inventory. You recover the cost through cost of goods sold in the year you provide the item to your customer, or in the year you pay for or incur the cost, whichever comes later.³

The costs you include are limited to direct material costs for items you produce or the purchase cost for items you buy for resale. Direct labor and indirect overhead are not capitalized into inventory. You deduct them in the year paid or incurred, and for many small manufacturers and resellers that timing difference is the single biggest tax benefit of the election. Tracking can use specific identification, FIFO, or average cost. LIFO is not permitted.

Applicable Financial Statement or Books Method

The second option lets you use whichever inventory method appears on your applicable financial statement (an AFS is, in order of priority, an SEC filing like a 10-K, then an audited GAAP financial statement used for a substantial nontax purpose, then a statement filed with another federal agency for nontax purposes).⁴ If you don’t have any AFS, you use the inventory method from your own books and records prepared under your regular accounting procedures. That fallback is what makes this option practical for very small businesses that never undergo a formal audit.¹

One guardrail applies either way. You cannot recover any cost that has not yet been paid or incurred under your overall accounting method. Cash or accrual still controls timing, even if your financial statements recognize the cost earlier.

The UNICAP Exemption

Passing the same gross receipts test also frees you from the Uniform Capitalization rules under Section 263A. UNICAP normally forces manufacturers, wholesalers, and retailers to capitalize a long list of indirect costs (storage, purchasing, handling, and certain administrative overhead) into inventory, so those costs only reduce taxable income when the goods sell.⁵ A qualifying small business skips that step and deducts those costs in the year paid or incurred.

The exemption also reaches self-constructed assets. Under the final regulations, a small business taxpayer is not required to capitalize costs under Section 263A for any real or tangible personal property produced during a qualifying year.⁶ Other capitalization rules, like Section 263(a), still apply on their own.

How to Elect the Method

Switching to Section 471(c) is a change in accounting method. File Form 3115, Application for Change in Accounting Method, with your timely filed return (including extensions) for the year the change takes effect. It qualifies as an automatic change, so you do not need individual IRS approval. The current list is in Rev. Proc. 2024-23, which assigns designated change number 261 to the Section 471(c) AFS and non-AFS methods.⁷

The change carries a Section 481(a) adjustment that captures the cumulative difference between the old and new methods so income and deductions are neither doubled up nor lost.⁸ The direction of that adjustment controls the timing:

A negative (favorable) adjustment, which is the typical result when moving to 471(c) because the new method accelerates deductions, reduces taxable income and is taken entirely in the year of change.
A positive (unfavorable) adjustment is spread ratably over four tax years, the year of change plus the next three.

The Internal Revenue Manual confirms this split.⁹ Most small businesses adopting 471(c) will see a negative adjustment and get the full benefit in year one.

If You Grow Past the Threshold

Because the test runs every year, crossing the threshold ends eligibility going forward. You then have to change back to a permissible method under Section 471(a) and begin complying with UNICAP if it applies. That reverse change is itself an accounting method change requiring Form 3115 and its own 481(a) adjustment.

Crossing the line does not trigger a penalty on its own, but continuing to use the simplified method after you no longer qualify is treated as using an impermissible method. If your business is running near the limit, project your three-year average before year-end so the transition does not catch you unprepared.

1
Office of the Law Revision Counsel. 26 US Code 471 – General Rule for Inventories
2
Office of the Law Revision Counsel. 26 US Code 448 – Limitation on Use of Cash Method of Accounting
3
eCFR. 26 CFR 1.471-1 – Need for Inventories
4
Office of the Law Revision Counsel. 26 US Code 451 – General Rule for Taxable Year of Inclusion
5
eCFR. 26 CFR 1.263A-1 – Uniform Capitalization of Costs
6
Internal Revenue Service. Section 263A Costs for Self-Constructed Assets (LB&I Concept Unit)
7
Internal Revenue Service. Rev. Proc. 2024-23 – Changes in Accounting Periods and Methods of Accounting
8
Office of the Law Revision Counsel. 26 US Code 481 – Adjustments Required by Changes in Method of Accounting
9
Internal Revenue Service. Internal Revenue Manual 4.11.6 – Changes in Accounting Methods