Section 263A Regulations: Capitalized Costs and Simplified Methods

The Section 263A UNICAP rules require businesses to capitalize the direct costs and a proper share of the indirect costs of producing property or acquiring property for resale, so those costs sit in inventory or asset basis and are recovered only when the property is sold or depreciated. For tax years beginning in 2026, a business is subject to these Uniform Capitalization rules if its average annual gross receipts for the three prior years exceed $32,000,000.¹ Below that threshold, most of what follows does not apply.

Who Is Covered

Section 263A reaches any taxpayer that produces real or tangible personal property, or acquires tangible personal property for resale. “Produce” is defined broadly to include manufacturing, constructing, building, installing, developing, or improving property. A custom equipment maker, a general contractor, and a retailer buying finished goods from a wholesaler are all inside the rule.²

Where the capitalized costs land depends on what the property becomes. Costs assigned to inventory flow through cost of goods sold when the inventory sells. Costs assigned to a self-use asset, like a building the company puts up for its own operations, become part of basis and come out through depreciation.

Intangibles are largely outside the rule. Section 263A does not apply to costs of producing loans, securities, stock, or debt instruments. It does apply, though, to certain creative property that will be mass-distributed in tangible form: books, motion pictures, and sound recordings, including an author’s research and writing costs.³ Incidental items produced as part of a service, like an architect’s blueprint for a client, are excluded.

The Small Business Exemption

The gross receipts test is the most important door out. A business is exempt for 2026 if its average annual gross receipts over the three preceding tax years do not exceed $32,000,000.¹ The number is adjusted for inflation each year and was $31,000,000 for 2025.⁴

Gross receipts for this test include total sales, services, investment income, and other amounts received from all trades or businesses. Related entities under common control must aggregate their receipts, so splitting one business into several does not create an exemption.

Qualifying delivers real relief. The exempt business does not have to capitalize indirect costs for produced or acquired property, is not forced onto the percentage-of-completion method under Section 460 for the covered construction contracts, and is out from under the Section 471 inventory rules.⁵ Costs that a larger competitor has to capitalize and wait to recover, an exempt business can deduct now.

Farming, Timber, and R&D

Congress carved out agriculture and timber directly in the statute. UNICAP does not apply to the costs of raising any animal in a farming business, or to plants with a preproductive period of two years or less, which covers most annual crops.²

Farmers with longer preproductive plants, such as orchards and vineyards, can elect out of UNICAP for all plants they produce. The election is not available to taxpayers required to use the accrual method under Section 447 or 448(a)(3), which cuts out most corporations, partnerships with a C-corporation partner, and tax shelters. A farmer who elects out must accept the alternative depreciation system for all farm assets placed in service during the years the election is in effect.

Timber is excluded separately. Trees raised, harvested, or grown by the taxpayer (other than certain ornamental trees), along with the underlying real property, are outside Section 263A. Research and experimental expenditures that qualify under Section 174 are also excluded, so R&D spending is not both deducted and forced into capitalization.

What Producers Capitalize

A producer capitalizes direct costs and a proper share of indirect costs. Direct costs are the raw materials that become part of the product and the labor of workers who physically make it. Indirect costs are where the work of compliance actually sits: expenses that benefit or support production without being direct materials or labor.

Factory overhead: rent, utilities, depreciation, insurance, and maintenance of production facilities.
Indirect labor: supervisors, quality control, and production support staff.
Officer compensation, allocated by what the officer actually does. The IRS looks past titles, so a president who spends half the week on the factory floor has half of that compensation capitalized, payroll taxes and benefits included.⁶
Employee benefits for production personnel: pension contributions, profit-sharing, and health insurance.
Engineering and design costs for the product or the production process.
Allocable portions of service departments (accounting, HR, legal, IT) that support production.

Self-Constructed Assets

The same rules apply when a business builds something for its own use, like a warehouse or a piece of specialized equipment. Direct costs and allocable indirect costs go into the asset’s basis and come out through depreciation, since the property never enters inventory.⁷

Interest Capitalization

Interest expense gets pulled into basis in three situations: real property the taxpayer produces, tangible personal property with an estimated production period longer than two years, and tangible personal property with an estimated production period longer than one year and estimated production cost above $1,000,000. For products that need aging, like wine or whiskey, the production period runs through the aging process.⁸

What Resellers Capitalize

Retailers and wholesalers capitalize the purchase price of inventory (obvious) plus certain indirect costs of acquiring, storing, and handling that inventory. Those additional costs get allocated to the goods on hand at year-end.

Purchasing costs: wages and overhead of the buying department, including support staff.
Off-site storage and warehousing: rent, depreciation, utilities, insurance, security, and maintenance for storage facilities not physically attached to a retail location.⁹
Handling costs: processing, assembly, repackaging, and transferring inventory between facilities.

Two handling categories drop out. Handling done at a retail sales facility for goods sold to retail customers at that facility is deductible, so unloading, unpacking, marking, and tagging at a retail store are not capitalized. Pick-and-pack costs inside a warehouse are also exempt when the activity prepares an already-ordered shipment for imminent delivery.¹⁰

Costs You Do Not Capitalize

Several categories of indirect cost stay deductible even for a taxpayer inside UNICAP:

Selling, marketing, advertising, and distribution costs.
Section 174 research and experimental expenditures.
Income-based taxes: state, local, and foreign income taxes, and franchise taxes assessed on income.
Amounts expensed under Section 179.
Warranty costs on products already sold and product liability insurance premiums.
On-site storage at a facility physically attached to and part of a retail sales location.
Depreciation on equipment and facilities placed in service but temporarily idle.
Strike-related costs, including hiring costs for replacement workers (though not the replacement wages themselves), security, and related legal fees.
Costs of unsuccessful contract bids.

Certain general overhead departments are treated as deductible service costs so long as they do not predominantly benefit a specific production or resale activity: strategic planning, general financial accounting, tax services, shareholder relations, internal audit, personnel policy, and overall executive management.¹¹

Simplified Methods for the Calculation

Tracing every indirect cost to a specific job or SKU is not realistic for most businesses. The regulations offer formulaic alternatives.

Simplified Production Method

A producer divides all additional Section 263A costs incurred during the year by the Section 471 costs incurred during the year to get an absorption ratio. Section 471 costs are the costs already in inventory under the business’s normal accounting; additional Section 263A costs are the indirect costs tax law requires to be capitalized but that the business does not put in inventory for financial reporting.⁶ The ratio is then applied to the Section 471 costs in ending inventory. A 12 percent absorption ratio against $500,000 of ending inventory adds $60,000 to the inventory balance for tax.

Simplified Resale Method

Resellers run a parallel calculation. A combined absorption ratio is applied to the Section 471 costs of eligible property on hand at year-end, and the result is added to ending inventory for tax purposes.¹⁰

Historic Absorption Ratio

Either simplified method allows an election to lock in a historic ratio instead of recomputing every year. To qualify, the taxpayer must have used the simplified method for at least three consecutive years and computed an actual ratio for each of them.¹² Once elected, the historic ratio runs for a five-year qualifying period, at which point one year of actuals is computed. If the actual result is within half a percentage point of the historic ratio, the period extends another five years. If it diverges further, the taxpayer returns to actual calculations before a new historic ratio can be set.

Changing Methods and the 481(a) Adjustment

Moving into UNICAP, moving out after qualifying for the small business exemption, and changing between calculation approaches are all accounting method changes. Each requires Form 3115, Application for Change in Accounting Method.¹³ Many Section 263A changes are automatic, filed with a timely return and requiring no user fee or advance approval. Non-automatic changes need a user fee and a letter ruling before they take effect.

Every method change carries a Section 481(a) adjustment: the cumulative difference between inventory or asset basis under the old method and the new one. For inventory, that is the revalued figure under the new method minus the previously stated figure. The adjustment is taken in the year of change, though positive adjustments can generally be spread over multiple years under IRS procedures.¹⁴

Businesses that should have been on UNICAP but have not been cannot fix it by quietly capitalizing going forward. That is itself an improper method change. The correct path is Form 3115 with a full Section 481(a) adjustment for all prior years of noncompliance.

Where Businesses Go Wrong

IRS examination guides flag a handful of recurring errors on Section 263A.

Classifying personnel by title instead of function. A vice president doing meaningful production work has a proportionate share of compensation capitalized regardless of the title on the org chart.⁶
Getting storage wrong. Off-site storage is capitalized, on-site retail storage is not, and dual-function facilities have to be allocated between the two.⁹
Cherry-picking cost pools. Purchasing, storage, and handling are tracked separately from mixed service costs, and the simplified service cost method requires all costs in a mixed service department, not a subset.
Reporting mismatches. The Section 263A adjustment must appear on Form 1125-A and be reconciled on Schedule M-3; examiners routinely tie the return to the workpapers.

When a UNICAP error understates tax, the IRS can assess an accuracy-related penalty of 20 percent of the underpayment for negligence, disregard of the rules, or a substantial understatement, on top of interest running from the original due date.¹⁵ Reasonable cause and good faith can waive the penalty, but interest continues to accrue until the tax and any remaining penalty are paid.

1
Internal Revenue Service. Rev. Proc. 2025-32
2
Office of the Law Revision Counsel. 26 USC 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses
3
eCFR. 26 CFR 1.263A-2 – Rules Relating to Property Produced by the Taxpayer
4
Internal Revenue Service. Rev. Proc. 2024-40
5
Federal Register. Small Business Taxpayer Exceptions Under Sections 263A, 448, 460, and 471
6
Internal Revenue Service. Producer’s 263A Computation
7
Office of the Law Revision Counsel. 26 USC 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses
8
eCFR. 26 CFR 1.263A-12 – Production Period
9
Internal Revenue Service. Examining a Reseller’s IRC 263A Computation
10
eCFR. 26 CFR 1.263A-3 – Rules Relating to Property Acquired for Resale
11
eCFR. 26 CFR 1.263A-1 – Uniform Capitalization of Costs
12
eCFR. 26 CFR 1.263A-2 – Rules Relating to Property Produced by the Taxpayer
13
Internal Revenue Service. Instructions for Form 3115 – Application for Change in Accounting Method
14
eCFR. 26 CFR 1.263A-7 – Changing a Method of Accounting Under Section 263A
15
Internal Revenue Service. Accuracy-Related Penalty