Employee salary is treated as a capital item whenever the work produces or improves something with a useful life extending beyond the current year. The paycheck itself doesn’t change, but the tax and accounting treatment does: instead of reducing this year’s taxable income, the wages get attached to an asset and recovered over time through depreciation or amortization. The four situations where this happens most often are self-constructed fixed assets, inventory production, internal-use software development, and foreign research and development.
The Default Rule and What Overrides It
Most wages are deductible in the year you pay them. Salaries for salespeople, office administrators, executives, and other staff whose work benefits current operations flow through the income statement immediately because the labor is consumed generating this year’s revenue.
The trigger for capitalization is future benefit. If the labor produces or improves an asset with a useful life extending well beyond the current year, the cost has to be attached to that asset. The tax code and accounting standards then dictate how quickly you can recover it. Everything below is a specific application of that single principle.
Building Your Own Fixed Assets
When a company uses its own employees to build a long-lived tangible asset, the wages tied to that construction get capitalized into the asset’s cost basis. This applies whether the project is a new warehouse, custom manufacturing equipment, or an expansion of an existing facility. The labor is not deducted in the year the employee works; it becomes part of the asset and is recovered through depreciation across the asset’s useful life.1Internal Revenue Service. Section 263A Costs for Self-Constructed Assets
Section 263A requires capitalization of both the direct costs of the property and the property’s proper share of indirect costs allocable to it.2Office of the Law Revision Counsel. 26 USC 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses In practice, two categories of labor get pulled in:
- Direct labor. Wages, payroll taxes, and benefits for employees physically working on the construction project, such as a welder fabricating structural beams or an electrician wiring the building. These hours must be tracked and fully capitalized.
- Indirect labor. Compensation for employees whose work supports the project without physically building it, including supervisors overseeing the construction, engineers designing the asset, quality control personnel, and site security.1Internal Revenue Service. Section 263A Costs for Self-Constructed Assets
Only the portion of an employee’s time actually spent on the project gets capitalized. If a project manager devotes 60% of the year to overseeing new facility construction and 40% to routine maintenance of existing buildings, 60% of that manager’s compensation goes into the asset’s basis and 40% remains an immediate deduction. Careful timekeeping is where most companies run into trouble during audits.
The capitalized labor increases the asset’s depreciable basis. A facility that cost $10 million in materials plus $2 million in capitalized internal labor has a $12 million basis, all of which gets depreciated over the applicable recovery period.
Manufacturing and Inventory Production
Manufacturers and producers face a similar rule, but the labor gets capitalized into inventory rather than into a fixed asset. Production workers’ wages become part of the cost of goods sitting in the warehouse. Those costs only hit the income statement when the inventory is sold, as cost of goods sold.
The governing rules are the Uniform Capitalization rules, commonly called UNICAP, in Section 263A. UNICAP requires any taxpayer who produces tangible personal property or acquires property for resale to capitalize direct costs and an allocable share of indirect costs into the property’s basis.2Office of the Law Revision Counsel. 26 USC 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses
Direct labor is the easy piece: wages paid to workers on the production line get capitalized in full. UNICAP also sweeps in indirect labor that supports production. The IRS specifically requires capitalization of labor costs tied to purchasing, materials handling, warehousing, quality control, and inspection.1Internal Revenue Service. Section 263A Costs for Self-Constructed Assets Officer compensation and employee benefit expenses allocable to production activities are included as well.3eCFR. 26 CFR 1.263A-1 – Uniform Capitalization of Costs
Labor for functions with nothing to do with production or acquisition stays immediately deductible. Corporate accounting, marketing, and sales staff all generate current-period expenses. The line falls between employees whose work touches the product or its acquisition process and those whose work is purely administrative or sales-oriented.
The practical headache is allocation. A warehouse manager might oversee both incoming raw materials (a production cost) and outgoing shipments to customers (a selling cost). Companies must maintain detailed labor records and apply allocation methods to carve up mixed-function employees’ compensation. Getting this wrong is one of the most common UNICAP audit adjustments.
Small Business Escape Hatch
Not every business has to deal with UNICAP. Section 263A contains an exemption tied to the gross receipts test under Section 448(c). If your average annual gross receipts over the three prior tax years fall below the inflation-adjusted threshold, you are not required to capitalize indirect costs under UNICAP.2Office of the Law Revision Counsel. 26 USC 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses Tax shelters are excluded from this exemption regardless of size.
The threshold was $30 million for 2024 and $31 million for 2025; the 2026 figure appears in the IRS’s annual revenue procedure. Below the threshold, you can treat production labor as a current expense without running it through UNICAP’s allocation formulas, though you still need to account for direct material and labor costs in inventory under general tax accounting principles.
Internal-Use Software Development
Building or significantly customizing software for your own company’s use is one of the most common modern triggers for salary capitalization. Under ASC 350-40, the labor costs of developers, software engineers, and testers working on an internal-use software project create an intangible asset on the balance sheet, which is then amortized over the software’s estimated useful life.
Under the current rules, which remain in effect for most companies through 2027, the project lifecycle breaks into three phases:
- Preliminary project stage. Researching alternatives, evaluating vendors, deciding on an approach. All labor during this phase is expensed immediately.
- Application development stage. Coding, configuration, integration work, and testing. Labor during this phase must be capitalized. Every developer hour spent writing and testing code gets added to the asset’s cost.
- Post-implementation stage. Training users, applying patches, and performing routine maintenance after the software goes live. Labor here is expensed immediately because maintenance doesn’t create new future economic value.
The same framework applies to implementation costs for cloud computing arrangements like SaaS platforms. If your employees spend time on custom configuration, system integration, or coding needed to get a cloud-based system running, those hours during the equivalent of the application development stage are capitalized even though you don’t own the underlying software.
The Shift Under ASU 2025-06
In September 2025, the FASB issued ASU 2025-06, which replaces the three-stage framework with a principles-based approach. Companies will capitalize software costs once two conditions are met: management has authorized and committed to funding the project, and it is probable the project will be completed and used as intended.4Deloitte. Heads Up – FASB Amends Guidance on the Accounting for and Disclosure of Software Costs Projects involving novel or unproven features that create real uncertainty about completion would not qualify for capitalization until those uncertainties are resolved.
ASU 2025-06 takes effect for fiscal years beginning after December 15, 2027, with early adoption permitted. Through 2026 and most of 2027, the three-stage model still governs financial reporting.
Research and Development Salaries
R&D spending has its own capitalization rules under Section 174, and recent legislation has changed the picture considerably.5Office of the Law Revision Counsel. 26 USC 174 – Amortization of Research and Experimental Expenditures
From 2022 through 2024, the Tax Cuts and Jobs Act forced businesses to capitalize all research and experimental expenditures and amortize them over five years for domestic work or fifteen years for foreign work. That delayed the tax benefit of researcher salaries by years.
The One Big Beautiful Bill Act, signed into law on July 4, 2025, reversed this for domestic research. Under new Section 174A, businesses can once again immediately deduct domestic research and experimental expenditures for tax years beginning after December 31, 2024. The change is permanent. The fifteen-year amortization requirement still applies to research performed outside the United States, so companies with offshore R&D teams continue to face mandatory capitalization of those labor costs.
The Book-Tax Gap on Software Salaries
Section 174 explicitly classifies software development costs as research and experimental expenditures, regardless of whether the software is for internal use or for sale. This creates a book-tax difference that catches many companies off guard. For financial reporting under GAAP, internal-use software follows ASC 350-40 capitalization. For federal tax, those same developer salaries are Section 174 expenditures, which for domestic work are now immediately deductible.
The practical result for 2026: your developers’ salaries might be capitalized on your GAAP financial statements while being fully deducted on your tax return. Both treatments are correct, and the temporary difference gets tracked as a deferred tax item. Companies that miss the distinction often either overcapitalize on the tax return (losing a current deduction) or underreport income on the financial statements.
What Happens If You Get It Wrong
Misclassifying labor that should be capitalized as an immediate expense reduces your taxable income in the current year and overstates your deductions. From the IRS’s perspective, that is an underpayment, and it triggers the accuracy-related penalty under Section 6662: a flat 20% added to the portion of the underpayment attributable to negligence or disregard of the rules.6Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
Negligence includes any failure to make a reasonable attempt to comply with the code. Improperly expensing $500,000 in foreign developer salaries that should have been capitalized under Section 174 can generate a five-figure penalty on top of the tax owed, plus interest running from the original due date. The IRS does not need to prove intent; carelessness is enough.
Documentation is the main defense. Detailed time-tracking records showing how employee hours were allocated across capitalizable and non-capitalizable activities put you in a far stronger position during an audit than rough estimates or after-the-fact reconstruction. For software projects in particular, inadequate records often lead auditors to disallow capitalization entirely, forcing the entire cost into a single year’s expense and creating a mismatch that draws further scrutiny.