Capitalize a material cost when it becomes part of inventory you’ll sell later or creates a benefit that lasts beyond the current tax year; expense it when the material is consumed right away or qualifies for a safe harbor. That’s the whole rule for deciding when to capitalize vs. expense material costs, and the rest is applying it to the specific purchase in front of you. Getting it wrong shifts taxable income into the wrong year and can bring IRS penalties and restatements.
What “Material Cost” Actually Includes
Direct materials are the physical inputs that become part of a finished product: a furniture maker’s lumber, a bakery’s flour, an assembler’s circuit boards. These are traceable to specific units of production, which is what sets them apart from general overhead.
The cost isn’t just the invoice price. Freight, import duties, and handling fees to get materials to your facility are part of “landed cost,” and they get folded into the inventory value rather than deducted separately as operating expenses.
General operating costs like office rent, utilities, and administrative salaries are indirect. Because they can’t be traced to a specific product, they’re normally deducted in the period paid. The exception is the UNICAP rules for larger producers, covered below.
The Core Rule: Long-Term Benefit vs. Used Up Now
If a cost creates a benefit that extends past this year, capitalize it. If the benefit is used up within the year, expense it. Capitalizing means the cost sits on your balance sheet as an asset; expensing means it hits your income statement immediately.
Materials purchased for inventory are always capitalized. They stay on the balance sheet until the finished product sells, at which point they convert into Cost of Goods Sold. Equipment and machinery follow the same logic: the purchase price is capitalized and recovered over time through depreciation, reported on IRS Form 4562.1Internal Revenue Service. About Form 4562, Depreciation and Amortization
Supplies consumed immediately in delivering a service, like cleaning chemicals used by a janitorial crew or paper used in an office, are expensed in full when purchased. The practical effect of capitalization is a timing difference: expensing gives you the full deduction now, while capitalizing spreads it out or delays it until the asset sells.
Spending on Property You Already Own
The hardest capitalization calls come up when you spend money on property already in service. A new roof on the warehouse. An engine overhaul on a delivery truck. Rewiring the office. The IRS tangible property regulations require capitalization of any expenditure that improves a unit of property, and they define “improvement” through three tests.2Internal Revenue Service. Tangible Property Final Regulations – Frequently Asked Questions
- Betterment: the work fixes a pre-existing defect, adds to the property’s size or capacity, or materially increases its productivity, efficiency, or output.
- Restoration: the work replaces a major component or substantial structural part, returns property that has deteriorated beyond use to working condition, or rebuilds it to like-new condition after the end of its class life.
- Adaptation: the work converts the property to a new or different use from what you originally intended when you placed it in service.
Hit any one of the three and you must capitalize. Fail all three and the work is generally a currently deductible repair. This is where most disputes with the IRS happen. Capitalizing a $50,000 roof replacement spreads the deduction over decades; expensing a $50,000 repair takes it all this year.
Safe Harbors That Let You Expense Anyway
Even when a cost looks like it should be capitalized, two safe harbors can move it back into the current-year deduction column.
De Minimis Safe Harbor
Businesses without an applicable financial statement (most small businesses) can elect to expense any item costing $2,500 or less per invoice. If your business has audited financial statements prepared under GAAP, the threshold is $5,000 per invoice.3Internal Revenue Service. Tangible Property Final Regulations – Frequently Asked Questions – Section: A De Minimis Safe Harbor Election You need a written accounting policy in place at the start of the tax year and you make the election annually on your return.
This is useful for items like laptops, small tools, and office furniture that technically have multi-year lives but aren’t worth tracking as depreciable assets. Without the election, a $2,000 desk would be capitalized and depreciated over seven years.
Routine Maintenance Safe Harbor
Recurring maintenance that keeps property in ordinary working condition can be expensed even when the dollar amount is significant. The key test: when the property was first placed in service, you must have reasonably expected to perform the maintenance more than once during the property’s class life. For buildings and building systems, the window is more than once during the first ten years.4Internal Revenue Service. Tangible Property Final Regulations – Frequently Asked Questions – Section: Safe Harbor for Routine Maintenance
Inspections, cleaning, oil changes, and filter replacements qualify. The safe harbor does not apply if the work constitutes a betterment. Replacing a worn brake pad is routine; upgrading to a higher-performance braking system is a betterment that must be capitalized.
Faster Recovery When You Must Capitalize
Even when capitalization is unavoidable, two provisions let you recover the cost far faster than standard depreciation.
Section 179 Expensing
Section 179 lets you deduct the full purchase price of qualifying equipment, machinery, vehicles, and certain other tangible property in the year you place it in service. For 2026, the maximum deduction is $2,560,000, phasing out dollar-for-dollar once total qualifying purchases for the year exceed $4,090,000. Sport utility vehicles face a separate $32,000 cap.5Internal Revenue Service. Rev. Proc. 2025-32 – Section 4.24 These figures are adjusted for inflation each year.6Office of the Law Revision Counsel. 26 USC 179 – Election to Expense Certain Depreciable Business Assets
A bakery buying a $180,000 commercial oven can deduct the entire cost in the year it starts using the oven rather than spreading the deduction across a depreciation schedule.
100 Percent Bonus Depreciation
The One Big Beautiful Bill Act permanently restored 100 percent first-year bonus depreciation for qualified property acquired after January 19, 2025.7Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill The phase-down schedule that had been reducing the percentage each year is gone, and so is the previous placed-in-service sunset.8Internal Revenue Service. IRS Notice 2026-11 – Interim Guidance on Additional First Year Depreciation Deduction
Bonus depreciation has no dollar cap and isn’t limited by taxable income. It applies to new and most used property, as long as it’s new to you. Businesses whose capital spending exceeds the Section 179 limits can use bonus depreciation for the rest in the same year.
UNICAP: When Overhead Gets Capitalized Too
Manufacturers, producers, and certain resellers face an extra layer under Section 263A, known as the UNICAP rules. These require capitalizing not just direct materials but also a share of indirect costs that support production, including factory rent, utilities, equipment depreciation, insurance, and storage.9Office of the Law Revision Counsel. 26 USC 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses
Costs that would otherwise be deducted as overhead must instead be allocated to inventory and held there until the products sell. The purpose is to keep businesses from deducting production-related overhead immediately while the inventory those costs helped create sits unsold.
Small businesses are exempt. If your average annual gross receipts for the prior three years fall below the Section 448(c) threshold, UNICAP does not apply.9Office of the Law Revision Counsel. 26 USC 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses That threshold is adjusted for inflation each year and has been approximately $30 million in recent years; check the most recent IRS revenue procedure for the exact figure for your tax year. Businesses under the line can generally deduct indirect production costs as incurred.
Fixing a Prior Misclassification
If you’ve been expensing costs that should have been capitalized, or capitalizing costs that qualify for immediate deduction under a safe harbor, you correct the treatment prospectively by filing Form 3115. The form requests IRS consent to change your accounting method and computes a Section 481(a) adjustment that captures the cumulative difference between the old and new methods.
Most capitalization-related changes qualify for automatic consent, which means no user fee and no need to wait for a ruling, though the IRS retains review rights.10Internal Revenue Service. Instructions for Form 3115 – Application for Change in Accounting Method Changes that don’t qualify for automatic consent require advance permission from the IRS National Office, with a user fee and a longer timeline. Qualified small taxpayers may complete only specific sections of the form. Filing under the wrong procedure can void the consent and leave you exposed to penalties on returns already filed.