To calculate net long-term assets, add together the cost basis of everything your business owns that will last beyond one year, then subtract the depreciation and amortization already recorded against those items. The result, called net book value, is what appears in the noncurrent section of your balance sheet. The formula is straightforward; the work is in getting each input right.
Net Long-Term Assets = (Gross Tangible Assets + Intangible Assets + Long-Term Investments) − (Accumulated Depreciation + Accumulated Amortization)
What Counts as a Long-Term Asset
A long-term asset, known in accounting as a noncurrent asset, is anything your business holds that won’t convert to cash or get used up within a single year. Three categories cover almost everything you’ll list.
Tangible assets are the physical items used in operations: land, buildings, machinery, vehicles, and furniture. Accountants group these under property, plant, and equipment. Every item in this group except land loses value over time through depreciation.
Intangible assets are rights or advantages without a physical form. Goodwill from an acquisition, patents, trademarks, copyrights, customer lists, and franchise agreements all belong here. Intangibles lose book value through amortization rather than depreciation.
Long-term financial investments include stocks, bonds, and real estate you plan to hold for more than a year, along with items like bond sinking funds and the cash surrender value of life insurance. Deferred charges and deferred tax assets that won’t become cash in the near term sit in this section too.
One item that catches people off guard is the right-of-use asset created by a long-term lease. Under current accounting standards, if your business leases equipment or office space for more than 12 months, you record both an asset and a matching liability. That lease asset sits alongside owned property in the noncurrent section and enters the calculation the same way.
Build the Cost Basis for Each Asset
Cost basis is the total you spent to acquire an asset and prepare it for use. It is not just the purchase price. The IRS requires you to capitalize several costs that people often think of as separate expenses.
For equipment and personal property, cost basis includes the purchase price plus sales tax, freight, installation, and testing expenses. If employees built or assembled the asset in-house, you must include their wages (reduced by any employment credits), depreciation on equipment used during construction, and the supplies and materials consumed.
For real property, the list is longer. Settlement fees such as title insurance, survey costs, transfer taxes, recording fees, and legal fees for the title search and deed preparation all become part of the basis. Any back taxes or other seller obligations you agreed to cover at closing get added in as well.
Capital improvements made after purchase also increase basis. If you add a new roof to your warehouse or retrofit a production line, those costs are capitalized and depreciated alongside the original asset rather than deducted immediately. Keep the invoices and record each improvement with its date of service in your fixed asset ledger.
Subtract Depreciation on Tangible Property
Depreciation is the annual reduction in a tangible asset’s book value to reflect wear, age, and obsolescence. For tax purposes, most businesses use the Modified Accelerated Cost Recovery System (MACRS), which assigns each asset to a recovery-period class based on what it is rather than how long you personally expect to use it.
The standard MACRS recovery periods are:
- 3-year property: certain manufacturing tools, racehorses, and rent-to-own consumer goods
- 5-year property: computers, office equipment, automobiles, and light trucks
- 7-year property: office furniture, fixtures, and most general-purpose machinery
- 15-year property: land improvements like sidewalks, fences, and parking lots
- 27.5 years: residential rental buildings
- 39 years: commercial buildings and other nonresidential real property
Within these classes, the General Depreciation System applies one of three methods: 200-percent declining balance for most personal property, 150-percent declining balance for certain farm and utility assets, or straight-line for buildings and any asset where you elect it. The declining-balance methods produce larger deductions in the early years and smaller ones later, front-loading the tax benefit.
One MACRS rule to remember: salvage value is ignored. You depreciate the entire cost basis down to zero over the recovery period.
To compute accumulated depreciation for the calculation, add together every year of depreciation booked on the asset since it was placed in service. That running total is what you subtract from cost basis to reach the net figure for each item.
Subtract Amortization on Intangibles
Intangible assets acquired in connection with a business are generally amortized over a straight 15-year period under Section 197 of the tax code, regardless of how long the asset actually lasts. This 15-year rule covers goodwill, going-concern value, workforce in place, customer lists, patents, copyrights, trademarks, trade names, government licenses, covenants not to compete, and franchise agreements. Divide the acquisition cost by 180 months and deduct that amount each month, starting in the month of acquisition.
The 15-year period applies even when the underlying right has a different legal life. A patent might last 20 years and a copyright might outlast the owner by decades, but if either was acquired as part of a business purchase, you amortize over 15 years. Self-created intangibles, such as a patent your own R&D team developed, follow different rules and are often not Section 197 property at all.
Carry Long-Term Investments at the Right Value
Long-term financial investments are generally carried at fair market value or amortized cost, not depreciated. Add their carrying value directly to the gross-asset side of the formula. Mixing these up with depreciable property is one of the most common sources of a wrong net figure.
A Worked Example
Suppose a company owns machinery with a total cost basis of $500,000 and has taken $175,000 in depreciation to date. It holds a trademark acquired for $60,000 with $16,000 of amortization recorded. It also holds $80,000 in long-term bond investments.
Net long-term assets = ($500,000 + $60,000 + $80,000) − ($175,000 + $16,000) = $449,000.
Depreciation applies only to the tangible portion. Amortization applies only to the intangible portion. Investments are neither depreciated nor amortized. Apply the subtractions the same way every reporting period; switching methods or skipping a quarter creates discrepancies that compound and misrepresent your actual net worth to creditors and buyers.
Assets That Never Enter the Calculation
Not every long-term purchase reaches the balance sheet. Three provisions let businesses deduct the full cost of qualifying items in the year they’re placed in service, which means those items never appear in your gross-asset total or generate accumulated depreciation.
Section 179 Expensing
Section 179 allows a business to deduct immediately the cost of qualifying equipment, software, and certain improvements rather than depreciating them over years. The statutory base limit is $2,500,000 per year, with an inflation adjustment bringing the 2026 cap to roughly $2,560,000. The deduction phases out dollar-for-dollar once total qualifying property placed in service during the year exceeds $4,000,000 (roughly $4,090,000 for 2026). The Section 179 deduction cannot exceed your taxable business income for the year, though unused amounts carry forward.
Married taxpayers filing separate returns split the limit equally unless they elect otherwise. Large sport utility vehicles have their own separate cap of $25,000.
Bonus Depreciation
Bonus depreciation lets you deduct a percentage of a qualifying asset’s cost in its first year, on top of regular MACRS depreciation. For 2026, eligible property qualifies for 100-percent bonus depreciation, meaning the entire cost can be written off immediately. Bonus depreciation has no dollar cap and no business-income limitation, though it can create or increase a net operating loss.
De Minimis Safe Harbor
The de minimis safe harbor lets you expense items costing $2,500 or less per invoice ($5,000 if your business has audited financial statements or files with the SEC). You need a written accounting policy in place before the start of the tax year requiring you to expense these amounts, and you must actually treat them that way on your books.
Anything fully expensed under these provisions stops appearing in the net long-term asset calculation from that year forward.
When an Asset Loses Value Suddenly: Impairment
Depreciation spreads cost evenly over time, but sometimes an asset’s real value drops all at once. Specialized machinery becomes obsolete, a major contract falls through, or market conditions crater the value of a property. When events like these suggest a long-term asset may not be worth what your books say, you have to test for impairment.
The test has two steps. First, compare the asset’s carrying amount (cost minus accumulated depreciation) against the total undiscounted future cash flows you expect it to generate. If the cash flows exceed the book value, the asset passes and no write-down is needed. If they fall short, measure the asset’s fair market value and record an impairment loss equal to the difference between the carrying amount and that fair value.
Impairment losses reduce net long-term assets immediately and flow through to the income statement. For assets held and used, they are not reversible, so this is a permanent reduction in your reported asset base. For tax purposes, losses on abandoned or worthless business property are deductible in the year the loss is sustained, provided the loss isn’t compensated by insurance, and the deduction is based on the asset’s adjusted basis at that time.
Where the Number Lands on Your Balance Sheet
Net long-term asset figures go in the noncurrent assets section of the balance sheet, below current assets like cash and receivables. Each category gets its own line: property, plant, and equipment net of accumulated depreciation; intangible assets net of amortization; and long-term investments at their carrying value. This layout lets anyone reading the statement see quickly how much lasting infrastructure the business holds versus how much has already been consumed.
These figures feed directly into the fundamental accounting equation: total assets equal total liabilities plus equity. A misclassification or a missed depreciation entry throws the entire balance sheet out of balance, so reconcile your fixed asset ledger against a physical inventory at least once a year and confirm that every item’s cost basis, placed-in-service date, recovery period, and cumulative depreciation match the numbers flowing into the calculation.