Asset Depreciation Calculator Online
Depreciation Calculator
Depreciation Parameters
Depreciation allocates the cost of a fixed asset over its useful life, spreading the expense across the periods that benefit from the asset. This calculator computes depreciation schedules using the most common methods: straight-line, declining balance, double declining balance, and sum of years digits. The right method depends on your tax strategy and the asset's actual pattern of use.
Depreciation Methods
Different depreciation methods produce different expense amounts in each year, affecting taxable income and reported profit. Accelerated methods (double declining, sum of years digits) front-load expenses, reducing taxable income more in early years. Straight-line is simplest and most common for financial reporting.
Straight-Line: (Cost - Salvage) / Useful Life Double Declining Balance: (2 / Useful Life) × Book Value Sum of Years Digits: (Cost - Salvage) × Remaining Life / Sum of Digits
Sum of digits for a 5-year asset = 5+4+3+2+1 = 15. Year 1 depreciation = 5/15 of depreciable cost.
Tax Depreciation (MACRS and Bonus)
For U.S. tax purposes, the IRS specifies depreciation using the Modified Accelerated Cost Recovery System (MACRS), which assigns assets to recovery period classes (5-year, 7-year, etc.) and requires specific depreciation percentages. Section 179 and bonus depreciation allow immediate expensing of qualified assets, reducing taxes in the year of purchase.
| Method | Front-Loads Expense? | Best For |
|---|---|---|
| Straight-Line | No | Financial reporting, simple assets |
| Double Declining | Yes | Assets that lose value quickly (vehicles) |
| MACRS | Yes | U.S. tax depreciation (required) |
| Section 179/Bonus | Maximum (immediate) | Small business tax planning |
Frequently Asked Questions
What is straight-line depreciation?⌄
Straight-line depreciation deducts the same amount each year over the asset's useful life. It is the simplest method: (Cost - Salvage Value) / Useful Life Years. A $10,000 machine with $1,000 salvage value and 5-year life depreciates at $1,800/year.
What is the difference between depreciation and amortization?⌄
Depreciation applies to tangible assets (equipment, buildings, vehicles). Amortization applies to intangible assets (patents, software, goodwill, loan origination costs). Both spread the cost over useful life, but the terms are used specifically for their respective asset types.
Can I depreciate land?⌄
No. Land is not depreciable because it does not wear out or become obsolete. Only the building on the land can be depreciated. When you purchase real estate, you must allocate the purchase price between land (non-depreciable) and building (depreciable) for tax purposes.
What happens when an asset is fully depreciated?⌄
A fully depreciated asset has a book value equal to its salvage value (or zero if no salvage value was assigned). It can still be used in the business, just no more depreciation is taken. When sold, any proceeds above book value are a taxable gain (depreciation recapture), which may be taxed at ordinary income rates rather than capital gains rates.