Depreciation Calculator
The following calculator is for depreciation calculation in accounting. It takes the straight line, declining balance, or sum of the year' digits method. If you are using the double declining balance method, just select declining balance and set the depreciation factor to be 2. It can also calculate partial-year depreciation with any accounting year date setting.
Depreciation
In simple terms, depreciation means an asset loses value as it ages, mainly because of wear and use. For example, a machine that builds widgets is considered depreciated if it outputs fewer units this year than last, just as a car’s market price drops after an accident or a broken transmission.
From an accounting perspective, depreciation spreads the purchase price of an asset across its expected service life. Buying a costly piece of equipment would otherwise cause a sudden spike in expenses on the income statement, but by allocating the cost over several years the impact is softened. In the United States, these depreciation charges can be deducted for tax purposes.
Methods of Depreciation
Several techniques exist for apportioning depreciation throughout an asset’s life; the most common ones are listed below. Regardless of the chosen method, the cumulative depreciation will equal the asset’s cost by the end of its useful life—the difference lies in when the expense is recognized. Note that accelerated approaches like declining‑balance or sum‑of‑the‑years‑digits front‑load the deduction, lowering early‑period profit and boosting it later, which can affect cash‑flow statements.
Straight-Line Depreciation Method
The straight‑line method is the simplest and most popular way to depreciate an asset. It allocates an equal portion of the asset’s cost to each year of its useful life. The formula is shown below:
| Depreciation per year = |
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Declining Balance Depreciation Method
Certain assets lose value quickly when they’re brand‑new, with the rate slowing as they age. In such cases, the declining‑balance technique usually mirrors the actual book value more closely than the straight‑line approach.
Depreciation per year = Book value × Depreciation rate
The double‑declining‑balance method is the most common variant of declining‑balance depreciation. It applies a rate that is double the straight‑line rate for the first year, so you multiply the straight‑line factor by two in your calculations. This approach ignores salvage value when computing the yearly expense, although depreciation ceases once the asset’s book value reaches the salvage amount.
Sum of the Years' Digits Depreciation Method
Like the declining‑balance method, the sum‑of‑the‑years’‑digits (SYD) technique accelerates depreciation in the early years of an asset’s life. It often suits assets that generate most of their output early on and then taper off, making it a better fit than straight‑line for such situations.
| Depreciation for the Year = (Asset Cost - Salvage Value) × factor | ||||
| 1st year: factor = |
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| 2nd year: factor = |
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| 3rd year: factor = |
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| last year: factor = |
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| n is the asset's useful life in years. | ||||
Units of Production Depreciation Method
With this method, the depreciation is expressed by the total number of units produced vs. the total number of units that the asset can produce.
| Depreciation per year = |
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Partial Year Depreciation
Assets are not always acquired at the start of a fiscal year, which complicates depreciation calculations. Various accounting standards handle mid‑year acquisitions differently. One approach, called partial‑year depreciation, computes depreciation from the exact date the asset enters service. To apply this in the calculator, just choose “Yes.”
Salvage Value
When discussing depreciation, the salvage (or residual) value represents the projected amount an asset can be sold for after its useful life ends. If you know this figure—say, the price of selling the asset for parts—you subtract it from the original cost to determine the depreciable base. When there is no salvage value, the full purchase price is depreciated.