ganak.appDepreciation Calculator
Calculate asset depreciation using straight-line, double declining balance, and sum-of-years'-digits methods. View year-by-year schedules, compare methods, and understand book value decline.
Depreciation Schedule
Year-by-year breakdown of asset depreciation
| Year | Beginning Value | Depreciation | Accumulated | Ending Value |
|---|---|---|---|---|
| 1 | $50,000 | $9,000 | $9,000 | $41,000 |
| 2 | $41,000 | $9,000 | $18,000 | $32,000 |
| 3 | $32,000 | $9,000 | $27,000 | $23,000 |
| 4 | $23,000 | $9,000 | $36,000 | $14,000 |
| 5 | $14,000 | $9,000 | $45,000 | $5,000 |
| Total | — | $45,000 | — | — |
What is Depreciation?
Understanding how assets lose value over time
Depreciation is an accounting method that allocates the cost of a tangible asset over its useful life. It reflects the wear and tear, obsolescence, or reduction in value that an asset experiences as it ages and is used in business operations.
Businesses use depreciation to spread the cost of expensive assets — such as machinery, vehicles, equipment, and buildings — across multiple accounting periods rather than recording the entire expense in the year of purchase. This provides a more accurate picture of expenses and profitability.
Depreciation also has significant tax implications. In most jurisdictions, depreciation expense is tax-deductible, reducing taxable income and thereby lowering the tax burden. The choice of depreciation method can meaningfully affect the timing of tax deductions.
Depreciation Methods & Formulas
The four most common methods for calculating depreciation
1. Straight-Line Depreciation (SL)
The simplest and most widely used method. It allocates an equal amount of depreciation each year over the asset's useful life.
2. Double Declining Balance (DDB)
An accelerated method that front-loads depreciation expense. It applies twice the straight-line rate to the declining book value each year, switching to straight-line when that produces a larger deduction.
3. Sum-of-the-Years'-Digits (SYD)
Another accelerated method where depreciation is highest in the first year and decreases steadily. The "sum of years" for a 5-year asset is 1+2+3+4+5 = 15.
4. Declining Balance (DB)
A flexible accelerated method where you choose the declining rate (commonly 150% or 200%). A 200% rate uses the same annual rate as DDB, but without the automatic switch to straight-line in later years.
Understanding the Depreciation Schedule
What each column in the depreciation table means
Beginning Book Value
The asset's value at the start of each year. For year 1, this equals the original cost. For subsequent years, it equals the previous year's ending book value.
Depreciation Expense
The amount of value the asset loses during that year. This is the expense recorded on your income statement and used for tax deductions.
Accumulated Depreciation
The running total of all depreciation taken to date. This appears on the balance sheet as a contra-asset, reducing the asset's reported value.
Ending Book Value
The asset's value at the end of each year (Beginning Value minus Depreciation). For straight-line and SYD methods, the final year's ending value equals the salvage value. For declining balance methods, it may remain above salvage.
Common Depreciation Mistakes
Pitfalls to avoid when calculating asset depreciation
Setting salvage value to zero unnecessarily
Most assets have some residual value at the end of their useful life. Setting salvage value to zero overstates depreciation expense and can lead to inaccurate financial reporting.
Using the wrong useful life
The useful life should reflect how long the asset will actually be productive for your business, not just its physical lifespan. Tax authorities often publish standard useful life tables.
Not matching the method to the asset type
Accelerated methods (DDB, SYD) are better for assets that lose value quickly early on, like vehicles and technology. Straight-line works well for assets with consistent utility, like buildings.
Confusing depreciation with amortization
Depreciation applies to tangible assets (equipment, vehicles, buildings). Amortization applies to intangible assets (patents, copyrights, goodwill). The concepts are similar but apply to different asset types.
Forgetting partial-year adjustments
If an asset is purchased mid-year, the first year's depreciation should be prorated. Many businesses use a half-year convention, depreciating half a year's worth in the first and last years.
Real-World Example
Calculating depreciation for a delivery truck
Given
- Purchase price: $35,000
- Salvage value: $5,000
- Useful life: 5 years
- Method: Straight-Line
Result
- Depreciable amount: $30,000
- Annual depreciation: $6,000
- Depreciation rate: 17.14%
- Book value after 3 years: $17,000
Each year, the company records a $6,000 depreciation expense on its income statement and increases accumulated depreciation on the balance sheet by the same amount, reducing the truck's carrying value from $35,000 toward its $5,000 salvage value over 5 years.
Frequently Asked Questions
Common questions about depreciation calculation and methods