What Is a Depreciation Calculator?
A depreciation calculator estimates how an asset's value declines over its useful life for accounting purposes, using either the straight-line method (equal amounts each year) or the double-declining balance method (larger deductions early, smaller later).
How to Use the Depreciation Calculator
- Enter the asset's original cost.
- Enter its estimated salvage (residual) value at the end of its useful life.
- Enter the useful life in years.
- Choose straight-line or double-declining balance method.
Depreciation Formulas
Worked Example
Annual depreciation: ($25,000 − $5,000) ÷ 5 = $4,000 per year
Book value after year 1: $25,000 − $4,000 = $21,000
Understanding Your Results
Straight-Line spreads depreciation evenly across the asset's useful life — simple and predictable. Double-Declining Balance is an accelerated method that front-loads larger depreciation deductions in early years, often used when an asset loses value or usefulness faster early on (like vehicles or technology).
Common Uses for Depreciation
- Business accounting and financial statement preparation.
- Tax deductions for business asset purchases (consult a tax professional for specific tax depreciation rules, which can differ from book depreciation).
- Estimating an asset's current book value for resale or insurance purposes.
Common Mistakes to Avoid
- Confusing book depreciation (used here) with tax depreciation methods (like MACRS), which follow specific IRS rules and schedules.
- Depreciating an asset below its salvage value.
- Using an unrealistic useful life estimate that doesn't reflect how the asset is actually used.
Frequently Asked Questions
Straight-line spreads depreciation evenly over the asset's life. Double-declining balance front-loads larger deductions in early years, tapering off later — useful for assets that lose value or usefulness faster upfront.
It's the estimated value of an asset at the end of its useful life — what you might sell or scrap it for.
No — this shows standard book depreciation methods for accounting purposes. Tax depreciation (like MACRS in the US) follows specific IRS schedules that may differ significantly; consult a tax professional for tax filing purposes.
No — properly calculated depreciation should stop once book value reaches salvage value, which this calculator accounts for in the double-declining method.
Vehicles, machinery, equipment, buildings, and other long-term business assets are commonly depreciated for accounting and tax purposes.