Depreciation Schedule Calculator
Enter your asset details and select a depreciation method to generate a full year-by-year schedule showing annual expense, accumulated depreciation, and remaining book value.
Depreciation Methods Explained
Straight-Line Depreciation
Formula
Annual Depreciation = (Cost - Salvage Value) / Useful Life
The simplest and most widely used method. It allocates an equal amount of depreciation each year, making it easy to forecast and budget. Best for assets that provide consistent utility over time, such as buildings, furniture, and office equipment.
Double Declining Balance (DDB)
Formula
Depreciation = (2 / Useful Life) x Beginning Book Value
An accelerated method that applies double the straight-line rate to the declining book value. In the final years, depreciation switches to straight-line to ensure the asset reaches salvage value by the end of its life. Best for assets that lose value quickly in early years, such as vehicles and technology.
Sum of Years Digits (SYD)
Formula
Depreciation = (Remaining Life / Sum of Years) x (Cost - Salvage Value)
Where Sum of Years = n(n+1)/2 for an n-year useful life. For example, a 5-year asset has a sum of 15 (5+4+3+2+1). Year 1 uses 5/15, Year 2 uses 4/15, and so on. Another accelerated method, but less aggressive than DDB.
Units of Production
Formula
Depreciation per Unit = (Cost - Salvage Value) / Total Estimated Units
Annual Depreciation = Depreciation per Unit x Units Produced That Year
Ties depreciation directly to usage rather than time. Ideal for manufacturing equipment, delivery vehicles (based on mileage), or any asset whose wear correlates with output. Results in variable annual expense that more accurately reflects actual asset consumption.
When to Use Each Method
| Method | Best For | Depreciation Pattern | Tax Impact |
|---|---|---|---|
| Straight-Line | Buildings, furniture, fixtures, assets with steady usage | Equal expense each year | Even tax deductions |
| Double Declining | Vehicles, computers, tech equipment that rapidly loses value | High early, low later | Larger early deductions |
| Sum of Years | Machinery, equipment with moderate early-life value loss | Gradually decreasing | Moderate acceleration |
| Units of Production | Manufacturing equipment, delivery vehicles, production machinery | Varies with usage | Matches revenue generation |
Common Asset Useful Life Reference
| Asset Type | Typical Useful Life | IRS MACRS Class |
|---|---|---|
| Computers and peripherals | 3-5 years | 5-year property |
| Office furniture and fixtures | 7-10 years | 7-year property |
| Vehicles (cars and trucks) | 5-6 years | 5-year property |
| Manufacturing equipment | 7-10 years | 7-year property |
| Office buildings | 39 years | 39-year property |
| Residential rental property | 27.5 years | 27.5-year property |
| Farm equipment | 5-7 years | 5 or 7-year property |
| Software | 3 years | 3-year property |
| Land improvements | 15 years | 15-year property |
| Appliances and carpeting | 5 years | 5-year property |
Note: MACRS (Modified Accelerated Cost Recovery System) is the U.S. tax depreciation system. Actual useful lives for book depreciation may differ from MACRS recovery periods. Consult a tax professional for specific guidance.
Frequently Asked Questions
What is depreciation?
Depreciation is the systematic allocation of the cost of a tangible asset over its useful life. Businesses use it to spread out the expense of purchasing an asset, matching the cost with the revenue the asset helps generate. It appears as an expense on the income statement and reduces the asset's value on the balance sheet.
What is the difference between book depreciation and tax depreciation?
Book depreciation is used for financial reporting and follows accounting standards (GAAP or IFRS). Companies choose the method that best reflects how the asset is consumed. Tax depreciation follows IRS rules (MACRS in the U.S.) and may use different useful lives and methods. The two systems often produce different annual amounts, creating temporary timing differences.
Can I change depreciation methods after I start?
Under GAAP, you can change methods if the new method better reflects the pattern of economic benefits. This is treated as a change in accounting estimate and applied prospectively. For tax purposes, changing methods requires IRS approval through Form 3115.
What is the depreciable base?
The depreciable base is the total amount that will be depreciated over the asset's life. It equals the asset cost minus the salvage value. For example, an asset costing $50,000 with a $5,000 salvage value has a depreciable base of $45,000.
Why does Double Declining Balance switch to Straight-Line?
DDB applies a fixed percentage to a declining book value, which means it never fully depreciates the asset on its own. To ensure the asset reaches salvage value by the end of its useful life, the method switches to straight-line in the year when straight-line would produce a larger expense on the remaining book value.
Does this calculator handle partial-year (mid-year) depreciation?
This calculator assumes full-year depreciation periods. For partial first-year calculations (such as the half-year convention used in MACRS), manual adjustments would be needed. The results here represent standard full-year calculations suitable for planning and comparison purposes.
Does this calculator store my data?
No. All calculations run entirely in your browser. No data is sent to any server, and nothing is stored.
Privacy & Limitations
Privacy: This calculator runs entirely in your browser. No financial data is transmitted or stored anywhere.
Limitations: This tool provides standard depreciation calculations for educational and planning purposes. It does not account for partial-year conventions, Section 179 deductions, bonus depreciation, or specific MACRS rules. It is not a substitute for professional accounting or tax advice.
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Depreciation Schedule Calculator FAQ
What is depreciation?
Depreciation is the systematic allocation of the cost of a tangible asset over its useful life. It reflects the decline in value of an asset due to wear and tear, obsolescence, or age. Businesses use depreciation to spread out the expense of an asset rather than recording the full cost in the year of purchase.
What is the Straight-Line depreciation method?
Straight-Line depreciation allocates an equal amount of depreciation expense each year over the asset's useful life. The formula is: Annual Depreciation = (Cost - Salvage Value) / Useful Life. It is the simplest and most commonly used method.
What is Double Declining Balance depreciation?
Double Declining Balance (DDB) is an accelerated depreciation method that applies twice the straight-line rate to the asset's declining book value each year. It front-loads depreciation expense, resulting in higher charges in early years and lower charges later. The formula is: Depreciation = 2 / Useful Life x Beginning Book Value.
What is Sum of Years Digits depreciation?
Sum of Years Digits (SYD) is an accelerated method that multiplies the depreciable base (cost minus salvage value) by a declining fraction each year. The fraction uses the remaining useful life as the numerator and the sum of all years as the denominator. For example, with a 5-year life, the sum is 15 (5+4+3+2+1), and year 1 uses 5/15.
When should I use accelerated depreciation?
Accelerated methods like DDB and SYD are appropriate when an asset loses most of its value in its early years, such as vehicles and technology equipment. They also provide larger tax deductions in early years, which can be beneficial for cash flow. Straight-line is better for assets that provide consistent utility over time, like buildings.
What is salvage value?
Salvage value (also called residual value or scrap value) is the estimated value of an asset at the end of its useful life. It represents what the asset could be sold for after it is fully depreciated. The depreciable amount is the cost minus the salvage value.
What is the Units of Production method?
The Units of Production method bases depreciation on actual usage rather than time. You divide the depreciable base by total estimated units the asset can produce, then multiply by actual units produced each year. This method is ideal for manufacturing equipment, vehicles (based on miles), or any asset whose wear is tied to output.
Does this calculator store my data?
No. All calculations run entirely in your browser. No data is sent to any server, and nothing is stored.