📉 Accumulated Depreciation Calculator
Calculate accumulated depreciation and net book value using straight-line or declining balance method.
Depreciation Methods Explained
Accumulated depreciation is the total depreciation recognized on an asset since it was placed in service. It appears on the balance sheet as a contra-asset, reducing the gross asset value to the net book value. Three methods are commonly used: Straight-Line spreads cost evenly; Double Declining Balance front-loads depreciation (useful for technology assets); and Sum-of-Years-Digits provides a middle ground between the two.
Straight-Line vs Declining Balance: Which to Use?
Straight-line is simplest and most common for financial reporting under GAAP. It works best for assets that provide relatively even utility over their life — buildings, furniture, equipment. Double declining balance (DDB) better matches the economic reality of assets that lose value rapidly early on — vehicles, computers, software. For tax purposes, most US businesses use MACRS (Modified Accelerated Cost Recovery System), which is a form of declining balance that switches to straight-line when that produces a higher deduction.
People Also Ask
Accumulated depreciation is a contra-asset account that offsets the gross cost of fixed assets. If equipment cost $50,000 and has $20,000 of accumulated depreciation, the net book value is $30,000. It is not cash — it represents the portion of the asset's cost already recognized as an expense.
No — accumulated depreciation is capped at the depreciable cost (asset cost minus salvage value). Once fully depreciated, the asset remains on the books at its salvage value until disposed of.
Depreciation reduces taxable income. For tax purposes, bonus depreciation (up to 60% in 2024, phasing down) and Section 179 expensing allow businesses to deduct large portions of asset cost in the year of purchase rather than spreading it over the asset's life, providing an immediate tax benefit.
Depreciation Methods
| Method | Best For |
|---|---|
| Straight-Line | Uniform use assets (buildings, furniture) |
| Double Declining | Assets that lose value quickly (vehicles, tech) |
| Sum of Years Digits | Assets with higher early productivity |