Asset Depreciation Calculator
Calculate depreciation using straight-line, declining balance, or MACRS methods.
Formula
Straight-Line: Annual Depreciation = (Cost − Salvage Value) / Useful Life Declining Balance: Depreciation = Book Value × (2 / Useful Life) MACRS: Depreciation = Cost × MACRS Percentage for Year
How to Calculate
Depreciation allocates the cost of a tangible asset over its useful life. The simplest method is straight-line: subtract the salvage value from the purchase cost and divide by the useful life in years. This produces equal annual depreciation expenses.
Double-declining balance (DDB) is an accelerated method that front-loads depreciation. Multiply the asset's book value (cost minus accumulated depreciation) by twice the straight-line rate. This produces larger deductions in early years and smaller ones later. DDB is useful for assets that lose value quickly, like technology equipment.
For US tax purposes, most businesses use MACRS (Modified Accelerated Cost Recovery System), which specifies depreciation percentages for each year based on asset class. Common classes include 5-year (computers, vehicles), 7-year (office furniture, equipment), and 39-year (commercial buildings). MACRS uses the half-year convention, meaning only half a year of depreciation is taken in the first and last year.
Worked Example
A business purchases a $30,000 delivery van with a 5-year useful life and $5,000 salvage value.
Straight-Line: Annual depreciation: ($30,000 − $5,000) / 5 = $5,000/year Year 1: $5,000 → Book value $25,000 Year 2: $5,000 → Book value $20,000 ... Year 5: $5,000 → Book value $5,000 (salvage value)
MACRS (5-year property, half-year convention): Year 1: $30,000 × 20.00% = $6,000 Year 2: $30,000 × 32.00% = $9,600 Year 3: $30,000 × 19.20% = $5,760 Year 4: $30,000 × 11.52% = $3,456 Year 5: $30,000 × 11.52% = $3,456 Year 6: $30,000 × 5.76% = $1,728
Why It Matters
Depreciation is a non-cash expense that reduces taxable income, directly lowering your tax bill. Choosing the right depreciation method can significantly impact your tax liability and cash flow, especially in the early years of an asset's life. For tax planning, accelerated methods like MACRS or Section 179 expensing let you deduct more upfront, improving cash flow when you need it most.
Practical Tips
- ✓Consider Section 179 expensing to deduct the full cost of qualifying assets in the year of purchase (up to $1.16 million in 2024).
- ✓Use bonus depreciation (currently 60% for 2024) for additional first-year deductions on new and used assets.
- ✓Keep detailed records of purchase date, cost, and asset class for every depreciable asset.
- ✓Review the MACRS asset class tables to ensure you are using the correct useful life for tax purposes.
Frequently Asked Questions
What is the difference between depreciation and amortization?
What is Section 179 expensing?
Can I depreciate used equipment?
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