Depreciation Calculator — MACRS (200% DB) & Straight Line with Half-Year Convention
Calculate year-by-year depreciation schedules using Straight Line or MACRS (200% Declining Balance with half-year convention). See a bar chart of depreciation by year, an asset value decline line graph, and a full year-by-year schedule table.
Depreciation (MACRS/SL)
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Depreciation Method
Straight Line
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Annual Depreciation (Straight Line)
$9,000.00 / year
Total depreciation over life: $45,000.00
Depreciation Expense by Year
Year numbers below bars. Dollar amounts above each bar.
Asset Book Value Over Time
Year-by-Year Depreciation Schedule
| Year | Depreciation | Accumulated | Book Value |
|---|---|---|---|
| Year 1 | $9,000.00 | $9,000.00 | $41,000.00 |
| Year 2 | $9,000.00 | $18,000.00 | $32,000.00 |
| Year 3 | $9,000.00 | $27,000.00 | $23,000.00 |
| Year 4 | $9,000.00 | $36,000.00 | $14,000.00 |
| Year 5 | $9,000.00 | $45,000.00 | $5,000.00 |
Straight Line
Equal annual deduction. Simple and predictable. Best for book/GAAP financial reporting.
MACRS (200% DB)
Front-loaded deductions. Half-year convention. IRS-prescribed for most tangible property.
The Formula
Straight Line spreads the depreciable amount evenly over the asset's useful life. MACRS (Modified Accelerated Cost Recovery System) uses 200% Declining Balance with a half-year convention — year 1 gets half the normal rate, and the recovery period extends by one year. MACRS switches to Straight Line when SL produces a larger deduction, ensuring the asset is fully depreciated by the end of its recovery period.
Variable Definitions
Asset Cost
The purchase price or capitalized cost of the asset. For tax purposes, this typically includes shipping, installation, and any costs to prepare the asset for use.
Salvage Value
Estimated residual value of the asset at the end of useful life. Under MACRS, salvage value is generally ignored for tax depreciation — the full cost is depreciated.
Useful Life
Number of years over which the asset is depreciated. The IRS assigns recovery periods to asset classes (e.g., 5-year for computers and vehicles, 7-year for office equipment, 27.5-year for residential rentals).
200% Declining Balance
An accelerated method that doubles the straight-line rate and applies it to the declining book value each year. This produces the largest deductions in the earliest years.
Half-Year Convention
Under MACRS, year 1 (and year n+1) receive only half the normal depreciation, reflecting mid-year asset placement. This effectively extends the recovery period by one year beyond the stated useful life.
How to Use This Calculator
- 1
Enter the original purchase cost of the asset, including any capitalized costs.
- 2
Enter the estimated salvage value at end of life (use 0 if none). For MACRS, salvage value is typically ignored for tax purposes.
- 3
Set the useful life in years (e.g., 5–7 years for equipment, 27.5–39 for real estate).
- 4
Select Straight Line for equal annual deductions, or MACRS for accelerated tax depreciation with half-year convention.
- 5
Review the bar chart and year-by-year schedule to compare methods side by side.
Common Applications
- Calculate annual depreciation deductions for business equipment using Straight Line or MACRS methods for tax reporting.
- Compare different depreciation methods side by side to determine which strategy minimizes taxable income in early asset years.
- Project the declining book value of assets over their useful life for accurate financial statements and budget planning.
Straight Line distributes depreciation evenly; MACRS accelerates deductions to earlier years for greater tax savings up front
Understanding the Concept
DepreciationThe decrease in an asset's value over time due to wear, age, or obsolescence. Used in tax calculations and financial reporting. allows businesses to recover the cost of long-term assets over their useful lives. Straight Line is the simplest method — equal deductions every year. MACRS is the IRS-prescribed system for most tangible property used in business. It uses 200% Declining Balance with a half-year convention, meaning you get a larger deduction in the early years and a smaller one later. The half-year convention assumes the asset was placed in service mid-year, so year 1 gets half the normal DB amount and the recovery period extends by one year. MACRS automatically switches to Straight Line in later years when SL produces a larger deduction — this is called the "SL switch" and prevents the asset from being under-depreciated. For tax planning, MACRS is usually preferred because accelerating deductions defers tax payments, and the time value of money makes earlier deductions more valuable than later ones.
Frequently Asked Questions
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