Depreciation Calculator

About the Depreciation Calculator

Depreciation allocates the cost of a tangible asset over its useful life, reflecting the gradual consumption of economic value. It's simultaneously a key accounting concept (matching expenses to revenue periods), a tax strategy (accelerating deductions reduces taxable income), and a management tool (tracking asset values for replacement planning). Every business with fixed assets needs to calculate depreciation accurately.

This calculator supports six depreciation methods. Straight-line is the simplest and most common for financial reporting. Double declining balance and sum-of-years' digits are accelerated methods that front-load expenses. Units of production ties depreciation to actual usage. MACRS (Modified Accelerated Cost Recovery System) is the mandatory U.S. tax depreciation system — 5-year MACRS covers vehicles and computers, while 7-year covers equipment and furniture.

The choice of method significantly impacts reported profits and tax liability. Accelerated methods reduce taxable income in early years (time value of money benefit) but increase it later. This calculator lets you compare methods side-by-side and generates complete schedules for financial reporting, tax returns, and asset management.

When This Page Helps

Whether you're filing taxes, preparing financial statements, or planning equipment replacements, this calculator gives you the exact depreciation schedule under each method with side-by-side comparisons. Use it to see how year-1 deductions, accumulated depreciation, and ending book value change across tax and reporting approaches.

How to Use the Inputs

1. Enter the original cost (purchase price + installation) of the asset
2. Set the estimated salvage (residual) value at end of useful life
3. Enter the useful life in years
4. Select a depreciation method (6 available including MACRS)
5. For units of production, enter total expected and annual units
6. Review the schedule and compare year-1 expense across methods

Example Calculation

Tips & Best Practices

• For U.S. tax purposes, MACRS is the standard federal depreciation system; other methods are typically for financial reporting
• Section 179 and bonus depreciation can accelerate deductions for qualifying assets, subject to current IRS rules
• Keep book depreciation on straight-line for consistent financial reporting — use MACRS only for taxes
• Review useful life estimates annually — technology assets often become obsolete faster than expected
• Document your salvage value estimates — auditors may challenge unreasonably high or low values

When To Use

Use straight-line for stable reporting, accelerated methods when early deductions matter, and MACRS when you need U.S. tax depreciation schedules.

What To Watch

Check salvage value, useful life, and any partial-year convention before comparing methods. For units-of-production, make sure the total expected units reflect realistic operating capacity. For tax assets, confirm the correct MACRS class life before relying on the schedule.

Frequently Asked Questions

• Which depreciation method should I use for taxes?

  In the U.S., MACRS is the standard federal tax depreciation system. MACRS prescribes specific recovery periods (5, 7, 15, 27.5, 39 years) and methods. You may also have access to Section 179 or bonus depreciation depending on current IRS rules.

• What is Section 179 depreciation?

  Section 179 allows businesses to deduct the full cost of qualifying assets in the year of purchase, subject to annual IRS limits that change over time. It is a powerful tax benefit for businesses buying equipment, vehicles, or software.

• What is the half-year convention in MACRS?

  MACRS assumes all assets are placed in service at the midpoint of the year, regardless of actual purchase date. This means year-1 depreciation is half of the normal first-year rate. That's why MACRS 5-year actually spans 6 calendar years.

• Can land be depreciated?

  No. Land is not depreciable because it does not wear out or become obsolete. When purchasing real estate, you must allocate the price between land (not depreciable) and the building (depreciable over 27.5 or 39 years).

• What happens if I sell an asset before it's fully depreciated?

  You compare the selling price to the book value (cost minus accumulated depreciation). If you sell above book value, you recognize a gain (subject to depreciation recapture tax). Below book value = a deductible loss.

• Why do companies use different methods for books vs taxes?

  Tax methods (MACRS, Section 179) maximize early deductions to reduce current taxes. Book methods (usually straight-line) spread costs evenly for smoother reported earnings. The difference creates a "deferred tax liability" on the balance sheet.