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Depreciation Calculator

Build a complete depreciation schedule in seconds. Enter cost, salvage value, useful life, choose a method (Straight-Line, 200% Declining Balance, or Sum-of-the-Years’ Digits), and optionally apply a partial-year convention. Get yearly beginning/ending book value, expense, and accumulated depreciation—instantly.

Depreciation Schedule

Year Beginning Book Value ($) Depreciation Expense ($) Accumulated Depreciation ($) Ending Book Value ($)
Schedule based on selected method and partial-year convention

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What you can calculate

  • Year-by-year depreciation expense

  • Accumulated depreciation and ending book value

  • Partial-year adjustments by date in service and fiscal year start

Methods (at a glance)

  • Straight-Line (SL): (Cost − Salvage) ÷ Useful life each full year.

  • 200% Declining Balance (DDB): (Book value × 2 ÷ Useful life); capped so book value never drops below salvage.

  • Sum-of-the-Years’ Digits (SYD): (Remaining life ÷ Sum of digits) × (Cost − Salvage), front-loaded.

Partial-year conventions supported

Choose how the first/last year is prorated:

  • Full Year: no proration.

  • Count Every Day: prorates by exact days in service.

  • Half Month / Full Month

  • Half Quarter / Full Quarter

  • Half Year

Set asset service date and accounting year start (e.g., July 1) to match your books.

Example

Inputs: Cost $100,000; Salvage $10,000; Life 5 years; Method: Straight-Line; In-service: Sept 15; Convention: Count Every Day; Fiscal year: Jan–Dec.

Result (Year 1 excerpt): Annual SL is $18,000; first-year expense prorated by days from Sept 15 to Dec 31; remaining years take full $18,000 until the last partial year reaches salvage.
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Tips

  • Salvage < Cost and useful life > 0 are required.

  • For DDB, many accountants switch to SL near the end to finish at salvage—this tool caps depreciation so you never go below salvage.

  • Align your fiscal start month with your ERP/GL to keep prorations consistent.

Limits & notes

  • Educational estimates only—consult your accountant for GAAP/IFRS/Tax specifics (e.g., MACRS, Section 179, bonus depreciation).

  • Day-count uses a 365-day year for proration.