Free Depreciation Calculator
SLM & WDV with full depreciation schedule
Calculate asset depreciation using the Straight Line Method (SLM) or Reducing Balance / WDV method. Get annual depreciation, monthly depreciation, and a complete year-by-year schedule.
What Is a Depreciation Calculator?
A depreciation calculator helps businesses and accountants calculate the reduction in value of a fixed asset over its useful life. Two common methods are used: the Straight Line Method (SLM), which spreads depreciation equally across all years, and the Written Down Value (WDV) or Reducing Balance method, which front-loads depreciation in early years. This calculator supports both methods and generates a complete year-by-year depreciation schedule for assets with up to 20 years of useful life.
How to Use the Depreciation Calculator
Step 1 — Choose Depreciation Method
Select Straight Line Method (SLM) for equal annual depreciation, or Reducing Balance (WDV) for higher depreciation in early years.
Step 2 — Enter Asset Details
Input the asset cost, salvage/residual value at the end of useful life, and useful life in years (max 20). For WDV, the depreciation rate is auto-calculated but can be overridden.
Step 3 — Read the Schedule
Instantly see annual depreciation, monthly depreciation, total depreciation, and a complete year-by-year table showing opening value, depreciation, and closing book value.
Who Uses a Depreciation Calculator?
Business Owners & Finance Teams
Calculate annual depreciation for machinery, vehicles, and equipment to accurately report expenses in financial statements.
Accountants & CA Professionals
Prepare depreciation schedules for clients under both SLM and WDV methods as required by Indian accounting standards.
Tax Professionals
Calculate WDV depreciation as per the Income Tax Act, 1961 block rates for tax filing purposes.
Students
Learn how SLM and WDV methods work with a real calculator and a full year-by-year schedule.
Frequently Asked Questions
What is the Straight Line Method (SLM)?
SLM depreciates an asset by an equal amount each year. Annual Depreciation = (Cost − Salvage Value) / Useful Life. It is simple and suitable for assets that wear out evenly over time.
What is the Written Down Value (WDV) / Reducing Balance method?
WDV applies a fixed depreciation rate to the book value at the start of each year. This results in higher depreciation in early years and lower in later years — matching assets like vehicles or machinery that lose value faster initially.
How is the WDV rate calculated?
WDV Rate = 1 − (Salvage Value / Cost)^(1/Useful Life). This is the rate that reduces the asset's book value from cost to salvage value over the useful life. You can also manually override this rate.
What is salvage value?
Salvage value (also called residual value or scrap value) is the estimated value of the asset at the end of its useful life. The total depreciation equals Cost − Salvage Value.
Is this calculator free?
Yes, 100% free. No login, no subscription, no limits.