Depreciation Calculator
Straight line, declining balance and sum-of-years depreciation.
How it works
Straight line spreads the cost evenly: (cost - salvage) / life. It is simple and it is what most small businesses use.
Accelerated methods load more of the expense into the early years, which matches how most assets actually lose value and defers tax. Declining balance applies a fixed percentage to the falling book value; sum-of-years-digits weights each year by remaining life.