This article describes the formula syntax and usage of the DDB function (function: A prewritten formula that takes a value or values, performs an operation, and returns a value or values. Use functions to simplify and shorten formulas on a worksheet, especially those that perform lengthy or complex calculations.) in Microsoft Excel.
Returns the depreciation of an asset for a specified period using the double-declining balance method or some other method you specify.
DDB(cost, salvage, life, period, [factor])
The DDB function syntax has the following arguments (argument: A value that provides information to an action, an event, a method, a property, a function, or a procedure.):
- Cost Required. The initial cost of the asset.
- Salvage Required. The value at the end of the depreciation (sometimes called the salvage value of the asset). This value can be 0.
- Life Required. The number of periods over which the asset is being depreciated (sometimes called the useful life of the asset).
- Period Required. The period for which you want to calculate the depreciation. Period must use the same units as life.
- Factor Optional. The rate at which the balance declines. If factor is omitted, it is assumed to be 2 (the double-declining balance method).
Important All five arguments must be positive numbers.
- The double-declining balance method computes depreciation at an accelerated rate. Depreciation is highest in the first period and decreases in successive periods. DDB uses the following formula to calculate depreciation for a period:
Min( (cost - total depreciation from prior periods) * (factor/life), (cost - salvage - total depreciation from prior periods) )
- Change factor if you do not want to use the double-declining balance method.
- Use the VDB function if you want to switch to the straight-line depreciation method when depreciation is greater than the declining balance calculation.
The example may be easier to understand if you copy it to a blank worksheet.
How do I copy an example?
- Select the example in this article. If you are copying the example in Excel Web App, copy and paste one cell at a time.Important Do not select the row or column headers.
Selecting an example from Help
- Press CTRL+C.
- Create a blank workbook or worksheet.
- In the worksheet, select cell A1, and press CTRL+V. If you are working in Excel Web App, repeat copying and pasting for each cell in the example.
Important For the example to work properly, you must paste it into cell A1 of the worksheet.
- To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.
After you copy the example to a blank worksheet, you can adapt it to suit your needs.
||Lifetime in years
||First day's depreciation. Microsoft Excel automatically assumes that factor is 2. (1.32)
||First month's depreciation (40.00)
||First year's depreciation (480.00)
||Second year's depreciation using a factor of 1.5 instead of the double-declining balance method (306.00)
||Tenth year's depreciation. Microsoft Excel automatically assumes that factor is 2 (22.12)
Note The results are rounded to two decimal places.