Table of Contents
This guide explains how to use DB Function in Excel, including its syntax, required arguments, practical examples, and common errors.
Description: The function of calculating depreciation of assets with specific maturity using the method of calculating the declining balance by fixed level.
Syntax: DB (cost, salvage, life, period, [month]) .
Inside:
- cost : The initial cost of the property, required parameters.
- salvage : The recovery value of the property or the depreciation value of the asset, is a required parameter.
- Life : The number of depreciation periods of the property, also known as the useful life of the property, is the required parameter.
- Period : The period you want to calculate the depreciation, is a mandatory parameter and must have the same life unit.
- Month : Number of months counted in the first year, is an optional parameter if omitted the default value is 12.
Attention:
- In the first and last DB function, use a special formula different from other periods:
+ The first period is calculated by the formula: DB = cost * rate * month / 12.
+ The last period is calculated by the formula: DB = (cost - total depreciation of previous periods) * rate * (12-month)) / 12.
For example:
With the following data table:

Calculate:
- Calculating depreciation of assets in the first year.
- Calculating depreciation of assets in the second year.
- Calculating depreciation of assets in the fifth year, for 6 months.
- Calculating depreciation of assets in the first year.
In the cell to calculate enter the formula: = DB (D5, D6, D7,1) .

Result:

- Calculating depreciation of assets in the second year.
In the cell to calculate enter the formula: = DB (D5, D6, D7,2) .

Result:

- Calculating depreciation of assets in the 5th year, for 6 months.
In the cell to calculate enter the formula: = DB (D5, D6, D7,5,6) .

Result:

Through 3 values over the years, the depreciation value of assets has decreased over the years. Hope to help you identify and take reasonable measures when using the property.
Good luck!
FAQ
What does the DB function do in Excel?
The DB function performs the calculation described in this guide. Use the correct arguments and compatible data types for reliable results.
How do I enter the DB function correctly?
Start with an equals sign, enter DB, add the required arguments inside parentheses, and confirm that cell references and separators are correct.
Why does the DB function return an error?
Common causes include missing arguments, invalid data types, incorrect cell references, unsupported values, or regional separator settings.
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