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# DB

This function calculates the depreciation of an asset for a specified period using the fixed‑declining balance method.

## Syntax

`DB(cost, salvage, life, period, month)`

## Arguments

This function has these arguments:

Argument

Description

cost

Initial cost of the asset

salvage

Value at the end of the depreciation period

life

Number of periods over which the asset is being depreciated

period

Period for which you want to calculate the depreciation; use the same units as the life argument

month

[Optional] Number of months in the first year; if omitted, the calculation uses 12 months

## Remarks

The fixed-declining balance method computes depreciation at a fixed rate. This function uses the following equation to calculate depreciation for a period:

(cost – total depreciation from prior periods) x rate

where:

rate = 1 – ((salvage/cost)^(1/life)), rounded to three decimal places

Depreciation for the first and last periods is a special case. For the first period, the function uses this equation:

dep = cost x rate x month/12

For the last period, the function uses this equation:

dep = ((cost – total dep. from prior periods) x rate x (12 – month))/12.

## Data Types

Accepts numeric data for all arguments. Returns numeric data.

## Examples

`DB(B1,1000,10,1)`

`DB(R1C2,10000,10,1)`

`DB(500000,5000,5,1,10)` gives the result of \$25,0833.3333333333.