The Excel Amorlinc function calculates the prorated linear depreciation of an asset for each accounting period. The function has been introduced into Excel for users of the French accounting system.
The syntax of the Amorlinc function is :
Where the arguments are as follows:
cost    The cost of the asset  
date_purchased    The date of purchase of the asset  
first_period    The date of the end of the first period  
salvage    The salvage value, at the end of the asset's lifetime  
period    An integer that specifies the period over which the depreciation is to be calculated  
rate    The rate of depreciation of the asset  
[basis]    An optional integer argument which specifies the financial day count basis that is used in the calculation. Possible values are:  


The financial day count basis rules are explained in detail on the Wikipedia Day Count Convention page 
Note that the date_purchased and the first_period arguments should be entered into the function as either:
Warning:
In the following example, the Excel Amorlinc function is used to calculate the depreciation of an asset during the first period. The asset was purchased on 01Jan2011, at a cost of €150 and the first period ends on 30Sep2011. The asset depreciates at a rate of 20% per year and has a salvage value of €20. The European day count basis is used.
A  B  

1  Purchase Date:  01Jan2011 
2  First Period Date:  30Sep2011 
3  =AMORLINC( 150, B1, B2, 20, 1, 20%, 4 ) 
The function returns the value 30.
 i.e. the asset depreciates by €30.00 during the first period.
Note that, in the above example, as recommended, the date arguments have been input to the function as references to cells containing dates.
Further details of the Excel Amorlinc function can be found on the Microsoft Office website.
If you get an error from the Amorlinc function, this is likely to be one of the following:
#NUM!   
Occurs if either:

#VALUE!   
Occurs if either:

#NAME?   
Occurs when Analysis ToolPak addin is not enabled in your Excel. + Show How to Do This in Excel 2003: 