Entering depreciation

[Mike or Penny Novack]

> I have two accounts - an Asset account for the car
>and an Expense account for the depreciation.
>The asset account initially contains the full value of the car.
>Thereafter, every month I calculate the depreciation amount (this is
>the most difficult part), and create a transaction something like
>this:
>
>Monthly Honda Depreciation Expense:
>       DEBIT   $100.00 Expenses:Auto:Depreciation-Expense
>       CREDIT $100.00 Assets:Honda
>  
>
But why every month? It is much more usual to enter adjustment 
transactions (like depreciation) once a year.