Brian Dunning's FileMaker Custom Functions

DepreciationStraightLineAmount ( Cost ; ResidualValue ; NoYrsDepreciation )

Calculates the value at which an asset depreciates annually when using the straight line method of calculating depreciation

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Ed Bullock   Ed Bullock
Camise Solution Limited

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  Sample input:
DepreciationStraightLineAmount ( 11000 ; 1000 ; 5 )
  Sample output:

  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

Calculates the annual depreciation value when using the straight line method of calculating depreciation i.e the asset loses the same value year after year rather than losing more in depreciation in its early years (Reducing Balance method)

Enter the Cost
Enter the Residual Value (scrap value after its usable life)
Enter the number of years over which it will depreciate (the assets usable life)

Returns a figure of how much the asset depreciates each year


Cost of asset: 11,000
Residual cost: 1,000
NoYrsDepreciation: 5

Returns 2,000


Yr1: 11,000 - 2,000 = 9,000
Yr2: 9,000 - 2,000 = 7,000
Yr3: 7,000 - 2,000 = 5,000
Yr4: 5,000 - 2,000 = 3,000
Yr5: 3,000 - 2,000 = 1,000 (residual value)



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Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

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