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Excel SYD Function

The SYD function calculates the depreciation of an asset for a given period based on the sum-of-years’ digits depreciation method.

syd function 1


=SYD(cost, salvage, life, per)


  • cost (required): The initial cost of the asset.
  • salvage (required): The value of the asset at the end of the depreciation.
  • life (required): The number of periods over which the asset is depreciated.
  • per (required): The period for which the depreciation is being calculated. It must use the same unit as life.

Return Value

The SYD function returns a numeric value.

Function Notes

  • SYD will return the #DIV/0! error if life = 0.
  • SYD will return the #VALUE! error if any argument contains a non-numeric character (note that in the example above, cost and salvage are numbers that were formatted as currency with the Format Cells feature).


As the below table shown, an asset had an initial cost of $10,000 and a salvage value of $1,000. The asset will depreciate over 5 years. To get its sum-of-years’ digits depreciation for the second year, please copy or enter the formula below in a blank cell, and press Enter to get the result:


Or, use cell references to make the formula dynamic:


syd function 2

Related functions

Excel SLN Function

The SLN function calculates the depreciation of an asset for one period based on the straight-line depreciation method.

Excel DB Function

The DB function returns the depreciation of an asset for a specified period by using a fixed-declining balance method.

Excel DDB Function

The DDB function returns the depreciation of an asset for a specified period by using a double-declining balance method or other specific method.

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