SLN – Straight Line Depreciation Function in Google Sheets

SLN function help

Straight-line depreciation (SLN) is the most straightforward and common depreciation method. Most accounting departments choose this method due to its simplicity. Further, most fixed assets’ usefulness is consumed at an even rate, so this method reflects the usage of the asset.

See a table comparing the different depreciation amounts using other methods to help choose between them.


Purpose of the SLN Function

To return the value of one period of straight-line depreciation expense.

Similar Functions

SYD – Sum-of-the-years digits depreciation

DB – Declining balance depreciation

DDB – Double-declining balance depreciation



  • cost – The acquisition cost of the asset. The cost includes the purchase price and costs associated with its acquisition, such as freight and sales tax.
  • salvage – The amount you expect to receive in exchange for the asset at the end of its useful life. Typically, this is zero. However, an example of a case where this is not zero is an automobile’s expected trade-in value.
  • life – The length of time that the asset is expected to be in service. Stated in the number of periods.


SLN formula


Example 1

An automobile is purchased for $40,000, is expected to last 36 months, and be sold for $4,000.

2$40,000costacquisition cost
3$4,000salvagemoney back at end of life
436lifenumber of periods for the useful life
=SLN(A2,A3,A4)Depreciation expense each period$1,000

Example 2

You purchase a laptop computer for €3,000 that is expected to last 36 months and have no value after two years.

=SLN(3000,0,36)Depreciation expense each period€83.33

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