Fixed Asset Depreciation Options in Dynamics NAV

by | May 26, 2017 | Dynamics 365 Business Central, Dynamics NAV

*This post was written for Dynamics NAV but the content directly applies to Dynamics 365 Business Central, which is the cloud product based on Dynamics NAV. You may notice some slight differences in the screenshots, but the information and steps are directly applicable to Dynamics 365 Business Central.

Fixed Assets in Dynamics NAV include a number of potential workflows, various possible settings to dictate general ledger integration, many asset categorization options, and additional features such as insurance and maintenance. The focus of this discussion will be on the depreciation engine itself and, specifically, the general options used to set up those depreciation calculations.

To simplify the discussion, we will break up depreciation options into three categories: straight-line, accelerated, and manual.

Straight Line Depreciation in Dynamics NAV

For an asset that is to be depreciated equally over its useful life, the straight-line approach is most appropriate. On a fixed asset card, in the Depreciation Book FastTab, the “Depreciation Method” would be set to ‘Straight-Line’ and the “No. of Depreciation Months” or “No. of Depreciation Years” would be filled in. Entry of either time-period will calculate the “Depreciation Ending Date” for you. You may alternatively enter a “Depreciation Ending Date” that will drive the “No. of Depreciation Months” and “No. of Depreciation Years” fields. The three fields are interrelated and work in any direction.

Fixed Asset Card in NAV

If you are unable to see some of the fields described, select the “Add More Depreciation Books” option shown in the image above (in blue).

Fixed Assets in Dynamics NAV

Accelerated Depreciation in Dynamics NAV

For an asset that is to be depreciated in an accelerated manner (i.e. more depreciation earlier in the asset’s life), the declining balance options in Dynamics NAV are used. In general, declining balance calculations mean that the remaining asset life going into a fiscal year is used as a basis for the next year’s calculation. The asset’s depreciation percentage is then applied to the remaining asset value.

As an example, a $6,000 asset with a 5-year life and a double-declining balance rule would be entered with 40% in the “Declining-Balance %” field (100/”life in years” x 2). It would then depreciate $2400 in the first year [$6000 x 40%], $1440 in the second year [($6000-$2400) x 40%], $864 in the third year [($6000-$2400-$1440) x 40%], and so on.

The above example will generally hold in NAV, but there are two additional nuances you will want to consider. First, there are two declining balance approaches and, second, each of these can be offset with straight-line calculations. The result is a total of four accelerated depreciation options in the “Depreciation Method” field:

  • Declining-Balance 1: This option assumes that an asset’s depreciation will be accelerated, but that the depreciation amounts within a fiscal year are always equal. In the above example, $200 would be depreciated per month in the first year of that asset’s life.
  • Declining-Balance 2: This option will result in the same annual depreciation for an asset as the option above, but will also result in acceleration within each year. Earlier months within a year will calculate higher depreciation amounts than later months in the year. Using the above example, $2400 would still be depreciated in year one, but not in even increments of $200 per month.
  • DB1/SL: This option works like Declining Balance 1, but a straight-line calculation is also considered. The greater of the two calculations will be booked as the depreciation amount. Using the above example, $2400 would still be depreciated in the first year, and $1440 in the second year. The third year would result in $1200 of depreciation because that straight-line calculation is greater than the declining balance calculation of $864. The Straight-Line calculation relies on the “No. of Deprecation Years” field on the asset card – which is required for DB1/SL and DB2/SL depreciation methods. Beyond simple Straight-Line, this is the most commonly used depreciation method in NAV.
  • DB2/SL: As you might imagine, this calculation is the same as Declining-Balance 2, but straight line takes over when that calculation is greater.

Manual Depreciation in Dynamics NAV

For an asset that does not conform to pre-configured calculation rules, there are two additional “Depreciation Method” options in NAV: User-Defined and Manual.

For a ‘User-Defined’ method, a “Depreciation Table” must be manually completed and assigned to the asset. This is useful when you know the depreciation percentages to be applied each month or year and when those percentages are not readily definable using the methods described above. It also makes the most sense when the per-period percentages are known in advance of starting depreciation against the asset or when the asset will be depleted in units per period that can be later applied in the depreciation table.

The ‘Manual’ method in NAV is simply a way to tell the depreciation calculation engine that you will be manually entering the depreciation each month in the FA Journal or the FA G/L journal.

Final thoughts on depreciation calculation options

The above should provide a general understanding of the depreciation calculation options. In addition, NAV offers numerous fields to influence specifics of the calculations. These include fields on the asset’s depreciation book for “Use Half-Year Convention”, “Final Rounding Amount”, “Use DB% First Fiscal Year” and much more. The following link on Depreciating or Amortizing Assets in Dynamics NAV from Microsoft’s Developer Network site will provide a jumping-off point to find additional information on those options as well as other fixed asset setup and related concepts.

Although there may be some manual configurations and settings needed for some asset rules, there should not be any GAAP or MACRS concept not achievable in NAV. When in doubt, use your test environment and experiment with the various fields and settings to ensure you will get the calculation results you are targeting.

 

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