SAP Note 21927 - Representation of 13 periods in Asset Accounting

Symptom:

A fiscal year is divided into four week periods, that is into 13 periods. How can this be represented in Asset Accounting?
Key words: period version, fiscal year version

Solution

It is generally the case that the periods of the useful life always refer to the specified number of periods of the fiscal year version.
Take this into account when specifying a useful life of less than one fiscal year. The same applies to the expired useful life if it is to be manually predefined for the old assets data takeover.
Example: 1 Periods of useful life correspond for a fiscal year version with

• 12 Periods: 1/12 of a year, i.e. one month

• 13 Periods: 1/13 of a year

• 26 Periods: 1/26 of a year

If you have an odd number of periods, there then can be a problem if the middle of the year is to be represented. For a fiscal year version with 13 periods the middle of the year would have to occur during period 6.5. However, you can only represent either 6 or 7, which means that in the year of acquisition the depreciation deviates by half a period (which is 1/26) from the exact result.
You can avoid this by defining a fiscal year version with 26 periods (you can use a different variant in Asset Accounting to that used in General Ledger providing that both the start and end of the year agree).
Furthermore, you should consider that the period control rules (determination of the depreciation period for a half-year rule) can only be automatically defined for a fiscal year version with 12 or 24 periods These rules must be entered manually for all other variants.