Fastbase

A non-diminishing item is a product or service in FastBase that we do not record the stock level of. The "stock on hand" will usually show as blank on most screens and reports.

Examples of non-diminishing items include Labour and Travel.
Some businesses may also treat consumable items like Oil or Diesel as non-diminishing items.

Non-diminishing items do not appear in the Stock Valuation Report.

If you are going to purchase non-diminishing items then they should belong to a special stock type (see Stock Types). This stock type should have a special "Stock/Purchases Account" defined so that purchases of this item do not affect the "Stock on Hand" account.

If we use the example of "Oil" then you should define the "Stock/Purchases Account" as an expense account, for example: Fuel Expenses.
When Oil is purchased using the normal stock purchasing means and then the Supplier Invoice is created (via Invoice Goods Receipts/Credits) the Fuel Expenses account is debited (instead of the default stock on hand account).

When non-diminishing items are sold they affect only Sales; the stock and cost of sales accounts are not posted to.