Revenue recognition is dealt under IAS 18
Since you are a service providing organization IAS 18 has certain conditions which are to be satisfied before revenue in recognized in service sector those are
1. The amount of revenue can be measured reliably
2. It is probable that the economic benefits associated with the transaction will flow to the entity
3. The stage of completion of the transaction at the balance sheet date can be measured reliably
4. The costs incurred for the transaction and the costs to complete the transaction can be measured reliably.
Once the service has been delivered or used by the client by definition it should fall in the category of trade debtor. The bills are to be documented in the form of formal invoice.
kind regards,
Aneeb
