No. Retainer payments requested vary according to foreseeable work to be completed on your file.
For instance, if your matter is proceeding by way of collaborative practice (CP) and you have an upcoming CP meeting, if your trust funds are not sufficient to pay for preparing for and conducting the meeting, you will be asked to make a payment. In short, retainer payments requested will depend on the scope and type of work required to get you to the next event in your matter.