What is the acceptable duration for new sales officers until they start achieving their monthly sales target?

The acceptable  duration of new sale  is depended to the kind of product and visible market. and the best duration is3 months which can make  sale stable .

I would say3-4 months.

First two months are generally a learning months. They learn about the products/service, target market, customers/clients, marketing plan, and getting to know the company itself.

from2-3 months