As suggested on our Pricing page, I’m afraid this is an impossible question to answer. There are too many variables, including the most obvious – your starting position.
What’s more, you have to consider that Google’s search algorithms are always changing. it’s recorded that they make thousands of improvements to their algorithm every year.
An update can have a huge impact on your rankings, so unfortunately no agency specialising in SEO service can ever say that the job is done.
Rankings can fluctuate depending on the keywords and how competitive they are. New players can come into a marketplace. Other SEOs could be devising their own tactics for their clients who could be your competitors.
This all being said, we delight our clients with the services we provide and we would expect after the first three month period to have made some sort of positive impact in terms of clicks and conversions.