The decision to hire a tutor can be a difficult and confusing one for a parent. Every parent wants to believe that their child is doing great and seeking out professional help to get them up to speed academically can be a sobering and painful decision.
I would advise any parent considering hiring a tutor to consult with their child's teacher and perhaps their counselor at school as well. They know your child in the academic environment better than anyone else. If anyone can make an informed decision about whether to bring in a tutor it is an educator.