Want to upgrade to business plan but already paid for a year of personal

Hi , I wanted to upgrade my plan to access Business plan features, I already paid for a year of the personal plan so it's saying I wont have premium until September. Would I have to cancel the yearly plan I already paid for in order to get my premium features now? 

Thanks

Thank you so much @paul2009 ! 

I too paid for a full year.  If I upgrade, do I pay a pro-rated account for the business plan or do I pay the full amount for the business plan and just lose the bulk of what I paid for a personal plan?  This means I have to stay where I am until next year because that's still a lot of money to lose.  Thanks in advance.  

7 hours ago, MoeCritiques said:

If I upgrade, do I pay a pro-rated account for the business plan or do I pay the full amount for the business plan and just lose the bulk of what I paid for a personal plan?

If you change the billing plan, and do not change the billing cycle, you will pay the difference between the two plans.