Why do I need to begin the lease renewal process at least 9-12 months before it expires?

Starting the lease renewal process 9-12 months before expiration gives you ample time to review your options and negotiate favorable terms with your landlord. This will also give you enough time to search for a new rental property if you are not satisfied with the renewal terms, without having to worry about the time pressure of an upcoming deadline.

Additionally, starting the renewal process early can increase your bargaining power with your landlord, as they may be more likely to offer you better terms if they know you have plenty of time to find a new property.