After year lease is up month to month?

[Kevin McDonald]

I am new to land lording, I have 3 rental properties.  My one property is just about up, my tenants have been great they pay rent a week early, are an older couple no kids, I have inspected the property multiple time and it is always spotless, etc.... 

I am just curious when the lease is up how do you handle follow on leases or if they ask for a month to month would you allow this?