I own no mainland land. Will I be billed?

Now that I have a private island, I have sold all of my mainland land. I have tiered all the way down. My next billing date is January 6. Will I be billed another $40 because I owned land in the previous cycle, or is your system smart enough to recognize that I no longer own any land. I do not wish to be billed this $40 as I am already paying $300 a month for the island.