The taxes that become payable October 1 cover the current calendar year.

From the first day of each month beginning 1 March, interest of 1.5 percent per month (18 percent annually) is added to your base tax amount. If the Post Office fails to postmark your payment by the dates due, it is considered a late payment. This applies even if you mail your payment on time. For mail-in payments, office meter dates are not accepted. Online property tax payments are recognized by the county as paid on the date of the online transaction. 

Near the end of September of each year. Property tax bills are mailed to the owner of record. New owners should contact their title company or review their closing statement to determine who is responsible for paying the taxes. Payment of property tax depends on when the property is transferred. Unpaid taxes continue to accrue against the property.