You may pay your annual tax bill in two installments. The first installment is due November 1 and becomes delinquent at 5 pm on December 10, and the second installment is due February 1 and becomes delinquent at 5 pm on April 10. You may, however, elect to pay the entire bill when you pay the first installment. If you itemize your income taxes, this may be an advantage to you when calculating the deduction on your federal and state income taxes. Supplemental tax bills are mailed throughout the year and, therefore, may not be due or delinquent at the same time as your annual tax bill.