Home More News Property Taxes in 2019 Property Taxes in 2019 Property tax bills will be mailed on April 10th and are due on May 10th and November 12th of 2019. Taxes can be paid in one of three ways: Online at www.co.steuben.in.us. By phone at 1-866-480-8552. By check. A convenience fee of 2.5% is charged for online and phone payments.