For all assessed property All taxes are due September 15, 2014. Your tax payment must be received by Clearwater County by 4:30 p.m. on September 15, 2014. An 8% penalty will be applied to all outstanding taxes. An additional 4% penalty will be applied to all outstanding tax balances December 15, 2014. Office hours are Monday to Friday, 8:00 a.m. to 4:30 p.m. Payment Options include: Online (please your bank for more details) by mail, in person during office hours. An after hour drop box is located at the front door. Please include your remittance portion of the tax notice. more... See more text