Kingsport Property Taxes Are Due By November 30th To Avoid Penalties. A 2% Fee Will Be Added To Unpaid Taxes Starting December 1st, With More Fees Each Month Until Paid In Full. Payments Can Be Made Online, By Mail, Or At City Hall’s Customer Service Center. Credit/Debit Card Payments Have A 2.75% Fee, While Echeck Payments Have No Extra Fees. For More Details, Visit Kingsporttn.Gov