Tax Calendar Tax Due Dates If a payment date falls on a Saturday, Sunday, or holiday, the due date is the following business day.

  • Assessment as of January 1
  • First installment bills are mailed October 5 through November 5 and must be paid by December 5
  • Second installment bills are mailed May 5 through 10 and must be paid by June 5 This sometimes occurs if your mortgage company changes or if they have incorrect address information. If you still require assistance, please call the Treasurer’s Office at 703-257-8242. Personal Property
  • Business returns of tangible personal property are due April 15
  • Bills are mailed in late August and are due on or before October 5
  • License renewals are due March 3
  • New businesses must file prior to start of business
  • Returns and tax are due the 20th of the month following the month of collection