For all due dates, if the date falls on a Saturday, Sunday, or County holiday, the due date is extended to the following business day.
Tax bills are mailed approximately 30 days prior to the payment due date.
Service members deployed outside of the United States may be allowed an extension for payment of Real Estate and Vehicle (“Car”) Taxes. To request a payment extension under this provision, the service member should notify the Department of Tax Administration of his or her deployment and then contact us and pay within 90 days upon return. A copy of military orders is required.
Real Estate Taxes & Fees | Vehicle ("Car") Taxes & Fees | Business Taxes | Other Due Dates
Real Estate Tax
End of February
- Annual Notice of Real Estate Assessment Change notices mailed.
April 1
- Deadline to file real estate assessment appeal with the Department of Tax Administration
Early May
- Real estate tax rate set by Board of Supervisors.
June 1
- Deadline to file real estate appeal with Board of Equalization.
July 28
- First installment real estate tax payment due.
December 5
Because December 5 falls on a Saturday in 2026, the due date is extended to Monday, December 7, 2026.
- Second installment real estate tax payment due.
Vehicle ("Car") Taxes & Fees
February 15
Because February 15 falls on a Sunday in 2026 and the county is closed on Monday, February 16 for the George Washington’s Day – Presidents’ Day Holiday, the due date is extended to Tuesday, February 17.
- Payment due for vehicles purchased or moved into the county and registered with Fairfax County on or after July 1 of the prior year.
May 1
- Deadline to report changes in vehicle ownership and addresses for renewals and to register boats, trailers, and mobile homes.
October 5
- Payment due for existing vehicles and new vehicles registered in the county prior to July 1.
Business Taxes
- All new businesses that are starting or relocating into the county must register for Business, Professional and Occupational License (BPOL) within 75 days.
- Any business selling food and beverages as meals must file, collect, and remit the Food and Beverage Tax.
- New Short Term Rental businesses must return their application for certification within 30 days of the start of business. Quarterly filings are required and are due no later than the 20th of the month following the end of the quarter.
- Transient Occupancy Tax is due on or before the 20th day of the month covering the amount of tax collected during the preceding month.
- Other County Licenses
February 15
Because February 15 falls on a Sunday in 2026 and the county is closed on Monday, February 16 for the George Washington’s Day – Presidents’ Day Holiday, the due date is extended to Tuesday, February 17.
- Renewal Application for Certification as a Short Term Rental Business due.
March 1
Because March 1 falls on a Sunday in 2026, the due date is extended to Monday, March 2, 2026.
- Business, Professional & Occupational License (BPOL) renewal deadline and payment due.
May 1
- Business Return of Tangible Personal Property and Machinery and Tools filing deadline.
October 5
- Business tangible personal property tax payment due.
Tax Relief for Seniors and People with Disabilities
May 1
- Renewal deadline for returning applicants in the Tax Relief Program.
December 31
- Deadline for first-time or hardship tax relief applicants to apply for current and one prior year.
Dog Licenses
- All dogs four months of age and older must be licensed.
- Fairfax County partners with PetData,Inc. to provide dog licensing services for the county. PetData will handle everything from mailing animal licensing notices, processing payments and entering data, answering phone calls from dog owners to online dog licensing.
- For all licensing questions, contact PetData directly at: www.petdata.com/fairfax or by phone at 1 (888) 556-2906.
January 31
- Dog License Renewal and payment deadline (applications mailed in November)