How to Pay Your Fairfax County Car Tax
Where to Pay Your Fairfax County Car Tax
Fairfax County car tax is paid to the Fairfax County Department of Finance, not to Virginia state. The county assesses the tax based on the value of your vehicle, and you receive a bill in the mail each year. You can pay in person, by mail, online, or by phone — each method has different timing and confirmation steps.
The fastest way to confirm your bill amount and due date is to log into the Fairfax County Online Services portal using your property account number or vehicle identification number (VIN). If you do not have online access, you can call the Department of Finance at the phone number on your bill, and they will tell you the exact amount owed and when it is due.
Key Takeaways
- Fairfax County car tax bills arrive by mail each year and are due on a date printed on the bill — typically in December for the following year's tax.
- You can pay online through the Fairfax County portal, by mail, in person at a county office, or by phone with a credit or debit card.
- Late payments trigger a penalty and interest charge, so if your bill is overdue, contact the Department of Finance to arrange payment before the penalty grows.
- If you sell your vehicle or move out of Fairfax County, notify the county to stop future bills and avoid paying tax on a car you no longer own.
Payment Methods and Where to Send Money
The county offers four ways to pay your car tax bill. Online payment through the Fairfax County portal is the fastest and gives you immediate confirmation; you will need your bill number or account number and a credit or debit card. By mail, send your check or money order to the address printed on your bill — allow 7 to 10 business days for the payment to reach and post to your account. In person, you can pay at the Department of Finance office during business hours with cash, check, or card. By phone, call the Department of Finance and provide your bill number and payment method; a representative will process the payment and give you a confirmation number on the spot.
Do not mail cash. If you pay by check or money order, write your bill number on the back. Keep your receipt or confirmation number — you will need it if you ever need to prove the payment was made on time. If you pay online, print or save the confirmation page.
When Your Payment Is Due and What Happens If You Are Late
Car tax bills in Fairfax County are typically due by December 5 of the year printed on the bill. The bill itself will show the exact due date. If your payment does not reach the county by that date, a penalty and interest charge are added to your balance. The penalty is a percentage of the unpaid tax, and interest accrues daily on the total amount owed.
If you miss the deadline, contact the Department of Finance immediately. Paying as soon as possible stops the interest from growing further. The county does not typically suspend your vehicle registration for car tax debt alone, but the debt can affect your ability to renew registration or transfer the title if you sell the vehicle. Paying the full amount — including any penalty and interest — clears the debt and removes any hold on your registration.
What to Do If You Did Not Receive Your Bill
Bills are mailed to the address on file with the county. If you moved and did not update your address, your bill may have gone to your old home. If you did not receive a bill, log into the Fairfax County Online Services portal to check your balance and due date, or call the Department of Finance. They can tell you whether a bill was issued and resend one if needed.
Do not assume you do not owe tax just because you did not receive a bill. The county's records show whether you own a vehicle registered in Fairfax County, and tax is owed whether or not you receive the notice. If you own a vehicle in the county, check your balance online or by phone at least once a year to stay current.
Stopping Your Bill When You Sell or Move Your Vehicle
If you sell your vehicle or move out of Fairfax County, you must notify the county to stop future tax bills. Contact the Department of Finance with your vehicle identification number (VIN) and the date you sold or moved the vehicle. Provide proof if you have it — a bill of sale, registration transfer, or a statement from your new state's DMV showing the vehicle is now registered elsewhere.
If you do not notify the county and continue to receive bills, you are still responsible for paying them. The county will not know the vehicle is no longer yours unless you tell them. If you have already paid tax on a vehicle you no longer own, you may be able to request a refund or credit, but you will need to provide documentation of the sale or transfer.
Online Payment and Account Access
The Fairfax County Online Services portal lets you view your bill, check your balance, and pay online 24 hours a day. To log in, you will need your property account number (found on your bill) or your VIN. If this is your first time using the portal, you may need to register with an email address and create a password.
Paying online is secure and immediate — the payment posts to your account the same day. You will receive a confirmation number on screen; save or print it. If you have questions about your bill or need to set up a payment plan, the portal also shows contact information for the Department of Finance, and you can call during business hours to speak with a representative.
Payment Plans and Hardship Options
If you cannot pay your full car tax bill by the due date, contact the Department of Finance before the deadline to discuss your options. The county may allow you to set up a payment plan to pay the tax in installments over several months. A payment plan stops additional penalties from accruing as long as you make each payment on time.
To request a payment plan, call the Department of Finance and explain your situation. You will need to provide your bill number and propose a payment schedule you can meet. The county will review your request and let you know whether it can be approved. If approved, you will receive written confirmation of the payment dates and amounts. Missing a payment on a plan can result in the full balance becoming due immediately, so make sure you can commit to the schedule before you agree to it.
Frequently Asked Questions
Can I pay my Fairfax County car tax with a credit card?
Yes, you can pay with a credit or debit card online through the Fairfax County portal or by phone with a Department of Finance representative. Be aware that the county may charge a processing fee for credit card payments, so check the portal or ask when you call to confirm the total amount you will pay.
What if I own multiple vehicles in Fairfax County?
You will receive a separate bill for each vehicle. Each bill has its own due date and amount based on that vehicle's value. Pay each bill separately, or log into the online portal to see all your bills and pay them together.
Do I have to pay car tax if I only own the vehicle for part of the year?
Fairfax County taxes the vehicle based on ownership as of January 1 of the tax year. If you owned it on that date, you owe tax for the full year, even if you sold it later. If you buy a vehicle after January 1, you typically do not owe tax until the following year.
What happens if I pay late but then move out of state?
You are still responsible for the unpaid balance, including penalties and interest. The county may report the debt to a collection agency or place a hold on your vehicle registration. Paying the full amount owed clears the debt. If you believe there is an error on your bill, contact the Department of Finance to dispute it before you move.
Can I get a refund if I overpaid my car tax?
Yes. If you paid more than you owed, contact the Department of Finance with your bill number and proof of payment. The county will issue a refund or apply the overpayment to next year's bill, depending on your preference.