Fairfax County property tax has two main pieces: real estate tax on your home and personal property tax on your vehicles. For tax year 2026, the proposed real estate base rate is $1.1225 per $100 of assessed value, and the vehicle rate is $4.57 per $100, though the state covers a large share of the vehicle bill.1Fairfax County, Virginia. Real Estate Tax Rates2Fairfax County. Vehicle Tax Rate Real estate taxes are due in two installments (July 28 and December 5), and vehicle taxes are due October 5.3Fairfax County, Virginia. Tax Due Dates and Deadlines
Real Estate Tax Rate and What You’ll Pay
Virginia law lets localities tax all real property, meaning land and any permanent structures on it.4Virginia Code Commission. Virginia Code 58.1-3200 – Real Estate Subject to Local Taxation The Board of Supervisors sets the county rate each May. At the proposed 2026 rate of $1.1225 per $100 of assessed value, a home assessed at $700,000 generates about $7,858 in county real estate tax before any exemptions.1Fairfax County, Virginia. Real Estate Tax Rates
If your home sits inside an incorporated town, you pay the county rate plus a town levy. Herndon adds $0.27 per $100 of assessed value, and Vienna adds $0.19 per $100.1Fairfax County, Virginia. Real Estate Tax Rates The town amount arrives on a separate bill but is calculated against the same county assessment.
Vehicle Tax and the State Subsidy
Virginia treats vehicles, trailers, and boats as tangible personal property subject to local taxation.5Virginia Code Commission. Virginia Code 58.1-3500 – Defined and Segregated for Local Taxation The Fairfax rate for most passenger vehicles is $4.57 per $100 of assessed value.2Fairfax County. Vehicle Tax Rate
The Personal Property Tax Relief Act reduces that bill. Virginia reimburses Fairfax County for 49% of the tax on the first $20,000 of a vehicle’s assessed value, and your bill already reflects the reduction.6Fairfax County. Vehicle Tax Subsidy On a car assessed at $15,000, the pre-subsidy tax of $685.50 drops to about $350.
Vehicle values come from the clean trade-in value in the January J.D. Power Used Car Guide; custom builds, antiques, and very new models are assessed through other recognized pricing sources.7Fairfax County, Virginia. Vehicle Assessment Methods The county also charges an annual registration fee of $33 for vehicles 4,000 pounds or under and $38 for heavier vehicles.8Fairfax County. Local Vehicle Registration Fees
New to the county? You have 60 days from your move-in or purchase date to register a vehicle, and taxes are prorated based on when the vehicle enters the county.9Fairfax County, Virginia. Vehicle Registration Information
How Your Assessment Is Set
The Department of Tax Administration assesses every property at its estimated fair market value as of January 1 each year.10Fairfax County, Virginia. Real Estate Assessments and Taxes Appraisers work from recent sales of comparable homes in your neighborhood, adjusting for differences in size, condition, and features. Additions, finished basements, and renovated kitchens can push the number up. Assessment notices arrive early in the year, well before tax bills, giving you time to review and, if needed, appeal.
The rate and the assessment are set independently. A higher assessment doesn’t automatically mean a higher bill if the Board lowers the rate, and vice versa. Your actual bill is the combination.
Payment Deadlines
Real estate taxes come in two installments, due July 28 and December 5. Vehicle personal property taxes are due in a single payment by October 5.3Fairfax County, Virginia. Tax Due Dates and Deadlines If any deadline falls on a weekend or county holiday, it shifts to the next business day.
To have your payment applied correctly, keep your Parcel ID or Map Reference Number for real estate handy, along with your property account number and Vehicle Identification Number for vehicles. All appear on your tax bill and can be looked up through the county’s online records.
How to Pay
The Department of Tax Administration accepts payments through several channels.11Fairfax County. Department of Tax Administration
- Online through the MyFairfax portal. Electronic check is free; credit or debit cards carry a 2.5% service fee from the payment processor.
- By phone using the automated payment line for credit or debit cards, with the same 2.5% fee.
- By mail, sending a check or money order to the address on your bill. The postmark date counts as the payment date.
- In person at the Fairfax County Government Center during business hours.
The card fee adds up. On a $4,000 real estate installment, 2.5% is another $100. Electronic check avoids it entirely.
Late Payment Penalties and Interest
Miss a deadline and the county adds an automatic 10% penalty on the unpaid amount for both real estate and vehicle taxes. From there, the two diverge.12Fairfax County, Virginia. I’ve Missed a Due Date. Now What?
- Real estate: interest accrues at 1% per year on the unpaid balance. Because payment is split into two installments, each late installment gets its own penalty.
- Vehicles and business property: interest runs at 5% per year, and if the tax stays unpaid more than 45 days past the due date, the penalty jumps from 10% to 25%.
The vehicle escalation is where late payers get stung. A bill two months overdue costs far more than one two weeks overdue.
Beyond penalties and interest, the county can pursue wage liens, bank liens, vehicle booting and towing, and public auction of real estate or vehicles.12Fairfax County, Virginia. I’ve Missed a Due Date. Now What? Virginia law also allows recovery of attorney or collection agency fees up to 20% of the delinquent amount.13Virginia Code Commission. Virginia Code 58.1-3916 – Counties, Cities, and Towns May Provide Dates for Filing
Appealing Your Assessment
If you think your assessment is too high, you can challenge it. Valid grounds are fair market value, lack of uniformity compared to similar properties, or errors in the property description.14Fairfax County, Virginia. Real Estate Assessment Appeals Arguing that the value jumped too much year over year is not enough on its own.
Real Estate
You have two routes, and you can pursue both at once. An administrative appeal goes to the Department of Tax Administration and must be postmarked, filed online, or emailed by April 1, 2026, at 4:30 p.m. An appeal to the Board of Equalization has a later deadline of June 1, 2026, at 4:30 p.m.14Fairfax County, Virginia. Real Estate Assessment Appeals You don’t have to file the administrative appeal first.
For residential properties, bring comparable sales showing your assessment exceeds fair market value. For commercial or income-producing properties, confirm you’ve filed the county’s income and expense survey. And keep paying on time while the appeal is pending. If your assessment is later reduced, the county issues a refund.
Vehicles
Vehicle assessment appeals must be postmarked by May 1.15Fairfax County, Virginia. Appealing Your Vehicle Assessment The two most common grounds are high mileage and body damage. For a mileage appeal, submit the Vehicle Tax Appeal Form with a recent inspection receipt, service receipt, or similar document showing your odometer. For body damage, you’ll need a detailed repair estimate on business letterhead from an auto shop or insurance adjuster, with the appraiser’s name, signature, and contact information.
Tax Relief for Seniors and People with Disabilities
Fairfax County offers real estate tax relief to residents who are at least 65 or permanently and totally disabled. For 2026, total combined household income must be $90,000 or less, and total combined net assets must be $400,000 or less, excluding the value of your home and up to one acre of land.16Fairfax County, Virginia. Tax Relief for Seniors and People with Disabilities
Relief is income-based. If your total combined income is $60,000 or less, you qualify for a 100% exemption on your real estate taxes. Higher income levels receive partial relief on a sliding scale.16Fairfax County, Virginia. Tax Relief for Seniors and People with Disabilities Applicants who turn 65 or become disabled during the application year may qualify for prorated relief. The program requires annual re-certification.
Disabled Veteran Exemption
The Virginia Constitution provides a full real estate tax exemption for veterans with a 100% service-connected, permanent, and total disability rating, so long as the property is their primary residence.17Virginia Code Commission. Constitution of Virginia Article X, Section 6-A – Property Tax Exemption for Certain Veterans and Their Surviving Spouses It extends to surviving spouses of qualifying veterans, and to spouses of service members who died in the line of duty with a Department of Defense determination, provided the spouse does not remarry.
To apply in Fairfax County, submit the Summary of Benefits letter from the U.S. Department of Veterans Affairs verifying the 100% service-connected, permanent, and total rating.18Fairfax County, Virginia. Tax Exemption for Disabled Veteran or Surviving Spouse Do not send the VA Decision of Benefits letter; that document contains protected medical information the county is not equipped to secure. Applications go through the Department of Tax Administration online.
Business Tangible Property
If you run a business in Fairfax County, personal property tax also applies to movable business assets: furniture, computer equipment, fixtures, heavy equipment, and vehicles used for business.19Fairfax County, Virginia. Understanding Business Tangible Property and Vehicle Taxes That includes property you own personally but use in the business, gifts, leased equipment, and items fully depreciated on your federal return. Machinery and tools used in manufacturing, mining, broadcasting, dry cleaning, and certain other industries are taxed in a separate category.
Businesses file a return by May 1 each year declaring taxable property in the county as of January 1, and the resulting bill is due October 5 with vehicle taxes.3Fairfax County, Virginia. Tax Due Dates and Deadlines Late filing and underreporting carry the same penalty and interest structure as other personal property taxes.