Fairfax County property tax calculator 2026
This calculator provides an estimated property tax for Fairfax County, Virginia based on assessed value and a combined local real estate tax rate. Fairfax County applies a county-wide base rate plus additional rates that may apply depending on the property’s tax district.
Estimates only. Loan terms and approval depend on lender underwriting.
Many U.S. counties use multiple local taxing authorities (county, city, school district, special districts). Enter your combined local millage rate as shown on your annual property tax notice.
Estimated property tax
Enter the assessed value to see the estimated annual property tax.
How it works
In Fairfax County, real property is assessed annually at fair market value as of January 1. The county applies a base real estate tax rate set by the Board of Supervisors, and certain properties are subject to additional special-district rates. This estimator multiplies the assessed value by a combined local rate to produce an estimated annual amount.
Examples
If a property has an assessed value and a combined local real estate tax rate that includes the base rate and any applicable district rates, the estimated tax is calculated by multiplying the assessed value by that combined rate.
Limitations and important notes
Final tax liability depends on the exact taxing district, exemptions, and officially adopted rates, which are determined outside this estimator.
FAQs
Does Fairfax County use assessed value or market value?
Fairfax County assesses property at fair market value as of January 1 each year, and that assessed value is used for taxation.
Is there one total property tax rate for all of Fairfax County?
No. There is a county-wide base rate, but additional special-district rates may apply depending on the property’s tax district.
Who sets the property tax rates in Fairfax County?
The Fairfax County Board of Supervisors sets the base real estate tax rate and adopts special-district rates.
Is this calculator the same as my official tax bill?
No. This calculator provides an estimate, and the official tax bill may differ based on parcel-specific rates and factors.
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Calculations are simplified and for guidance only. Always double-check results and current rules with official sources or a qualified professional before making financial decisions.