The Tax Estimator allows you to calculate the estimated Ad Valorem taxes for a property located in Clay, Duval and St. Johns County. Click on the link below, choose a tax district/city from the drop-down box (selections include the taxing district number, the name of the district/city, and the millage rate used for calculation), enter the purchase price of the home in the space provided then press the ''Submit'' button. The results displayed are the estimated yearly taxes for the property, using the last certified tax rate, without exemptions or discounts.