This bill amends section 689.261 of the Florida Statutes to enhance the disclosure of estimated ad valorem taxes for residential properties listed on public-facing online platforms. It introduces definitions for "listing platform" and "property," and mandates that property listings must include estimated ad valorem taxes. The bill prohibits the use of the current owner's ad valorem assessment or taxes for calculating these estimates under certain conditions and requires listing platforms to use specified methods for calculation. If the estimates are not derived from a tax estimator or buyer payment calculator, the current owner's taxes cannot be displayed, and a link to the county property appraiser's homepage and tax estimator must be provided instead.

Additionally, the bill provides immunity for listing platforms against claims related to inaccuracies in the estimated ad valorem taxes and restricts the inclusion of the current owner's taxes in printed listing materials. The Department of Revenue is tasked with developing a formula for calculating estimated taxes and must publish this formula and related information annually on its website. The department will also create a countywide aggregate average millage rate for each county, which can be used as an alternative method for satisfying the bill's requirements. The act is set to take effect on July 1, 2026.