This Article explores a question at the heart of tax exemptions for families under the Florida Constitution: what is a “family unit?” The Florida Statutes give no answer. So, does being married automatically make a family under the Constitution? How can a couple determine whether their love life, or marriage plans, might interfere with increasingly valuable tax exemptions? How should property appraisers decide such an intimate issue? To answer these questions, this Article first introduces the term “family unit,” and argues that it must be clearly defined by the legislature to ensure equitable administration of exemptions. Next, the Article discusses the origins of the “family unit” requirement and the term’s potential interpretations. Third, the Article addresses how lacking a standard definition can cause inequities in the system. Fourth, the Article summarizes the Attorney General Opinions and recent circuit and appellate cases on the subject of separate family units. Finally, the Article offers three potential resolutions to the current ambiguity surrounding the term: abolishing all property tax exemptions; defining a “family unit” as a married couple; and proposing a model statute defining “family unit” with specific factors for property appraisers to use when determining whether a “family unit” exists.