Past tax assessments are records of how much taxes have been paid on the property in the past. These records are available from local and state taxing authorities, as well as county clerk offices. Knowing the past tax assessment can help you determine if the taxes on the property have been increasing or decreasing over time. This information can also be useful when negotiating with a seller, as some may factor in past taxes when determining their asking price. Additionally, assessments typically include information on any exemptions or credits that the property owner has received in the past.