Property Tax Appeal Calculator

Current Annual Tax and Proposed Annual Tax both apply the same mill-rate formula -- assessed value divided by 1,000, multiplied by the Tax Rate -- to your Current Assessment and Proposed Assessment respectively, and Annual Tax Savings is simply the difference between them. Expected Savings then multiplies that annual savings figure by your Success Probability, giving a probability-weighted estimate of the appeal's value rather than assuming a successful outcome is guaranteed. Net Savings (Year 1) and 5-Year Net Savings both subtract your Appeal Cost from the (unweighted) annual savings, either once or across five years, to show the deterministic outcome if the appeal succeeds. Raising Current Assessment increases your savings (since it widens the gap to your proposed, lower figure), while raising Proposed Assessment shrinks it, and the Tax Rate scales that assessment gap directly into dollars.

Appeal Cost only reduces Net Savings, not Annual Tax Savings itself, since the cost of filing doesn't change how much tax you'd actually save if the appeal succeeds -- it only changes how much of that savings you keep after paying for the appeal. This calculator assumes a successful appeal reduces your assessment to exactly the Proposed Assessment you enter, and holds the tax rate constant for future years -- it does not model partial reductions, multi-year assessment freezes some jurisdictions grant after a successful appeal, or the possibility that the tax rate itself changes in later years. ROI on Appeal Cost is your first-year NET return -- (Net Savings Year 1) divided by Appeal Cost -- not the gross ratio of savings to cost, so it already accounts for the cost of the appeal itself rather than double-counting it as pure upside. Because an appeal only makes sense as a request for a LOWER assessment, Proposed Assessment is capped at Current Assessment: entering a proposed value at or above your current one is treated as no reduction (zero savings), rather than producing a nonsensical negative "savings" figure.