What Is Appeal Deadline?

The appeal deadline is the most important date in the property tax calendar. Miss it, and you lose your right to challenge your assessment for the entire tax year. There are no extensions, hardship waivers, or second chances in most jurisdictions. The deadline varies dramatically by state. Some states have fixed annual deadlines that are the same every year. Texas uses May 15 (or 30 days after the notice is mailed, whichever is later). California's regular roll deadline is September 15, with a supplemental roll deadline of November 30. Other states tie the deadline to when your assessment notice is mailed. Florida gives 25 days from the TRIM notice. Georgia allows 45 days from the assessment change notice. New York uses a specific Grievance Day, typically the third Tuesday in May. A few states have rolling deadlines throughout the year depending on when your county completes its reassessment cycle. The safest approach is to check your state's deadline well before assessment notices are mailed, mark the date on your calendar, and file early. Filing early gives you more time to gather evidence. You do not need to have all your evidence ready when you file. In most states, you can submit your supporting documentation after the initial filing, up to or at the hearing itself. One more distinction worth understanding: whether your deadline is set at the state level or the county level. States like Missouri set a single statutory date that applies the same way in every county (the second Monday in July, per RSMo 138.010), so a St. Louis homeowner and a rural Ozarks homeowner file by the identical date. States like Georgia do the opposite: the deadline is 45 days from each county's own assessment notice, and because counties mail those notices on different schedules, two Georgia counties can have appeal deadlines weeks apart in the same year. Assuming your state works like the other type can cause you to watch for the wrong signal, either waiting for a notice that will never arrive in a fixed-date state, or missing a county-specific window because you assumed a statewide date applied.