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Each August, the county property appraiser mails homeowners their TRIM notice. “TRIM” stands for Truth in Millage, and the notice lists your property’s assessed value, any exemptions applied or removed, and the proposed tax rates used to calculate your property taxes for the coming year. Because this document directly affects how much you will pay, understanding it is critical—yet many homeowners overlook the TRIM notice and misunderstand its purpose.
At the top of every TRIM notice, bold, capitalized text reads: “DO NOT PAY. THIS IS NOT A BILL. TAX COLLECTOR WILL MAIL TAX BILLS IN NOVEMBER.” That warning often causes people to stop reading and toss the notice aside—a potentially costly mistake. Even though the TRIM notice is not a bill, it starts the clock on your one opportunity to challenge your property’s assessed value, dispute the removal or denial of an exemption (such as homestead, widow, disability, or senior), or contest a change in classification (for example, agricultural or nonprofit use).
Florida law gives homeowners only twenty‑five (25) days from the mailing date of the notice—not the date of delivery—to dispute any potential errors. During this window, you may request an informal review with the property appraiser’s office to discuss your concerns, or you may file a written petition with the Value Adjustment Board (VAB). The informal review can sometimes resolve issues without a hearing, but it does not pause or extend the twenty‑five‑day deadline. If the informal meeting does not fully resolve your concerns, you must file a petition within that same 25‑day period to preserve your right to a formal challenge; the informal review itself does not do that.
Practically speaking, by the time the TRIM notice arrives in your mailbox, you are typically left with less than three weeks to act (the exact filing deadline is printed in the notice). Although the property appraiser may accept a late petition for “good cause,” there is no guarantee it will be allowed, and missing the deadline generally means losing your right to a formal challenge for that year.
And, once your official tax bill arrives in November, the petition deadline has already passed and the assessment is effectively final, even if you disagree with it. To protect yourself, make it a habit each August to promptly review your TRIM notice—whether online or by mail—and, if something looks wrong, take action within the 25‑day window by requesting an informal review, filing a petition, or both.

Amy handles residential and commercial real estate transactions as well as property tax challenges. She can be contacted at [email protected] or 941-536-2029.