Every August, a document arrives in the mail that shapes what South Florida property owners will pay in taxes for the year ahead. Most people glance at the bottom number, wince or shrug, and file it away.
That document is your TRIM notice, and it deserves about ten minutes more attention than it usually gets. Here’s how to read a TRIM notice section by section, which numbers actually drive your bill, and what’s worth checking before the response window closes.
If you’re not sure what a TRIM notice is or why you receive one, start with our earlier guide, What Is a TRIM Notice and What Should You Do When Yours Arrives. This article picks up where that one leaves off: the notice is in your hands, and you’re looking at the numbers.
First, what this document is and isn’t
TRIM stands for Truth in Millage. The notice is mailed by your county property appraiser in August, and despite how it looks, it is not a bill. It’s a preview: the value the county has assigned to your property, the tax rates local authorities are proposing, and what your bill will look like if none of it changes.
That last part matters. The TRIM notice is the one moment in the year when the county shows you its math before the math becomes your bill. The window to respond is short. In most cases, a petition must be filed within 25 days of the notice mailing, and the exact deadline is printed on the notice itself. Find that date first.
The three values, and which one you can challenge
Near the top of the notice, you’ll find your property’s values. There are usually three, and they are not interchangeable.
Market value (sometimes called just value) is what the county believes your property would sell for on the open market as of January 1 of this year, less a net proceeds adjustment. This number is the county’s estimate, formed through mass appraisal: thousands of properties, one model, one pass. It is also the number that can be challenged.
Assessed value starts from market value but may be limited by caps. Homesteaded properties are protected by Save Our Homes, which limits how much the assessed value can increase each year, and most non-homestead properties carry a cap of their own. If you’ve owned your property for years, assessed value may sit well below market value, and that gap is normal.
Taxable value is assessed value minus your exemptions. This is the number your tax rate is actually applied to.
When people ask whether their taxes can be appealed, this is the distinction that matters: the millage rates set by the county and taxing authorities are not appealable. The market value the county assigned to your property is. If that number doesn’t reflect what your property would realistically sell for, that’s where a case begins.
Check your exemptions
Below the values, the notice lists the exemptions applied to your property: homestead, senior, disability, and others. If you’re entitled to one that isn’t showing, your taxable value is higher than it should be.
What to do next depends on why it’s missing. A clerical error on the county’s end can often be corrected by contacting the property appraiser directly.
A denial is different. Denial notices go out by July 1, and the deadline to petition is 30 days from the date that notice was mailed. That clock is separate from the 25-day TRIM window, and it may already be running.
If you never applied, the March 1 deadline has passed. Your remaining option runs through the same 25-day window.
Take thirty seconds to confirm the list matches your situation. If it doesn’t, move quickly
The columns: what you paid, what’s proposed, and what if nothing changed
The middle of the notice compares your taxes across scenarios: what you paid last year, what you’d pay this year under the proposed rates, and what you’d pay if the taxing authorities made no budget changes. Each taxing authority (county, city, school board, and others) gets its own line, along with the dates of the public hearings where those proposed rates will be finalized.
If your proposed taxes jumped, this section tells you why. A higher market value, a lost exemption, and a raised millage rate all look the same at the bottom of the page but lead to very different responses. Rate increases are addressed at the public hearings listed on the notice. Value problems are addressed through an appeal.
What to actually check, in order
If you do nothing else with your notice, check these four things:
- The deadline. Printed on the notice. The response window is 25 days from mailing, and you should not count on an extension.
- The market value. Would your property genuinely sell for that number today? If it’s clearly above what recent sales in your area support, or if it ignores conditions specific to your property, the county’s model may have missed something.
- Your exemptions. Confirm everything you qualify for is listed.
- The year-over-year change. Understand whether the movement came from value or from rates, because the remedy is different for each.
If a number looks wrong
Disagreeing with the county’s value doesn’t have to mean going it alone. In Florida, the appeal runs through a petition to the Value Adjustment Board, supported by evidence: comparable sales, income data, condition documentation. Building that case is what we’ve done for South Florida property owners since 1984.
Florida Property Tax Service reviews assessments at no cost. If the county’s number holds up, we’ll tell you. If there’s a case worth making, we handle the entire process. If there’s a case worth making, we handle the entire process. We only charge a percentage of what we save you, so if we don’t save you money, you don’t pay.
Owners of business equipment should note that tangible personal property assessments arrive on their own notice and can be challenged the same way.
Your TRIM notice arrives once a year, and the window it opens is short. Ten minutes of reading it properly is the best protection a property owner has.
Contact us if a number on your notice doesn’t look right. We’ll help you figure out whether it’s worth questioning.