2026 Florida TRIM Notices Are Arriving: Why Your Property Taxes—and Mortgage Payment—May Go Up

If you own a home in Northeast Florida, your 2026 TRIM notice may have already arrived — and if it has, you may be wondering what it means for your property taxes and your mortgage payment. This article walks through what the notice is, why your taxes may be going up, and what to do before the deadline passes.

Your TRIM Notice Is Not Your Property Tax Bill

TRIM stands for Truth in Millage. The notice is sent each August by your county property appraiser and shows the proposed assessed value of your property and the estimated taxes based on proposed millage rates. It is not a bill — your actual tax bill comes later in the year. But it is your opportunity to review the numbers and contest them if something looks wrong.

Why Are Northeast Florida Homeowners Talking About Property Taxes Right Now?

St. Johns County began mailing 2026 TRIM notices on August 17, 2026. Clay County followed on August 24, 2026. Duval and Nassau County notices arrive on a similar schedule. If you have not received yours, check your county property appraiser's website directly.

Why Did My Florida Property Taxes Go Up?

Several factors can cause your property tax bill to increase even when you have homestead exemption. Millage rates set by local taxing authorities can increase. Your just (market) value can rise faster than the Save Our Homes cap protects. New non-ad valorem assessments for services like stormwater or fire can be added. And if you recently purchased your home, the previous owner's exemptions and assessment history do not transfer to you.

The Seller's Property Tax Bill Is Not Necessarily Your Property Tax Bill

This is one of the most common surprises for recent buyers. A seller who has lived in a home for 10 or 15 years may have accumulated significant Save Our Homes protection, holding their assessed value far below market. When ownership changes, Florida law generally requires the property to be reassessed to just value as of January 1 following the sale. That can mean a substantial jump in taxable value — and in your tax bill — in your first full year of ownership.

"But I Filed for Homestead. Doesn't That Protect Me?"

Homestead exemption helps, but it does not undo a reassessment in year one. It exempts a portion of your assessed value from taxation and makes you eligible for the Save Our Homes cap going forward — but that cap only limits future increases. It does not reduce an initial reassessment to market value.

Can Higher Florida Property Taxes Make My Mortgage Payment Go Up?

Yes, if your taxes are paid through an escrow account managed by your lender. Your monthly mortgage payment typically includes principal, interest, property taxes, and homeowners insurance (often called PITI). The principal and interest portion is fixed with a fixed-rate loan. But taxes and insurance can change. When they do, your lender performs an escrow analysis and adjusts your monthly payment accordingly.

Why Can the Payment Increase Feel Bigger Than the Tax Increase?

If your escrow account ran short in the prior year, your lender may spread that shortage across your future payments in addition to the higher ongoing tax amount. That is why the payment bump can feel larger than you expected based on the tax increase alone.

If You Just Bought Your Florida Home, Pay Extra Attention

Do not use the seller's current property tax bill as a guide for your future taxes. Check your county property appraiser's website for the assessed value assigned to your property after purchase, apply the current millage rate, and subtract applicable exemptions. A mortgage professional can help you run through the payment math if you want a clearer picture.

What Should I Check on My 2026 Florida TRIM Notice?

• Just or market value — does it reflect current market conditions accurately?
• Assessed value — is the Save Our Homes cap applied correctly if you are homesteaded?
• Taxable value — are your exemptions correctly applied?
• Your exemptions — is homestead listed? Any others you are eligible for?
• Proposed taxes — what is the estimated amount under each taxing authority?
• Non-ad valorem assessments — any new line items you do not recognize?
• Deadlines — when must you file a petition to contest the value?

2026 Northeast Florida TRIM Notice Deadlines

These deadlines are firm. If you believe your assessed value is incorrect, contact the Value Adjustment Board (VAB) for your county before the deadline shown on your notice.

What Does This Mean If You're Shopping for a Florida Home Right Now?

Ask for the current assessed value and the millage rate, not just the seller's current tax bill. Use those figures — plus the exemptions you will qualify for — to estimate what your taxes will look like after you close and reassessment occurs. A more accurate tax figure gives you a more accurate payment estimate before you commit.

Qualifying for the Mortgage Is Not the Same as Being Comfortable With the Payment

A lender qualifies you based on a debt-to-income ratio using estimated taxes. But if taxes jump significantly after closing, the actual payment may feel different than what you planned for. Building some cushion into your budget is a practical step, especially in a market where values have risen substantially.

What If Your Mortgage Payment Has Already Gone Up?

Review the escrow analysis letter your lender sent. It will show whether the change was driven by taxes, insurance, or a prior shortage. If the increase was due to taxes, confirm the assessed value on your county's property appraiser site looks correct. If you think there is an error, the TRIM notice deadline is your window to contest it.

The Bottom Line

Your TRIM notice is a tool, not a threat. It gives you the information to verify that your assessment is accurate, understand what your tax bill may look like, and contest it if the numbers are wrong. For recent buyers especially, it is worth a close look — your first full year of taxes may look different than what the seller was paying.