A lot of buyers misread the property tax picture when they start looking at Florida homes. They assume they’ll pay far more than they actually will, rule out homes with higher taxes too quickly, and never factor in how Save Our Homes can change the math. Sometimes that means settling for a house that is not the best fit simply because the tax bill looked more intimidating than it really was.
If you already own a Florida home with a homestead exemption, there’s a real chance you have a Save Our Homes benefit you haven’t fully factored into your next purchase. That benefit can follow you to your next home. Before you cross anything off your list, run the numbers first.
Property tax policies and millage rates change annually. The examples in this article reflect publicly available information as of 2026. Always verify current figures with your county property appraiser.
Key Takeaways
- The seller’s tax bill is not your starting point. When a home sells, the prior owner’s exemptions and assessment caps go with them. Your taxes reset.
- Save Our Homes limits annual assessed value increases while you’re homesteaded. That gap between market value and assessed value is what can transfer to your next home.
- Portability lets you carry up to $500,000 of that assessment difference to a new Florida homestead, which can lower your taxable value from day one.
- Moving up: you can transfer the full difference (up to $500,000). Moving down: the transfer is proportional.
- January 1 is the date that matters most, not your closing date. Your homestead status on that date sets your tax picture for the whole year.
- Each county has its own online estimator with its own limitations. Martin, Palm Beach, and St. Lucie all have tools, but know what they leave out.
- Portability doesn’t happen on its own. You have to apply with the destination county property appraiser by March 1 of the year after you establish the new homestead.
Why Can the Seller’s Tax Bill Mislead You?
When a Florida home sells, the property appraiser reassesses it, usually closer to market value, as of the following January 1. Any exemptions or assessment caps the seller had built up over the years don’t transfer to you.
So when you’re looking at a home where the owner has lived for 15 years, their tax bill might reflect a fraction of the home’s actual market value. That’s their history with that property. It has nothing to do with yours.
The good news is that your own history, specifically the Save Our Homes benefit you’ve built at your current home, can still work in your favor at the next one.
How Does Save Our Homes Portability Change the Math?
Save Our Homes (SOH) is a Florida law that caps how much your assessed value can increase each year while you’re homesteaded. That cap is 3% or the Consumer Price Index, whichever is lower, and for 2026 it came in at 2.7%. Over several years, that creates a gap between what your home is worth and what you’re actually taxed on.
That gap is your SOH benefit. And under Florida’s portability rules, you can take up to $500,000 of it with you when you move to a new Florida homestead.
Here’s a simple way to picture it. Say your current home has a just (market) value of $600,000 and an assessed value of $350,000. Your SOH benefit is $250,000.
Portability for an Equal or Higher-Value Home
If you’re buying a home at $900,000, you can carry that full $250,000 benefit with you. Before exemptions, your assessed value at the new home starts at $650,000 instead of $900,000. That’s a meaningful difference when it comes to what you’re actually taxed on.
The table below is a hypothetical illustration based on that Palm City departure scenario. These are not actual sales or guaranteed tax outcomes.
| Departure Point | New Just Value | SOH Benefit Ported | New Assessed Value (Pre-Exemption) |
|---|---|---|---|
| Palm City to Jupiter / Palm Beach Gardens | $900,000 | $250,000 | $650,000 |
| Palm City to Port St. Lucie | $480,000 | $200,000 | $280,000 |
Portability for a Lower-Value Home
Notice how the Port St. Lucie number is different. When you move to a lower-value home, the transfer is proportional, not dollar for dollar.
The formula: new just value ÷ prior just value × SOH benefit. So $480,000 ÷ $600,000 × $250,000 = $200,000 transferred. You’re still ahead, just not at the full amount.
When Should You Check Your TRIM Notice?
Your TRIM notice (Truth in Millage) is the annual document from your county property appraiser that breaks down your property’s market value, assessed value, exemptions, and estimated taxes. Most people file it away and forget about it. I’d encourage you not to.
I remind every client to pull their TRIM notice out twice: once when we list their current home, and again when we start shopping for the next one. That number can shift year to year, and I want clients to know exactly where they stand at both moments, not just one.
Before You List Your Current Home
Look for three lines on your TRIM notice: just (market) value, assessed value, and assessment reductions. The gap between just value and assessed value is roughly your SOH benefit. Write it down. That’s the number we’ll carry into the next conversation.
Before You Set the Next-Home Budget
Once you know what you can likely port, you can plug that into the destination county’s estimator and get a ballpark for the new home’s taxable value. Apply the homestead exemption, up to $50,000, on top of that, and you’re looking at a much more realistic tax picture than the seller’s bill would suggest.
One thing worth remembering: portability lowers your assessed value. It doesn’t touch your mortgage, your insurance, or any non-ad valorem assessments like drainage or solid waste fees. Those still need to be in your monthly budget.
Why Can January 1 Change Your Property Tax Estimate?
January 1 is the line in the sand for Florida property taxes. It’s the date that determines your homestead status and your assessment for the entire tax year. Close after January 1 and your first full year of homestead benefits typically won’t apply until the following tax year.
It also affects portability timing. Florida law gives you three tax years to establish a new homestead after abandoning the prior one. Miss that window and the benefit is gone.
One place people get caught off guard is closing near the end of the year. The difference between December 28 and January 7 isn’t just a week on the calendar. It can mean being in entirely different tax years for assessment and homestead purposes, and that can either cost you or save you real money depending on how the numbers fall.
If you’re selling and buying back-to-back near the holidays, please have this conversation before you lock in a closing date. It’s one of the most overlooked details in an end-of-year transaction, and it matters more than most people realize.
Which County Property Tax Tools Should You Use?
Each county in my market has its own estimator. They’re genuinely helpful starting points, but every one of them has fine print worth reading.
Martin County
The Martin County Property Appraiser’s portability calculator lets you enter your prior benefit and new property details to estimate what transfers. When you use the tax estimator alongside it, watch for excluded assessments like solid waste and drainage districts. Those show up on your actual bill but sometimes don’t appear in the tool’s output.
If you want a fuller picture of how the homestead exemption and Save Our Homes work for sellers specifically, I covered that in more depth in this article on Save Our Homes in Martin County.
Palm Beach County
Palm Beach County actually has two separate tools, and it’s easy to mix them up. The portability calculator estimates how much of your benefit transfers. The property tax calculator estimates your overall bill at a specific parcel. Use both together. The portability calculator gets you to your adjusted assessed value, then the tax calculator applies real millage rates for the exact location you’re considering.
St. Lucie County
The St. Lucie County tax estimator runs on prior-year millage rates and excludes non-ad valorem assessments. If the output looks off, or if you want to factor in a portability adjustment, call the office. Their staff can walk through the numbers with you, and that call is worth making before you finalize any budget assumptions.
No matter which county you’re in, every estimator will tell you in the fine print that these are estimates only. The official determination always belongs to the property appraiser.
Portability won’t make an overpriced home make sense. But it can make a home that looked out of reach look a lot more reasonable once your numbers are in the picture. Pull your TRIM notice, run the county estimator, and if you’re selling and buying at the same time, let’s talk through the timing before you choose a closing date.
Frequently Asked Questions About Save Our Homes
Can I Transfer Save Our Homes Portability Across County Lines?
Yes, Florida portability works statewide. You apply with the destination county property appraiser, who coordinates with the prior county to verify your benefit.
Can I Buy My Next Home Before I Sell My Current Homestead?
Potentially, but the homestead abandonment date, occupancy requirements, and filing all need to line up. Talk to your destination property appraiser before you close on the new home.
What If I Miss the March 1 Portability Deadline?
Contact the county property appraiser’s office as soon as you can. Some counties allow late filing under limited circumstances, but it’s not guaranteed.
How Is Portability Divided Between Spouses or Co-Owners?
Ownership share and prior designation both affect the calculation. If the property was jointly owned or only one spouse was on the prior homestead, the numbers change. Your property appraiser can walk through your specific situation.
Do County Tax Estimators Include Every Charge on the Tax Bill?
No. Most exclude non-ad valorem assessments like solid waste, stormwater, and special district fees. Always add those back in when you’re building a real monthly budget.