Picture two homes on the same Jacksonville street. Same square footage, same year built, same lot size. One owner bought in 2014 and has lived there ever since. The other listing next door just changed hands this spring. Pull the tax record on both, and the numbers will not match, sometimes by thousands of dollars a year, even though the houses are functionally identical.
That gap is not a mistake in the county's math. It is Florida's Save Our Homes cap doing exactly what it was built to do, and it is the single number every Jacksonville buyer needs to understand before comparing listings on price alone. This year, the story has an added layer: a proposed constitutional amendment on the November 2026 ballot could change how much of that tax bill exists at all, and the fight over its wording is still unfolding as this is written.
Why the Seller's Tax Bill Was Never Yours to Begin With
Florida's Save Our Homes amendment caps how much a homesteaded property's assessed value can climb each year, limiting the increase to 3 percent or the change in the Consumer Price Index, whichever is lower. Market value can jump 20 percent in a single hot year. The assessed value the county actually taxes cannot. Over a decade or two of Jacksonville's appreciation, the gap between what a home is worth and what it is taxed on can grow into real money.
That protection belongs to the person living in the home, not the address itself. Orange County's property appraiser, Amy Mercado, explained the mechanic to a Jacksonville television station this way: a homeowner who bought for $100,000 a decade ago and now owns a home worth $300,000 has spent those years paying tax on a number far below market value. The buyer who purchases that same home does not inherit the discount. As Mercado put it, that person is going to pay on the $300,000 mark because it resets as soon as you sell.
This is why relying on a current owner's tax bill to estimate your own carrying cost is one of the more common missteps buyers make here, not because anyone is hiding anything, but because the number on the listing sheet describes someone else's tenure, not yours. If you plan to make the home your primary residence, you can file for homestead exemption with the Duval County Property Appraiser by March 1 of the year following your purchase, which then starts your own Save Our Homes clock. Until that filing takes effect, your first year of ownership is taxed at the property's full assessed value, uncapped.
If you already own a Florida homestead and are simply trading up or down within the state, you are not starting from zero. Portability lets you carry up to $500,000 of your accumulated Save Our Homes savings to a new homestead, provided you file within three tax years of selling, according to Palm Beach County's Property Appraiser's office, which administers the same statewide rule Duval County does.
A Second Clock Is Running Alongside the First
Underneath that everyday mechanic sits a bigger, faster-moving story. On June 2, 2026, the Florida Legislature passed HJR 1-F, a proposed constitutional amendment titled "Save Our Homes From Excessive Property Taxes," sending it to the November 2026 general election ballot. If voters approve it by the required 60 percent margin, the homestead exemption on non-school property taxes would rise from its current level to $150,000 in 2027 and $250,000 in 2028, a schedule confirmed by News4Jax's coverage of the legislative vote. School district taxes are carved out and would continue to apply regardless of the outcome.
For context, Duval County's current 2026 homestead exemption already sits at $51,411, up from the flat $50,000 baseline because of a separate 2024 amendment that indexes part of the exemption to inflation, according to figures published for the county. A jump to $250,000 would be roughly five times that size, applied to every levy except schools.
The ballot language itself became news in its own right. On August 4, 2026, a Tallahassee judge ruled that the proposed summary voters would see was misleading, ordering the state to rewrite it. According to News4Jax's reporting on the ruling, the judge specifically objected to language suggesting the amendment would lead to full elimination of non-school homestead taxes, when the actual text only sets up a future process for local governments to expand exemptions further. Florida's attorney general has ten days from that ruling to submit revised language, which puts the rewrite squarely in mid-August, just as fall buying season picks up.
| Current law (2026) | If Amendment 3 passes | |
|---|---|---|
| Homestead exemption | $51,411 | $150,000 (2027), $250,000 (2028) |
| Applies to school taxes | Partially | No |
| Approval needed | Already in effect | 60% of Nov. 2026 voters |
| New FL residents after Jan. 1, 2027 | Standard exemption applies | Must wait five years for full exemption |
What Local Leaders Say the Trade-Off Actually Is
Jacksonville Mayor Donna Deegan has been the most visible local voice on the other side of the ledger. At a June 4, 2026 press conference, she urged residents to read the fine print, arguing the tax savings on any individual home would be outweighed by cuts to city services, according to the Jax Daily Record's coverage. She warned the burden would land unevenly, asking who gets hurt and answering that it would be the nurse whose rent will go up, pointing to landlords of non-homesteaded rental property passing higher tax bills through to tenants.
The numbers behind that warning are specific to Jacksonville. City Council auditors estimated the amendment would cost the city more than $300 million a year by fiscal year 2029, according to the same Jax Daily Record report, and if applied against Jacksonville's fiscal year 2026 budget, the cut would have run about $265 million. Statewide, the nonpartisan Florida Policy Institute put the amendment's recurring cost to local governments at roughly $12 billion, with legislative estimates showing $4.6 billion lost in the first year alone, per its ballot analysis.
The regional breakdown matters if you are comparing Northeast Florida counties. Duval and St. Johns counties would each lose an estimated 20.71 percent of their property tax base under the amendment, Nassau County would lose about 19.47 percent, and Flagler County roughly 26.28 percent, according to News4Jax's ruling coverage. Public safety groups, including the Florida Sheriffs Association, the Florida Professional Firefighters, and the Florida Fire Chiefs Association, have all come out against the measure, citing concerns about slower emergency response and stretched budgets, per the same report.
Public opinion is genuinely split. The University of North Florida's Public Opinion Research Lab polled 848 likely Florida voters between July 8 and 17, 2026, finding 45 percent in support and 47 percent opposed once respondents were told about potential municipal budget shortfalls of $11.8 billion over two years, according to Jacksonville Today's coverage of the poll. That is well short of the 60 percent threshold the amendment needs to pass.
The Wrinkle Relocation Buyers Tend to Miss
For anyone moving to Duval County from out of state, the amendment carries a timing detail worth knowing before you set a moving date. Under the proposal, anyone who establishes Florida residency on or after January 1, 2027, would need to maintain that residency for five years before qualifying for the larger exemption. Those who establish residency by December 31, 2026, would be eligible for the higher exemption whenever they later purchase and homestead a home, even if the actual purchase happens well after the deadline.
That distinction, drawn from an official amendment FAQ published by a Florida county property appraiser's office, means the residency clock, not the closing date, is what could matter most for someone still weighing when to make Jacksonville home. A few practical steps worth discussing with your closing team if you are relocating before the vote:
- Decide when you plan to establish Florida residency, since that date may matter more than your closing date under the proposed rules.
- If you close and homestead this year, mark March 1, 2027 as your filing deadline with the Duval County Property Appraiser.
- If you already own a homesteaded property elsewhere in Florida, ask about portability before you sell, since the three-year filing window starts at your old home's sale.
- Watch for the attorney general's revised ballot language, expected in mid-August 2026, since legal challenges to it could still change what voters see in November.
None of this is tax or legal advice, and your own bill depends on your specific parcel, your closing date, and how the ballot fight resolves. That is exactly the kind of number worth confirming with the Property Appraiser's office or your closing team before you write an offer, not after.
A Few Questions Worth Asking Before You Offer
Does any of this change what I owe right now? No. Current law stands until and unless voters approve the amendment in November 2026, and even then the changes would not begin until 2027.
If I'm already a Duval County homeowner just moving to a different home nearby, do I lose my savings? Not necessarily. Portability allows you to carry up to $500,000 of your accumulated Save Our Homes benefit to a new Florida homestead if you file within three tax years of selling.
What if the amendment fails? The current exemption structure, including Duval County's $51,411 for 2026, remains in place and continues adjusting for inflation under the separate 2024 amendment already in law.
Should I wait until after the election to buy? The Save Our Homes reset happens on every sale regardless of the outcome in November. Waiting changes what exemption you might eventually receive, not whether the reset itself applies to you.
Property tax mechanics rarely make for exciting reading, until the moment they show up as a bigger number than expected on your first bill. If you are weighing a purchase in Jacksonville, St. Johns County, or anywhere along the coast this fall, Donna S Osteen can walk through what a specific address's tax history actually means for your budget, well before you are standing at the closing table wondering why the number changed.
