Portability: Taking Your Save Our Homes Savings to the Next Florida House

A Gap Worth Keeping

Ruth and Ken bought their Port Orange home in 2004. Over the next two decades, Port Orange values climbed steadily, and by July 2026 the Zillow Home Value Index put the typical home there at $340,000. Their assessed value, however, had been held in check every year by Florida's Save Our Homes cap, which limits annual increases in a homesteaded property's assessed value to 3 percent or the change in the Consumer Price Index, whichever is lower. The result: a meaningful gap between what the market says their home is worth and what the Volusia County Property Appraiser uses to calculate their tax bill. They were about to sell and move to a newer house in Palm Coast, where the Zillow Home Value Index put the typical value at $345,000 (July 2026). Their first question was whether that gap would simply vanish at closing.

It does not have to. Florida's portability law, codified at F.S. 193.155(8), lets a homeowner carry that accumulated Save Our Homes benefit to a new Florida homestead, up to a ceiling of $500,000. Ruth and Ken are a composite example, not actual clients, but their situation mirrors what many long-tenured Florida homeowners face when they decide to move.

Step One: Understand What the "Differential" Actually Is

The differential is simply the dollar spread between a property's just (market) value and its capped assessed value at the time the owner leaves the homestead. If a home's just value is $400,000 and its assessed value is $220,000 because of years of Save Our Homes protection, the differential is $180,000. That is the figure the law allows a seller to carry to the next homestead.

For Ruth and Ken, the exact figures belong to their Volusia County property appraiser's records, but the concept applies directly. Every year the 3-percent cap holds their assessment below rising market values, that gap grows. After 22 years of homestead ownership, their differential could easily be substantial. Losing it by abandoning homestead status without claiming portability would reset their new Palm Coast property's assessed value to full just value on January 1 of the first tax year after purchase, producing a noticeably higher tax bill.

Step Two: Know the $500,000 Ceiling

Florida law caps the transferable benefit at $500,000. If a homeowner has accumulated a differential of $600,000, only $500,000 travels to the new homestead. The excess simply disappears. For most homeowners outside the highest-value coastal markets, the cap is not a practical obstacle, but it is worth checking before assuming the entire differential is portable.

Step Three: Upsizing Versus Downsizing, the Math in Plain English

The outcome depends on whether you are buying up or buying down in value.

• Upsizing or buying at the same price point: When the new home's just value equals or exceeds the old home's just value, the full differential transfers. The new assessed value equals the new home's just value minus the entire differential (subject to the $500,000 cap). Ruth and Ken are moving from a Port Orange home with a typical market value of $340,000 to a Palm Coast home in the $345,000 range. Because they are moving to a roughly equivalent or slightly higher price point, they can expect to carry their full differential to the new property.
• Downsizing: When the new home's just value is less than the old home's just value, only a proportional share of the differential transfers. The formula divides the new home's just value by the old home's just value and multiplies that fraction by the differential. A homeowner moving from a $400,000 home to a $200,000 home, for example, would carry only 50 percent of the differential. The proportional rule prevents portability from producing a negative assessed value on a cheaper replacement property.

Because Ruth and Ken are moving to a home of similar value, the proportional reduction likely does not apply to them. That said, the property appraiser in Flagler County will run the actual calculation, and I always recommend asking a CPA or tax professional to verify the resulting assessed value and projected tax savings before closing on the new purchase.

Step Four: The Three-Year Window After You Sell

This is where many sellers make a costly mistake: they assume they have to buy immediately. They do not, but the clock is real.

Florida Amendment 5, approved by voters in 2020 with 74.49 percent in favor, extended the portability window from two years to three. Under the current rule, the window is measured from January 1 of the year in which the prior homestead last qualified for the exemption.

For 2026 sellers: if Ruth and Ken close the sale of their Port Orange home at any point during 2026, the homestead exemption stays with that property through December 31, 2026. The last qualified homestead exemption date is treated as January 1, 2026. They therefore have until January 1, 2029, to establish a new Florida homestead and claim portability on the Palm Coast property. Missing that date means the differential is gone permanently.

The practical lesson is to calendar the deadline the day you sign a listing agreement, not the day you start shopping for the next house.

Step Five: The Application, Form DR-501T, and Crossing County Lines

Two forms are required. Form DR-501 is the standard Homestead Exemption application for the new property. Form DR-501T is the Transfer of Homestead Assessment Difference, and it is the document that actually requests portability. Both must be filed with the property appraiser in the county where the new home is located. The filing deadline for both forms is March 1 of the first tax year for which you want the benefit to apply.

Ruth and Ken are moving from Volusia County to Flagler County, so they will file both forms with the Flagler County Property Appraiser's office, not Volusia. The Flagler County office will then contact the Volusia County Property Appraiser to verify the prior homestead's just value and assessed value. Moving across county lines does not disqualify portability; it simply requires coordination between two offices. Homeowners who have moved between any two Florida counties, from Ormond Beach to DeLand, from New Smyrna Beach to Palm Coast, from anywhere to anywhere in the state, all follow the same cross-county process.

One administrative note: the DR-501T form transfers the Save Our Homes benefit only. It does not transfer the homestead exemption itself. That is why the separate DR-501 is mandatory. Filing one without the other will cost you the benefit.

A Note on Divorcing Spouses

F.S. 193.155(8) also addresses portability when a homestead is split between divorcing spouses. Each spouse may receive a proportional share of the accumulated differential based on their ownership interest, and each may apply that share to a new qualifying homestead. The mechanics are more involved than a straightforward sale-and-purchase, and either spouse navigating that situation should work directly with the relevant property appraiser's offices and their legal counsel.

What This Meant for Ruth and Ken

Ruth and Ken had owned their Port Orange home through two decades of steady appreciation. Their Save Our Homes differential represented real money, the kind of ongoing annual tax savings that compound over time and make a meaningful difference to a couple living on retirement income.

By selling in 2026, they have a window that stays open until January 1, 2029. Their Palm Coast purchase at a price comparable to what they sold eliminates the proportional reduction concern entirely, meaning they can expect to carry the full differential to the new assessed value, subject to the $500,000 statutory cap. They need to file Form DR-501 and Form DR-501T with the Flagler County Property Appraiser by March 1 of the first tax year following their purchase. If they close in late 2026, that deadline is March 1, 2027.

Understanding how real estate commissions work in Florida after the NAR settlement helped them budget their selling costs accurately, and pairing that knowledge with a clear picture of their portability benefit gave them a realistic view of their net position on both sides of the transaction.

The bottom line: the savings Ruth and Ken spent 22 years building do not have to stay behind in Volusia County. With the right paperwork filed in the right county by the right deadline, those savings move with them to Palm Coast.

Talk to a Professional Before You List

Every seller's differential is different, and the proportional reduction formula can produce surprising results in certain price-range combinations. Ask a CPA or tax professional to model the projected assessed value and annual tax obligation on the new property before you commit to a purchase price. Your property appraiser's office can also provide an informal estimate.

As an attorney-REALTOR® who works with buyers and sellers throughout Volusia and the surrounding region, including Ormond Beach, Port Orange, New Smyrna Beach, DeLand, and Daytona Beach, I help clients build portability planning into the overall transaction strategy from the start, not as an afterthought at closing.

To discuss your situation or explore homes in the Palm Coast and Flagler County area, visit arthursimpson.com or reach out directly. Knowing your numbers before you list is the best first step you can take.

Arthur Simpson, Esq., CIPS, is an Attorney and REALTOR® (sales associate) with Realty Pros Assured in Ormond Beach, Florida, and principal attorney of Truestead Law, LLC. This article is for general informational purposes only and does not constitute legal or tax advice. Consult a qualified attorney or CPA for guidance specific to your circumstances.