Selling the Old Home After Moving to Florida: How Long Before You Lose the Capital Gains Exclusion?

Patricia's Clock Is Already Ticking

Patricia, 64, packed up her Connecticut home in the spring of 2025 and settled into a bright new chapter in Palm Coast. She loves the weather, the low taxes, and the slower pace along the Intracoastal. But her Connecticut house is still sitting there, occupied by a tenant paying rent while Patricia figures out her next move. That arrangement feels comfortable right now. What Patricia may not realize is that a federal deadline is quietly counting down, and missing it could cost her tens of thousands of dollars. (Patricia is a composite illustration, not an actual client.)

The Rule in Plain English: IRC Section 121

Under 26 U.S.C. Section 121, a homeowner can exclude from gross income up to $250,000 of capital gain on the sale of a principal residence, or up to $500,000 for a married couple filing jointly. To qualify, the seller must have owned the home and used it as a principal residence for at least two of the five years ending on the date of sale. That is the two-of-five-year rule, and it is the foundation of everything that follows.

The two years of ownership and the two years of use do not have to run at the same time, and they do not have to be consecutive. They simply have to add up to at least 24 months within the five-year window that ends on the closing date. The exclusion can generally be used only once every two years, so timing matters on that front as well.

Here is the critical point for someone in Patricia's position: the five-year lookback window moves with the sale date. It does not freeze the moment she left Connecticut. Every month she waits, the window slides forward, and the months she actually lived in the house are slowly falling out of the back end of that window.

The Five-Year Countdown for Florida Transplants

Suppose Patricia lived in her Connecticut home from 2015 through April 2025, roughly ten years. As of her move date, she had far more than two years of qualifying use. She was comfortably inside the exclusion zone. But that comfort has a shelf life.

If she sells the house before April 2027, the five-year lookback window will still reach back to a time when she was living there, and she will likely satisfy the two-year use test with ease. If she waits past that point, the window no longer touches any period during which she occupied the home as her principal residence, and the exclusion disappears entirely.

That is not a Florida rule. It is federal tax law applying equally to sellers in Ormond Beach, Palm Coast, Port Orange, and every other city in the country. But it hits Florida newcomers especially hard because the excitement of the move can distract from what is happening to the old property back home.

What Renting Does to the Equation

Renting out the Connecticut house, as Patricia is doing, introduces two separate complications beyond the simple countdown.

The first is nonqualified use. Periods during which the home is rented out and not used as a principal residence are generally treated as nonqualified use under Section 121. Gain attributable to periods of nonqualified use after 2008 is not eligible for the exclusion. The IRS calculates this on a proportional basis. If Patricia rents the home for two years before selling and owned it for twelve years total, a portion of the gain equal to roughly two-twelfths of the total appreciation will be taxable regardless of the exclusion. The longer the rental period, the larger that taxable slice becomes.

The second complication is depreciation recapture. When a property is rented out, the owner is generally required to take depreciation deductions on the structure. When the home is eventually sold, the IRS requires that any depreciation taken (or that could have been taken) be recaptured and taxed as ordinary income, currently at a maximum rate of 25 percent. The exclusion under Section 121 does not shelter depreciation recapture. Even if Patricia qualifies for the full exclusion on her appreciation gain, she will still owe tax on every dollar of depreciation she claimed during the rental period. Patricia should keep meticulous records of those deductions and work closely with her CPA to understand exactly what recapture exposure she is building.

Partial Exclusions: A Safety Valve, Not a Full Solution

What if Patricia misses the deadline entirely or does not quite meet the two-year threshold? Section 121 does provide for a partial exclusion in certain situations, including a change in place of employment, health reasons, or other unforeseen circumstances. However, the partial exclusion is calculated as a fraction of the full exclusion amount based on how much of the two-year requirement was actually satisfied. It is a genuine benefit in the right circumstances, but it is not a substitute for planning ahead and selling while the full exclusion is still available. An attorney familiar with federal tax law should evaluate whether any partial exclusion applies before a seller simply assumes the exclusion is lost.

Connecticut Will Still Want Its Share

One detail that catches many new Floridians off guard: Florida's absence of a state income tax is one of the great financial advantages of living here, but it does not extend retroactively to gains on property located in other states. Connecticut, like most states, taxes the capital gain realized by a nonresident seller on the sale of Connecticut real property.

When Patricia sells her Connecticut home, Connecticut will assert the right to tax the gain under its nonresident income tax rules. She will file a Connecticut nonresident return for the year of sale and pay Connecticut tax on the portion of gain that Connecticut treats as Connecticut-source income. The federal exclusion reduces the amount of gain subject to federal tax, but it does not eliminate Connecticut's separate calculation. Patricia may also be subject to Connecticut's real estate conveyance tax at closing, which is collected from the seller based on the sale price.

The good news is that Florida will not pile on. As a Florida domiciliary with no Connecticut domicile, Patricia owes Florida nothing on that gain. No state income tax, no state capital gains tax, no state estate or inheritance tax. Her Florida residency, properly established with a recorded Declaration of Domicile under Florida Statutes Section 222.17 and supported by her homestead exemption application with the Flagler County property appraiser, creates a clean Florida tax picture even while the old state takes its portion of the sale proceeds.

What This Meant for Patricia

Working through the timeline, Patricia moved to Palm Coast in April 2025. She lived in her Connecticut home as her principal residence through that month. Her five-year lookback window, measured from any sale date she chooses, will stop including those years of occupancy once the sale date moves past April 2030, but the practical deadline is much earlier. She needs the window to still capture at least 24 months of qualifying use.

If Patricia sells on or before approximately April 2027, she should satisfy the use test comfortably, assuming no other disqualifying events. Every month she delays past that point increases her risk. If she cannot or does not want to sell by that date, she should sit down with a tax professional well before the deadline to quantify exactly how much exclusion she stands to lose, evaluate the nonqualified use calculation, account for depreciation recapture exposure already building month by month, and determine whether a sale now or a sale later produces the better net outcome after all applicable taxes.

The rental income feels like a benefit, and in isolation it is. But Patricia is potentially trading a $250,000 federal tax exclusion for a stream of rental checks that will not come close to replacing it. She also owes Connecticut income tax on that rental income as a nonresident. The math is not automatically in favor of waiting.

Patricia is not alone in this situation. Many of the clients I work with through Realty Pros Assured in Ormond Beach, and in conversations with buyers considering Palm Coast, Port Orange, DeLand, and New Smyrna Beach as their new Florida home base, have a property up north in exactly this limbo. The move south was the right decision. The question is just whether the old house gets sold at the right time to match it.

Ready to Talk Through the Timeline?

If you have recently moved to the Volusia or Flagler County area and still own a home in another state, the two-of-five-year clock is a conversation worth having now rather than later. As an attorney and REALTOR® with Realty Pros Assured, I can help you think through the real estate side of this decision and coordinate with your tax advisors on the federal and multistate tax picture.

Visit arthursimpson.com to schedule a consultation or to read other articles in this series on making your Florida residency official and financially sound.

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