How much capital gains tax will you pay when selling a home in Miami?

Florida charges no state capital gains tax, so the only tax on your home sale profit is federal. If the home was your primary residence for at least 2 of the last 5 years, you can exclude up to $250,000 of gain if single or $500,000 if married filing jointly. Gain above the exclusion is taxed at federal long-term rates of 0%, 15%, or 20% depending on your income, plus a possible 3.8% net investment income tax. Many long-time owners in Coral Gables, Pinecrest, and Coconut Grove have gains well past $500,000, so the real work is calculating your cost basis correctly before you assume you owe nothing.

By Giovanni Altamiranda | July 17, 2026

Here's the conversation I have with almost every long-time owner who's thinking about selling. They bought their Pinecrest or Coral Gables home somewhere between 2010 and 2015, they've watched the value double or triple, and somewhere between excitement and listing paperwork a quieter question shows up: what is the IRS going to take?

The good news is real. Florida has no state income tax and no state capital gains tax, which is one reason sellers here keep more than sellers in New York or California. The federal side is the only side, and the rules are more favorable than most people expect.

The catch is also real. With Coral Gables closed single-family sales running at a median around $2.0 million for the year through March 2026, and Pinecrest around $2.5 million over the same period, gains in these neighborhoods routinely blow past the exclusion limits. The sellers who get surprised aren't the ones who owe tax. They're the ones who never ran the math.

Let's run it.

Your taxable gain is not your profit at the closing table

The tax isn't charged on your sale price, and it isn't charged on the check you walk away with. It's charged on your gain, and gain has a specific formula:

Gain = sale price − selling costs − adjusted cost basis

Each piece works in your favor if you track it:

• Selling costs include real estate commission, documentary stamp taxes, title-related charges you pay, and most other closing costs on the sale. On a $2.5M sale, these can easily total $150,000 or more, and every dollar reduces your gain.
• Adjusted cost basis starts with what you paid for the home, plus certain closing costs from your original purchase.
• Capital improvements get added to your basis. The new roof, the impact windows, the kitchen renovation, the pool, the addition, the seawall work. Repairs don't count, but improvements that added value or extended the property's life do.

Here's what that looks like for a married couple selling a Pinecrest home:

That taxable $680,000 is taxed at long-term capital gains rates, which top out at 20% federally, plus the 3.8% net investment income tax that applies to higher-income households. Worst case here is roughly $162,000. Painful, but far less than the $500,000-plus some sellers fear when they mentally tax the whole gain.

Now notice what the improvements line did. That $350,000 of documented renovation work saved this couple up to $83,000 in tax. If they'd kept no records and claimed no improvements, the IRS math gets worse for no reason. If you're even a few years away from selling, start a folder today with every invoice, permit, and contract from significant work on the house. It's the cheapest tax planning you'll ever do.

The $250K/$500K exclusion: who qualifies and how it works

The Section 121 exclusion is the reason most American home sellers owe nothing. The rules:

• Ownership and use test. You must have owned the home and used it as your primary residence for at least 2 of the 5 years before the sale. The two years don't need to be consecutive.
• $250,000 excluded if you file single, $500,000 if married filing jointly.
• Reusable. This isn't once in a lifetime. You can take it again on a future primary residence, as long as you haven't used it within the prior 2 years.
• Partial exclusions exist. If you sell before hitting two years because of a job relocation, a health issue, or certain unforeseen circumstances, you may qualify for a prorated exclusion rather than losing it entirely.

Two situations trip up sellers in this market specifically.

First, second homes and condos don't qualify. If you bought a Key Biscayne condo as a weekend place, the exclusion doesn't apply to it, because it was never your primary residence. Some owners move into a second property for two years before selling to qualify, but the rules for converted properties prorate the benefit, so talk to a CPA before counting on that play.

Second, long-time owners with big gains still owe on the overage. The exclusion caps at $500,000 no matter how long you've owned the home. A couple who bought in High Pines in 2005 and never sold has decades of appreciation stacked against a fixed exclusion. That's not a reason to stay put. It's a reason to know your number before you price the house.

If a 1031 exchange crossed your mind: those apply to investment property, not your primary residence. Different tool, different situation.

What this means when you're planning the sale

When I sit down with sellers, the tax math feeds directly into three decisions.

Your real net. The number that matters isn't the sale price, and it isn't even the proceeds after closing costs. It's proceeds after closing costs and taxes. I've broken down the closing cost side in what sellers pay at closing in Miami-Dade, and the capital gains layer sits on top of that. Together they tell you what you'll actually have available for the next purchase.

Your move-up budget. Most of my sellers are buying their next home in the same market. If the tax bill is $150,000, that's $150,000 not going into the down payment on the next house in Coral Gables or Palmetto Bay. Knowing it early keeps the buy-before-you-sell plan honest.

Your property tax picture. Capital gains tax and property tax are separate systems, and sellers sometimes conflate them. The capital gains bill goes to the IRS once. Your property taxes on the next home reset to its purchase price, softened by Save Our Homes portability if you use it. I've covered that whole system in Save Our Homes portability for Miami move-up buyers, and it belongs in the same planning conversation.

One timing note. There's no special Florida window or seasonal trick that changes the federal tax. What changes your bill is your income in the year you sell, whether you've documented your basis, and whether you meet the exclusion tests. A seller who retires in January and sells in March may land in a lower bracket than one who sells during a peak earning year. That's a conversation for your CPA, but it's worth having before you list, not after you close.

Frequently Asked Questions

Does Florida have a capital gains tax on home sales?

No. Florida has no state income tax and no state capital gains tax. The only tax on profit from selling your Miami home is federal capital gains tax, and it applies only to gain above your exclusion amount after your cost basis and selling costs are subtracted.

How do I avoid capital gains tax when selling my house in Miami?

Most sellers reduce or eliminate the tax three ways: qualify for the $250,000 single or $500,000 married exclusion by living in the home 2 of the last 5 years, add every documented capital improvement to your cost basis, and subtract selling costs like commission and documentary stamp taxes from the sale price. Gains above the exclusion can't be avoided outright for a primary residence, but income timing in the year of sale can affect your rate.

What counts as a capital improvement to my cost basis?

Work that adds value, extends the property's life, or adapts it to new uses: additions, kitchen and bath renovations, a new roof, impact windows, a pool, HVAC replacement, and similar projects. Routine repairs and maintenance don't count. Keep invoices and permits, because unproven improvements are the first thing to fall out of the math.

Do I pay capital gains tax if I sell my Miami home and buy a more expensive one?

Rolling proceeds into the next home doesn't defer the tax. That rule ended in 1997. Your gain is calculated on the home you sold regardless of what you buy next, with the $250K/$500K exclusion applied if you qualify. The old "buy up and defer" rule is one of the most persistent myths I hear from sellers.

How much is federal capital gains tax on a home sale?

Long-term rates are 0%, 15%, or 20% depending on your taxable income, and higher-income households may also owe the 3.8% net investment income tax on the taxable portion. Gains qualify as long-term if you owned the home for more than a year, which covers nearly every primary residence sale.

Know your number before you list

The takeaway: Florida sellers keep more than sellers almost anywhere else, but in neighborhoods where a decade of ownership can mean seven figures of appreciation, the federal bill on the amount above your exclusion is real, and it's knowable in advance. Basis records, selling costs, and the exclusion tests decide most of it.

This is exactly the kind of math I work through with sellers before we ever talk list price, because your real net drives every other decision in a move-up plan. If you're thinking through this for your own situation, I'm happy to walk you through it. No pitch, just a straight conversation. Schedule a free consultation at moveupmiami.com.

About Giovanni Altamiranda
Giovanni Altamiranda is a Miami-native real estate advisor at LUXE Properties, a team that closes over $1 billion in annual sales volume, and a licensed loan officer with Columbus Capital. With 11 years of experience and designations including SRS, ABR, and RENE, Gio specializes in the southern Miami suburbs: Coral Gables, Coconut Grove, Pinecrest, South Miami, Palmetto Bay, Key Biscayne, and surrounding neighborhoods. He works exclusively with move-up buyers and relocating families in the $1M–$5M range, and is recognized as a top agent on Zillow. Rather than pushing a transaction, Gio's approach is advisory, helping buyers and families work through the real tradeoffs so they can make the decision that's right for them, not just right now. Born and raised in Miami, he brings firsthand knowledge of the neighborhoods, commutes, and market dynamics that out-of-town agents can't replicate. His dual license as both advisor and loan officer means clients get a cleaner, faster transaction with no surprises at the closing table.

This content is for informational purposes only and does not constitute legal or financial advice. Consult a licensed professional for guidance specific to your situation.