Capital Gains Tax on a Miami Home Sale: A Guide for Sellers
Florida has no state income tax and no state capital gains tax -- which means you owe nothing to the state when you sell your home. Federal capital gains tax still applies to any gain that exceeds the primary residence exclusion: $250,000 for single filers, or $500,000 for married couples filing jointly. For most Miami luxury sellers, whose homes have roughly doubled in value since 2020, the gain often exceeds this threshold. The taxable portion above the exclusion is subject to federal long-term capital gains rates of 0%, 15%, or 20%, with an additional 3.8% net investment income tax potentially applying for high earners.
By Lynley Ciorobea | July 7, 2026
Most Miami sellers don't think seriously about the tax picture until they're already in a contract -- or worse, until they're at closing. That's not the right time to start the conversation.
If you bought a home in Coral Gables, Pinecrest, South Miami, or Coconut Grove anytime before 2020 and you're now thinking about selling, there's a reasonable chance your gain is large enough to generate a meaningful federal tax bill. Not because anything has gone wrong. Just because property values in these neighborhoods have roughly doubled in six years, and the primary residence exclusion -- $500,000 for a married couple -- doesn't absorb that much appreciation.
This post walks through how the federal capital gains rules actually work, what specifically affects your number, and why a short conversation with your CPA before you list is worth every minute. This is informational context, not tax advice -- your accountant needs to be part of any real planning.
Florida's Zero State Tax Is a Real Advantage
Start with the good news: Florida has no state income tax. That means no state capital gains tax, period. When you sell your home here, you owe nothing to the state on the proceeds.
That's not true in most other states. Compare:
California: state capital gains tax up to 13.3%
New York: up to 10.9%
New Jersey: up to 10.75%
Florida: 0%
On an $800,000 taxable gain (a realistic number for many Coral Gables sellers, as I'll show below), the difference between Florida and California is roughly $106,000 in state tax alone. For sellers who relocated here from the northeast or the west coast -- and a significant number of my clients have -- this advantage is already part of why they moved. For sellers who've been here for decades, it's simply the backdrop.
The catch: federal capital gains tax still applies to everyone, regardless of where they live.
How the Federal Exclusion Works -- and When It Runs Out
The IRS gives homeowners a meaningful tax break under Section 121 of the tax code: if you've owned your home and used it as your primary residence for at least two of the last five years, you can exclude up to $250,000 (single filers) or $500,000 (married filing jointly) of your gain from federal taxation.
For most sellers in most years, that covers the entire gain. But in a market where a Coral Gables home that sold for $800,000 in 2014 now trades at $1.9 million -- and where the median in the Gables has risen 22.7% in the past year alone -- the exclusion doesn't always reach far enough.
Here's what the math looks like for a realistic Coral Gables scenario:
A married couple bought a home in 2012 for $750,000. Over fourteen years, they put $150,000 into capital improvements: a full kitchen renovation, a roof replacement, and an expanded primary suite. They're now selling for $2,400,000.
Adjusted cost basis: $750,000 + $150,000 = $900,000
Selling expenses (commission, doc stamps, attorney fees): approximately $175,000
Net amount realized: $2,400,000 - $175,000 = $2,225,000
Gain: $2,225,000 - $900,000 = $1,325,000
Less exclusion: $1,325,000 - $500,000 = $825,000 taxable
At a 20% federal long-term capital gains rate (the rate that applies to higher-income taxpayers), that's $165,000 in federal tax.
Again -- on a $2.4M sale with substantial equity, this doesn't change the overall picture dramatically. But it changes your net by enough to be worth planning for.
The two-years-in-five rule
To qualify for the full exclusion, you need to have owned the home and lived in it as your primary residence for at least two of the five years immediately before the sale. The two years don't have to be consecutive -- they just need to total 24 months within that five-year window.
If you've been in your home continuously, this isn't a question. But if you've moved out, converted the property to a rental, or spent significant time living elsewhere, the clock matters. A quick check with your CPA before you make any moves on the property is worth it.
The second layer most sellers don't know about
There's a federal tax that doesn't come up in most online guides: the Net Investment Income Tax (NIIT), a 3.8% surtax that applies to investment income -- including capital gains not excluded under Section 121 -- for taxpayers whose modified adjusted gross income (MAGI) exceeds $200,000 (single filers) or $250,000 (married filing jointly).
In the example above, the $825,000 taxable gain would likely be subject to the NIIT for a couple in this income range, adding approximately $31,000 to the federal bill.
Combined -- 20% long-term capital gains tax plus 3.8% NIIT -- the effective federal rate on that portion is 23.8%. On $825,000, that's about $196,000 in total federal taxes.
Is that a reason not to sell? Rarely. On a $2.4M sale, the net proceeds after tax and selling costs are still well over a million dollars. But knowing this number -- and knowing it before you sign a listing agreement, not after -- is the difference between a seller who's surprised at closing and one who isn't.
What Reduces Your Taxable Gain
Two things move your gain in a meaningful direction: a higher adjusted cost basis and selling expenses. Both reduce the amount you're taxed on.
Capital improvements increase your cost basis. These are permanent upgrades that add value or extend the useful life of your home. Specific examples that count:
Kitchen and bathroom renovations
Room additions or structural expansions
New roof replacement (not repair)
HVAC system replacement
Pool, deck, or outdoor living additions
Impact window and door replacements (especially common in Miami-Dade)
What does NOT count: routine maintenance, repairs to existing systems, cosmetic touch-ups, cleaning.
Documentation matters here. Many homeowners in Coral Gables, Pinecrest, and surrounding neighborhoods have invested significantly in their homes over the years -- and the records from those projects, if you can find them, can meaningfully reduce your taxable gain. Invoices, permits, contractor agreements, and bank statements all serve as documentation.
If you're uncertain what qualifies as a capital improvement versus a repair, your CPA can help you sort through it. The conversation is particularly valuable for sellers with older homes that have seen substantial renovation over the decades.
The Conversation Worth Having Before You List
The sellers who navigate this most smoothly are the ones who've spoken to their CPA before their home ever hits the market. Not the ones who start the conversation at closing.
A few specific questions worth bringing to that meeting:
What is my adjusted cost basis, factoring in all capital improvements?
Do I meet the two-of-five-year test for the primary residence exclusion?
What is my estimated taxable gain at the price range I'm targeting?
Does my income level put me in the NIIT threshold?
Are there any timing considerations worth discussing?
The answers won't change what the market will pay for your home. But they can inform your timeline, how you structure certain decisions around the sale, and your net-of-tax planning for what comes next.
I work through this regularly with sellers in Coral Gables, South Miami, Pinecrest, and Coconut Grove -- particularly those who've held their homes for a decade or more and are now sitting on significant appreciation. It's one of the first conversations worth having, and it's worth having early. If you're beginning to think through your own situation, feel free to reach out.
You may also find these posts useful as context:
How Much Will It Cost Me to Sell My Miami Home? -- a full breakdown of seller costs including commission, doc stamps, title fees, and attorney fees
What Happens After You Accept an Offer on Your Miami Home -- the full timeline from contract through closing, including the seller's obligations at each stage
Frequently Asked Questions
Do I have to pay capital gains tax when selling my home in Florida?
Florida itself charges no state income tax and no state capital gains tax, so you owe nothing to the state on the sale. However, federal capital gains tax still applies if your gain exceeds the primary residence exclusion ($250,000 for single filers, $500,000 for married couples filing jointly). The portion of your gain above that threshold is taxed at federal long-term rates of 0%, 15%, or 20% depending on your income.
What is the primary residence exclusion, and how do I qualify?
The Section 121 exclusion allows you to exclude up to $250,000 (single) or $500,000 (married filing jointly) of your home sale gain from federal taxes. To qualify, you must have owned the property and lived in it as your primary residence for at least two of the five years immediately before the sale. The two years don't need to be consecutive -- they just need to total 24 months within that five-year window.
Does the 3.8% net investment income tax apply to my home sale?
The NIIT applies to capital gains that aren't excluded under the primary residence rules, for taxpayers whose modified adjusted gross income (MAGI) exceeds $200,000 (single filers) or $250,000 (married filing jointly). If your gain exceeds the exclusion amount and your income is above that threshold, the NIIT adds 3.8% on top of your regular long-term capital gains rate. For luxury sellers in the Miami market, this is worth confirming with your CPA before you list.
What home improvements count toward reducing my capital gains tax?
Capital improvements -- permanent upgrades that add value or extend the life of your home -- increase your adjusted cost basis and reduce your taxable gain. Examples include kitchen and bathroom renovations, room additions, roof replacements, HVAC replacements, pool construction, and impact window installations. Routine repairs and maintenance do not qualify. Keeping documentation of all major projects (invoices, permits, contractor records) is worth the effort before a sale.
What happens if I haven't lived in my home for two years?
If you've owned the home but have not lived in it as your primary residence for at least two of the past five years, you may not qualify for the full exclusion. Partial exclusions are available in specific circumstances, such as a job relocation, health reasons, or certain unforeseen events. If you've rented the home or used it as a second property for a period of time, the nonqualified use rules may reduce the portion of your gain that's eligible for exclusion. Your CPA can help you understand where you stand.
Understanding the federal capital gains framework doesn't make the tax disappear -- but it puts you in a position to plan around it rather than react to it. Florida's no-state-tax advantage is genuine and significant. The federal piece is manageable when you go into the process with clear numbers.
If you're thinking about selling a home in Coral Gables, South Miami, Pinecrest, Coconut Grove, or Palmetto Bay and want to talk through the full financial picture, reach out -- I work through this with every seller I represent, and it's worth having the conversation before you do anything else.
About Lynley Ciorobea
Lynley Ciorobea is a Miami-born real estate professional known for helping homeowners successfully prepare, position, and sell their homes across Coral Gables, South Miami, Pinecrest, Palmetto Bay, and the surrounding southern Miami neighborhoods. Since 2007, she has built her business around thoughtful strategy, strong negotiation, and a marketing-first approach designed to help listings stand out in an ever-evolving market.
A true local, Lynley grew up in Pinecrest and graduated from Palmer Trinity School before attending Duke University, where she earned a BA in Psychology. Her deep roots in Miami give her a nuanced understanding of the architecture, lifestyle, and character that make each neighborhood distinct. From classic Old Spanish homes in Coral Gables to newer construction in South Miami and Pinecrest, she brings a local perspective that goes far beyond surface-level market knowledge.
Over the years, Lynley has naturally become a trusted resource for homeowners preparing to sell. Many of her clients come to her long before their home ever hits the market, looking for guidance on timing, pricing, improvements, and how to position their property thoughtfully. She approaches each listing as a strategic launch rather than a simple transaction, combining market insight, negotiation experience, and elevated marketing to help sellers move forward with clarity and confidence.
As the founder of the Lynley Residential Group, Lynley remains personally involved in every listing she represents. She leads each transaction from initial strategy through closing, ensuring that every detail — from pricing and preparation to storytelling and exposure — reflects the uniqueness of the home itself. Her work often centers on architecturally interesting properties and homes where thoughtful positioning can make a meaningful difference in outcome.
Throughout her career, Lynley has consistently ranked among the top real estate agents in Miami. She has been recognized as part of EWM's Chairman's Club, placing in the top 5% of the company; in 2022 she was honored as the #2 individual agent at the company overall with $37 million in annual sales; and she's a leader in Miami with Real Broker. With more than $100 million in career transactions and more than 60 5-star Google reviews, her experience spans a wide range of property types while maintaining a strong focus on seller representation in southern Miami.
Beyond her work with clients, Lynley is known locally for her market insight and community-focused content. Through her weekly newsletter, neighborhood videos, blog posts, and social media, she shares thoughtful perspectives on the Miami real estate market and the lifestyle that surrounds it. Her approach is informative without being overwhelming, offering homeowners a clear understanding of how market conditions affect real decisions.
If you're preparing to sell a home in Coral Gables, Coconut Grove, South Miami, Pinecrest, Palmetto Bay, or nearby areas, Lynley offers a local perspective shaped by experience, relationships, and a genuine understanding of what makes Miami homes so special. Learn more at lynleyresidential.com.