The question comes up in almost every listing consultation we have: “Are we going to owe taxes on what we made?”

It’s a fair question. Austin home values have climbed substantially over the past decade, and sellers who bought five or ten years ago are walking away with significant equity. The assumption that a big payday means a big tax bill is understandable. It’s also, for most sellers, wrong.

Here’s what you actually need to know before you decide to list.

Texas Has No State Capital Gains Tax

Start here, because it matters: Texas has no state income tax. No state income tax means no state capital gains tax. The money you make selling your Austin home is not taxable at the state level, period.

This is one of the real financial advantages of owning property in Texas. Sellers relocating to states like California, New York, or Illinois won’t have this protection going forward. Every dollar of gain on your Austin sale starts from a more favorable position before the federal question enters the picture at all.

The Section 121 Exclusion: Why Most Austin Sellers Owe Nothing

At the federal level, the IRS offers a substantial tax break for homeowners selling a primary residence. It’s called the Section 121 exclusion, and it’s the reason most Austin sellers walk away without any capital gains bill.

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 from your taxable income:

• Up to $250,000 in gains if you’re single
• Up to $500,000 in gains if you’re married filing jointly

The two years don’t need to be consecutive. You could have traveled, rented the property for a period, or split time between homes, as long as you meet the ownership and use tests over that five-year window. The exclusion resets and can be used once every two years.

Here’s a real-world example: a married couple who bought a home in Mueller in 2019 for $480,000 and is selling today for $795,000 has a gain of roughly $315,000. That’s fully excluded. Zero federal tax owed.

Your actual taxable gain is probably lower than you think. The most common mistake sellers make is comparing their sale price to their original purchase price and stopping there. That’s not how the IRS calculates your gain.

Your taxable gain is your net sale proceeds minus your adjusted cost basis. Your adjusted cost basis is higher than what you paid at closing. It includes:

• Your original purchase price
• Closing costs you paid when you bought (title fees, origination fees, recording costs)
• Capital improvements made during your ownership: a new roof, a room addition, a pool, a full kitchen remodel, HVAC replacement. Permanent upgrades that add lasting value count. Routine maintenance, landscaping upkeep, and minor repairs don’t.

Your net proceeds from the sale are also reduced by what you pay to sell: agent commissions, your share of closing costs, and any seller-paid repairs negotiated in the contract.

By the time you run the full calculation, your actual taxable gain is usually meaningfully lower than a quick estimate suggests. Before you assume you have a problem, do the actual math. Many sellers who think they’re over the threshold discover they’re not.

When Austin Sellers May Owe Federal Capital Gains Tax

The exclusion doesn’t apply in every situation. Here’s when you may have real tax exposure to plan around.

Your gains exceed the exclusion limit. If you purchased a home in Tarrytown or Barton Hills a decade ago and your equity has grown well past $500,000, the amount above the exclusion threshold is taxable. This is most relevant for Austin’s long-tenured luxury sellers, where a home purchased for $700,000 in 2013 may sell for over $2 million today. If that describes your situation, our guide on selling a luxury home in Austin covers the additional considerations worth thinking through.

You’re selling a rental or investment property. The Section 121 exclusion only applies to your primary residence. If you’ve been renting the property out and haven’t lived there as your main home for the required two years, you won’t qualify. Your entire gain becomes taxable at the federal level, and you may also owe depreciation recapture on top of that, which is taxed at a different rate. If you’re still weighing whether to keep a property as a rental or sell it, our breakdown of the sell vs. rent decision walks through the financial math in detail.

You haven’t met the two-year requirement. If you’ve owned your home less than two years, or were living elsewhere for most of that period, you may not qualify for the full exclusion. There are partial exclusion provisions for specific hardship situations (job relocation, certain medical circumstances, unforeseen events), but you’ll want a CPA’s guidance to navigate those correctly.

You used the exclusion recently. The IRS limits you to one primary residence exclusion every two years. If you sold another home and claimed the exclusion in the past 24 months, this sale may not qualify for the full exclusion.

If you do have taxable gains, here are the federal rates for 2026. As long as you’ve owned the property more than one year, any taxable gain is treated as a long-term capital gain, which carries significantly lower rates than ordinary income:

• 0% if your adjusted gross income is under $47,025 (single) or $94,050 (married filing jointly)
• 15% for most sellers, up to $518,900 (single) or $583,750 (married filing jointly)
• 20% for very high earners above those thresholds

If your adjusted gross income exceeds $200,000 as a single filer or $250,000 married, an additional 3.8% Net Investment Income Tax (NIIT) may apply on the portion of gains above those income levels. This catches some sellers by surprise if they’re not aware of it going in.

For most Austin sellers who have any taxable gain at all, the 15% bracket applies to whatever portion exceeds the exclusion. That’s still significantly less than ordinary income tax rates.

One timing note worth considering: if you’re close to the two-year mark on either ownership or primary residence use, waiting a few months before listing can make the difference between zero tax liability and a meaningful bill. It’s worth running that calculation before you set your timeline. And when you’re ready to think through pricing alongside your projected net proceeds, our guide on how to price your Austin home in 2026 is a good starting point for the current market.

Frequently Asked Questions

Does Texas have a capital gains tax on home sales?

No. Texas has no state income tax, which means there is no state capital gains tax. Any tax owed on an Austin home sale gain comes exclusively at the federal level. This is one of the real financial advantages of selling property in Texas compared to states that impose both state income tax and capital gains tax on real estate proceeds.

How do I qualify for the Section 121 capital gains exclusion?

You must have owned the home and used it as your primary residence for at least two of the last five years before the sale date. The two years don’t need to be consecutive. Single filers can exclude up to $250,000 in gains; married couples filing jointly can exclude up to $500,000. You can use the exclusion once every two years.

What counts as a capital improvement that increases my cost basis?

Capital improvements are permanent upgrades that add value or extend your home’s useful life: adding a room or second story, replacing a roof, installing a pool, upgrading the HVAC, or finishing a basement. Routine maintenance like painting, landscaping upkeep, and minor repairs don’t qualify. Keeping documentation of major improvements over your years of ownership can meaningfully reduce your taxable gain if you ever need to calculate it.

Do I owe capital gains tax if I’m selling a rental property in Austin?

Yes, most likely. The Section 121 exclusion applies only to primary residences. If you’re selling an investment property or a home you’ve been renting out, the full gain is generally subject to federal capital gains tax. You may also owe depreciation recapture, taxed at its own rate. A CPA should be part of any investment property sale before you close.

What are the federal capital gains tax rates for a home sale in 2026?

For gains that exceed the Section 121 exclusion, the taxable portion is taxed at long-term capital gains rates: 0% for lower-income filers, 15% for most sellers, and 20% for very high earners. If your adjusted gross income exceeds $200,000 (single) or $250,000 (married), a 3.8% Net Investment Income Tax may also apply. These rates apply only to the amount above the exclusion threshold, not to your total sale proceeds.

For the vast majority of Austin sellers, the answer to “do I owe capital gains tax?” is no. Texas protects you at the state level, and the federal Section 121 exclusion covers most primary residence gains. The situations that create real exposure are specific: gains well above the exclusion, investment properties, or not meeting the two-year rule.

Your exact number depends on your purchase price, the improvements you’ve made, your income in the year of the sale, and your timeline. If you want to think through your net proceeds before you decide to list, we’re glad to walk through it with you. Reach out anytime at munozaustin.com/connect.

About Muñoz Group at Compass
The Muñoz Group at Compass is an Austin-based real estate team with 600+ transactions and $675M+ in career sales across Austin and 18 surrounding communities. Led by Group Principal and REALTOR® Lisa Muñoz, the team delivers a luxury experience at every price point, no matter where you are in your real estate journey. Learn more at munozaustin.com.