Texas Capital Gains Tax, Explained

Most states tax capital gains because they tax income, and a gain is just another kind of income. Texas never built that machine. There is no individual income tax, which means there is no return where a gain could land, no state holding-period rules, no state brackets — nothing. A day-trader's short-term churn and a founder's once-in-a-lifetime exit get identical Texas treatment: none.

And unlike states where "no income tax" is one bad budget year from changing, Texas voters wrote it into the constitution. Proposition 4, passed in 2019, prohibits the state from imposing an individual income tax. Undoing that requires another constitutional amendment approved by voters — a far taller order than a legislative vote. For anyone planning a multi-year exit or a retirement heavy in appreciated assets, that permanence is itself worth something.

Zero state tax doesn't mean zero tax. The federal government taxes your gain the same in Houston as in Manhattan — the federal capital gains brackets just become the whole bill instead of the first layer. Three federal pieces matter:

Worked example. A married couple in Austin earns $150,000 in W-2 income and sells long-held index funds for a $300,000 gain. Texas collects $0. Federally, the gain sits in the 15% bracket: $45,000. Their MAGI is $450,000, so the $200,000 of income above the $250,000 NIIT threshold picks up the 3.8% surtax: $7,600. Total bill: $52,600 — about 17.5% all-in, and every dollar of it federal. The same sale in a high-tax coastal state could add five figures of state tax on top.

One thing zero state tax doesn't eliminate: the payment-timing problem. A six-figure gain usually means a quarterly estimated tax payment to the IRS in the quarter of the sale — Texans skip the state voucher, not the federal one.

The classic play: establish Texas residency, then sell. It genuinely works — for the right assets, on the right timeline. But the tax you escape is governed by your origin state's rules, not by anything Texas does. Texas will never tax your gain; the only question is whether the state you left still can.

• Stock and most intangibles are generally sourced to where you live on the sale date. Sell after a genuine move and the old state usually has no claim.
• Real estate never moves. California-source real estate stays California-taxable forever — becoming a Texan changes nothing about a Sacramento-taxed building.
• Installment notes carry their origin. Payments from a sale made while you were a resident of the old state generally keep that state's character, year after year, no matter where the checks are mailed.

Two asterisks on the zero. First, the franchise tax — Texas's "margin" tax on business entities. It applies to taxable entities (LLCs taxed as partnerships or corporations, among others) whose annual revenue exceeds the no-tax-due threshold — roughly $2.47 million under the 2024–25 figures. It is not a personal capital gains tax and most individual investors never touch it. But if you sell appreciated business assets inside an entity, the proceeds can push entity revenue over the line — an entity-level cost worth modeling before a big internal asset sale, and one reason deal structure (asset sale vs. equity sale) matters even in a no-income-tax state.

Second, the property-tax trade-off. Texas funds itself somewhere, and that somewhere is largely real property: Texas property taxes rank among the highest in the country. For a stock-heavy household the trade is a clear win. For someone rolling a large gain into expensive Texas real estate, the annual property-tax bill quietly claws back part of the income-tax savings — worth running over a ten-year horizon, not just at closing. Deciding between keeping a property and selling it? Our sell-or-rent analysis walks through that math.

In California, planning energy goes into escaping the state layer. In Texas there is no state layer — so every planning dollar concentrates on the federal side, where the levers are bigger than most sellers realize:

• Bracket timing. The federal 0% long-term rate is real money for a retiree or a founder in a gap year. Realizing gains in deliberately low-income years — instead of stacking everything into one — can move six figures of gain into the 0% and 15% bands.
• Gain and loss harvesting. With no state friction, harvesting decisions are purely federal: realize losses against gains, or harvest gains in cheap years to reset basis.
• Watching the NIIT line. The 3.8% surtax switches on at $200K/$250K MAGI — a sale split across two years can keep part of the gain under the threshold.
• 1031 exchanges on rentals. No state tax to defer, but the federal deferral via a 1031 exchange works exactly the same in Texas — and with no FTB-style tracking leash when you exchange across state lines.
• Recapture math before you list. Every year of depreciation on a rental comes back at up to 25% federally. Run the depreciation calculator before you price a sale, so the recapture layer isn't a surprise at filing.