Does Washington State Have a Capital Gains Tax That Applies to Home Sales and How Does It Work

Washington state enacted a capital gains tax that took effect in 2023, and it remains in force as of September 2026. The tax applies to the sale or exchange of certain long-term capital assets, but it comes with significant exemptions that protect the vast majority of residential home sellers. Understanding the structure of the tax is the first step to knowing whether it affects your specific situation.

When the Tax Was Enacted

The Washington State Legislature passed the capital gains tax in 2021, and the Washington Supreme Court upheld it as constitutional in March 2023. The first returns were filed in 2023 covering gains realized that year. Since then, the tax has remained a topic of active conversation in the real estate community, particularly as home values across Snohomish County have climbed steadily.

What the Tax Rate Is and What It Covers

The tax is set at 7% on long-term capital gains above the annual exemption threshold. It applies to gains from the sale of stocks, bonds, business interests, and certain other assets held for more than one year. The key word for home sellers is "certain." Real estate used as a primary residence carries its own specific exemption, which we cover in the next section. For the full official breakdown, the Washington Department of Revenue's capital gains tax page is the authoritative source.

2. Does Washington's Capital Gains Tax Apply to Home Sales

For most people selling their primary home in Lynnwood, Washington's capital gains tax will not apply. The law explicitly exempts gains from the sale of real estate, and that exemption is broad enough to cover nearly every standard residential transaction. However, there are specific situations where a home sale could still generate a taxable gain, so it is worth understanding the full picture.

The Federal Primary Residence Exclusion

At the federal level, the IRS allows single filers to exclude up to $250,000 of gain from the sale of a primary residence, and married couples filing jointly can exclude up to $500,000. To qualify, you must have owned and lived in the home as your primary residence for at least two of the five years before the sale. These thresholds have not changed as of September 2026, and they remain the foundation of tax planning for most home sellers nationwide.

How Washington's Exemption Mirrors Federal Law

Washington's capital gains tax statute explicitly exempts gains from the sale of real estate. The exemption covers real property in its entirety, meaning the sale of a home, land, or other real estate does not count as a taxable capital gain under Washington's 7% tax, regardless of how large the profit is. This is a meaningful distinction from states that tax real estate gains at the state level. For a Washington homeowner selling a Lynnwood property they have lived in for years, the state capital gains tax is simply not in play.

When a Home Sale Could Trigger the Tax

The exemption covers real estate broadly, but there are edge cases worth knowing. If you sell a business that holds real estate as one of its assets, the portion of the gain attributed to the business interest rather than the property itself could be treated differently. Similarly, gains from real estate investment trusts or certain partnership interests tied to property may not fall cleanly under the real estate exemption. These are situations where a qualified tax attorney or CPA becomes essential.

3. How the Tax Is Calculated If It Does Apply

If you are selling an asset that is subject to Washington's capital gains tax, the calculation starts with your net long-term capital gain and subtracts the annual exemption amount. Only the amount above the threshold is taxed at 7%. Understanding this structure matters for sellers who may have other capital assets, even if their home sale itself is exempt.

The $262,000 Threshold in 2026

The annual exemption started at $250,000 and is adjusted for inflation each year. As of the 2026 tax year, the exemption threshold is $262,000 per individual, meaning only gains above that amount are subject to the 7% tax. A married couple does not automatically double this figure; the exemption applies per return, not per person, so joint filers still work with a single threshold. Always confirm the current year's figure with the Washington Department of Revenue or your tax advisor before filing.

What Counts as a Long-Term Capital Gain

A long-term capital gain is the profit from selling an asset you have held for more than one year. For Washington's tax, the gain is calculated the same way it is for federal purposes: sale price minus your adjusted cost basis. Assets held for one year or less generate short-term gains, which Washington's tax does not cover because the state tax is specifically limited to long-term gains.

Deductions That Reduce Your Taxable Gain

Washington allows several deductions against your capital gains before the 7% rate applies. Qualified charitable donations of long-term capital assets can reduce your taxable gain. Losses from other capital asset sales in the same year can also offset gains. For taxpayers who itemize at the federal level, certain other deductions carry over. The interaction between federal and state treatment can be complex, which is why working with a tax professional familiar with Washington law is worth the investment.

4. What Lynnwood Home Sellers Should Know Right Now

Lynnwood sits in southern Snohomish County, and its housing market has seen meaningful appreciation over the past several years. Single-family homes along corridors like 44th Avenue West and neighborhoods near Alderwood Mall have traded well above their purchase prices from the mid-2010s. That appreciation is one reason sellers are paying closer attention to tax questions, even when the state capital gains tax ultimately does not apply to their transaction.

Lynnwood Home Values and the Stakes

Median home prices in Lynnwood currently sit in the mid-to-upper $600,000 range for single-family homes, with some properties in established neighborhoods closer to Scriber Lake or the Mountlake Terrace border pushing toward $750,000 or more. A seller who bought a home in 2015 for $350,000 and sells it today for $700,000 has a gross gain of $350,000. If they are married and file jointly, the federal $500,000 exclusion covers the entire gain, and Washington's real estate exemption means no state capital gains tax either. The federal tax picture is still worth reviewing carefully, especially for single filers whose gain exceeds $250,000.

For a broader look at what buyers are paying across the region right now, the article on average home prices in Bellevue as of September 2026 provides useful context on how Snohomish County values compare to the broader Seattle metro.

Investment Properties and Second Homes

Washington's real estate exemption applies regardless of whether the property is a primary residence, a second home, a rental, or raw land. This is one of the more seller-friendly aspects of the law. An investor selling a rental duplex in Lynnwood does not owe Washington capital gains tax on the profit, even if that profit is substantial. However, they will still owe federal capital gains tax, and depreciation recapture at the federal level is a separate and significant consideration that a CPA needs to address.

Sellers should also account for closing costs and other transaction expenses when calculating their net proceeds. The article on closing costs for home buyers in Washington state in 2026 covers the buyer side of those costs, which can help sellers understand what their buyers are dealing with and how it affects negotiation.

The 'Millionaires Tax' Context

Washington's capital gains tax is sometimes called a 'millionaires tax' because of the high threshold and the types of assets it targets. In practice, it most directly affects people with large stock portfolios or business sale proceeds rather than typical home sellers. Real estate agents across Washington have noted that the tax generates a lot of client questions but rarely changes the outcome of a standard residential transaction. For a look at how agents in the state are responding to client concerns about this law, HousingWire's reporting on what Washington agents are seeing offers useful perspective.

5. Steps to Take Before You Sell

Even when the Washington capital gains tax does not apply to your home sale, there are concrete steps worth taking before you list your property. Getting organized early reduces stress and helps you make informed decisions about timing, pricing, and how to handle your proceeds.

Track Your Cost Basis

Your cost basis is not just the price you paid for the home. It also includes closing costs you paid when you bought, capital improvements you made over the years, and certain other qualifying expenses. A new roof, a kitchen remodel, a garage addition: these all increase your basis and reduce your taxable gain at the federal level. Keep receipts and permits for any significant work done on your Lynnwood property, because they are worth real money at tax time.

Property taxes are a related cost that sellers and buyers both think about. If you want to understand how annual property taxes are calculated on higher-value homes in this region, the breakdown on property taxes on an $800,000 home in King County gives a clear picture of how the math works, and the same methodology applies in Snohomish County.

Consult a Tax Professional

A CPA or tax attorney who practices in Washington state is the right person to advise you on your specific situation. Real estate agents can explain how the tax works in general terms and flag the questions you should be asking, but the specific calculation of your gain, your eligibility for exclusions, and any depreciation recapture on a rental property require a licensed tax professional. This is especially true if you have owned the property for many years, made significant improvements, or used part of the home for business purposes.

Work with a Local Real Estate Expert

Knowing your likely net proceeds before you list is one of the most useful things a local agent can help you figure out. An agent who knows Lynnwood's market can give you a realistic estimate of what your home will sell for, walk you through typical seller-side closing costs, and help you understand what you will actually walk away with. That number, combined with guidance from your tax advisor, gives you a complete picture before you make any decisions.

Lynnwood's inventory of craftsman bungalows near Scriber Lake Park, mid-century ranches along 196th Street SW, and newer townhomes near the Lynnwood Transit Center all attract different buyer profiles and price differently. Local market knowledge translates directly into better pricing strategy, which in turn affects the size of your gain and your overall financial outcome.