Washington's Millionaires Tax: A Guide for High Earners

For high-net-worth individuals in Washington, the state's tax landscape has fundamentally shifted. Long considered a haven due to its lack of a state income tax, the Evergreen State introduced a significant new variable for affluent residents: a 7% tax on long-term capital gains. Enacted by the legislature in 2021 and officially taking effect on January 1, 2022, this tax has survived legal challenges and is now a critical component of financial planning for the state's wealthiest. Initially met with controversy and a court battle that reached the state's highest court, the Washington State Supreme Court ultimately upheld the tax in a landmark March 2023 decision, classifying it as a constitutional excise tax on the sale or exchange of assets, not a prohibited income tax. As a Certified Private Wealth Manager and CPA, my goal is to provide an authoritative, in-depth analysis of this tax—what it is, who it affects, and most importantly, the strategic measures you can take to manage its impact on your portfolio and long-term financial goals.

What is the Washington Capital Gains Tax?

At its core, the Washington capital gains tax, formally established under RCW 82.87, is a 7% excise tax imposed on the sale or exchange of certain long-term capital assets. The tax only applies to the portion of an individual's net long-term capital gains that exceed a substantial annual standard deduction. For the 2024 tax year, the standard deduction was $270,000, and for 2025 it is $278,000; this amount is adjusted annually for inflation by the Washington State Department of Revenue.

It's crucial to understand several key characteristics of this tax:

• Applies to Individuals: The tax is levied on individuals, not on corporations or other business entities. However, an individual can become liable for the tax if they are a beneficial owner of a pass-through entity (like an S-Corp, partnership, or LLC) that realizes a taxable long-term capital gain.
• Long-Term Gains Only: The tax specifically targets long-term capital gains, which, mirroring federal definitions, are profits from assets held for more than one year. Short-term gains, interest, and dividends are not subject to this particular state tax.
• A "Millionaire's Tax" in Practice: While not its official name, it is often called a "millionaires' tax" because the high deduction threshold ensures it primarily affects a small percentage of Washington's highest earners—estimated to be only about 0.2% of taxpayers.
• A New Tier for 2025: Beginning January 1, 2025, the tax structure becomes tiered. While the 7% rate remains for taxable gains up to $1 million, an additional 2.9% surtax applies to the portion of gains exceeding $1 million, bringing the marginal rate on those gains to 9.9%.

The revenue generated from this tax is specifically earmarked to fund education, with proceeds dedicated to the Education Legacy Trust Account and the Common School Construction Account, supporting K-12 education, childcare, and early learning programs.

Who is Subject to This Tax and How is it Calculated?

The tax primarily applies to Washington residents. An individual's domicile, or permanent place of residence, is the key factor for determining liability on the sale of intangible assets like stocks and bonds. If you are domiciled in Washington when you sell these assets, the gain is allocated to Washington and is subject to the tax. For tangible personal property (like collectibles or art), the tax applies if the property was located in Washington at the time of the sale.

The calculation itself is straightforward. It begins with your federal net long-term capital gain, then subtracts the annual standard deduction.

Formula: (Federal Net Long-Term Capital Gain Allocated to WA) - (Standard Deduction) = Taxable Washington Capital Gain

Tax Due: Taxable Washington Capital Gain x 7%

For example, if a single individual domiciled in Washington realizes $400,000 in net long-term capital gains from selling stock in 2024, the calculation would be:

• $400,000 (Net Long-Term Gain) - $270,000 (2024 Standard Deduction) = $130,000 (Taxable Gain)
• $130,000 x 7% = $9,100 (Washington Capital Gains Tax Due)

It is critical to note that the standard deduction is the same for all filing statuses—single, married filing jointly, or married filing separately. A married couple shares one single deduction, a point of divergence from many federal tax policies.

Key Exemptions: What's NOT Taxed?

Understanding the exemptions is paramount for effective wealth management in Washington. The legislature carved out several significant asset classes that are not subject to the 7% excise tax. As your advisor, I cannot stress enough the importance of structuring your portfolio and planning liquidity events around these exemptions.

The most prominent exemptions provided under RCW 82.87.050 include:

• Real Estate: The sale of all real estate, whether it's your primary residence, a vacation home, or an investment property, is completely exempt from this tax. This also extends to gains from an interest in a privately held entity that are directly attributable to real estate the entity owns directly.
• Retirement Accounts: Any assets held within a qualified retirement account are exempt. This includes 401(k)s, IRAs, Roth IRAs, and other similar tax-deferred or tax-free retirement savings plans.
• Qualified Family-Owned Small Businesses: A deduction is available for the gain from the sale of substantially all of a taxpayer's interest in a qualified family-owned small business. To qualify, the business generally must have had worldwide gross revenue of less than a certain threshold (e.g., under $10 million in the 12 months before the sale) and meet specific family ownership and participation criteria.
• Certain Agricultural and Natural Resource Assets: The law exempts specific assets common to Washington's economy, including:
  • Livestock related to farming or ranching.
  • Timber and timberlands.
  • Commercial fishing privileges.
• Depreciable Business Property: Assets used in a trade or business that are eligible for depreciation under federal tax law (specifically under Section 167 of the Internal Revenue Code) are exempt. This often includes machinery, equipment, and vehicles used for business purposes.
• Miscellaneous Exemptions: The law also provides a few other niche exemptions, such as goodwill received from the sale of a franchised auto dealership.

These exemptions form the foundational pillars of any tax planning strategy designed to mitigate the impact of Washington's new tax.

Strategic Tax Planning for High Earners in Washington

The introduction of this tax necessitates a proactive and sophisticated approach to wealth management. It is no longer sufficient to simply let investments grow; a conscious strategy for managing and timing the realization of gains is now essential. Here are several key strategies we, as Certified Private Wealth Managers and CPAs, implement for our clients.

1. Strategic Gain Realization & The Annual "Freebie"

The most fundamental strategy is to actively manage your annual capital gains to stay at or near the standard deduction threshold. Each year, every individual or married couple has a "free" pass to realize gains up to the inflation-adjusted deduction amount (e.g., $278,000 for 2025) without incurring any state tax.

Instead of holding a highly appreciated stock for decades and then liquidating it in a single year, consider a "harvest and reinvest" approach. By systematically selling appreciated assets each year up to the deduction limit and then immediately reinvesting the proceeds, you can reset the cost basis on portions of your portfolio over time, effectively neutralizing future tax liability on that growth. For large liquidity events, structuring the transaction as an installment sale can spread the gain over multiple years, allowing you to utilize the annual deduction multiple times.

2. Tax-Loss Harvesting

Tax-loss harvesting remains a powerful tool, but with a Washington-specific nuance. You can sell investments at a loss to offset any capital gains realized during the year. However, Washington's tax only applies to long-term gains and does not allow short-term losses to offset those long-term gains for the state calculation. Therefore, your focus should be on harvesting long-term losses to specifically counteract your long-term gains.

3. Asset Location Optimization

The exemption for retirement accounts is a golden opportunity for "asset location." This strategy involves placing your investments with the highest growth potential (like aggressive growth stocks) inside your tax-advantaged retirement accounts (401(k)s, IRAs). Since gains within these accounts are exempt from the Washington capital gains tax, they can grow unhindered. Conversely, assets that generate lower returns or are held for shorter terms can be kept in taxable brokerage accounts.

4. Charitable Giving Strategies

For philanthropic individuals, donating appreciated assets is an incredibly efficient strategy. When you donate appreciated stock held for more than one year directly to a qualified charity or a Donor-Advised Fund (DAF), you generally avoid recognizing the capital gain for both federal and state tax purposes. The charity receives the full market value of the asset, and you can typically take a federal income tax deduction for the donation. This is far more tax-efficient than selling the stock, paying the capital gains tax, and then donating the cash proceeds.

Furthermore, Washington law provides a specific charitable donation deduction. You can deduct up to a certain amount (e.g., $111,000 for 2025) for donations made to qualified organizations in a year where your total donations exceed the standard deduction threshold.

5. Advanced Trust and Gifting Strategies

More complex planning can involve trusts and strategic gifting. Washington state does not have a gift tax, which creates opportunities. By gifting appreciated assets to family members (such as adult children) who are in a lower tax bracket or who have not used their own annual capital gains deduction, a family can collectively shelter more gains from taxation.

Additionally, certain types of trusts can be powerful tools. For instance, transferring assets to an irrevocable non-grantor trust may shield future sales from the capital gains tax, as the trust itself is not considered an "individual" subject to the tax under current law. However, this does not apply to grantor trusts, where gains are taxed back to the individual who created the trust. These are complex strategies that require careful legal and financial counsel to execute properly.

Compliance and Reporting: How to File and Pay

Compliance with the new tax is managed through the Washington State Department of Revenue (DOR). Taxpayers who owe the tax must file a return electronically.

• Filing Portal: The return must be filed online through the "My DOR" portal, which requires setting up a Secure Access Washington (SAW) account.
• Due Dates: The Washington capital gains tax return and payment are due on the same day as your federal income tax return, typically April 15th.
• Extensions: If you file for a federal extension, you are also entitled to an extension for your Washington capital gains return. However, an extension to file is not an extension to pay. You must still pay an estimate of your tax liability by the original deadline to avoid penalties and interest.
• Required Documentation: When you file, you must include a copy of your federal tax return.

All tax payments must be made electronically via electronic funds transfer or another department-authorized method. The DOR provides detailed instructions and "how-to" videos on their website for registering an account and filing the return.

Frequently Asked Questions (FAQ)

1. Does Washington's capital gains tax apply to the sale of my primary home or rental properties? No. The sale of all real estate is explicitly exempt from the 7% Washington capital gains tax. This applies to your primary residence, vacation homes, rental properties, and raw land, regardless of where the property is located.

2. I am married. Do my spouse and I each get our own deduction? No. A married couple or registered domestic partnership shares a single standard deduction ($270,000 for 2024), regardless of whether they file their federal taxes jointly or separately.

3. Are short-term capital gains taxed under this law? No. The tax applies exclusively to long-term capital gains, which are profits from assets held for more than one year. Furthermore, you cannot use short-term capital losses to offset long-term capital gains for the purpose of this state tax calculation.

4. Is this tax constitutional? I heard it was being challenged. Yes, the tax is constitutional. After being challenged in a lower court, the Washington State Supreme Court issued a final ruling in Quinn v. State of Washington on March 24, 2023, upholding the tax. The court classified it as a legal excise tax on the transaction of selling assets, not as a property or income tax.

5. What if my long-term gains are just slightly over the annual deduction amount? The 7% tax is only applied to the portion of your gains that exceed the standard deduction. For example, if you had $271,000 in net long-term gains in 2024 (when the deduction was $270,000), you would only owe tax on $1,000 of that gain. Your tax bill would be $70 ($1,000 x 7%).