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Recent Updates Regarding Washington State Taxes

Washington Capital Gains Tax

Beginning January 1, 2022, a flat 7% tax on net long-term capital gains went into effect. Many advisors believed the tax to be unconstitutional and that it would be repealed if/when challenged. However, the WA Supreme Court upheld the tax in March of 2023 in Quinn v. Washington. Additionally, the public had a chance to repeal the tax in November of 2024, but approximately 63% of the voters opposed repealing the tax. Regardless of the questionable legality and polarizing nature of this tax, it is here to stay.

On May 20, 2025, Senate Bill 5813 was signed into law, creating a new tier to the capital gains tax, adding 2.9%, for a total of 9.9%, for gain exceeding $1m. The change is retroactive to January 1, 2025.

Summary of the Washington Capital Gains Tax

A full explanation of the Washington Capital Gains Tax is beyond the scope of this update; however, several key items are highlighted here:

The tax is relatively new, and there remain several complexities and uncertainties beyond the scope of this article. These include, but are not limited to:

Planning Opportunities

The recent update has not materially changed the existing tax, so the same planning strategies remain. What the increase has done is further clarified the direction and plans of Washington State’s legislature as it relates to tax policy. Along with recent increases in Washington’s Estate Tax, the state has broadened sales taxes and expanded interpretations of B&O Tax. It appears likely the state will continue to create and increase taxes on individuals and businesses residing and doing business in Washington.

There are several strategies for avoiding Washington capital gains tax, including:

Washington Capital Gains Tax currently has a maximum rate of 9.9%, and although this is only one aspect of any planning, and although it is unlikely that this tax would be the defining factor in decision making, nearly 10% tax is likely not immaterial. With the state of Washington creating higher taxes across the board, this is a good time to consider both your short-term and long-term planning.

Washington Estate Tax

Recent Update

In addition to an increased capital gains tax, there were two, potentially more impactful, changes to the Washington Estate Tax, impacting estates of decedents dying on or after July 1, 2025:

To demonstrate how meaningful these changes are, consider the following examples:

Similar to the changes for the Washington capital gains tax, the changes in estate tax do not fundamentally change how the tax works but rather increase the negative outcomes. The same strategies advisors have been using to avoid the estate tax are all still viable, simply more effective now. Common strategies include shifting growth assets out of large estates, domicile planning, employing multi-generational GST-exempt trusts, charitable giving, and so on. With these radical rate increases, it’s the perfect time to have conversations with your advisors.

One planning item that is often overlooked is entity structuring related to real property. Washington estate tax excludes real property outside of Washington, but intangible assets are sourced to the state of domicile. This creates a valuable planning opportunity to categorize assets as intangible or tangible based on the location of the asset and the domicile of the taxpayer. For example, if you are a Washington domiciliary and you directly own a house (i.e. not through an LLC or corporation), or other tangible property, outside of Washington, upon death, Washington will exclude this asset from estate tax because tangible assets located elsewhere are not subject to WA estate tax.1 However, if a Washington domiciliary owns units of an LLC, which owns that house, the value of those LLC units is included in that decedent’s estate tax because LLC units are considered an intangible asset.

To plan for this situation, a Washington domiciliary can own real property located outside the state either directly or in a revocable trust. Conversely, if a non-WA domiciliary owns real property in Washington, that property can be owned in an LLC to ensure that the property is sourced to the non-WA decedent’s state of domicile. This planning should consider non-tax issues, such as any liability concerns, as well.


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