MELANIA SANDRA · Luxury Real Estate · Henderson, Nevada · 2026
Escaping the 2026 Washington Capital Gains & "Millionaire" Taxes
Washington has fundamentally changed its tax landscape. The 7%/9.9% capital gains tax is live, and the 9.9% Millionaire's Tax is signed into law for 2028. Here's what it means, who it hits, and how to legally protect your wealth before the window closes.
CONTENTS
01 Washington Broke a 90-Year Promise
02 The Washington Tax Stack for High Earners
03 How Washington's Tax Landscape Evolved
04 Key Exemptions From the Capital Gains Tax
05 The Profiles Most Exposed to Washington's New Tax Regime
06 Your 7-Step Escape Strategy
07 Planning Strategies for Washington Residents
08 The Millionaire's Tax Faces Immediate Challenges
09 Frequently Asked Questions
01 Washington Broke a 90-Year Promise
For nearly a century, Washington state's "no income tax" status was one of its most celebrated features — a constitutional cornerstone that made the Evergreen State a magnet for high earners, tech founders, and investors who wanted to keep more of what they built.
That era is over. In 2021, Washington enacted a capital gains tax — initially challenged in court and ultimately upheld by the Washington Supreme Court in Quinn v. State (2023) as an "excise tax." In 2025, the Legislature raised the capital gains rate to a tiered structure: 7% on gains from $270,000 to $1 million, and 9.9% on gains above $1 million — one of the highest capital gains rates in the nation.
Then, on March 30, 2026, Governor Bob Ferguson signed SB 6346 into law: Washington's first broad personal income tax in nearly a century. The "Millionaire's Tax" imposes a 9.9% rate on household income exceeding $1 million, effective January 1, 2028. It is projected to raise $3 billion or more annually from approximately 21,000 households — less than 0.5% of Washington's population.
For those households, the calculus has fundamentally changed. And for high earners, founders, and investors with upcoming liquidity events, the planning window — while still open — is closing.
02 The Washington Tax Stack for High Earners
Washington's tax burden for high-income individuals is now a layered system. Understanding the full stack — capital gains, the new Millionaire's Tax, estate tax, B&O, and sales tax — is essential before making any planning decisions.
A Washington-based founder sells their company for a $5 million long-term capital gain in 2025. Federal long-term capital gains tax at 23.8%: ~$1,190,000. Washington capital gains: 7% on $730,000 = $51,100 + 9.9% on $4,000,000 = $396,000. Total WA capital gains: $447,100. Combined federal + state burden: over $1.63 million — more than 32% of the total gain — before any estate planning considerations.
The "WA Tax Stack" in Action: A Hypothetical Founder Exit
A Washington-based founder sells their company for a $5 million long-term capital gain in 2025. Federal long-term capital gains tax at 23.8%: ~$1,190,000. Washington capital gains: 7% on $730,000 = $51,100 + 9.9% on $4,000,000 = $396,000. Total WA capital gains: $447,100. Combined federal + state burden: over $1.63 million — more than 32% of the total gain — before any estate planning considerations.
03 How Washington's Tax Landscape Evolved
Washington didn't change overnight. Understanding the sequence of legislative events helps clarify what's in effect now, what's coming in 2028, and what remains legally uncertain.
04 Key Exemptions From the Capital Gains Tax
Not all gains are subject to Washington's capital gains tax. Several significant exemptions exist that can provide relief, particularly for real estate, retirement assets, and certain business owners. Understanding these is the first line of planning defense.
When an asset is inherited, its cost basis is stepped up to fair market value at the date of the decedent's death. This eliminates all accrued capital gain for both federal and Washington state purposes — no capital gains tax owed on the appreciation, by either the estate or the heir. For highly appreciated assets held long-term, incorporating a step-up-in-basis strategy into estate planning can eliminate significant Washington capital gains tax liability.
Step-Up in Basis at Death: The Often-Overlooked Escape Valve
When an asset is inherited, its cost basis is stepped up to fair market value at the date of the decedent's death. This eliminates all accrued capital gain for both federal and Washington state purposes — no capital gains tax owed on the appreciation, by either the estate or the heir. For highly appreciated assets held long-term, incorporating a step-up-in-basis strategy into estate planning can eliminate significant Washington capital gains tax liability.
05 The Profiles Most Exposed to Washington's New Tax Regime
The Millionaire's Tax is projected to affect fewer than 21,000 Washington households — less than 0.5% of the state's population. But within that group, the impact is substantial. For those with upcoming liquidity events, large investment portfolios, or business exits, the combined Washington tax burden now rivals California and New York in its impact on high earners.
Tech founders and executives with RSUs, stock options, or equity stakes in upcoming public offerings or M&A exits face some of the most significant exposure. Washington is home to Amazon, Microsoft, Expedia, and a dense startup ecosystem — and many of their highest earners are now in the crosshairs.
Business owners planning exits must now weigh the capital gains tax stack carefully — especially those with appreciated assets not qualifying for the family business exemption. The interaction between the capital gains tax (7%/9.9%) and the new Millionaire's Tax (also 9.9%) can, in some cases, effectively eliminate the benefit of the lower capital gains rate.
High-income professionals — physicians, attorneys, engineers, and executives earning over $1 million annually — face the Millionaire's Tax directly on their compensation once the 2028 effective date arrives. For those with location flexibility, the next 20 months represent a critical planning window.
Oregon Is Not a Safe Haven
Many Seattle-area residents consider Vancouver, WA / Portland, OR, as their local alternative. But Oregon taxes capital gains as ordinary income at up to 9.9%, has its own estate tax with a top rate of 16%, and has a lower exemption than Washington. Relocating from Washington to Oregon for tax purposes is not a solution — it is a lateral move at best, and in some cases a step backward. The meaningful tax relief for Washington high earners lies in Nevada, Texas, Florida, Wyoming, and other states with no income tax.
06 Your 7-Step Escape Strategy
For those who have decided the Washington tax environment is no longer compatible with their financial goals, the path to a legally clean exit requires proactive planning, thorough documentation, and professional guidance. Here's the framework.
07 Planning Strategies for Washington Residents
Not everyone can or will relocate. For those committed to remaining in Washington, several planning strategies can reduce — though not eliminate — exposure to the capital gains and Millionaire's Tax regimes.
08 The Millionaire's Tax Faces Immediate Challenges
SB 6346 is a signed law — but it is not necessarily permanent. Washington's constitutional history with income taxes makes this legislation highly vulnerable to legal challenge, and a ballot initiative campaign is also being organized.
Washington's state constitution has historically been interpreted to treat income as "property," subject to uniformity requirements that prohibit graduated tax rates. This interpretation was the basis of repeated failed attempts to enact a state income tax over the past 90 years.
To survive a constitutional challenge, the Legislature structured SB 6346 as an excise tax on the "receipt of income" — following the same legal theory that the Washington Supreme Court accepted in Quinn v. State (2023) when it upheld the capital gains tax. However, SB 6346 is a direct tax on income — not on the act of selling a specific asset class — which critics argue is meaningfully different from the capital gains tax's narrower framing.
The Citizen Action Defense Fund, led by former Attorney General Rob McKenna, has stated it is "prepared to take prompt legal action" following the bill's signing. Legal scholars are divided on whether the Quinn precedent extends to a broad income tax. The outcome of this litigation could determine whether the Millionaire's Tax ever takes effect.
Planning Caution: Don't Bet on the Courts
While a legal challenge to the Millionaire's Tax is likely and its outcome is uncertain, prudent planning requires assuming the tax will survive and take effect as written on January 1, 2028. Court timelines are unpredictable. Washington's Supreme Court has shown a willingness to uphold novel tax structures framed as excise taxes. Plan as if the tax will be enforced — and if it is struck down, your conservative planning will have cost you nothing.
The Planning Window: 20 Months and Counting
From April 2026, there are approximately 20 months until the Millionaire's Tax effective date of January 1, 2028. For those considering relocation, this window is sufficient — but genuine domicile changes require time to execute and document properly. The window is open. It will not be open indefinitely.
09 Frequently Asked Questions
This guide is for educational and informational purposes only and does not constitute tax, legal, financial, or investment advice. Washington's tax landscape is evolving rapidly — SB 6346 is subject to legal challenge, and its ultimate legal status is uncertain as of publication. Information reflects publicly available data as of April 2026. Individual tax circumstances vary significantly by income source, asset type, residency status, and other factors. Always consult a licensed CPA, tax attorney, and financial advisor before making any relocation, tax planning, or financial decisions. No attorney-client relationship is created by reading this content.
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