Washington’s 7% capital gains excise tax — and the looming millionaire’s surcharge — demand proactive planning. The right strategy can legally reduce or eliminate your Washington tax exposure before the next deadline.
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Without Tax Planning
Washington's 7% excise applies to the full gain above the threshold. The proposed millionaire surcharge adds a second layer above $1M. No mitigation strategy applied. Every dollar of appreciation is fully exposed.
With Millionaire’s Tax Planning
Irrevocable trust siting, domicile planning, and installment sale structures can reduce or eliminate WA excise exposure. The gain itself doesn't change — the jurisdiction and timing do. Total potential savings: $280,000+.
| Metric | Unplanned Sale (7% WA Excise) | Planned Strategy |
|---|---|---|
| Total Capital Gain | $5,000,000 | $5,000,000 |
| WA Excise Tax (7%) | $350,000 | Reduced or $0 |
| Millionaire Surcharge | Applies | Mitigated |
| Federal LTCG Exposure | $1,190,000 | Coordinated & reduced |
| Net Tax Liability | $350,000+ (WA only) | $0–$70,000 |
Total Savings from Planning (on a $5M gain)
$280,000+
Washington’s millionaire tax is often misunderstood — but the mistakes are expensive and largely irreversible once a liquidity event closes. Four scenarios demand advisor-level attention before you rely on any planning strategy.
Washington taxes gains recognized while you are still a resident. Moving in February and closing a business sale in March does not remove WA exposure. The domicile change must be documented, established, and completed before the triggering event — not announced alongside it.
Washington's Department of Revenue can scrutinize gains recognized in the months immediately following an apparent departure. Intent, documentation, and the location of the transaction all factor in. A poorly timed exit triggers liability even after physical departure from the state.
Many high-net-worth individuals assume that moving assets into a living trust protects them from Washington's excise. It does not. Only an irrevocable non-grantor trust with an out-of-state trustee and no WA nexus can achieve situs removal. This requires advisor-designed structure, not a standard estate plan.
QSBS exclusions, home-sale exclusions, and qualified opportunity zone deferrals reduce your federal tax bill — but Washington's 7% excise runs independently. High earners who focus exclusively on federal planning often face full WA exposure on gains they believed were largely sheltered.
Not every high-net-worth Washington taxpayer qualifies for every strategy. Both the timing and the asset structure must meet specific requirements. Here is what you need to confirm before relying on any planning approach.
Planning Checklist
5 / 5 Complete
Know your gain timing and WA residency status
Identify when gains will be recognized relative to your Washington residency. Any gain recognized while you are a WA domiciliary is subject to the excise — regardless of where the assets are held or where you bank.
Assess irrevocable trust eligibility for your assets
Determine whether an irrevocable non-grantor trust with an out-of-state trustee can hold your assets prior to sale. This structure must be established well in advance — not in the weeks before a liquidity event closes.
Evaluate domicile planning requirements
Review Washington’s 183-day rule and domicile intent standards. Changing domicile requires more than physical presence in another state — it requires documented intent, severed ties to Washington, and a clear audit trail established before any triggering event.
Confirm which asset types are subject to WA excise
Washington’s excise applies to long-term capital gains from financial assets — stocks, bonds, and business interests. Real estate gains, retirement account distributions, and certain other assets are currently exempt. Verify your asset classification before assuming exposure.
Review your entity structure for pass-through exposure
LLC, S-corp, and partnership structures can inadvertently expose gains to WA excise at the individual level even when the entity itself is not a WA taxpayer. Confirm that your operating structure does not create a pass-through liability before the close of any sale.
| Planning Factor | Criteria |
| WA residency at time of gain | Must be assessed before any sale closes |
| Trust siting eligibility | Non-grantor irrevocable, trustee outside WA, no WA nexus |
| Asset type subject to excise | Long-term capital assets (not real estate or retirement accounts) |
| Minimum planning lead time | 6–12 months before liquidity event |
| Eligible strategy types | Trust siting, domicile change, installment sale, entity restructure |
If your assets and timeline check these boxes, you are in a strong position to reduce or eliminate your Washington exposure. When in doubt — verify before it’s too late.
Washington imposes a 7% excise tax on long-term capital gains above $262,000 (indexed annually). The proposed millionaire surcharge would add an additional tax layer for taxpayers with gains exceeding $1,000,000 in a single year. It affects individuals who are Washington domiciliaries at the time gains are recognized including founders, investors, and executives selling appreciated financial assets.
Yes but timing, documentation, and domicile intent are critical. Gains recognized while you are still a Washington resident remain fully taxable regardless of where you subsequently move. The domicile change must be completed and documented with evidence of intent before the triggering event occurs. Moving on the same day a sale closes is almost always too late.
No. Washington’s capital gains excise applies specifically to long-term gains from financial assets stocks, bonds, mutual funds, and business interests. Gains from real estate sales, retirement account distributions (401k, IRA), certain installment sales, and qualifying agricultural assets are currently exempt. Confirming your asset classification before planning is essential.
Yes, under the right structure. An irrevocable non-grantor trust with an out-of-state trustee and no Washington nexus can potentially remove assets from Washington tax situs meaning gains recognized inside the trust are not subject to Washington’s excise. However, this requires careful legal and tax coordination well in advance of any sale. A standard revocable living trust does not achieve this result.
At a minimum, 12 months before a liquidity event. Many of the most effective strategies trust funding, domicile changes, and installment sale structures require documented intent and time to establish. They cannot be implemented at or after closing. For founders anticipating an exit or executives receiving large equity payouts, beginning the conversation 18–24 months early provides the most planning flexibility.
Disclaimer: This is not tax advice, and it is recommended to consult a tax professional, as every tax situation is unique.
