TL;DR — Domicile changes are proven with paper, not intentions. Washington presumes your old domicile continues until you prove otherwise, so this checklist gives you the record to build: before the move, move week, the first 90 days, and every year after — with what to save at each step. It's written for founders, executives, and investors exiting before Washington's 9.9% income tax (ESSB 6346) hits January 1, 2028, and it applies equally to the capital gains tax already in effect.
For the strategy behind these steps — why domicile matters, what auditors examine, how timing interacts with a liquidity event — see the Domicile Strategy Guide and the Washington Founder Exit Map. This post is the execution layer.
Why a checklist, and why documentation is the whole game
Domicile has two elements: physical presence in the new state, and intent to remain there indefinitely. Presence is countable; intent must be inferred from conduct, records, and contemporaneous statements. Under the common-law rule every state applies, a domicile continues until a new one is acquired — and the burden of proving the change falls on you. No minimum number of days is required to establish the new domicile — the day-count thresholds belong to Washington, not your destination state.
That's why this post exists. In an audit, the question isn't "did you move?" — it's "show me." Contemporaneous records (a dated moving invoice, a license issued in February, a lease signed in January) beat anything reconstructed two years later. Every item below ends the same way: do the thing, and keep the proof.
- The capital gains tax applies now. Washington taxes long-term gains on stock and intangibles at 7% above the inflation-adjusted standard deduction ($278,000 for 2025), and 9.9% above $1 million in gain — based on where you are domiciled on the day the sale closes (RCW 82.87.100(1)(b)). Not residency, not a day count. Domicile. Sell while still domiciled here, and the checklist came too late.
- The income tax arrives January 1, 2028. ESSB 6346 applies a 9.9% tax to household income above a $1 million standard deduction. A repeal initiative was certified for the November 3, 2026 ballot on July 15, 2026 (Initiative 645) and a constitutional challenge is pending, but the only defensible posture is to plan as though it arrives on schedule.
One more rule before you start: conduct first, announcement last. A public declaration of your move cuts both ways — it corroborates a record that already exists, and impeaches one that doesn't. The Derek Jeter and Tom Golisano cases show both edges of that blade.
Phase 1 — Before the move (ideally 6–12+ months before any liquidity event)
A domicile change needs runway — six to twelve months of documented life in the new state before any triggering transaction is the minimum defensible posture; more is better.
- Pick the state and commit to it. Nevada, Florida, and Texas are the usual candidates, but the analysis isn't only tax — community property, creditor protection, homestead rules, and estate planning all change at the border. Get counsel involved now, not after.
- Map the timeline against your recognition events. If a sale, tender offer, or exit is on the horizon, the move work starts first — sequence matters more than anything else here. Save: a dated planning memo or engagement letter.
- Acquire the new home. Buy or sign a long-term lease, and make it credible relative to what you keep — a studio in Las Vegas against a waterfront home on Mercer Island tells the auditor which one is home. Retain: closing statement or lease, utility setup confirmations.
- Decide what happens to the Washington home. Selling is the cleanest abandonment evidence; a genuine long-term lease to an unrelated tenant works too. Keeping it vacant "just in case" is the classic red flag. Save: listing agreement, closing statement, or lease.
- Inventory the "near and dear." Auditors ask where your most cherished possessions live — art, heirlooms, photos, safe deposit contents. List them now and plan to move them; domicile follows what you'd never leave behind.
- Do not announce anything yet. No LinkedIn post, no farewell email, no trade press quote. The announcement comes after the facts exist, if at all.
Phase 2 — Move week
- Physically relocate — and paper the date. The mover's invoice and bill of lading are among the best documents in the file: a third-party, dated, itemized record of your goods leaving Washington. If you move yourself, keep rental agreements, fuel receipts, and dated photos. Retain: all of it, permanently.
- Move the near-and-dear items with you. Not into a Seattle storage unit. Close or relocate any Washington safe deposit box. Save: bank records showing the closure, mover's inventory.
- File the USPS change of address to the new home — permanent, not temporary. Retain: the confirmation.
- Start the day-count log on day one. A contemporaneous record of where you sleep each night, kept from the move date forward. Credit card records, phone location, and travel receipts should tell the same story, because the auditor will pull them.
Phase 3 — First 30–90 days in the new state
This phase is mostly unglamorous paperwork — none of it decisive alone, but together it's the file.
- Driver's license: get the new state's license and surrender Washington's — most states require this within 30–90 days anyway. Save: copy showing issue date.
- Vehicles: retitle and register cars, boats, and planes in the new state. Retain: registrations.
- Voter registration: register in the new state and affirmatively cancel your Washington registration — the cancellation is the abandonment evidence. Then vote there. Save: registration card, cancellation confirmation.
- Declaration of domicile / homestead filings, where available: Florida allows a sworn declaration filed with the circuit court clerk (Fla. Stat. §222.17) plus a homestead exemption; Nevada allows a sworn declaration with the district court clerk (NRS 41.191); Texas offers a residence homestead exemption through the county appraisal district. These aren't sufficient alone — they're sworn intent evidence that must match your conduct. Retain: file-stamped copies.
- Update your estate plan. Have wills, trusts, and powers of attorney reviewed under the new state's law and re-executed reciting your new domicile — this also surfaces community-property transition issues worth solving deliberately. Washington's estate tax applies to decedents domiciled here, so this step does estate-tax work too.
- Financial accounts: update the address of record on every bank, brokerage, retirement, and credit card account; establish a local bank relationship; update where your K-1s, 1099s, and W-2s are issued. Save: statements showing the new address.
- Federal tax filings: file your next federal return from the new address (and Form 8822 if you want the change on record sooner).
- Insurance: rewrite auto, homeowners, and umbrella policies to the new state, with the new home as "primary residence." Retain: declarations pages.
- Professional and daily life: new doctors, dentist, vet, accountant, and — where practical — attorney in the new state. Transfer prescriptions. Join a local gym, club, or house of worship. These are exactly the "life" facts auditors weigh.
- Memberships and boards: resign Washington club memberships or convert them to nonresident status; be thoughtful about Washington board seats and business registrations that anchor you here.
- Family: if you have school-age children, enroll them in the new state. Where your spouse and kids actually live is among the heaviest facts in the analysis — a spouse who stays in the Seattle house will usually sink the claim.
Phase 4 — Ongoing (every year until the statute of limitations closes)
- Maintain the day-count log and actually limit Washington days. There's no magic number for domicile, but substantial time back in Washington undermines intent — and if you're also relying on nonresident status, the safe harbor requires no Washington abode all year, a home maintained elsewhere all year, and 30 or fewer Washington days (RCW 82.87.020(11)(a); ESSB 6346 §101(8)).
- Understand what the 30-day rule does and does not do. Nonresident status protects tangible-property gains and matters under the income tax, but the capital gains tax on stock follows domicile on the day of sale regardless of residency. Passing the day count doesn't change your domicile — That trap has its own post.
- Keep the story consistent. Loan applications, insurance forms, club paperwork, and social media should all say the same thing about where home is — inconsistent statements are the cheapest ammunition an auditor gets.
- Now you can say it out loud. Once the conduct is real and documented, a public statement corroborates the record instead of manufacturing evidence against you.
- Retain the file. Keep everything above, organized by date, through the limitations period for every open year — plan on a minimum of four years after each relevant return, longer if a large recognition event is involved.
Where these plans usually fail
Most failures trace back to sequencing: announcing the move before the facts exist, or leaving the Washington house empty "just in case." Splitting the household — a spouse or kids who stay behind — is hardest to overcome; it undercuts intent more than any document can fix. And moving in the weeks before a deal closes looks like exactly what it is. There's no substitute for runway.
How we can help
A domicile change is won in the details and defended with the file. If you're planning a Washington exit — especially with a liquidity event on the horizon — the highest-value hour you can spend is having counsel pressure-test the sequence and the record before the gain is on the table.
Book a 20-minute planning call →
This post is for educational purposes only and is not legal or tax advice. Domicile determinations are intensely fact-specific — consult a tax attorney about your situation. No attorney-client relationship is created by reading this post or by contacting the firm. Please do not send any confidential or time-sensitive information until an attorney-client relationship has been established in writing. This post reflects the law as of its publication date and may not reflect subsequent changes; statutes, regulations, and effective dates discussed here (including ESSB 6346) may change. This material may be considered attorney advertising under applicable rules.
