Washington State has no personal income tax — but enacted a 7% capital gains tax in 2023 on long-term gains above $262,000 (single or married, no doubling for joint filers). This applies to gains on stocks, bonds, business interests, and most investment assets. Real estate, retirement accounts, and certain other assets are exempt. Washington's high sales tax (6.5% + local) and the capital gains tax are the primary tax drivers for departure, particularly for high-net-worth residents with large investment portfolios.
At a glance
Key Facts
State Income Tax
No Washington State personal income tax on wages, salary, or ordinary income
Capital Gains Tax
7% on long-term capital gains above $262,000 (2024 threshold, indexed to inflation); upheld by WA Supreme Court in 2023
Capital Gains Exemptions
Real estate sales exempt; retirement accounts (IRA, 401k, pension) exempt; certain agricultural land exempt; business sales may qualify for exemption
Sales Tax
6.5% state rate; local additions up to 3.6%; combined rates 7.5–10.4%; no grocery exemption (groceries exempt under state law but depends on classification)
B&O Tax
Washington Business & Occupation tax on gross receipts (0.1–1.5%+ depending on business type) — applies regardless of profitability
Estate Tax
Washington State estate tax above $2.193M (2024); 10–20% rates — one of the higher top rates nationally
Introduction
Washington State occupies a unique position in US tax planning: it has no personal income tax (and a state constitution that makes it very difficult to enact one), but it introduced a 7% capital gains excise tax in 2023 that survived a state Supreme Court challenge. For most Washington residents — workers earning wages and salaries — Washington remains a low-tax state. For investors, entrepreneurs, and business owners with significant capital gains, the 7% tax on gains above $262,000 is a meaningful consideration.
This guide covers Washington State residency, the capital gains tax in detail, B&O business tax, and what departure from Washington looks like.
Section 01
Washington State Residency and Departure
Washington State uses a domicile-based residency test with no statutory day-count rule. Leaving Washington is conceptually straightforward, but Washington Revenue audits departing high earners — particularly in years with large capital gains or business sales.
Washington Residency: Domicile Test
You are a Washington State resident for tax purposes if Washington is your domicile — your fixed, permanent home with intent to return. Washington has no income tax, so residency status primarily matters for: (1) the capital gains excise tax (7%); (2) the estate tax; (3) the B&O tax for business owners. To change domicile from Washington: (1) Establish a genuine new home in the destination state; (2) Get a new driver's licence and vehicle registration; (3) Register to vote in the new state; (4) Update bank accounts, professional licences, and insurance to the new address.
No Statutory Residency Trap
Washington does not have a statutory residency rule capturing you as a resident based on 183+ days + maintained dwelling (unlike New York and Massachusetts). If you change domicile to Nevada or Oregon, you are not a Washington resident. However, if you maintain a Washington home and spend most of your time there, the domicile change will be scrutinized.
Washington Capital Gains Tax and Departure
The capital gains tax is the most important departure driver for high-net-worth Washington residents. Key point: Washington's capital gains tax applies to Washington residents on their gains from stock, bonds, business interests, and investment assets — regardless of where those assets are located. If you sell $2M in Microsoft shares (a common Washington scenario), you owe 7% on $2M minus $262,000 = $121,240 in Washington capital gains tax. Departing Washington before a major realization event eliminates this liability — provided you have genuinely changed domicile before the gain is realized.
Departure Year Considerations
Washington has no income tax and no personal income tax return. For the capital gains tax: you owe Washington capital gains tax on gains realized while you were a Washington resident. Gains realized after departure are not subject to Washington capital gains tax. Critical: the date of sale or realization determines whether the gain is subject to WA capital gains tax — not when you receive the proceeds. If you sell on March 15 and departed Washington in January, and your departure was genuine, the gain is not subject to Washington capital gains tax.
Section 02
Washington's 7% Capital Gains Tax: Scope, Exemptions, and Compliance
Washington's capital gains excise tax (enacted 2021, upheld by Washington Supreme Court March 2023) is the defining tax issue for departing high-net-worth Washington residents.
What Is Taxed
The 7% tax applies to long-term capital gains (assets held 12+ months) above the annual standard deduction ($262,000 in 2024, indexed annually). Taxable assets include: publicly traded stocks and bonds, mutual fund gains, business interests and partnership interests, cryptocurrency gains, and other investment property.
Key Exemptions
Real estate: Gains from real estate sales are fully exempt from the capital gains tax (though Washington has a separate real estate excise tax on the seller)
Retirement accounts: Gains within IRAs, 401(k)s, 403(b)s, pensions, and similar qualified retirement accounts are exempt
Qualified family-owned small business: Sales of qualifying Washington small businesses may be exempt
Timber: Timber gains are exempt (separate timber tax applies)
Agricultural land: Sales of agricultural land meeting certain criteria may be exempt
The Standard Deduction
The $262,000 annual standard deduction means the first $262,000 of long-term capital gains per year is exempt. This is per return (not doubled for married couples — this is unusual). For most investors with annual gains below $262,000, the tax does not apply. For investors with a large exit event (business sale, concentrated stock position), the 7% tax is significant.
Washington Estate Tax: $2.193M Threshold
Washington State's estate tax applies to estates above $2.193 million (2024) — one of the lower thresholds nationally. Washington's top estate tax rate is 20% — the highest state estate tax rate in the US. For Washington homeowners (median Seattle home ~$800,000) with retirement savings and investment accounts, the $2.193M threshold is not difficult to exceed. Changing domicile to Nevada, Florida, or Texas eliminates Washington estate tax exposure for future estates.
Leaving Washington State involves capital gains tax planning, domicile documentation, and potentially estate tax considerations. Get matched with a CPA who handles WA departure and capital gains planning.
⚠ Not for simple single-state returns. Free filing is fine for straightforward W-2 situations.
How do I avoid Washington State capital gains tax?
The most reliable approach is to change your Washington State domicile before realizing large capital gains. Establish genuine residency in a state with no capital gains tax (Nevada, Florida, Texas, Wyoming, etc.) — get a new driver's licence, voter registration, and establish a genuine primary home. Realize the gains after your departure date. The capital gains tax applies to gains realized while you are a Washington resident, so departure before realization eliminates liability. Note: the exemptions (real estate, retirement accounts) also apply — if your gains are from home sales or retirement account growth, those are exempt regardless of residency.
Q
Does Washington State have a 183-day rule?
No — Washington State does not have a statutory 183-day + maintained dwelling residency rule like New York or Massachusetts. Washington uses a domicile-based test. If you establish genuine domicile in another state, you are not a Washington resident even if you maintain a Washington vacation home and visit frequently. However, for the capital gains tax and estate tax, Washington will scrutinize the facts of your departure — particularly in years with large gains.
Q
What is Washington's B&O tax and does it apply after moving?
Washington's Business & Occupation (B&O) tax is a gross receipts tax on businesses operating in Washington — applied to revenue regardless of profitability, at rates from 0.1% to 1.5%+ depending on business type. After moving out of Washington, B&O tax continues to apply to Washington-source business activity (sales to Washington customers, services performed in Washington, goods shipped from Washington). If you run a business primarily serving Washington customers or operating in Washington, the B&O tax may continue even after changing your personal domicile.
Q
How does Washington's tax burden compare to Oregon?
Washington and Oregon have opposite tax structures: Washington has no income tax but has sales tax (7.5–10.4%), capital gains tax (7%), and B&O business tax. Oregon has a high income tax (up to 9.9%) but no sales tax and no capital gains tax (gains are taxed as ordinary income). For wage earners: Washington is generally better (no income tax). For investors with capital gains: Washington can be worse if gains exceed $262,000 (7% WA vs Oregon's income tax rate on gains). For retirees on fixed income: Washington is usually better. Many Portland-area residents live in Washington (Camas, Vancouver) and work in Oregon — paying WA property taxes and sales taxes but avoiding WA income tax and OR income tax simultaneously (though you owe OR income tax for OR workdays).
Disclaimer:This guide provides general tax information for educational purposes only. Washington State's capital gains excise tax, estate tax, and residency rules are subject to change. This is not tax or legal advice. Consult a qualified CPA or attorney before making residency decisions or planning around a capital gains event.