Estate planning often sits quietly on a to-do list. Not because it isn’t important, but because it can feel distant, technical, or easy to postpone.
Washington’s estate tax changes in 2025 and 2026 are a reminder that timing and structure matter, even when you’re not thinking about “estate tax planning” day to day. Senate Bill 6347, signed March 24, 2026, restores Washington’s prior estate tax rate structure for deaths on or after July 1, 2026, rolling back the higher rates that took effect last summer.
If you live in Washington, own Washington real estate, or have a business or family wealth that could cross the state threshold, this update is worth a closer look — not to react, but to make sure your plan still reflects the life you’re building and the people you want to protect.
The shift, in plain English
SB 6347 does two headline things:
- It lowers Washington estate tax rates beginning July 1, 2026.
The top marginal rate returns to 20% for deaths on or after July 1, 2026, reversing the 35% top rate that applies for deaths between July 1, 2025, and June 30, 2026. - It resets the Washington estate tax exemption (exclusion amount).
For deaths Jan. 1 through June 30, 2026, Washington’s exclusion amount is $3,076,000.
For deaths on or after July 1, 2026, it resets to $3,000,000.
One nuance: The session law’s overall effective date is June 11, 2026, but the practical impact most families care about is still driven by the date of death, with the major change occurring July 1, 2026.
Why this matters even if you’re not “ultra-wealthy”
Washington’s estate tax threshold is far lower than federal levels, and the tax can apply to estates that may never face federal estate tax at all. That’s why Washington estate planning can feel surprising: a home, retirement accounts, and a business interest can add up faster than many families expect.
And because 2026 effectively has two different rule sets, families who are already administering an estate — or who have older documents with formula provisions — may see real planning consequences from what looks like a simple rate rollback.
A quick refresher: Washington estate tax vs. inheritance tax
Washington imposes an estate tax, not an inheritance tax. That means the tax is assessed at the estate level before assets are distributed, and a person receiving an inheritance generally does not owe a separate Washington inheritance tax. Washington can also require filing for certain nonresidents who own real estate or tangible personal property in Washington, even if most wealth is held elsewhere.
What changes for families at different levels of wealth
If your estate is under about $3 million: You may not owe Washington estate tax under either structure, assuming you’re not pushed above the threshold by valuation changes or assets that are often missed in informal estimates. The filing threshold/exclusion amount is the key line to watch.
If your estate is moderately above the threshold: Here’s where the story gets subtle: the post–July 1, 2026, rules lower rates, but they also lower the exclusion amount from $3,076,000 to $3,000,000. That means some estates near the threshold may see little change — and in a narrow band, the result may not move in the direction you expect.
If your estate is well above $9 million: This is where SB 6347 is most meaningful. The top marginal rate drops from 35% to 20% for deaths on or after July 1, 2026, which can materially reduce Washington estate tax exposure for larger taxable estates.
For business owners and families with illiquid assets, the practical impact often comes down to liquidity. Without thoughtful planning, heirs may need to sell assets quickly to cover taxes and administrative costs. Lower rates can ease that pressure, but planning still matters.
The planning questions this change should trigger (in a good way)
Estate planning isn’t only about what happens “later.” Some of its most important benefits apply while you’re alive — preserving control, reducing uncertainty, and making it easier for the right people to step in if they ever need to. With that framing, SB 6347 is a reason to revisit a few practical areas:
- Do your documents still work the way you think they do?
Many estate plans include formulas tied to exemption amounts or “maximum amounts that can pass free of estate tax.” When the Washington estate tax exemption changes midyear, it can affect trust funding decisions and elections during administration.
- Are your assets aligned with the plan?
Even well-drafted documents can fall short if account titling and beneficiary designations don’t match your
intent. That alignment matters for how assets transfer and how smoothly things operate during life and later.
- Do you have a liquidity strategy that matches your wealth?
If much of your net worth is not easily converted to cash, the question is less “what’s the rate?” and more “how will the estate pay what it owes without disrupting the family or the business?” Liquidity planning often includes valuations, buy-sell structures, and insurance reviews.
- Does gifting still make sense for your goals?
Lower future rates may change part of the math, but gifting is rarely just a tax decision. Control, family readiness, and long-term legacy goals still deserve equal weight.
A steady next step: a short checklist
If you’re wondering whether this affects you, start here:
- Update your net worth snapshot (real estate values, retirement accounts, business interests, insurance).
- Estimate Washington estate tax under both 2026 rule sets if your estate is near or above the threshold.
- Review trust and will provisions that reference exemptions, tax formulas, or credit-shelter style funding.
- Confirm beneficiary designations and how major assets are titled.
- Pressure-test liquidity if wealth is concentrated or illiquid.
The bigger picture: Washington policy can move quickly
Washington lawmakers changed rates in 2025 and reversed course in 2026. The takeaway is not that you need to constantly overhaul your plan, it’s that estate planning works best as a living system that stays current as your life and the rules evolve.
When tax laws change, the goal is rarely to “redo everything.” It’s to confirm that your plan still works — that your documents, asset titling, beneficiary designations and liquidity strategy stay aligned with your intent.
If you’d like help estimating your potential Washington estate tax under the 2026 rules — or reviewing how SB 6347 may interact with your trusts, business interests or multistate real estate — our team can help you model scenarios and identify planning opportunities that fit your goals.
FAQs: Washington estate tax and SB 6347
What is the Washington estate tax exemption for 2026?
For deaths from Jan. 1 through June 30, 2026, Washington’s applicable exclusion amount is $3,076,000.
For deaths on or after July 1, 2026, SB 6347 resets the exclusion amount to $3,000,000.
When do the new Washington estate tax rates take effect?
SB 6347 was signed March 24, 2026. The law restores the lower rate structure for deaths on or after July 1, 2026.
(There is also an overall effective date of June 11, 2026, but the rate change most people focus on is tied to date of death.)
Is Washington’s estate tax the same as an inheritance tax?
No. Washington imposes an estate tax on the transfer of property at death. An inheritance tax would be imposed on beneficiaries receiving assets. Washington’s rules are structured as an estate tax.
Who has to file a Washington estate tax return?
A Washington estate tax return is required when the gross value of a decedent’s property exceeds the filing threshold and the decedent was domiciled in Washington — or was a nonresident who owned Washington real estate or tangible personal property.
How are Washington estate tax rates changing under SB 6347?
For deaths between July 1, 2025, and June 30, 2026, the top marginal rate is 35%.
For deaths on or after July 1, 2026, SB 6347 restores the prior graduated rate schedule with a top marginal rate of 20%.
Does Washington estate tax apply if I live outside Washington but own property there?
It can. Washington’s estate tax can apply to nonresidents who own real estate or tangible personal property located in Washington, and it may create a filing requirement depending on the estate’s value and Washington-situs assets.
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