Washington State Inheritance Laws: Estate Tax, Community Property & Capital Gains

Washington State Inheritance Laws: What Changes at $5M+

Washington state inheritance laws create a genuinely unusual planning environment. The state runs its own estate tax with a $2.193 million exemption, layers a 7% capital gains tax on top of federal obligations, and sits inside a community property regime that reshapes how assets transfer at death. If your estate exceeds $5 million, the retail-level guidance you find elsewhere is not written for you. This article is.

How Washington's Intestate Succession Works in Practice

When someone dies without a valid will, Washington's intestate succession statute (RCW 11.04.015) determines who inherits and in what order. The surviving spouse or registered domestic partner stands first. Children follow, then parents, then siblings, then more distant relatives. If no living relatives exist, assets escheat to the state.

For a $5M+ estate, dying intestate is a planning failure, not a neutral outcome. The statutory distribution order ignores your actual intentions, creates potential probate exposure on the full estate, and eliminates any opportunity for tax-efficient transfers. A surviving spouse who inherits everything outright may face a compounded estate tax problem when they die, since the assets now sit in a single taxable estate rather than being distributed across a structure designed to minimize exposure.

Blended families face additional friction. Stepchildren receive nothing under intestate succession unless they have been legally adopted. Half-siblings inherit only from their shared parent's side. Washington courts follow the statute; they do not speculate about what the decedent probably wanted.

Understanding your legal rights as an heir before a family member dies is worth the conversation, even if it feels premature.

How Community Property Affects Inheritance in Washington State

Washington is one of nine community property states. Assets acquired during marriage are owned 50/50 by each spouse, regardless of whose name appears on the title. At death, only the decedent's half of community property, plus all separate property, enters the taxable estate and becomes subject to distribution rules.

Separate property includes assets owned before marriage, inheritances received by one spouse individually, and gifts made specifically to one spouse. The distinction matters enormously for community property rules in other states and for anyone who has moved to Washington from a separate property state mid-marriage.

The practical implication: a couple with $10M in community property has a $5M taxable estate at the first death, not $10M. That is a meaningful difference when Washington's estate tax kicks in at $2.193 million. The surviving spouse retains their $5M half outright. The decedent's $5M half flows through the estate.

Where this gets complicated is with commingled assets. If separate property has been mixed with community property over decades, tracing the original character requires documentation most people have not kept. Courts generally presume assets acquired during marriage are community property unless the separate property character can be proven.

The American Bar Association's Section of Real Property, Trust and Estate Law notes that Washington's community property rules require careful asset titling and documentation throughout the marriage, not just at estate planning time. Retroactive cleanup is possible but expensive.

Does Washington State Have an Estate Tax or Inheritance Tax?

Washington has an estate tax. It does not have an inheritance tax. The distinction matters: an estate tax is paid by the estate before assets reach beneficiaries, while an inheritance tax is paid by the beneficiary after receipt. Washington only imposes the former.

Under RCW 83.100, Washington's estate tax applies to estates exceeding $2.193 million. Rates are progressive, starting at 10% and reaching 20% on taxable estate value above $9 million. These rates apply to the Washington taxable estate, which is calculated separately from the federal taxable estate.

The federal estate tax exemption for 2024 is $13.61 million per individual, or $27.22 million for married couples using portability, per IRS Revenue Procedure 2023-34. That gap between $2.193 million (state) and $13.61 million (federal) is where Washington residents with $5M to $15M estates get hit hardest. They owe significant Washington estate tax while owing zero federal estate tax.

A $10M Washington estate could owe over $1M in state estate tax alone.

Washington does not offer portability of the estate tax exemption between spouses. Federal law does, but Washington's system runs independently. A married couple in Washington who relies on portability for federal purposes still needs separate planning to capture both Washington exemptions.

The 2025 Federal Exemption Sunset: A Closing Window

The Tax Cuts and Jobs Act doubled the federal estate tax exemption. That doubling expires after December 31, 2025, reverting the per-person exemption to approximately $7 million (inflation-adjusted). For anyone with an estate between $7M and $13.61M, the 2024 to 2025 window is a narrow opportunity to transfer wealth at the current exemption level.

The IRS confirmed in final regulations (TD 9884) that gifts made under the higher exemption before the sunset will not be clawed back if the exemption later decreases. That anti-clawback protection is the critical point. You can use the elevated exemption now through lifetime gifts, and those transfers will not be retroactively taxed if the exemption drops.

The practical execution involves irrevocable trusts, direct gifts, or a combination. Spousal Lifetime Access Trusts (SLATs) allow one spouse to gift assets to an irrevocable trust benefiting the other spouse, removing assets from the taxable estate while preserving indirect access. Irrevocable Life Insurance Trusts (ILITs) remove life insurance proceeds from the taxable estate entirely, which matters when a $5M policy would otherwise push an estate into Washington's 20% bracket.

Inaction before the sunset is a decision. It just happens to be the most expensive one available.

Step-Up in Basis and Washington's Capital Gains Tax

Under IRC Section 1014, inherited assets receive a stepped-up cost basis to fair market value at the date of the decedent's death. If a Washington resident holds Amazon stock purchased at $10/share that is worth $200/share at death, the heir's basis resets to $200. Pre-death appreciation disappears for income tax purposes.

That step-up is one of the most valuable provisions in the tax code for estates holding appreciated assets, particularly concentrated tech-sector equity or investment real estate that has compounded for decades.

Washington's 7% capital gains tax complicates the picture. Per the Washington State Department of Revenue, the state imposes a 7% tax on long-term capital gains exceeding $262,000 (2024 threshold, adjusted annually). The step-up eliminates federal and state capital gains tax on pre-death appreciation. But gains accruing after the date of death, when the estate or trust holds and then sells an asset, remain taxable.

The planning question for Washington residents with concentrated positions: gift the asset during life (forfeiting the step-up but potentially using annual exclusions or trust structures) or hold until death (preserving the step-up and eliminating decades of embedded gain). The right answer depends on the asset's basis, the expected holding period, and the heir's own tax situation.

For inherited investment portfolios over $262,000 in post-death gains, heirs should model the Washington capital gains tax exposure before liquidating. Selling immediately after inheriting is not always the cleanest move, even with a fresh basis.

Wills and Probate in Washington: What Actually Matters at Scale

A valid Washington will requires the testator to be at least 18, of sound mind, and to sign the document in the presence of two witnesses who also sign. That baseline is straightforward. The probate process that follows is where complexity and cost accumulate.

Washington probate typically runs six months to two years. For larger estates with real estate, business interests, or contested distributions, the longer end is common. Probate is a public process: the will, the inventory of assets, and the creditor claims all become part of the court record.

For estates above $5M, the more relevant question is how to structure assets so that probate is minimized or bypassed entirely. Assets held in a revocable living trust pass outside probate. Beneficiary designations on retirement accounts, life insurance, and transfer-on-death accounts also bypass probate. Joint tenancy with right of survivorship transfers automatically at death.

The essential inheritance documents required to administer a Washington estate include the original will, death certificate, Letters Testamentary from the probate court, and asset-specific transfer documents. Organizing these in advance reduces the administrative burden on executors significantly.

The small estate affidavit threshold of $100,000 is not relevant for this readership. What is relevant: a properly funded revocable living trust can eliminate probate entirely for assets held inside it, while a pour-over will captures any assets inadvertently left outside the trust.

Trust Strategies for Washington Estates Above $5M

Trusts are not optional planning for Washington estates at this level. They are the primary mechanism for managing estate tax exposure, avoiding probate, and structuring multigenerational transfers.

Revocable Living Trusts avoid probate and maintain privacy, but do not reduce estate taxes. Assets in a revocable trust are still included in the taxable estate. Their value is administrative efficiency and continuity, not tax reduction.

Irrevocable Trusts remove assets from the taxable estate permanently. Irrevocable trusts for Washington estates come in several forms, each with different tax and access tradeoffs. The key ones for $5M+ estates:

• Spousal Lifetime Access Trusts (SLATs): One spouse gifts assets to an irrevocable trust for the benefit of the other. Assets leave the donor's taxable estate while the beneficiary spouse retains access. Requires careful planning to avoid reciprocal trust doctrine issues if both spouses create SLATs simultaneously. - Irrevocable Life Insurance Trusts (ILITs): The trust owns the life insurance policy. Death benefit proceeds stay outside the taxable estate. Particularly effective when life insurance is being used to fund an anticipated estate tax liability.

• Qualified Personal Residence Trusts (QPRTs): The grantor transfers a primary or vacation residence into an irrevocable trust, retaining the right to live there for a term of years. The gift is valued at a discount because of the retained interest, reducing the taxable transfer. - Charitable Remainder Trusts (CRTs) and Charitable Lead Trusts (CLTs): Useful for estates with philanthropic goals. A CRT provides income to the grantor or heirs for a period, with the remainder passing to charity. A CLT does the reverse. Both generate charitable deductions and can reduce the taxable estate.

Dynasty Trusts and Washington's Jurisdictional Limitation

Washington does not fully replicate the trust-friendly statutes of South Dakota, Nevada, or Delaware. Those states have abolished the Rule Against Perpetuities, allowing trusts to hold assets in perpetuity across multiple generations. Washington limits trust duration, which constrains multigenerational planning structures.

For Washington residents pursuing dynasty trust strategies, the practical solution is establishing the trust in a more favorable jurisdiction while maintaining Washington residency. South Dakota, Nevada, and Delaware offer perpetual trust statutes, no state income tax on trust income, and strong asset protection provisions. An attorney licensed in both Washington and the chosen trust situs state is required to structure this correctly.

The trust situs decision is not merely administrative. It determines the applicable law for trust administration, creditor protection, and the taxation of trust income. Getting it wrong creates expensive problems for beneficiaries decades later.

Generational wealth transfer planning that spans multiple generations requires this level of jurisdictional analysis. The choice of where to domicile a dynasty trust is as consequential as the choice of trustee.

Surviving Spouse Rights and the Marital Deduction

Washington law gives surviving spouses significant protections. Beyond retaining their half of community property, a surviving spouse can claim an elective share of the deceased spouse's estate even if the will provides for less. This prevents a spouse from being disinherited entirely.

At the federal level, the unlimited marital deduction under IRC Section 2056 allows an unlimited transfer of assets to a surviving U.S. citizen spouse free of federal estate tax. For Washington state purposes, the marital deduction also applies, deferring estate tax until the surviving spouse's death.

The deferred tax problem is real. A surviving spouse who inherits a $15M estate outright now holds a $15M taxable estate. At their death, Washington's estate tax applies to everything above $2.193M, and the federal exemption (post-sunset) may be only $7M. The marital deduction defers the tax; it does not eliminate it.

Credit Shelter Trusts (also called Bypass Trusts) address this by funding a trust at the first death up to the estate tax exemption amount, keeping those assets outside the surviving spouse's taxable estate. The surviving spouse can benefit from the trust during their lifetime, but the assets do not compound inside their taxable estate.

Washington's lack of portability between spouses for the state exemption makes Credit Shelter Trust planning more important here than in states that mirror the federal portability rules.

Registered Domestic Partners and Non-Traditional Structures

Under RCW 26.60, Washington grants registered domestic partners substantially the same inheritance rights as married spouses under state law. That includes intestate succession rights and community property protections. The practical effect: a registered domestic partner stands in the same position as a spouse for Washington inheritance purposes.

The federal picture is different. Federal tax treatment of domestic partnerships does not always mirror state treatment. The unlimited marital deduction under federal law applies to legally married spouses, not domestic partners, unless the couple is legally married under state law. For same-sex couples who are legally married, federal treatment is identical to opposite-sex married couples following the Supreme Court's Obergefell decision.

Unmarried partners with no formal registration have no automatic inheritance rights under Washington law. Without a will, a long-term partner inherits nothing. For high-net-worth individuals in non-traditional arrangements, this is a planning gap that a will and beneficiary designations can close, but only if the documents are actually executed.

Resolving common inheritance disputes that arise from ambiguous or outdated beneficiary designations is one of the more preventable problems in estate administration.

Divorce, Beneficiary Designations, and the Documents That Override Your Will

Washington law automatically revokes will provisions favoring an ex-spouse upon divorce. That protection does not extend to beneficiary designations on retirement accounts, life insurance policies, or transfer-on-death accounts. Those documents are governed by contract law, not probate law, and they transfer assets regardless of what the will says.

The IRS addresses this in IRS Publication 559, which covers the income tax obligations of estates and beneficiaries, including the treatment of inherited IRAs under the SECURE Act's 10-year rule. An inherited IRA that passes to an unintended ex-spouse because the beneficiary designation was never updated creates both a family conflict and a tax problem.

Post-divorce estate plan review should cover: will, revocable trust, all retirement account beneficiary designations, life insurance beneficiary designations, transfer-on-death account registrations, powers of attorney, and healthcare directives. Missing any one of these can override the intent of all the others.

Distributing inheritance to beneficiaries according to the decedent's actual wishes requires that every document in the estate plan points in the same direction.

Multi-State Estates and Washington's Community Property Reach

Washington residents with real estate, business interests, or financial accounts in other states face a layered planning problem. Real property is generally governed by the law of the state where it sits. Personal property follows the decedent's domicile.

A Washington resident who owns a vacation home in Florida (a separate property state) and investment real estate in California (a community property state) has assets governed by three different legal regimes. The characterization of those assets as community or separate property for Washington purposes depends on when and how they were acquired, not simply where they are located.

Moving to Washington from a separate property state mid-marriage creates quasi-community property questions. Washington treats property acquired in a separate property state as it would have been treated had it been acquired in Washington, for purposes of intestate succession and the surviving spouse's rights.

Similar inheritance laws in neighboring states illustrate how much variation exists across state lines, even for residents who consider themselves primarily Washington-based. Multi-state estate planning requires attorneys who understand the interaction between jurisdictions, not just the rules of one state.

References

• Washington State Legislature -- "RCW 11.04.015 -- Descent and Distribution (Intestate Succession)" (2023).
• Washington State Legislature -- "RCW 83.100 -- Estate and Transfer Tax Act" (2023).
• Internal Revenue Service -- "Revenue Procedure 2023-34: 2024 Estate and Gift Tax Exemption" (2023).
• Internal Revenue Service -- "IRC Section 1014 -- Basis of Property Acquired from a Decedent."
• Washington State Department of Revenue -- "Capital Gains Tax -- Washington State Long-Term Capital Gains" (2023).
• American Bar Association -- "ABA Section of Real Property, Trust and Estate Law -- Community Property and Estate Planning."
• Internal Revenue Service -- "IRS Publication 559 -- Survivors, Executors, and Administrators" (2024).
• Internal Revenue Service -- "IRC Section 2056 -- Marital Deduction."
• Washington State Legislature -- "RCW 26.60 -- Domestic Partnerships" (2023).
• Washington State Department of Revenue -- "Estate Tax" (2023).