Washington Estate
Tax Calculator

Washington imposes a state estate tax with an exemption of **$2.19 million**, indexed for inflation. Graduated rates range from 10% to 20%, with the top rate applying to taxable estates exceeding $9 million.

Washington's top rate ties Hawaii for the highest state estate tax rate in the country.

Washington is a community property state, which fundamentally shapes estate tax planning. Community property receives a full step-up in basis for both halves at the first spouse's death (under IRC 1014(b)(6)), but for estate tax purposes, only the decedent's half of community property is included in the taxable estate.

This distinction makes Washington community property rules a cornerstone of integrated income and estate tax planning.

Washington's **$2.19 million** exemption is a fraction of the federal $15 million exemption, creating a wide band of estates subject to state but not federal estate tax. Washington does not offer portability of its state exemption.

Given the high top rate of 20%, the state estate tax can represent a substantial liability.

A qualified small business deduction of up to $2.5 million is available for estates that include qualifying small business interests. This deduction can reduce or eliminate Washington estate tax for many family business owners.

The business must meet active trade or business requirements and employment thresholds to qualify.

The community property regime requires characterizing assets as community or separate property before computing estate tax. Commingling of separate and community property — common in second marriages or after relocating from a common-law state — complicates this analysis.

A community property agreement can clarify ownership but may trigger gift tax consequences if one spouse contributes disproportionate assets.

Washington has no personal income tax, which affects the overall planning calculus. High-net-worth Washington residents may tolerate the estate tax in exchange for lifetime income tax savings compared to high-income-tax states.

However, the 20% top estate tax rate provides strong incentive for planning. Irrevocable trusts, family limited partnerships, and strategic use of the small business deduction are core tools in Washington estate planning.

Washington's 20% top rate and community property rules require precise modeling. Use this estimator to project Washington estate tax alongside federal liability.

Free for all states and DC.

Washington residents with taxable estates face a two-layer system: the federal estate tax (exemption of $15 million in 2025, top rate of 40%) and the Washington estate tax (exemption of $2.19 million). The gap between these exemptions creates a range where only the state tax applies.

An estate valued at $8 million, for example, may owe Washington estate tax while owing nothing at the federal level.

The federal return (Form 706) allows a deduction for state estate taxes paid, which partially offsets the double-taxation effect but does not eliminate it. The state tax is deductible on the federal return as an estate administration expense or under the state death tax credit rules, depending on the estate's circumstances.

The net result is that combined effective rates in Washington can exceed 45% on estates large enough to trigger both layers.

Planning for this interaction requires modeling both taxes simultaneously. Strategies that reduce the Washington taxable estate — such as lifetime gifts, charitable bequests, and irrevocable trusts — may also reduce federal exposure, but the relative benefit depends on where the estate falls within each jurisdiction's rate brackets.

Use our Washington estate tax calculator to model both layers side by side, and check the Washington probate cost calculator to estimate administration expenses.

Federal law permits a surviving spouse to use the deceased spouse's unused exclusion (DSUE) — commonly called portability — by timely filing Form 706 for the first-to-die spouse. This allows married couples to shelter up to $30 million federally without trust-based planning.

However, most estate-tax states, including Washington, do not offer portability of the state exemption.

This asymmetry makes bypass trusts (also called credit shelter trusts or B trusts) essential in Washington. At the first spouse's death, funding a bypass trust up to the Washington exemption amount preserves that exemption for state tax purposes.

Without the trust, the unlimited marital deduction passes everything to the surviving spouse tax-free at the first death — but the surviving spouse's estate then has only one Washington exemption, effectively wasting the first spouse's.

The bypass trust should be sized carefully. Overfunding it beyond the Washington exemption wastes the marital deduction benefit; underfunding it fails to capture the full state exemption.

For married couples with estates above $2.19 million but below $15 million, the bypass trust is the single most impactful planning tool available. Review your plan with the Washington estate tax estimator, and use the executor fee calculator to account for administration costs in your projections.

The $2.19 million Washington exemption establishes a lower threshold than the federal exemption, making proactive estate reduction strategies more urgent. Irrevocable trusts are the primary vehicle: irrevocable life insurance trusts (ILITs) remove life insurance proceeds from the taxable estate, spousal lifetime access trusts (SLATs) allow married couples to remove assets while retaining indirect access, and qualified personal residence trusts (QPRTs) transfer a home at a discounted gift tax value.

Annual exclusion gifting — currently $19,000 per recipient (2025) — reduces the taxable estate dollar-for-dollar without consuming the lifetime gift exemption. For Washington residents near the $2.19 million threshold, a sustained gifting program over several years can bring the estate below the state exemption entirely.

Charitable remainder trusts (CRTs) and charitable lead trusts (CLTs) offer additional reduction while generating income tax deductions.

GRATs (grantor retained annuity trusts) are particularly effective in low-interest-rate environments, transferring asset appreciation to beneficiaries with minimal or zero gift tax cost. For Washington business owners, entity-level planning — family limited partnerships, LLCs with valuation discounts, and buy-sell agreements — can reduce the reportable value of closely held interests for both state and federal purposes.

Compare strategies using the Washington estate tax calculator or find a Washington estate planning attorney.