Washington Estate Tax: $2.193M Plus Farm-Business Deduction

Washington imposes the most punitive state estate tax in the United States on the highest tier of estates. Under RCW 83.100 (the Washington Estate and Transfer Tax Act), the exemption is $2.193 million per individual (the most recent inflation-indexed figure as of 2024), and graduated rates climb from 10 percent on the first $1 million of taxable amount to 20 percent on amounts above $7 million. The 20 percent top rate is the highest state estate tax rate in the country, exceeding even New York's 16 percent maximum and matching only Hawaii's 20 percent rate (which applies above an $11M threshold, a much smaller universe of estates).

The state offers one significant carve-out: the Farm and Business Deduction under RCW 83.100.046 provides up to $3 million of additional exemption for qualifying agricultural property and family-owned businesses. Combined with the basic $2.193M exemption, a qualifying farm or business estate can shelter up to $5.193M from Washington estate tax. For Eastern Washington wheat and timber families and Puget Sound-area family businesses, the carve-out is the single most important planning tool. For Seattle metro residents with seven-figure homes but no farm or business assets, the basic $2.193M exemption is the binding constraint and aggressive planning is needed for estates above $4M.

This guide walks the Washington estate tax structure under RCW 83.100, the graduated rate table running to a 20 percent top rate, the Farm and Business Deduction under RCW 83.100.046, the community property double step-up that partially offsets the tax burden, and the planning strategies for Seattle metro estates without farm or business assets.

The Washington estate tax structure under RCW 83.100

Washington imposes its estate tax under Chapter 83.100 RCW (the Washington Estate and Transfer Tax Act). The mechanics:

• Filing threshold (applicable exclusion amount): $2,193,000 of Washington taxable estate value (the most recent inflation-indexed figure; verify the current year amount against the Washington Department of Revenue's annual publication).
• Tax base: the taxable amount, calculated as the gross estate minus deductions minus the applicable exclusion amount.
• Rate structure: graduated, from 10 percent on the first $1M of taxable amount to 20 percent on amounts above $7M.
• Tax form: Washington Form ED-100 (Washington Estate Tax Return). Due 9 months after death, same as federal Form 706.
• Gross estate inclusion: follows the federal definition under IRC Section 2031, with additions for non-resident decedents owning Washington-situs real and tangible personal property.
• Deductions: debts, funeral expenses, administration costs, unlimited marital deduction (under RCW 83.100.040(8), incorporating IRC Section 2056), unlimited charitable deduction (under RCW 83.100.040(9), incorporating IRC Section 2055), and the Farm and Business Deduction under RCW 83.100.046.
• Portability: Washington does NOT recognize portability of the unused exemption between spouses.
• Community property: Washington is a community property state under RCW 26.16, providing significant planning leverage through the double step-up in basis under IRC Section 1014(b)(6).

The Washington graduated rate table

RCW 83.100.040(2) establishes the rate table on the taxable amount (gross estate minus deductions minus the $2.193M exclusion):

• $0 to $1,000,000 of taxable amount: 10 percent
• $1,000,000 to $2,000,000: 14 percent
• $2,000,000 to $3,000,000: 15 percent
• $3,000,000 to $4,000,000: 16 percent
• $4,000,000 to $6,000,000: 18 percent
• $6,000,000 to $7,000,000: 19 percent
• Above $7,000,000: 20 percent

Illustrative effective rates on the total Washington taxable estate:

• $3,000,000 estate: $807,000 taxable amount, tax approximately $80,700 (effective rate 2.7 percent)
• $4,000,000 estate: $1,807,000 taxable amount, tax approximately $245,000 (effective rate 6.1 percent)
• $5,000,000 estate: $2,807,000 taxable amount, tax approximately $416,000 (effective rate 8.3 percent)
• $6,000,000 estate: $3,807,000 taxable amount, tax approximately $610,000 (effective rate 10.2 percent)
• $8,000,000 estate: $5,807,000 taxable amount, tax approximately $1,020,000 (effective rate 12.8 percent)
• $10,000,000 estate: $7,807,000 taxable amount, tax approximately $1,475,000 (effective rate 14.8 percent)
• $20,000,000 estate: $17,807,000 taxable amount, tax approximately $3,475,000 (effective rate 17.4 percent)

The Farm and Business Deduction under RCW 83.100.046

RCW 83.100.046 allows up to $3 million in additional deductions for two categories of qualifying property: agricultural property and family-owned business interests. Combined with the basic $2,193,000 exclusion, a qualifying farm or business estate can shelter up to $5,193,000 from Washington estate tax. The categories cannot be stacked; the deduction is $3 million total regardless of how many qualifying assets are included.

Qualifying agricultural property

For agricultural property to qualify under RCW 83.100.046(2)(b), several conditions must be met:

• The land must have been used as a farm by the decedent or a family member for at least 5 of the 8 years immediately preceding death
• Material participation by the decedent or family member must have occurred during those 5 years
• The qualifying heir (a family member of the decedent) must continue to use the property as a farm for at least 5 years after the death
• The property must be located in Washington or contiguous to Washington farm operations

Material participation tracks the IRC Section 2032A federal special-use valuation standards. Passive ownership (cash lease without management involvement) does not qualify. Active farming by the decedent personally or by a family member with management responsibility does qualify.

Qualifying family-owned business

For family-owned business interests to qualify under RCW 83.100.046(2)(c), the conditions are:

• The business must be owned more than 50 percent by family members (the decedent and certain related family members)
• Active management by family members during the 5 of the 8 years before death
• The business must be engaged in a trade or business under IRC Section 162
• The qualifying heir must continue active management for at least 5 years after death
• Gross receipts thresholds and other technical requirements detailed in RCW 83.100.046 and Washington Administrative Code WAC 458-57

Recapture under RCW 83.100.046(7)

If the qualifying heir disposes of the property or ceases qualifying use within 5 years of the death, recapture applies. The recapture amount is the previously-excluded estate tax on the disposed property, plus interest from the original due date of the return. The 5-year continuation requirement is longer than Minnesota's 3-year window and shorter than IRC Section 2032A's 10-year federal recapture window.

Community property and the double step-up

Washington is one of nine community property states (along with CA, AZ, ID, LA, NV, NM, TX, WI) under RCW 26.16. The community property characterization provides a significant tax advantage at death through the double step-up in basis under IRC Section 1014(b)(6).

How it works: in a common-law state (Illinois, New York, Massachusetts), only the decedent's half of jointly held property receives a step-up in basis at death. The surviving spouse's half retains its original cost basis. In a community property state like Washington, both halves of community property receive a step-up at the first spouse's death because each spouse is considered to own a one-half undivided interest in all community property.

Example: a Washington couple owns a $2 million home purchased in 1985 for $200,000. At the first spouse's death, both halves step up to $1 million each, eliminating $1,800,000 of unrealized gain. In Illinois, only the decedent's $1 million half steps up, eliminating only $900,000 of unrealized gain. The community property double step-up saves the surviving spouse approximately $260,000 in capital gains tax (at a combined 23.8 percent federal LTCG plus NIIT, ignoring state since Washington has no income tax).

For Washington estates, the double step-up partially offsets the punishing 20 percent top estate tax rate. A retiree with $5 million in appreciated assets pays approximately $416,000 in Washington estate tax but saves approximately $400,000 to $600,000 in capital gains tax through the double step-up that would not be available in a non-community-property state.

Worked example: $5 million Seattle estate, no farm or business qualification

Patricia, age 81, dies in Bellevue, Washington. Her estate consists of:

• Primary residence (Bellevue): $1,800,000 (purchased for $385,000 in 1992; community property with deceased husband)
• Taxable brokerage account: $1,500,000 (cost basis $600,000)
• Traditional IRA: $1,000,000
• Roth IRA: $300,000
• Life insurance death benefit (owned by Patricia): $300,000
• Bank accounts and personal property: $100,000
• Total gross estate: $5,000,000

Washington estate tax

• Gross estate: $5,000,000
• Deductions: $50,000 administration and funeral costs
• Washington taxable estate: $4,950,000
• Applicable exclusion: $2,193,000
• Washington taxable amount: $4,950,000 minus $2,193,000 equals $2,757,000
• Washington estate tax (graduated rate table on $2,757,000):
• $1,000,000 at 10 percent = $100,000
• $1,000,000 at 14 percent = $140,000
• $757,000 at 15 percent = $113,550
• Total Washington estate tax: approximately $353,550

Federal estate tax

Patricia's $5 million estate is well below the federal $13.99 million exemption in 2026. Federal estate tax: $0. The Washington estate tax paid would be deductible on the federal return under IRC Section 2053 as a debt of the estate if federal tax were owed, but it is not in this case.

Step-up in basis offset

Under IRC Section 1014(a), Patricia's heirs receive a step-up in basis on her capital assets. Because Washington is a community property state and Patricia's home was acquired during marriage, the entire home received a double step-up at her deceased husband's earlier death (assuming community property treatment). The home is now in Patricia's estate at its current $1,800,000 value, which becomes the new basis for her heirs.

The brokerage account, if held as community property, would have received a double step-up at the husband's earlier death. Assuming Patricia properly maintained the community property characterization, the $1,500,000 brokerage receives a fresh step-up at her death, eliminating any remaining unrealized gains. Her children sell the brokerage for $1.5M with $0 in capital gains.

Tax savings from the step-ups: approximately $400,000 to $600,000 in federal capital gains tax that would have otherwise been owed on the appreciation. This partially offsets the $353,550 Washington estate tax.

Planning strategies for Washington residents

Strategy 1: Credit shelter trust for married couples

Like other state estate tax regimes, Washington does not recognize portability between spouses. Each spouse has a $2.193M Washington exemption, and the first spouse's exemption is wasted if everything passes to the surviving spouse via the unlimited marital deduction. A credit shelter trust at the first death directs up to $2.193M into an irrevocable trust for the survivor's benefit, preserving the first spouse's exemption.

Result for couples with $4M combined: both spouses' exemptions are used, sheltering $4.386M from Washington estate tax. For couples with $5M to $8M, the credit shelter trust shelters $2.193M while remaining exposure is handled through other strategies.

Strategy 2: Farm and Business Deduction for qualifying estates

For Eastern Washington farm families and Puget Sound family business owners, the Farm and Business Deduction under RCW 83.100.046 is the highest-leverage planning tool. The $3M deduction stacks on top of the $2.193M basic exemption for a combined $5.193M shelter. Qualification requires 5 years of material participation before death and 5 years of continued use after death by a qualifying heir.

Strategy 3: Irrevocable life insurance trust (ILIT)

Life insurance proceeds are included in the gross estate under IRC Section 2042 if the decedent owned the policy. Patricia's $300,000 policy added approximately $45,000 to her Washington estate tax (15 percent marginal rate on the $300K addition). Moving the policy to an ILIT under IRC Section 2042 removes the proceeds from the gross estate after the 3-year lookback under IRC Section 2035.

For Patricia, transferring the policy to an ILIT and surviving 3 years would have reduced her gross estate to $4.7M, Washington taxable estate to $4.65M, taxable amount to $2.457M, and Washington estate tax to approximately $311,500 — a savings of $42,000 compared to no planning.

Strategy 4: Lifetime gifting under the federal annual exclusion

Washington does not impose a gift tax. The federal gift tax under IRC Section 2501 applies, but annual exclusion gifts ($19,000 per recipient in 2026) reduce the gross estate dollar-for-dollar. For Patricia's estate with 3 children and 6 grandchildren (9 recipients), $171,000 per year of annual exclusion gifts ($19,000 multiplied by 9) for 5 years would remove $855,000 from her estate.

Result: gross estate drops from $5M to $4.145M, taxable amount drops to $1.952M, Washington estate tax drops to approximately $233,000 — a savings of $120,000 versus no gifting.

Trade-off: gifts of appreciated assets carry over the donor's cost basis under IRC Section 1015. The recipient loses the step-up. Patricia should gift cash, high-basis assets, or recently-purchased securities; highly appreciated long-held positions should pass at death to benefit from step-up.

Strategy 5: Relocation to a no-estate-tax state

For Washington residents with estates well above the $2.193M exemption who do not have farm or business assets, relocation to a no-estate-tax state can produce material savings. Florida, Texas, Nevada, Tennessee, Wyoming, and South Dakota all impose neither estate nor income tax. Idaho (no estate tax) is a frequent destination for Eastern Washington retirees because of geographic proximity.

For a Washington resident with a $5M estate, relocating to no-estate-tax Idaho saves approximately $353,550 in Washington estate tax. The relocation must be genuine: severing Washington domicile requires selling or significantly reducing the Washington residence, registering vehicles and to vote in the new state, and the 183-day rule. The Washington Department of Revenue scrutinizes claimed relocations of high-net-worth individuals, particularly when significant Washington ties remain.

The federal-state interaction

For Washington estates above the federal $13.99 million exemption (2026), both Washington and federal estate tax apply. The Washington estate tax paid is deductible on the federal Form 706 under IRC Section 2053 as a debt of the estate. For a $20 million Washington estate:

• Washington estate tax: approximately $3,475,000
• Federal taxable estate after WA tax deduction: $20,000,000 minus $3,475,000 minus $13,990,000 equals $2,535,000
• Federal estate tax at 40 percent on $2,535,000: $1,014,000
• Combined estate tax: approximately $4,489,000 (effective rate 22.4 percent)

The combined effective rate on Washington estates above the federal exemption approaches 50 percent on amounts above the threshold. For ultra-high-net-worth Washington residents, relocation planning or aggressive lifetime gifting becomes essential.

Key takeaways

• Washington imposes an estate tax under RCW 83.100 on estates exceeding $2,193,000 (most recent inflation-indexed figure). The tax applies to the taxable amount above the exemption, with graduated rates from 10 percent to 20 percent.
• The 20 percent top marginal rate on amounts above $7 million of taxable amount is the highest state estate tax rate in the United States.
• The Farm and Business Deduction under RCW 83.100.046 allows up to $3 million of additional exemption for qualifying agricultural property or family-owned businesses. Combined with the basic $2.193M exemption, a qualifying estate can shelter up to $5.193M.
• Qualification for the Farm and Business Deduction requires 5 years of material participation before death and 5 years of continued qualifying use after death. Recapture under RCW 83.100.046(7) applies if the heir disposes of the property within 5 years.
• Washington is a community property state under RCW 26.16, providing a double step-up in basis at the first spouse's death under IRC Section 1014(b)(6). This partially offsets the Washington estate tax burden on appreciated capital assets.
• Washington does NOT recognize portability between spouses. Married couples must use credit shelter trusts to preserve both spouses' $2.193M exemptions.
• Washington does not impose a gift tax or an individual income tax. The combination is unique among states: low living-tax exposure combined with punishing death-tax exposure.
• For Washington estates above the federal $13.99M exemption, both Washington and federal estate tax apply. The combined effective rate on amounts above the federal exemption approaches 50 percent, creating strong incentive for relocation planning or aggressive lifetime gifting for ultra-high-net-worth residents.