Washington Estate Tax Calculator
Washington levies a state estate tax that applies once the taxable estate exceeds its exemption.
Washington Estate Tax Calculator — Calculation Summary
| Input / parameter | Value |
|---|---|
| State | Washington |
| Taxable estate | $4,500,000 |
| Result | |
| Federal estate tax | $0 |
| Washington state estate tax | $170,000 |
| Total estate tax | $170,000 |
Source: Wash. Rev. Code § 83.100 (Table W, eff. 7/1/2026: exemption $3M, 10%→20% graduated; ESB 6347) (2026).
This is an informal planning estimate only, not legal or tax advice. Confirm all figures with the IRS, your state Department of Revenue, or a licensed estate attorney or CPA before relying on them.
Source: Wash. Rev. Code § 83.100 (Table W, eff. 7/1/2026: exemption $3M, 10%→20% graduated; ESB 6347) (2026)
Administration & filing in Washington
- Who pays: The estate pays the tax before distribution to heirs.
- Where filed: With Washington's tax authority (typically the Department of Revenue or Taxation), on a state estate/inheritance tax return.
- Deadline: State returns generally follow the federal estate tax return timeline (IRS Form 706, due ~9 months after death, with a 6-month extension available), but state dates can differ — confirm with the state agency.
- Citation: Wash. Rev. Code § 83.100 (Table W, eff. 7/1/2026: exemption $3M, 10%→20% graduated; ESB 6347) (2026)
Informal estimate only — not legal or tax advice. Figures cite federal statute (IRC § 2010, OBBBA 2025) and each state's Department of Revenue. Tax laws and exemption amounts change yearly; confirm the current rule with the IRS, your state agency, or a licensed estate attorney or CPA before relying on any number.
How this calculator works
Calculation method & sources
- Federal tax: IRC § 2010(c)(3) exemption of $15M per person and IRC § 2001 graduated brackets.
- Washington tax: Wash. Rev. Code § 83.100 (Table W, eff. 7/1/2026: exemption $3M, 10%→20% graduated; ESB 6347) (2026).
How to interpret your Washington estate tax result
- Washington estate tax applies once the taxable estate exceeds $3,000,000.
- Top state rate: 20.0%.
- Washington does not recognize portability; married couples should consider a credit-shelter trust to use both exemptions.
- Federal estate tax is calculated separately and may apply above the $15M federal exemption.