Washington State Estate Tax: A Case Study and Strategies to Reduce Liability
Many people are surprised to learn that the Washington State estate tax is one of the highest in the country, with a progressive tax rate ranging from 10% to 20%, and an exemption threshold of just $2.193 million per person in 2025. Without proper planning, families with assets above these levels can face steep estate tax bills, potentially diminishing the wealth passed on to heirs. This post will explore how a lack of planning can lead to costly tax consequences and then outline three common strategies to minimize or avoid the Washington State estate tax.
Case Study: A Couple with $5 Million in Assets
Let’s assume a married couple living in Washington State has a combined net worth totaling $5 million. This includes all household assets: the house, retirement accounts, annuities, etc. If one spouse passes away and leaves their entire estate to the surviving spouse, no estate tax is owed due to the unlimited marital deduction. However, when the surviving spouse passes away, their estate will then include the entire $5 million in assets.
Since Washington State does not allow the portability of exemptions between spouses (unlike federal law), the $2.193 million exemption only applies to the death of the second spouse. In the case of the surviving spouse worth $5 million, this leaves $2.807 million subject to Washington State’s estate tax at their passing.
Tax Calculation
Using Washington’s progressive estate tax rates:
- $2.193 million is exempt from any estate tax, $0 tax due for estate below this amount
- The first $1 million above the exemption level is taxed at 10%, a $100k estate tax bill.
- The next $1 million is taxed at 14%, adding $140,000 to the tax bill.
- The remaining $807,000 is taxed at 15%, contributing $121,050 to the estate tax bill.
Total WA Estate Tax Bill: $361,050
Without strategic planning in place, this couple’s heirs would lose over $360,000 to state taxes, which equates to more than 7% of their total estate.
Taxable Estate Above $2.193M Exemption | Marginal Rate |
$0 – $1,000,000 | 10% |
$1,000,000 – $2,000,000 | 14% |
$2,000,000 – $3,000,000 | 15% |
$3,000,000 – $4,000,000 | 16% |
$4,000,000 – $6,000,000 | 18% |
$6,000,000 – $7,000,000 | 19% |
Over $7,000,000 | 20% |
Three Common Strategies to Avoid or Minimize Washington Estate Tax
1. Credit Shelter Trusts (Bypass Trusts)
Credit shelter trusts are among the most effective tools for married couples to preserve both spouses' exemptions. When the first spouse dies, part of their assets (up to the $2.193 million exemption) is placed into a trust rather than passing directly to the surviving spouse.
- These trust assets are excluded from the surviving spouse’s taxable estate. The surviving spouse receives financial resources from this trust during their lifetime. The remaining trust assets then pass down to the designated heirs at the 2nd spouse's passing.
- Upon the second spouse’s death, only their remaining assets are subject to the WA estate tax calculation.
Example: If $2.193 million is placed into a credit shelter trust upon the first spouse’s death, the remaining $2.807 million would be the taxable estate size upon the second spouse’s passing, cutting the tax bill significantly.
2. Lifetime Gifting
Washington does not impose a gift tax, making lifetime gifting an effective way to reduce large taxable estates. By leveraging the annual federal gift exclusions ($19,000 per recipient in 2025), individuals can transfer wealth gradually without triggering federal or state taxes.
- For example, a couple could gift up to $38,000 per year per recipient without impacting their federal lifetime exemption.
- Gifts exceeding $19,000 per recipient do not incur gift tax either, as long as the cumulative gifting total remains under the federal lifetime gift exemption limit ($12.92 million in 2025). Gifts above $19,000 must be properly reported on IRS Form 709 to account for their impact on lifetime exemption limit.
- Over time, these gifts reduce the size of their taxable estate while benefiting heirs during their lifetime.
3. Charitable Giving
Charitable donations can entirely remove gifted assets from a taxable estate while supporting meaningful causes. Options include:
- Direct Donations: Any asset donated directly to a qualified charity at your passing is excluded from the taxable estate calculation.
· Donor-Advised Funds (DAFs): Assets contributed to a DAF during your lifetime or at your passing are immediately removed from your taxable estate, reducing estate tax liability. Additionally, DAFs allow heirs to recommend grants to charities in your honor after your passing, ensuring your philanthropic legacy continues across generations.
- Charitable Remainder Trusts (CRTs): This special trust account provides income to donors during their lifetime while transferring remaining assets to charity upon death.
For high-net-worth families who value philanthropy, charitable giving offers dual benefits: it reduces estate taxes and creates a lasting impact.
Conclusion
Without proper planning, families with estates exceeding Washington’s modest exemption threshold risk losing significant wealth to state taxes. Strategies like charitable gifting, lifetime gifting, and Credit Shelter Trusts can help mitigate these liabilities while preserving your legacy for future generations.
Estate planning is a complex and highly individualized endeavor. Consult an experienced financial planner or estate attorney familiar with Washington State laws to develop a tailored strategy that aligns with your goals and protects your wealth from unnecessary taxation. Our Mirus Planning team has a number of local resources that can meet your needs!