Apportioning Investment Income

June 30, 2026 Overview The Washington State Department of Revenue (“The Department”) has issued new guidance on apportioning receipts from investment income. In that guidance, the Department states that its current understanding is that “investment...

A Reminder: Washington’s ESSB 5814 Penalty Relief Program

Starting Oct. 1, 2025, Washington expanded retail sales tax (and retailing B&O) to several service categories under ESSB 5814. This has caused some confusion for taxpayers and potential missteps with compliance. The good news is that there is a penalty relief...

2026 Washington Legislative Wrap-Up

The Washington Department of Revenue released its Summary of 2026 Legislation, covering tax-related bills enacted during the 2026 legislative session. New Topics Insurance Exemptions and Advanced Computing Surcharge HB 2487 clarifies that taxpayers are not exempt from...

Washington Enacts New “Millionaires Tax”

At a Glance Washington has enacted a new tax aimed at high-income households. Under ESSB 6346, the state will impose a 9.90% tax on Washington taxable income beginning January 1, 2028. This is not a general tax on all income and it is not framed as a tax on wealth or...

Washington Authorizes Prepayment of Capital Gains Tax

Washington has passed HB 1376, a technical but significant update to the state’s capital gains tax procedures. This bill provides a new timing mechanism for taxpayers to better align their state tax payments with federal tax planning. Key Provisions of HB 1376...

Washington Estate Tax Update: New Rates and Limits for 2026

Washington’s estate tax landscape is shifting. Under ESB 6347, several key changes have been enacted that will impact estate planning for deaths occurring in 2026 and beyond. This legislation effectively rolls back previous high-rate increases, restoring a more...