Washington's millionaire tax: what to know |
Washington state's new 9.9% millionaire tax is set to take effect in 2028, but it faces legal challenges from citizens and business groups claiming it is an illegal property tax. Despite these challenges, tax professionals must prepare for its implications. High-net-worth individuals may reconsider residency, as nonresidents could still owe the tax on allocated income. For instance, Jim, who terminates his residency but works briefly in Washington, would owe tax on a portion of his income. The law also affects pass-through entities, requiring a review of tax distribution terms. Christopher S. Brown, a tax partner at Holland & Knight, emphasizes the need for caution regarding residency changes and suggests reviewing tax distribution history to accommodate the new tax starting in 2028.