Business ‘Marriage penalty’ in Washington state’s new tax stirs debate by Marcus Liu - Business Editor March 21, 2026 by Marcus Liu - Business Editor March 21, 2026 Washington State’s New Tax: A ‘Marriage Penalty’ for High-Income Couples Washington state’s newly enacted 9.9% tax on income exceeding $1 million is drawing scrutiny for its potential impact on married … 0 FacebookTwitterPinterestEmail