Top 10 Nations with Highest Personal Income Tax Rates - Trading Economics 2021-23 Belgium Leads With Tax Rate Of 79.5% Finland's Income Tax Rate Touches 66.75% Portugal Levies 64% Personal Income Tax The United Kingdom Has A Personal Tax Rate Of 63.25% Switzerland's Personal Income Tax Rate Stands At 59.7% Aruba Has A Personal Income Tax Rate Of 58.95% Estonia Levies A Tax Rate Of 58.4% Denmark Charges A Personal Income Tax Of 57.11% Japan Levies Income Tax Of 55% Austria Imposes Personal Income Tax Of 55%