Income taxes are the major source of direct tax revenue. Personal income taxes are levied at a rate of 0%, 20%, and 33.33%. The corporate tax rate is 45% for commercial companies (generally nonmanufacturing companies) and 35% for all other companies. Other taxes include property tax and consumption tax on locally manufactured goods, a withholding tax of 15%, and stamp taxes. Local government authorities derive their revenues primarily from land, building, and service taxes. Tax evasion is a constant problem.