List of countries without income tax:
Somalia
The Bahamas
Saint Kitts and Nevis  
Turks and Caicos  
Saint Barthélemy
Wallis and Futuna  
Vanuatu  
Bahrain  
The British Virgin Islands  
Cayman Islands  
Norfolk Island  
Pitcairn  
The United Arab Emirates  
Nauru  
Monaco  
The Maldives  
Oman  
Kuwait  
Qatar  
Bermuda  
Brunei  
Vatican City State
Western Sahara